Title of the invention: manufacturing method of press-molded product, press-molded product, and press-molding apparatus.
Technical field
[0001]
This disclosure relates to a method for manufacturing a press-molded product, a press-molded product, and a press-molding device.
Background technology
[0002]
In a structure composed of a plurality of members, a structural member having a predetermined shape is used to connect the plurality of members. Such structural members are required to transmit loads between the members. Therefore, a flange may be provided that is erected from the vertical wall of the structural member and is attached in surface contact with other members.
[0003]
An example of the structural member is a so-called saddle-shaped member. In such a saddle-shaped member, the floor flange portion and the vertical flange portion erected from the vertical wall are in surface contact with other members. In particular, a saddle-shaped member may have a continuous flange in which the floor flange portion and the vertical flange portion are continuous in order to improve the load transmission capacity. For example, Patent Document 1 (International Publication WO 2013/154114), Patent Document 2 (Patent No. 59586444), Patent Document 3 (Patent No. 5569661), and Patent Document 4 (Patent No. 6265315) are described. It is described that the saddle-shaped floor cross member connecting the side sill and the floor panel has a continuous flange in the vehicle body lower structure.
Outline of the invention
Problems to be solved by the invention
[0004]
On the other hand, as another example of the structural member for connecting the members, there is a structural member having a so-called bag-shaped portion in which vertical walls are formed on three sides of the top plate. As shown in FIG. 39A, in the structural member 10 having the bag-shaped portion, the peripheral wall portion 13 is formed from the three peripheral edges of the top plate portion 11. The floor flange portion 15 extends from the lower end of the peripheral wall portion 13 in the vertical direction (Z direction shown in FIG. 39A). Further, the side vertical flange portion 17 extends from the peripheral end portion of the peripheral wall portion 13 in the circumferential direction.
[0005]
As shown in FIG. 39B, the floor flange portion 15 of the structural member 10 is attached in surface contact with the top plate 21 of one member 20. Further, the side vertical flange portion 17 is attached in surface contact with the vertical wall 31 of the other member 30. As a result, the structural member 10 connects one member 20 and the other member 30, and the load is transmitted.
[0006]
Here, as shown in FIG. 39A, in the conventional structural member 10 having a bag-shaped portion, the floor flange portion 15 and the side vertical flange portion 17 are not continuous, and a notch 19 is formed. Was there. The reason for this is that, when a structural member having a bag-shaped portion is conventionally molded, when a continuous flange is to be formed by drawing, wrinkles are concentrated on a portion between the floor flange portion 15 and the side vertical flange portion 17. It is mentioned that there was a possibility that problems such as poor appearance may occur. On the other hand, although the structural member 10 having the notch 19 does not cause the problem of wrinkles, there is room for improvement in improving the load transmission capacity and the rigidity.
[0007]
Therefore, in a structural member having a bag-shaped portion, in order to improve the load transmission capacity and rigidity, it is required to realize a continuous flange like a saddle-shaped structural member. Here, in order to avoid the above-mentioned problem of wrinkles in the continuous flange caused by drawing molding, for example, as described in Patent Document 4, the vertical wall portion and the flange portion are formed by bending press molding. Molding is also conceivable.
[0008]
However, in the technique described in Patent Document 4, the portion corresponding to the floor flange portion is molded in advance, and the vertical wall portion is bent and molded from the top plate portion (see Patent Document 4, FIG. 28). Therefore, there is a problem that the blank edge portion required for drawing and press-molding the bag-shaped portion cannot be sandwiched, and the technique cannot realize a press-molded product having a bag-shaped portion and a continuous flange.
[0009]
Therefore, the present disclosure has been made in view of the above problems, and the purpose of the present disclosure is a portion between the floor flange portion and the side vertical flange portion in a press-molded product having a so-called bag-shaped portion. It is an object of the present invention to provide a new and excellent method for producing a press-molded product, a press-molded product, and a press-molding apparatus capable of suppressing the concentration of wrinkles generated in the product.
Means to solve problems
[0010]
In order to solve the above problems, according to a certain aspect of the present disclosure, the top plate portion is formed along the three peripheral edges of the top plate portion, and the direction thereof intersects the extending direction of the top plate portion. A floor extending outward from the end opposite to the end continuous with the top plate of the peripheral wall in the direction intersecting the peripheral wall extending from the peripheral edge and the extending direction of the peripheral wall. A flange portion, a side vertical flange portion extending outward from the circumferential end of the peripheral wall portion, and an inclined flange portion which is a continuous inclined wall between the side vertical flange portion and the floor flange portion. It is a method of manufacturing a press-molded product including the first press molding and the second press molding, and the first press molding is a floor flange portion of a metal plate with a first holder and a first die. The metal plate sandwiched between the first holder and the first die is moved relative to the first punch in a state where the portion is sandwiched, and the peripheral wall portion is drawn and formed on the metal plate, which is provided in the first punch. When the metal plate comes into contact with the first punch convex forming portion, the convex convex flange portion formed on the inclined flange portion is bent and formed into the metal plate, and the metal plate comes into contact with the first punch. , The side vertical flange main body located on the opposite side of the inclined flange side end of the side vertical flange part, and the inclined flange part of the floor flange part rather than the inclined flange side end. An intermediate molded product is formed from the metal plate by performing processing including bending and molding the floor flange main body located on the opposite side into at least a metal plate, and the second press molding is an intermediate molded product. On the other hand, there is provided a method for manufacturing a press-molded product, which comprises bending and molding a convex flange portion into an inclined flange portion with a second die and a second punch.
[0011]
In the method for manufacturing a press-molded product, in the press-molded product, the peripheral wall portion is formed on the top plate portion in a direction intersecting the extending direction of the top plate portion and opposite to the extending direction of the peripheral wall portion. It further includes a central vertical flange portion extending from the unfinished end and continuous with the side vertical flange portion, and in the first press forming, the metal is formed by the first pad and the first punch before the draw forming. The plate is formed with a ridgeline portion between the top plate portion and the peripheral wall portion on the end side where the peripheral wall portion is not formed, and a continuous portion between the central vertical flange portion and the side vertical flange portion. May be good.
[0012]
In the method for manufacturing a press-molded product, the first press-molding may include bending and molding a convex flange portion having at least one stepped shape in a side view after the first press-molding into a metal plate.
[0013]
In the method for manufacturing a press-molded product, the first press molding includes bending the side vertical flange portion and the floor flange portion into the metal plate by abutting the metal plate on the first punch. good.
[0014]
In the method for manufacturing the press-molded product, in the first press molding, the metal plate comes into contact with the first punch, so that the side vertical flange main body portion, the side vertical flange main body portion, and the convex flange portion are formed in the side vertical flange portion. The first preliminary ridge line connecting the two, the floor flange main body portion of the floor flange portion, and the second preliminary ridge line connecting the floor flange main body portion and the convex flange portion are bent and molded into a metal plate, and the second press molding is performed. Bends the intermediate molded product with the second die and the second punch so that the first preliminary ridge line is a part of the side vertical flange portion and the second preliminary ridge line is a part of the floor flange portion. It may include performing at least one of the moldings.
[0015]
In the method for manufacturing the press-molded product, in the second press molding, the first preliminary ridge line is bent and molded into a part of the side vertical flange portion by the second die and the second punch, and the second preliminary ridge line is formed on the floor flange portion. It may include bending molding into a part of.
[0016]
In the method for manufacturing a press-molded product, the press-molded product has an upper flange ridge line portion formed between the inclined flange portion and the side vertical flange portion, and a lower portion formed between the inclined flange portion and the floor flange portion. In the first press molding including the flange ridge portion, at least one of the portion that becomes the upper flange ridge portion and the portion that becomes the lower flange ridge portion in the convex flange portion may have a flat shape.
[0017]
Further, in order to solve the above problems, according to another viewpoint of the present disclosure, the top plate portion and the direction formed along the three peripheral edges of the top plate portion and intersecting the extending direction of the top plate portion. In addition, the peripheral wall portion extending from the peripheral portion extends outward from the end opposite to the end continuous with the top plate portion of the peripheral wall portion in the direction intersecting the extending direction of the peripheral wall portion. The floor flange portion, the side vertical flange portion extending outward from the circumferential end of the peripheral wall portion, and the inclined flange portion which is a continuous inclined wall between the side vertical flange portion and the floor flange portion. And, including, press molded products are provided.
[0018]
In the press-molded product, the flange formed around the press-molded product, including the floor flange portion, the side vertical flange portion, and the inclined flange portion, may be continuous over the entire circumference of the press-molded product.
[0019]
In the press-molded product, the line length of the inclined flange portion when viewed from the side may be 10% or more and 70% or less of the distance between the top plate portion and the floor flange portion.
[0020]
Further, in order to solve the above problems, according to another viewpoint of the present disclosure, the top plate portion and the direction formed along the three peripheral edges of the top plate portion and intersecting the extending direction of the top plate portion. In addition, the peripheral wall portion extending from the peripheral portion extends outward from the end opposite to the end continuous with the top plate portion of the peripheral wall portion in the direction intersecting the extending direction of the peripheral wall portion. The floor flange portion that has been formed, the side vertical flange portion that extends outward from the circumferential end of the peripheral wall portion, and the inclined flange portion that is a continuous inclined wall between the side vertical flange portion and the floor flange portion. A press-molding device for obtaining a press-molded product, including the first holder having a portion abutting on a region to be a floor flange portion of one surface of the metal plate, and the other surface of the metal plate. A first die having a portion that abuts on a region to be a floor flange portion, a portion that sandwiches a metal plate between the first holder, and a portion that abuts on a region that becomes a peripheral wall portion of the metal plate, and a first punch. And The first punch convex forming portion that abuts on the region to be the inclined flange portion of one surface of the metal plate and bends and forms the convex flange portion with respect to the metal plate together with the first die, and the side of one surface of the metal plate. In contact with the area to be the vertical flange portion, the side vertical flange body portion located on the opposite side of the inclined flange portion side of the side vertical flange portion to the metal plate with the first die is located on the opposite side to the inclined flange portion. At least the first punch vertical flange forming portion to be bent and formed abuts on the region of one surface of the metal plate to be the floor flange portion, and together with the first die, on the inclined flange portion side of the floor flange portion with respect to the metal plate. The press forming apparatus has a first punched floor flange forming portion for bending and forming at least the floor flange main body portion located on the opposite side of the inclined flange portion from the end portion, and the press forming apparatus has a slope that abuts on the other surface of the convex flange portion. A second die including a second die and a second punch are further included, and the second punch is provided on one surface side of the convex flange portion, and is convex by sandwiching the convex flange portion with the second die. Provided is a press forming apparatus having a second punch slope portion for bending and forming an inclined flange portion from a flange portion.
[0021]
In the press forming apparatus, the first punch vertical flange forming portion has a shape in which the side vertical flange portion is bent and molded, and the first punch floor flange forming portion has a shape in which the floor flange portion is bent and molded. May be good.
[0022]
In the press forming apparatus, the first punch vertical flange forming portion is formed by bending a first preliminary ridge line connecting the side vertical flange main body portion, the side vertical flange main body portion and the convex flange portion among the side vertical flange portions into a metal plate. The first punched floor flange forming portion has a shape in which the floor flange main body portion of the floor flange portion and the second preliminary ridge line connecting the floor flange main body portion and the convex flange portion are bent and formed into a metal plate. The second punch has a first bending molding portion for bending and molding the first preliminary ridge line to a part of the side vertical flange portion with the second die, and It may have at least one of the second bending molding portions for bending and molding the second preliminary ridge line to a part of the floor flange portion with the second die.
The invention's effect
[0023]
As described above, according to the present disclosure, in a press-molded product having a so-called bag-shaped portion, it is possible to suppress the concentration of wrinkles generated in the portion between the floor flange portion and the side vertical flange portion. And an excellent method for manufacturing a press-molded product, a press-molded product, and a press-molding apparatus are provided.
A brief description of the drawing
[0024]
FIG. 1A is a perspective view showing a configuration example of a press-molded product according to the first embodiment of the present disclosure.
FIG. 1B is a side view showing a configuration example of a press-molded product according to the first embodiment.
FIG. 2 is a perspective view schematically illustrating a configuration example of a first mold according to a first embodiment.
FIG. 3 is a perspective view schematically illustrating a configuration example of a second mold according to the first embodiment.
FIG. 4A is a plan view schematically illustrating a first press molding process according to the first embodiment.
FIG. 4B is a side view schematically illustrating a first press molding process according to the first embodiment.
FIG. 5A is a plan view schematically illustrating a first press molding process according to the first embodiment.
FIG. 5B is a side view schematically illustrating a first press molding process according to the first embodiment.
FIG. 6A is a perspective view schematically illustrating a first press molding process according to the first embodiment.
FIG. 6B is an end view schematically illustrating a first press molding process according to the first embodiment.
FIG. 6C is an end view schematically illustrating a first press molding process according to the first embodiment.
FIG. 6D is an end view schematically illustrating a first press molding process according to the first embodiment.
FIG. 7A is a plan view schematically illustrating a first press molding process according to the first embodiment.
FIG. 7B is a side view schematically illustrating a first press molding process according to the first embodiment.
FIG. 8A is a plan view schematically illustrating a first press molding process according to the first embodiment.
FIG. 8B is a side view schematically illustrating a first press molding process according to the first embodiment.
FIG. 9A is a perspective view schematically showing a state after the completion of the first press molding according to the first embodiment.
FIG. 9B is a side view showing a configuration example of an intermediate molded product after the first press molding according to the first embodiment.
FIG. 10A is a plan view schematically illustrating a second press molding process according to the first embodiment.
FIG. 10B is a side view schematically illustrating a second press molding process according to the first embodiment.
FIG. 11A is a plan view schematically illustrating a second press molding process according to the first embodiment.
FIG. 11B is a side view schematically illustrating a second press molding process according to the first embodiment.
FIG. 12A is a plan view schematically illustrating a second press molding process according to the first embodiment.
FIG. 12B is a side view schematically illustrating a second press molding process according to the first embodiment.
FIG. 13A is a plan view schematically illustrating a second press molding process according to the first embodiment.
FIG. 13B is a side view schematically illustrating a second press molding process according to the first embodiment.
FIG. 14A is a plan view schematically illustrating a third press molding process according to the first embodiment.
FIG. 14B is a side view schematically illustrating a third press molding process according to the first embodiment.
FIG. 15A is a plan view schematically illustrating a third press molding process according to the first embodiment.
FIG. 15B is a side view schematically illustrating a third press molding process according to the first embodiment.
FIG. 16A is a plan view schematically illustrating a third press molding process according to the first embodiment.
FIG. 16B is a side view schematically illustrating a third press molding process according to the first embodiment.
FIG. 17 is a supplementary explanatory diagram of the first embodiment.
FIG. 18 is a side view of an intermediate molded product according to a modification of the first embodiment.
FIG. 19 is a side view of an intermediate molded product according to another modification of the first embodiment.
FIG. 20 is a perspective view of a press-molded product according to a modification of the first embodiment.
FIG. 21 is a perspective view of a press-molded product according to another modification of the first embodiment.
FIG. 22 is a perspective view of a press-molded product according to another modification of the first embodiment.
[Fig. 23] As a comparative example, it is a figure which shows the simulation result.
[Fig. 24] As a comparative example, it is a figure which shows the simulation result.
[Fig. 25] Fig. 25 is a diagram showing simulation results as an example.
FIG. 26A is a perspective view showing a configuration example of an intermediate molded product according to a second embodiment.
FIG. 26B is a side view showing a configuration example of an intermediate molded product according to the second embodiment.
FIG. 27 is a perspective view schematically illustrating a configuration example of a first mold according to a second embodiment.
FIG. 28 is a perspective view schematically illustrating a configuration example of a second mold according to a second embodiment.
FIG. 29A is a plan view schematically illustrating a first press molding process according to a second embodiment.
FIG. 29B is a side view schematically illustrating a first press molding process according to a second embodiment.
FIG. 30A is a plan view schematically illustrating a first press molding process according to a second embodiment.
FIG. 30B is a side view schematically illustrating a first press molding process according to a second embodiment.
FIG. 31A is a plan view schematically illustrating a first press molding process according to a second embodiment.
FIG. 31B is a side view schematically illustrating a first press molding process according to a second embodiment.
FIG. 32A is a plan view schematically illustrating a first press molding process according to a second embodiment.
FIG. 32B is a side view schematically illustrating a first press molding process according to a second embodiment.
FIG. 33 is a perspective view schematically showing a state after the completion of the first press molding according to the second embodiment.
FIG. 34A is a plan view schematically illustrating a second press molding process according to the second embodiment.
FIG. 34B is a side view schematically illustrating a second press molding process according to the second embodiment.
FIG. 34C is a side view schematically illustrating an offset amount in the second press molding step according to the second embodiment.
FIG. 35A is a plan view schematically illustrating a second press molding process according to the second embodiment.
FIG. 35B is a side view schematically illustrating a second press molding process according to the second embodiment.
FIG. 35C is a side view schematically illustrating bending of a preliminary ridge line in a second press molding step according to a second embodiment.
[Fig. 35D] As a reference example, it is a partially enlarged view schematically explaining the bending of the preliminary ridge line in the second press molding process.
FIG. 35E is a partially enlarged view schematically illustrating bending of a preliminary ridge line in a second press molding step according to a second embodiment.
FIG. 36A is a plan view schematically illustrating a second press molding process according to the second embodiment.
FIG. 36B is a side view schematically illustrating a second press molding process according to the second embodiment.
FIG. 37 is a supplementary explanatory diagram of the second embodiment.
[Fig. 38] Fig. 38 is a diagram showing simulation results as an example.
FIG. 39A is a perspective view of a conventional structural member.
FIG. 39B is a perspective view showing a state in which conventional structural members are attached between the members.
Embodiment for carrying out the invention
[0025]
[First embodiment]
First, a preferred first embodiment of the present disclosure will be described in detail. In the present specification and the drawings, components having substantially the same functional configuration are designated by the same reference numerals, and duplicate description will be omitted.
[0026]
<1. Configuration of press-molded product 100>
First, the schematic configuration of the press-molded product 100 according to the first embodiment of the present disclosure will be described with reference to FIG. 1A. FIG. 1A is a perspective view of the press-molded product 100 according to the first embodiment. As shown in FIG. 1A, the press-molded product 100 according to the first embodiment is a structural member having a so-called bag-shaped portion 101. Here, the bag-shaped portion 101 means a shape formed along the peripheral edge of the top plate and at least three sides of the top plate are covered with vertical walls, and only a pair of opposite vertical walls formed by bending molding. The purpose is not to include the hat shape that it has. The press-molded product 100 transmits a load between both members by connecting the members.
[0027]
The press-molded product 100 is formed by press-molding a metal plate (corresponding to blank 1 described later in FIG. 2). Details regarding press molding will be described later. The press-molded product 100 is formed of a steel plate. In particular, the press-formed product 100 is formed of a high-strength steel plate. Further, the plate thickness of the blank 1 may be 0.8 mm or more, and may be appropriately set depending on the strength and rigidity of the press-molded product 100. Further, the shape of the blank 1 and the dimensions (distances in the X, Y, Z directions) of the press-molded product 100 after molding can be appropriately set depending on the strength and rigidity of the press-molded product 100.
[0028]
As shown in FIG. 1A, the press-molded product 100 has a top plate portion 110, a peripheral wall portion 120, a floor flange portion 140, a side vertical flange portion 170, and an inclined flange portion 190. The bag-shaped portion 101 of the press-molded product 100 is mainly formed by the top plate portion 110 and the peripheral wall portion 120. Further, in the used state, the press-molded product 100 is joined by surface contact with one member (not shown) by the floor flange portion 140, and another member (not shown) by the vertical flange portion 160 including the side vertical flange portion 170. It is in surface contact with and joined.
[0029]
[Top plate]
The top plate portion 110 is a planar portion extending along the XY plane shown in FIG. 1A in the press-molded product 100. The top plate portion 110 has a substantially rectangular shape having a long side along the X direction in a plan view (Z direction view in FIG. 1A). The top plate portion 110 constitutes a part of the bag-shaped portion 101.
[0030]
[Peripheral wall]
The peripheral wall portion 120 is formed along the three peripheral edges of the top plate portion 110, and extends from the peripheral edge portion in a direction intersecting the extending direction of the top plate portion 110. The peripheral wall portion 120 constitutes a part of the bag-shaped portion 101. Specifically, as shown in FIG. 1A, the peripheral wall portion 120 is bent from a peripheral edge portion including one end in the X direction of the top plate portion 110 and both ends in the Y direction of the top plate portion 110, and extends in the Z direction. Being present.
[0031]
The peripheral wall portion 120 has a central vertical wall portion 121 continuous with one end in the X direction of the top plate portion 110, and a side vertical wall portion 123 continuous with both ends in the Y direction of the top plate portion 110. Further, the peripheral wall portion 120 has a ridgeline vertical wall portion 125 connecting the central vertical wall portion 121 and the side vertical wall portion 123. By connecting the central vertical wall portion 121 and the side vertical wall portion 123 by the ridgeline vertical wall portion 125, the rigidity of the press-molded product 100 is improved, the resistance to twisting and crushing is increased, and the load transmission capacity is increased. Is improved.
[0032]
A top plate ridge line portion 130 having a predetermined radius of curvature is formed between the top plate portion 110 and the peripheral wall portion 120. Specifically, the central top plate ridge line portion 131 is formed between the top plate portion 110 and the central vertical wall portion 121. Further, a side top plate ridge line portion 133 is formed between the top plate portion 110 and the side vertical wall portion 123. The radius of curvature of the top plate ridge line portion 130 is appropriately set depending on the workability at the time of press molding, the strength of the press molded product 100, and the rigidity.
[0033]
A top plate corner portion 135 is formed between the central top plate ridge line portion 131 and the side top plate ridge line portion 133. Further, the top plate corner portion 135 connects the ridgeline vertical wall portion 125 and the top plate portion 110. By connecting the central top plate ridge line portion 131 and the side top plate ridge line portion 133 by the top plate corner portion 135, the rigidity of the press-molded product 100 is improved, the resistance to twisting and crushing is increased, and the load is increased. Communication ability is improved.
[0034]
[Floor flange]
The floor flange portion 140 extends outward from the end opposite to the end continuous with the top plate portion 110 of the peripheral wall portion 120 in a direction intersecting the extending direction of the peripheral wall portion 120. Specifically, as shown in FIG. 1A, the floor flange portion 140 is the end portion of the peripheral wall portion 120 in the Z direction, and the bag-shaped portion 101 is formed from the end portion on the side opposite to the top plate portion 110. It extends outward along the XY plane with respect to the internal space. The floor flange portion 140 is continuous with the central vertical wall portion 121.
The structure of is only a schematic one and does not show the actual mold itself.
[0060]
The mold according to the first embodiment includes the first mold 200 and the second mold 300. The method for manufacturing the press-molded product 100 will be described in detail later, but a portion corresponding to the space between the floor flange portion 140 and the side vertical flange portion 170 with respect to the blank 1 by the first press molding using the first mold 200. An intermediate molded product 50 having a convex flange portion 51 is formed on the surface. Further, by the second press molding using the second mold 300, the convex flange portion 51 is flattened to form the inclined flange portion 190 from the convex flange portion 51, and the press molded product 100 having the inclined flange portion 190 is formed. It is formed.
[0061]
[1st mold]
The first mold 200 is used in the first press molding to preliminarily mold the blank 1 into an intermediate molded product having a predetermined shape (corresponding to the intermediate molded product 50 described with reference to FIG. 9B). Specifically, as shown in FIG. 2, the first mold 200 includes a first holder 210, a first die 230, and a first punch 250.
[0062]
[1st holder]
The first holder 210 abuts on one surface of the blank 1 along the Z direction in FIG. For example, when the first mold 200 moves relative to the vertical direction, the first holder 210 comes into contact with the lower surface of the blank 1. The first holder 210 has a portion of the outer peripheral edge portion of the blank 1 that abuts on the region of the press-molded product 100 that becomes the floor flange portion 140. Further, the first holder 210 has a portion for sandwiching the blank 1 with the first die 230, which will be described later.
[0063]
As an example, the first holder 210 has a holder flat surface portion 211 extending along an XY plane, and has a semicircular shape at a portion of the holder flat surface portion 211 corresponding to the position of the blank 1. It has a notched portion 213 that is notched. The cutout portion 213 is provided with a size capable of avoiding interference with a portion of the first punch 250, which will be described later, that forms the bag-shaped portion 101 of the press-molded product 100.
[0064]
[1st die]
The first die 230 abuts against the other surface of the blank 1 along the Z direction in FIG. For example, when the first mold 200 moves relative to the vertical direction, the first die 230 comes into contact with the upper surface of the blank 1. The first die 230 has a portion of the outer peripheral edge portion of the blank 1 that abuts on a region of the press-molded product 100 that becomes the floor flange portion 140, and a portion that sandwiches the blank 1 between the first holder 210. .. Further, the first die 230 has a portion of the blank 1 that comes into contact with the region of the press-molded product 100 that becomes the peripheral wall portion 120.
[0065]
As an example, the first die 230 has a first die flat surface portion 231, a first die peripheral wall forming portion 233 erected from substantially the center of the first die flat surface portion 231 and an X-direction end of the first die flat surface portion 231. It has a first die convex forming portion 235 provided in the portion and a first die vertical flange forming portion 237 provided at the X-direction end portion of the first die convex forming portion 235.
[0066]
The first die flat surface portion 231 sandwiches the outer peripheral edge portion of the blank 1 with the first holder 210. The first die peripheral wall forming portion 233 is a peripheral wall-shaped portion erected from substantially the center of the first die flat surface portion 231. The first die peripheral wall forming portion 233 forms the peripheral wall portion 120 by drawing and forming the blank 1 with the first punch 250 described later.
[0067]
The first die convex forming portion 235 holds the blank 1 from the upper surface, and forms a convex flange portion 51 having a convex shape on the blank 1. The first die convex forming portion 235 is provided on both sides of the first die peripheral wall forming portion 233 in the Y direction, and has a stepped shape having a predetermined height from the first die flat surface portion 231. The first die vertical flange forming portion 237 is a wall surface erected from the first die convex forming portion 235, and the side vertical flange portion is formed by bending the blank 1 with the first punch 250 described later. A vertical flange portion 160 including 170 is formed.
[0068]
[1st punch]
The first punch 250 abuts on one surface of the blank 1 along the Z direction in FIG. For example, when the first mold 200 moves relative to the vertical direction, the first punch 250 comes into contact with the lower surface of the blank 1. The first punch 250 has a portion that abuts on the region of one surface of the blank 1 to be the peripheral wall portion 120 and performs drawing forming together with the first die 230 to form the peripheral wall portion 120 with respect to the blank 1. Further, the first punch 250 abuts on the region of one surface of the blank 1 to be the inclined flange portion 190, and is bent to form a convex flange portion 51 having a convex shape protruding toward the other surface. It has a first punch convex forming portion 253 which is a convex portion.
[0069]
As an example, the first punch 250 has a first punch peripheral wall forming portion 251, a first punch convex forming portion 253, and a first punch vertical flange forming portion 255. The first punch peripheral wall forming portion 251 is a trapezoidal portion that abuts on the lower surface of the region that becomes the bag-shaped portion 101 of the blank 1. That is, the first punch peripheral wall forming portion 251 is a portion that abuts on the region of one surface of the blank 1 to be the peripheral wall portion 120 and draws and forms the peripheral wall portion 120 with respect to the blank 1 together with the first die 230. The blank 1 is drawn and molded along the outer surface of the first punch peripheral wall forming portion 251 to form the bag-shaped portion 101 of the press-molded product 100.
[0070]
The first punch convex forming portion 253 is a stepped portion provided on both sides of the first punch peripheral wall forming portion 251 in the Y direction. That is, the first punch convex forming portion 253 is in contact with the region of one surface of the blank 1 to be the inclined flange portion 190, and the convex flange portion 51 is bent and molded with respect to the blank 1 together with the first die 230. be. The first punch convex forming portion 253 sandwiches the blank 1 with the first die convex forming portion 235 and bend-molds the blank 1 to form a convex flange portion 51 having a convex shape. The first punch vertical flange forming portion 255 is a wall-shaped portion continuously provided at the ends of the first punch peripheral wall forming portion 251 and the first punch convex forming portion 253. The first punch vertical flange forming portion 255 sandwiches the blank 1 with the first die vertical flange forming portion 237 to form the vertical flange portion 160 of the press-molded product 100.
[0071]
[1st pad]
Further, the first mold 200 may have the first pad 270. The first pad 270 abuts against the other surface of the blank 1 along the Z direction in FIG. For example, when the first mold 200 moves relative to the vertical direction, the first pad 270 comes into contact with the upper surface of the blank 1. The first pad 270 has a first pad top plate holding portion 271, a first pad ridge line forming portion 273, and a first pad vertical flange forming portion 275. The first pad top plate holding portion 271 is a tongue piece-shaped portion of the blank 1 that abuts on the top plate portion 110 of the press-molded product 100. The first pad top plate holding portion 271 sandwiches the blank 1 with the first punch 250.
[0072]
The first pad ridge line forming portion 273 is a portion provided on both sides in the Y direction at the X direction end portion of the first pad top plate holding portion 271. The first pad ridge line forming portion 273 has an arc shape extending from the plane position of the first pad top plate holding portion 271 toward the blank 1 side in the Z direction in the X direction, and further has an arc shape. It has a portion that is bent outward from the tip in the Y direction. The first pad ridge line forming portion 273 is provided on the end portion side of the first pad top plate holding portion 271 on the first pad vertical flange forming portion 275 side. That is, the first pad ridge line forming portion 273 forms a part of the side top plate ridge line portion 133 on the vertical flange portion 160 side. The first pad vertical flange forming portion 275 is a first pad vertical flange forming portion which is a wall-shaped portion erected from the X-direction end portion of the first pad top plate holding portion 271 and the first pad ridge line forming portion 273. The 275 sandwiches the blank 1 with the first punch 250 to form the vertical flange portion 160 of the press-molded product 100.
[0073]
[Second mold]
Next, the second mold 300 of the mold according to the first embodiment will be described. The second die 300 is used to mold the intermediate molded product 50 preformed in the first press molding as the press molded product 100 by the second press molding. Here, the intermediate molded product 50 refers to a product before being molded into the press-molded product 100 by the second press molding, and the press-molded product 100 according to the first embodiment is the final product. It is not intended to suggest. Specifically, as shown in FIG. 3, the second die 300 includes a second die 310 and a second punch 330.
[0074]
[Second die]
The second die 310 abuts on the other surface of the intermediate molded product 50 from the Z direction in FIG. For example, when the second mold 300 moves relative to the vertical direction, the second die 310 comes into contact with the upper surface of the intermediate molded product 50. Further, the second die 310 includes a slope that abuts on another surface of the convex flange portion 51.
[0075]
As an example, the second die 310 is provided at the second die flat surface portion 311, the second die peripheral wall holding portion 313 provided substantially in the center of the second die flat surface portion 311 and the X-direction end portion of the flat surface portion. It has a second die slope portion 315 and a second die vertical flange forming portion 317 continuous from the second die slope portion 315. The second die flat surface portion 311 sandwiches a portion corresponding to the floor flange portion 140 in the intermediate molded product 50 with the second punch 330 described later. The second die peripheral wall holding portion 313 is a peripheral wall-shaped portion erected from substantially the center of the second die flat surface portion 311. The second die peripheral wall holding portion 313 sandwiches a portion corresponding to the peripheral wall portion 120 of the intermediate molded product 50 with the second punch 330 described later.
[0076]
The second die slope portion 315 presses the convex flange portion 51 of the intermediate molded product 50 from the upper surface to form the inclined flange portion 190 on the press molded product 100. The second die slope portion 315 is an inclined wall provided on both sides of the second die peripheral wall holding portion 313 in the Y direction and erected from the second die flat surface portion 311. The second die vertical flange forming portion 317 is a wall surface erected from the second die slope portion 315, and is a vertical flange including the side vertical flange portion 170 of the press-molded product 100 with the second cam 370 described later. The portion 160 is formed.
[0077]
[Second punch]
The second punch 330 abuts on one surface of the intermediate molded product 50 from the Z direction in FIG. For example, when the second mold 300 moves relative to the vertical direction, the second punch 330 comes into contact with the lower surface of the intermediate molded product 50. The second punch 330 is provided on one surface side of the convex flange portion 51 of the intermediate molded product 50, and the inclined flange portion 190 is bent and molded by sandwiching the convex flange portion 51 with the second die 310. ..
[0078]
As an example, the second punch 330 has a second punch flat surface portion 331, a second punch peripheral wall holding portion 333, a second punch slope portion 335, and a second punch vertical flange forming portion 337. The second punch plane portion 331 extends along the XY plane and sandwiches a portion corresponding to the floor flange portion 140 in the intermediate molded product 50 with the second die 310. The second punch peripheral wall holding portion 333 is a trapezoidal portion provided in a substantially central portion of the second punch flat surface portion 331 and in contact with the lower surface of the region corresponding to the bag-shaped portion 101 in the intermediate molded product 50.
[0079]
The second punch slope portion 335 is an inclined wall provided on both sides of the second punch peripheral wall holding portion 333 in the Y direction in FIG. 3 and erected from the second punch flat surface portion 331. The second punch slope portion 335 forms the inclined flange portion 190 by sandwiching the convex flange portion 51 of the intermediate molded product 50 with the second die slope portion 315. That is, the second punch slope portion 335 is provided on one surface side of the convex flange portion 51, and by sandwiching the convex flange portion 51 with the second die 310, the convex flange portion 51 to the inclined flange portion 190 are provided. It is a part to be bent and molded. The second punch vertical flange forming portion 337 is a wall-shaped portion continuously provided at the X-direction end portion of the second punch peripheral wall holding portion 333. The second punch vertical flange forming portion 337 is A portion corresponding to the vertical flange portion 160 in the intermediate molded product 50 is sandwiched between the second pad 350 and the second pad 350, which will be described later.
[0080] [0080]
Further, the second mold 300 may further have a second pad 350. The second pad 350 has a second pad top plate holding portion 351 and a second pad vertical flange forming portion 353. The second pad top plate holding portion 351 is a tongue piece-shaped portion, and a portion corresponding to the top plate portion 110 in the intermediate molded product 50 is sandwiched between the second punch peripheral wall holding portion 333 and the portion corresponding to the top plate portion 110. The second pad vertical flange forming portion 353 is a wall-shaped portion erected from the X-direction end portion of the second pad top plate holding portion 351 and is intermediately formed between the second pad vertical flange forming portion 337 and the second punch vertical flange forming portion 337. A portion corresponding to the vertical flange portion 160 in the product 50 is sandwiched.
[0081]
Further, the second mold 300 may further have a second cam 370. The second cam 370 abuts on the intermediate molded product 50 from the X direction in FIG. The second cam 370 sandwiches a portion corresponding to the vertical flange portion 160 of the intermediate molded product 50 with the second die vertical flange forming portion 317, and defines the shape of the vertical flange portion 160 of the press-molded product 100. It is a dimension.
[0082]
Further, the mold according to the first embodiment may further have a third mold 400. The third mold 400 is composed of a plurality of cams. After the second press molding by the second die 300, the cam of the third die 400 comes into contact with a predetermined position, so that the shape of each part of the press molded product 100 is accurately finished. The details of the third mold 400 will be described later. The mold according to the first embodiment has been described above.
[0083]
(Press molding equipment)
The die according to the first embodiment is used for press molding in a state of being provided in the press molding apparatus 500. As shown in FIGS. 2 and 3, the press molding apparatus 500 includes general drive mechanisms 511 to 516 for performing press molding using a die, and a control mechanism, a detection mechanism, etc. (not shown). It is not particularly limited as long as it is present. For example, the mold can be moved by being driven by a hydraulic cylinder mechanism as a drive mechanism 511 to 516. Further, the positions of the mold and the blank 1 are detected by a laser sensor as a detection mechanism. Further, the function as a control mechanism is realized by the cooperation of a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), and the like. The control mechanism controls the press forming process in the press forming apparatus based on the output from the hydraulic cylinder mechanism, the laser sensor and the like, and the input from the input apparatus. Further, the control mechanism 520 controls the position of the mold, the moving speed, the operation timing, and the like.
[0084]
<3. Manufacturing method>
Next, an example of the manufacturing method of the press-molded product 100 according to the first embodiment will be described with reference to FIGS. 4A to 16B. The method for manufacturing the press-molded product 100 according to the first embodiment includes a first press-molding and a second press-molding. 4A to 8B are diagrams for schematically explaining the first press molding step in the first embodiment. In the first press molding, the bag-shaped portion 101 including the peripheral wall portion 120 of the press-molded product 100 is generally formed by drawing molding, and the convex flange portion 51 is formed between the side vertical flange portion 170 and the floor flange portion 140. It is formed by bending molding. Hereinafter, the first press molding will be described with reference to FIGS. 4A to 8B.
[0085]
(1st press molding)
Specifically, as shown in FIG. 4B, first, the blank 1 is sandwiched between the first holder 210 and the first die 230. Here, as shown in FIG. 4A, the blank 1 is a plate material having a substantially circular shape in a plan view (Z direction view in FIG. 4A), and the longest length in the X direction is about 170 mm in the Y direction. The longest length is about 200 mm. The first holder 210 and the first die 230 sandwich a portion of the blank 1 that becomes the floor flange portion 140 of the press-molded product 100. Specifically, the outer peripheral edge portion of the blank 1 is sandwiched between the holder flat surface portion 211 and the first die flat surface portion 231.
[0086]
Next, as shown in FIG. 5B, the blank 1 sandwiched between the first holder 210 and the first die 230 is moved relative to the first punch 250 to form the first punch 250 and the blank 1. Abuts. Specifically, the substantially central portion of the blank 1 and the upper wall surface of the first punch peripheral wall forming portion 251 come into contact with each other. Further, as shown in FIG. 5A, the X-direction end portion 1A of the blank 1 comes into contact with the first punch vertical flange forming portion 255 and is deformed.
[0087]
Further, in the case of the embodiment in which the first mold 200 has the first pad 270, the first pad 270 comes into contact with the blank 1 prior to the draw forming. As a result, in the press-molded product 100, a part of the side top plate ridge line portion 133, which is the ridge line portion between the top plate portion 110 on the end side where the peripheral wall portion 120 is not formed and the peripheral wall portion 120, is formed. Ridge. Further, a continuous portion between the central vertical flange portion 180 and the side vertical flange portion 170 of the press-molded product 100 is formed. That is, in the first press molding, a part of the side top plate ridge line portion 133, the central vertical flange ridge line portion 183, and the vertical flange corner by the first pad 270 and the first punch 250 before the drawing molding is performed. The portion 185 is formed.
[0088]
Specifically, as shown in FIG. 5A, the blank 1 is sandwiched between the first pad ridge line forming portion 273 and the first punch peripheral wall forming portion 251 so that a part of the side top plate ridge line portion 133 is formed. It is formed. Further, the first pad vertical flange forming portion 275 comes into contact with the X-direction end portion 1A of the blank 1. As a result, as shown in FIG. 5B, the blank 1 is sandwiched between the first pad vertical flange forming portion 275 and the first punch vertical flange forming portion 255, and the blank 1 is partially bent and formed. The formation of the central vertical flange portion 180 and its peripheral portions is started.
[0089]
Here, the molding of the side top plate ridge line portion 133 and the central vertical flange portion 180 by the first pad 270 will be described in more detail with reference to FIGS. 6A to 6D. FIG. 6A is a diagram schematically illustrating a state of molding by the first pad 270. Further, it is an end view of AA'in FIGS. 6B to 6D, and is a diagram schematically explaining a state of molding by the first pad 270.
[0090]
As shown in FIG. 6A, the first pad 270 is brought into contact with the upper surface of the blank 1 prior to the draw forming by the first die 230 and the first punch 250. At this time, as shown in FIG. 6B, first, the tip portion of the first pad ridge line forming portion 273 comes into contact with the blank 1.
[0091]
Further, when the first pad 270 is moved in the Z direction, as shown in FIG. 6C, the blank 1 is sandwiched between the first pad ridge line forming portion 273 and the first punch peripheral wall forming portion 251 and the blank 1 is sandwiched between the side ceilings. A part of the plate ridge line portion 133 is bent and molded. At this time, a surplus thickness of the blank 1 is generated in the middle portion of the blank 1 in the Y direction (see the dotted line region B in FIG. 6C). That is, as a result of sandwiching both ends of the blank 1 in the Y direction by the first pad ridge line forming portion 273 and the first punch 250, bending occurs in the central portion in the Y direction.
[0092]
Further, when the first pad 270 is moved in the Z direction, the side top plate ridge line portion 133 is bent and molded as shown in FIG. 6D. At this time, as shown in FIG. 5B, the central vertical flange portion 180 and the ridgeline vertical flange portion 181 are also bent and formed between the first pad ridge line forming portion 273 and the first punch peripheral wall forming portion 251. By bending and forming these portions, the concentration of tensile strain is suppressed, and the concentration of strain on the finally formed ridgeline vertical flange portion 181 is suppressed.
[0093]
Further, in the formation of the vertical flange portion 181 of the ridgeline, the surplus thickness of the blank 1 shown in FIG. 6C is used for bending forming between the first pad 270 and the first punch 250 due to the material flow, so that the vertical ridgeline portion is formed. Concentration of tensile strain on the flange portion 181 is further suppressed. In this way, by bringing the first pad 270 into contact with the blank 1 prior to drawing and forming, the concentration of strain on the ridgeline vertical flange portion 181 is suppressed, and as a result, the occurrence of cracks is suppressed. The molding of the side top plate ridge line portion 133, the central vertical flange portion 180, and the peripheral portion thereof by the first pad 270 has been described above.
[0094]
Subsequently, as shown in FIG. 7A, the blank 1 sandwiched between the first holder 210 and the first die 230 is further moved relative to the first punch 250, and the peripheral wall portion 120 is drawn by drawing. It begins to form. Specifically, as shown in FIG. 7B, the substantially central portion of the blank 1 is drawn and formed while being sandwiched between the first die peripheral wall forming portion 233 and the first punch peripheral wall forming portion 251. At this time, first, the top plate ridge line portion 130 is drawn and molded. Since the top plate ridge line portion 130 is formed by drawing forming, the occurrence of wrinkles at a portion adjacent to the top plate ridge line portion 130 is suppressed. Actually, as shown in FIG. 7A, the plate thickness of the blank 1 is uniformly reduced from the top plate ridge line portion 130 to the top plate portion 110 and the peripheral wall portion 120 with the drawing forming, and wrinkles are generated. It is suppressed.
[0095]
Further, in the case of the embodiment in which the first mold 200 has the first pad 270, the first pad 270 moves relative to the first punch 250 together with the first holder 210 and the first die 230. As described with reference to FIG. 6C, the first pad ridge line forming portion 273 forms the side top plate ridge line portion 133 with the first punch 250. Further, the X-direction end portion of the blank 1 is sandwiched between the first pad vertical flange forming portion 275 and the first punch vertical flange forming portion 255 and bent to form the central vertical flange ridge line portion 183. Will be done. Further, during drawing forming by the first holder 210 and the first die 230, the first pad top plate holding portion 271 holds a substantially central portion of the blank 1 from above. Finally, the first pad top plate holding portion 271 sandwiches substantially the center of the blank 1 with the upper wall surface of the first punch peripheral wall forming portion 251.
[0096]
As shown in FIGS. 8A and 8B, the blank 1 sandwiched between the first holder 210 and the first die 230 is further moved relative to the first punch 250 to form the peripheral wall portion 120. .. Further, when the blank 1 is brought into contact with the first punch convex forming portion 253, the convex convex flange portion 51 is bent and molded. Specifically, by moving the blank 1 relative to the first punch 250, a part of the blank 1 is sandwiched between the first die convex forming portion 235 and the first punch convex forming portion 253. The convex flange portion 51 is formed by being deformed into at least one stepped shape. The height of the stepped shape of the convex flange portion 51 is appropriately set to the extent that the inclined flange portion 190 can be formed based on the plate thickness and tensile strength of the blank 1.
[0097]
FIG. 9A is an explanatory diagram schematically showing the state after the completion of the first press molding. FIG. 9B is a side view showing an example of the intermediate molded product 50 after the first press molding. As shown in FIGS. 9A and 9B, after the completion of the first press molding, the blank 1 is molded into an intermediate molded product 50 including a shape corresponding to the bag-shaped portion 101 and a convex flange portion 51. The intermediate molded product 50 taken out from the first mold 200 is used for the second press molding.
[0098]
In the first press molding, the angle formed by the portion corresponding to the vertical flange portion 160 including the top plate portion 110, the peripheral wall portion 120, the floor flange portion 140, or the side vertical flange portion 170 of the intermediate molded product 50 is a large obtuse angle. It may be formed so as to be. This makes it possible to alleviate the concentration of strain during molding. In this case, in the second press molding or the third press molding, molding is performed so that the angle formed by each part of the press-molded product 100 is a predetermined angle.
[0099]
(2nd press molding)
Subsequently, the second press molding of the manufacturing method according to the first embodiment will be described with reference to FIGS. 10A to 13B. 10A to 13B are diagrams for schematically explaining the second press molding step in the first embodiment. 2nd press molding Then, the convex flange portion 51 is formed into the inclined flange portion 190 by bending molding. Hereinafter, the second press molding will be described with reference to FIGS. 10A to 13B.
[0100]
First, as shown in FIGS. 10A and 10B, the intermediate molded product 50 comes into contact with the second mold 300. Specifically, the inner peripheral surface of the portion corresponding to the peripheral wall portion 120 in the intermediate molded product 50 and the outer peripheral surface of the second punch peripheral wall holding portion 333 come into contact with each other. Further, the second pad top plate holding portion 351 comes into contact with the portion corresponding to the top plate portion 110 of the intermediate molded product 50. The intermediate molded product 50 is pushed down by the second pad top plate holding portion 351 and guided by the second punch peripheral wall holding portion 333 to move relative to the second punch 330.
[0101]
Next, as shown in FIGS. 11A and 11B, as a result of the intermediate molded product 50 being pushed down by the second pad top plate holding portion 351, the portion corresponding to the floor flange portion 140 of the intermediate molded product 50 is the second. 2 It comes into contact with the punch flat surface portion 331. Further, the inner peripheral surface of the bag-shaped portion 101 of the intermediate molded product 50 comes into contact with the outer peripheral surface of the second punch peripheral wall holding portion 333. As a result, the intermediate molded product 50 is held in the second mold 300. At this time, the convex flange portion 51 of the intermediate molded product 50 is located on the upper side of the second punch slope portion 335.
[0102]
Subsequently, as shown in FIGS. 12A and 12B, the second die 310 moves along the Z direction toward the intermediate molded product 50. The second die flat surface portion 311 sandwiches a portion corresponding to the floor flange portion 140 of the intermediate molded product 50 with the second punch flat surface portion 331. Further, the second die peripheral wall holding portion 313 sandwiches a portion corresponding to the peripheral wall portion 120 of the intermediate molded product 50 with the second punch peripheral wall holding portion 333. The second die slope portion 315 presses the convex convex flange portion 51 between the second die slope portion 335 and the second punch slope portion 335, and bends and forms the convex shape into a flat shape. As a result, the inclined flange portion 190, which is a continuous inclined wall between the floor flange portion 140 and the side vertical flange portion 170, is formed.
[0103]
Here, for example, if a flat inclined wall is to be formed from the beginning without forming the convex flange portion 51, the end portion of the inclined wall (X direction when viewed from the side (Y direction)). The present disclosers have found that the wall thickness is uneven (wrinkles are concentrated) at the edge). It is considered that this is because when the flat shape is directly formed, the compressive strain is concentrated on the end of the inclined wall due to the material flow during press forming, and more wrinkles are formed. Therefore, as a result of diligent studies, the present disclosers have found that once a convex flange portion 51 having a convex shape is formed and the convex flange portion 51 is crushed, wrinkles can be dispersed and the concentration of wrinkles can be suppressed. .. Specifically, by pressing the convex flange portion 51 of the intermediate molded product 50 to form a flat shape, the concentration of wrinkles on the inclined flange portion 190 of the press molded product 100 is suppressed. In particular, when the press-formed product 100 is made of a high-strength steel plate, the concentration of wrinkles can be suppressed by pressing the convex flange portion 51 to form the inclined flange portion 190.
[0104]
Subsequently, as shown in FIGS. 13A and 13B, the second cam 370 abuts on the vertical flange portion of the intermediate molded product 50 along the X direction (see the arrow in FIG. 13). That is, the second cam 370 sandwiches the portion corresponding to the vertical flange portion 160 of the intermediate molded product 50 with the second punch vertical flange forming portion 337. The first press molding and the second press molding in the method for manufacturing the press molded product 100 according to the first embodiment have been described above. The method for manufacturing the press-molded product 100 according to the first embodiment may include various additional steps necessary for manufacturing the press-molded product 100, in addition to the first press molding and the second press molding.
[0105]
(3rd press molding)
Further, the method for manufacturing the press-molded product 100 according to the first embodiment may include a third press-molding. The third press molding is a step performed after the second press molding in order to reduce the radius of curvature of the ridgeline portion of the press molded product 100 and improve the shape accuracy. 14A to 16B are schematic views illustrating a third press molding of the method for manufacturing the press molded product 100 according to the first embodiment. Hereinafter, the third press molding will be described with reference to FIGS. 14A to 16B.
[0106]
As shown in FIGS. 14A and 14B, the press-molded product 100 is arranged in the third mold 400. The third mold 400 has a third pad 410, a third punch 430, a third central vertical wall cam 450, and a third side vertical wall cam 470. The third punch 430 supports the bag-shaped portion 101 of the press-molded product 100 from the inside, and also supports the floor flange portion 140 and the vertical flange portion. The third pad 410 can press the top plate portion 110 of the press-molded product 100 from above. Further, the third central vertical wall cam 450 faces the central vertical wall portion 121 and the ridgeline vertical wall portion 125 of the press-molded product 100, and the third side vertical wall cam 470 faces the side vertical wall portion 123 of the press-molded product 100. Facing.
[0107]
As shown in FIGS. 15A and 15B, the press-molded product 100 is held by the third pad 410 and the third punch 430. Subsequently, as shown in FIGS. 16A and 16B, the third central vertical wall cam 450 and the third side vertical wall cam 470 move toward the press-molded product 100 (see the arrow in FIG. 16). As a result, the press-molded product 100 is sandwiched between the third central vertical wall cam 450, the third side vertical wall cam 470, and the third punch 430, and the radius of curvature at each portion of the press-molded product 100 is increased. It is smaller than before the third press molding. As a result, the press-molded product 100 has a predetermined shape. The method for manufacturing the press-molded product 100 according to the first embodiment has been described above.
[0108]
The first embodiment will be supplemented as follows with reference to FIG.
In the first embodiment, the first punch 250 abuts on the region of one surface of the blank 1 to be the inclined flange portion 190, and bends and forms the convex flange portion 51 with respect to the blank 1 together with the first die 230. The 1-punch convex forming portion 253 abuts on the region serving as the side vertical flange portion 170 on one surface of the blank 1, and together with the first die 230, the inclined flange portion 190 side of the side vertical flange portion 170 with respect to the blank 1 The first punch vertical flange forming portion 255 for bending and forming at least the side vertical flange main body portion 170B located on the side opposite to the inclined flange portion 190 from the end portion 170A, and the floor flange portion 140 on one surface of the blank 1. At least the floor flange main body 140B located on the side opposite to the inclined flange 190 from the end 140A on the inclined flange 190 side of the floor flange 140 with respect to the blank 1 together with the first die 230 in contact with the region. It has a first punch floor flange forming portion 257 to be bent and molded.
[0109]
Further, in the first embodiment, the first punch vertical flange forming portion 255 includes a side vertical flange portion 170 including an end portion 170A on the inclined flange portion 190 side and a side vertical flange main body portion 170B among the side vertical flange portions 170. It has a shape in which the entire 170 is bent and molded. Further, in the first embodiment, the first punch floor flange forming portion 257 is the entire floor flange portion 140 including the end portion 140A on the inclined flange portion 190 side and the floor flange main body portion 140B of the floor flange portion 140. Has a shape to be bent and molded.
[0110]
The second die 310 includes a slope 312 that abuts on the other surface of the convex flange portion 51. The second punch 330 is provided on one surface side of the convex flange portion 51, and by sandwiching the convex flange portion 51 with the second die 310, the inclined flange portion 190 is bent and formed from the convex flange portion 51. It has a second punch slope portion 335.
[0111]
Then, in the first embodiment, in the first press molding, the blank 1 comes into contact with the first punch convex forming portion 253 provided on the first punch 250, so that the convex convex shape formed on the inclined flange portion 190 is formed. By bending the flange portion 51 into the blank 1 and contacting the blank 1 with the first punch 250, the side of the side vertical flange portion 170 is on the opposite side of the inclined flange portion 190 from the end portion 170A on the inclined flange portion 190 side. The side vertical flange main body 170B located in the floor flange portion 140 and the floor flange main body 190B located on the side opposite to the inclined flange portion 190 from the end portion 140A on the inclined flange portion 190 side of the floor flange portion 140 are bent to at least blank 1. By performing processing including molding on the blank 1, the intermediate molded product 50 is formed from the blank 1.
[0112]
In this first press molding, when the blank 1 comes into contact with the first punch 250, the side vertical flange portion 170 includes the end portion 170A on the inclined flange portion 190 side and the side vertical flange main body portion 170B. This includes bending and molding the flange portion 170, the end portion 140A of the floor flange portion 140 on the inclined flange portion 190 side, and the floor flange portion 140 including the floor flange main body portion 140B into the blank 1.
[0113]
Further, in the first embodiment, the second press molding includes bending the convex flange portion 51 into the inclined flange portion 190 with the second die 310 and the second punch 330 with respect to the intermediate molded product 50.
[0114]
(Action effect)
According to the first embodiment, in the press-molded product 100, the floor flange portion 140 and the side vertical flange portion 170 are continuous by the inclined flange portion 190. Further, the floor flange portion 140 and the side vertical flange portion 170 extend from the bag-shaped portion 101 and are continuous. As a result, the rigidity of the press-molded product 100 is improved, the resistance to twisting and crushing is increased, and the load transmission capacity is also improved.
[0115]
Further, according to the first embodiment, in the press-molded product 100, the convex flange portion 51 is formed and then the inclined flange portion 190 is formed at the continuous portion between the floor flange portion 140 and the side vertical flange portion 170. Therefore, it is possible to eliminate the bias of the wall thickness. That is, once the convex flange portion 51 is formed, the convex flange portion 51 is flattened to prevent wrinkles from concentrating on the end portion of the inclined flange portion 190 due to the material flow during pressing, and the inclined flange portion Can disperse 190 wrinkles. As a result, even when drawing molding is applied to the press-molded product 100 having the bag-shaped portion 101, it is possible to suppress the concentration of wrinkles generated between the floor flange portion 140 and the side vertical flange portion 170.
[0116]
Further, according to the first embodiment, the bag-shaped portion 101 including the peripheral wall portion 120 of the press-molded product 100 is formed by drawing molding. Further, by bending molding, a convex flange portion 51 and a vertical flange portion 160 including a side vertical flange portion 170 are formed. As described above, the press-formed product 100 having the bag-shaped portion 101 and having the floor flange portion 140 and the side vertical flange portion 170 continuous, which could not be realized only by bending molding, is formed by a combination of drawing molding and bending molding. Will be realized.
[0117]
Further, according to the first embodiment, the convex flange portion 51 has a stepped shape in a side view. Since the convex flange portion 51 has a stepped shape, a sufficient line length in the side view of the convex flange portion 51 is sufficiently secured, and wrinkles are effectively dispersed during the second press molding. The first embodiment of the present disclosure has been described above.
[0118]

Subsequently, some modifications of the first embodiment of the present disclosure will be described with reference to FIGS. 18 and 19. In some modifications, the shape of the convex flange portion 51 of the intermediate molded product 50 is different from that of the above embodiment. FIG. 18 is a side view of the intermediate molded product 50 according to one modification. As shown in FIG. 18, in this modification, the convex flange portion 51 has an arc shape in a side view (Y direction view in FIG. 18). This facilitates the formation of the convex flange portion 51 in the first press molding and secures the effect of suppressing the concentration of wrinkles.
[0119]
Further, FIG. 19 is a side view of the intermediate molded product 50 according to another modified example. As shown in FIG. 19, in this modification, the convex flange portion 51 is It has multiple step shapes when viewed from the side. As a result, the line length of the convex flange portion 51 in the side view is secured longer, and wrinkles are more effectively dispersed. Further, by adjusting the number of step shapes, it becomes easy to cope with a change in the distance between the floor flange portion 140 and the side vertical flange portion 170. In the above-mentioned modification, the configuration other than the shape of the convex flange portion 51 is the same as that of the above embodiment, and thus the description thereof will be omitted.
[0120]

Subsequently, some modifications of the first embodiment of the present disclosure will be described with reference to FIGS. 20 to 22. In some modifications, the shape of the press-molded product 100 is different from that of the above embodiment. FIG. 20 is a perspective view of the press-molded product 100A according to one modification. As shown in FIG. 20, in the press-molded product 100A of the present modification, the central vertical wall portion 121A is formed in the peripheral wall portion 120 in an arc shape in a plan view (Z direction view shown in FIG. 20). As a result, the bag-shaped portion 101 can be easily molded. In addition, it is possible to suppress interference between the press-molded product 100A and peripheral parts.
[0121]
Further, FIG. 21 is a perspective view of the press-molded product 100B according to another modified example. As shown in FIG. 21, the press-molded product 100B of this modification has a shape in which a part of the vertical flange portion is cut off. Specifically, the press-molded product 100B does not have the ridgeline vertical flange portion 181 and the vertical flange corner portion 185, and is discontinuous at the relevant portions. This facilitates the molding of the central vertical flange portion 180 and the side vertical flange portion 170.
[0122]
Further, FIG. 22 is a perspective view of the press-molded product 100C according to another modification. As shown in FIG. 22, in the press-molded product 100C of this modification, the inclined flange portion 190 and the vertical flange portion 160 including the side vertical flange portion 170 are integrally formed. By integrating the inclined flange portion 190 and the side vertical flange portion 170, the load transmission capacity of the press-molded product 100 when the vertical flange portion 160 is fully fastened to another member (not shown) is further improved. In addition, wrinkles can be dispersed in the inclined flange portion 190, and the concentration of wrinkles is further suppressed. In the above-mentioned modification, the configurations other than the shapes of the press-molded products 100A, 100B, and 100C are common to the above-described embodiment, and thus the description thereof will be omitted.
Example 1
[0123]
In order to confirm the effects of the manufacturing method, the press-molded product 100 and the press-molding apparatus according to the present disclosure, a characteristic evaluation regarding suppression of the influence of wrinkles of the press-molded product 100 molded by applying the manufacturing method according to the first embodiment. Was done.
[0124]
Specifically, a simulation calculation was performed assuming the manufacturing method according to the first embodiment, and the wrinkle generation was used as a guideline based on the plate thickness reduction rate (plate reduction rate) in the model shape of the calculation result. The simulation conditions were press molding using a steel plate having a tensile strength of 440 MPa and a plate thickness of about 2.3 mm.
[0125]
The simulation results will be described with reference to FIGS. 23 to 25. FIG. 23 is a diagram showing the simulation results of Comparative Example 1. Comparative Example 1 is a result of forming an inclined wall on a continuous flange in one step in press molding. Specifically, this is a case where the flat blank 1 is press-molded using a die corresponding to the second die 300 according to the first embodiment. As shown in FIG. 23, in the press-molded product 600 according to Comparative Example 1, deformation such as entrainment of a plate material occurred at the end portion of the inclined flange portion 690.
[0126]
FIG. 24 is a diagram showing the simulation results of Comparative Example 2. Comparative Example 2 is a result of forming a sloping wall instead of a convex shape in the first step and further forming a sloping wall on the continuous flange in the second step, although the press molding is performed in two steps in the press molding. .. Specifically, a mold corresponding to the first mold 200 according to the first embodiment, in which only the convex flange forming portion of the first punch 250 is a slope instead of a step is used, and further, a second mold is used. This is the case of press molding with a die corresponding to 300. As shown in FIG. 24, in the press-molded product 700 according to Comparative Example 2, there is a portion in the inclined flange portion 790 where the plate thickness is greatly increased although the deformation is not caused as in Comparative Example 1. Large wrinkles occurred.
[0127]
FIG. 25 is a diagram showing the simulation results of the examples. As shown in FIG. 25, in the press-molded product 100 according to the embodiment, in the inclined flange portion 190, no portion where the plate thickness reduction rate was significantly changed was observed, and wrinkles were dispersed. That is, according to this example, it was shown that the concentration of wrinkles was suppressed.
[0128]
[Second embodiment]
Next, a preferred second embodiment of the present disclosure will be described in detail. The second embodiment is modified from the first embodiment as follows.
[0129]
(Changes in intermediate molded products)
In the second embodiment, the configuration of the intermediate molded product is different from that in the first embodiment. That is, as shown in FIG. 26A, the intermediate molded product 50 has a shape including a portion 57 corresponding to the bag-shaped portion 101 of the press molded product 100 and a convex flange portion 51. The convex flange portion 51 is continuous via a portion 58 that becomes the side vertical flange portion 170, a portion 59 that becomes the floor flange portion 140, and a first preliminary ridge line 53 and a second preliminary ridge line 55, which will be described later. In particular, the convex flange portion 51 is continuous with the portion that becomes the side floor flange portion 143 via the second preliminary ridge line 55. The convex flange portion 51 is formed as an inclined flange portion 190 of the press-molded product 100, as will be described later.
[0130]
As shown in FIG. 26A, the intermediate molded product 50 has a first preliminary ridge line 53 between the convex flange portion 51 and the portion 58 that becomes the side vertical flange portion 170. The first preliminary ridge line 53 is an R-shaped portion having a predetermined radius of curvature that connects the convex flange portion 51 and the side vertical flange portion 170. Further, the intermediate molded product 50 has a second preliminary ridge line 55 between the convex flange portion 51 and the portion 59 that becomes the floor flange portion 140. In particular, the second preliminary ridge line 55 is formed between the convex flange portion 51 and the portion that becomes the side floor flange portion 143. The second preliminary ridge line 55 is an R-shaped portion having a predetermined radius of curvature that connects the convex flange portion 51 and the floor flange portion 140.
[0131]
Further, as shown in FIG. 26B, in the convex flange portion 51, the portion 51A corresponding to the upper flange ridge line portion 194 of the press-molded product 100 has a flat shape. Further, in the convex flange portion 51, the portion 51B corresponding to the lower flange ridge line portion 192 of the press-molded product 100 has a flat shape.
[0132]
Specifically, the stepped flat portion of the convex flange portion 51 is not preprocessed. As a result, in the convex flange portion 51, the portion 51A corresponding to the upper flange ridgeline portion 194 or the portion 51B corresponding to the lower flange ridgeline portion 192 has a flat shape. Since the pre-processing is not performed, when the intermediate molded product 50 is molded as the press-molded product 100, the formability of the upper flange ridge line portion 194 and the lower flange ridge line portion 192 is improved.
[0133]
Details will be described later, but the intermediate molded product 50 is further press-molded to flatten the convex flange portion 51. Further, the first preliminary ridge line 53 or the second preliminary ridge line 55 is bent and formed as a part of the side vertical flange portion 170 or a part of the side floor flange portion and 143. As a result, the press-molded product 100 having the inclined flange portion 190 is molded.
[0134]
<2. Mold changes>
In the second embodiment, the basic configuration of the mold shown in FIGS. 27 and 28 is the same as that of the first embodiment. However, in the second embodiment, the configuration of the first mold 200 is different from that of the first embodiment in that the above-mentioned intermediate molded product 50 can be manufactured. Further, in the second embodiment, the configuration of the second mold 300 is different from that of the first embodiment in that the press-molded product 100 can be manufactured from the above-mentioned intermediate molded product 50.
[0135]
That is, although the manufacturing method of the press-molded product 100 will be described in detail later, the portion 58 and the floor that become the side vertical flange portion 170 with respect to the blank 1 by the first press molding (pre-molding) using the first mold 200. An intermediate molded product 50 having a convex flange portion 51 is formed between the portion 59 to be the flange portion 140. Further, by the second press molding using the second mold 300, the press-molded product 100 having the inclined flange portion 190 is formed by flattening the convex flange portion 51.
[0136]
The second die slope portion 315 of the second die presses the convex flange portion 51 of the intermediate molded product 50 from the upper surface to form the inclined flange portion 190 on the press molded product 100. Further, in the second die slope portion 315 of the second mold, the first preliminary ridge line 53 and the second preliminary ridge line 55 are bent to form a part of the side floor flange portion 143 and a part of the side vertical flange portion 170. do. The second die slope portion 315 is an inclined wall provided on both sides of the second die peripheral wall holding portion 313 in the Y direction and erected from the second die flat surface portion 311. The second die vertical flange forming portion 317 is a wall surface erected from the second die slope portion 315, and is a vertical flange including the side vertical flange portion 170 of the press-molded product 100 with the second cam 370 described later. The portion 160 is formed.
[0137]
The second punch 330 of the second mold abuts on one surface of the intermediate molded product 50 from the Z direction in FIG. For example, when the second mold 300 moves relative to the vertical direction, the second punch 330 comes into contact with the lower surface of the intermediate molded product 50. The second punch 330 is provided on one surface side of the convex flange portion 51 of the intermediate molded product 50, and the inclined flange portion 190 is bent and molded by sandwiching the convex flange portion 51 with the second die 310. .. Further, the second punch 330 forms the inclined flange portion 190 and bends the first preliminary ridge line 53 and the second preliminary ridge line 55 with the second die 310 to partially and the side of the side vertical flange portion 170. A part of the floor flange portion 143 is formed.
[0138]
<3. Changes in manufacturing method>
In the second embodiment, the basic process of the manufacturing method is the same as that in the first embodiment (see FIGS. 2 and 3). However, in the second embodiment, the first press molding is different from the first embodiment in that the above-mentioned intermediate molded product 50 can be manufactured. Further, in the second embodiment, the second press molding is different from the first embodiment in that the press molded product 100 can be manufactured from the above-mentioned intermediate molded product 50.
[0139]
(1st press molding (preliminary molding))
Specifically, as shown in FIG. 29B, first, the blank 1 is sandwiched between the first holder 210 and the first die 230. Here, as shown in FIG. 29A, the blank 1 is a plate material having a substantially circular shape in a plan view (Z direction view in FIG. 4A), and the longest length in the X direction is about 170 mm in the Y direction. The longest length is about 200 mm. The first holder 210 and the first die 230 sandwich a portion corresponding to the floor flange portion 140 of the press-molded product 100 in the blank 1. Specifically, the outer peripheral edge portion of the blank 1 is sandwiched between the holder flat surface portion 211 and the first die flat surface portion 231.
[0140]
Next, as shown in FIG. 30B, the blank 1 sandwiched between the first holder 210 and the first die 230 is moved relative to the first punch 250 to form the first punch 250 and the blank 1. Abuts. Specifically, the substantially central portion of the blank 1 and the upper wall surface of the first punch peripheral wall forming portion 251 come into contact with each other. Further, as shown in FIG. 30A, the X-direction end portion 1A of the blank 1 comes into contact with the first punch vertical flange forming portion 255 and is deformed.
[0141]
Further, in the case of the embodiment in which the first mold 200 has the first pad 270, the first pad 270 comes into contact with the blank 1 prior to the draw forming. As a result, in the press-molded product 100, a part of the side top plate ridge line portion 133, which is the ridge line portion between the top plate portion 110 on the end side where the peripheral wall portion 120 is not formed and the peripheral wall portion 120, is formed. Ridge. Further, a continuous portion between the central vertical flange portion 180 and the side vertical flange portion 170 of the press-molded product 100 is formed. That is, in the first press molding, drawing molding The first pad 270 and the first punch 250 form a part of the side top plate ridge line portion 133, the central vertical flange ridge line portion 183, and the vertical flange corner portion 185.
[0142]
Specifically, as shown in FIG. 30A, the blank 1 is sandwiched between the first pad ridge line forming portion 273 and the first punch peripheral wall forming portion 251 so that a part of the side top plate ridge line portion 133 is formed. It is formed. Further, the first pad vertical flange forming portion 275 comes into contact with the X-direction end portion 1A of the blank 1. As a result, as shown in FIG. 30B, the blank 1 is sandwiched between the first pad vertical flange forming portion 275 and the first punch vertical flange forming portion 255, and the blank 1 is partially bent and formed. The formation of the central vertical flange portion 180 and its peripheral portions is started.
[0143]
Here, the molding of the side top plate ridge line portion 133 and the central vertical flange portion 180 by the first pad 270 is the same as that of the first embodiment (see FIGS. 6A to 6D).
[0144]
Subsequently, as shown in FIG. 31A, the blank 1 sandwiched between the first holder 210 and the first die 230 is further moved relative to the first punch 250, and the peripheral wall portion 120 is drawn by drawing. It begins to form. Specifically, as shown in FIG. 31B, the substantially central portion of the blank 1 is drawn and formed while being sandwiched between the first die peripheral wall forming portion 233 and the first punch peripheral wall forming portion 251. At this time, first, the top plate ridge line portion 130 is drawn and molded. Since the top plate ridge line portion 130 is formed by drawing forming, the occurrence of wrinkles at a portion adjacent to the top plate ridge line portion 130 is suppressed. Actually, as shown in FIG. 31A, the plate thickness of the blank 1 is uniformly reduced from the top plate ridge line portion 130 to the top plate portion 110 and the peripheral wall portion 120 with the drawing forming, and wrinkles are generated. It is suppressed.
[0145]
Further, in the case of the embodiment in which the first mold 200 has the first pad 270, the first pad 270 moves relative to the first punch 250 together with the first holder 210 and the first die 230. As described with reference to FIG. 6C, the first pad ridge line forming portion 273 forms the side top plate ridge line portion 133 with the first punch 250. Further, the X-direction end portion of the blank 1 is sandwiched between the first pad vertical flange forming portion 275 and the first punch vertical flange forming portion 255 and bent to form the central vertical flange ridge line portion 183. Will be done. Further, during drawing forming by the first holder 210 and the first die 230, the first pad top plate holding portion 271 holds a substantially central portion of the blank 1 from above. Finally, the first pad top plate holding portion 271 sandwiches substantially the center of the blank 1 with the upper wall surface of the first punch peripheral wall forming portion 251.
[0146]
In the first press molding, as shown in FIGS. 32A and 32B, the blank 1 sandwiched between the first holder 210 and the first die 230 is further moved relative to the first punch 250 to further move the peripheral wall. The portion 120 is molded. Further, when the blank 1 is brought into contact with the first punch convex forming portion 253, the convex convex flange portion 51 is bent and molded. Specifically, by moving the blank 1 relative to the first punch 250, a part of the blank 1 is sandwiched between the first die convex forming portion 235 and the first punch convex forming portion 253. The convex flange portion 51 is formed by being deformed into a stepped shape. Further, the first preliminary ridge line 53 and the second preliminary ridge line 55 are formed together with the convex flange portion 51. The height of the stepped shape of the convex flange portion 51 is appropriately set to the extent that the inclined flange portion 190 can be formed based on the plate thickness and tensile strength of the blank 1.
[0147]
FIG. 33 is an explanatory diagram schematically showing the state after the completion of the first press molding. As shown in FIG. 33, after the completion of the first press molding, the blank 1 is molded into an intermediate molded product 50 including a portion 57 corresponding to the bag-shaped portion 101 and a convex flange portion 51. The intermediate molded product 50 taken out from the first mold 200 is used for the second press molding.
[0148]
In the first press molding, the angle formed by the portion corresponding to the vertical flange portion 160 including the top plate portion 110, the peripheral wall portion 120, the floor flange portion 140, or the side vertical flange portion 170 of the intermediate molded product 50 is a large obtuse angle. It may be formed so as to be. This makes it possible to alleviate the concentration of strain during molding. In this case, in the second press molding or the third press molding, molding is performed so that the angle formed by each part of the press-molded product 100 is a predetermined angle.
[0149]
(2nd press molding)
In the second press molding, the intermediate molded product 50 is placed in the second mold 300 as a preparation for the second press molding. Specifically, the intermediate molded product 50 is placed in a predetermined position of the second punch 330.
[0150]
Specifically, the inner peripheral surface of the portion corresponding to the peripheral wall portion 120 in the intermediate molded product 50 and the outer peripheral surface of the second punch peripheral wall holding portion 333 come into contact with each other. Further, the second pad top plate holding portion 351 comes into contact with the portion corresponding to the top plate portion 110 of the intermediate molded product 50. The intermediate molded product 50 is pushed down by the second pad top plate holding portion 351 and guided by the second punch peripheral wall holding portion 333 to move relative to the second punch 330.
[0151]
Next, as shown in FIGS. 34A and 34B, as a result of the intermediate molded product 50 being pushed down by the second pad top plate holding portion 351, the portion corresponding to the floor flange portion 140 of the intermediate molded product 50 is the second. 2 It comes into contact with the punch flat surface portion 331. Further, the inner peripheral surface of the bag-shaped portion 101 of the intermediate molded product 50 comes into contact with the outer peripheral surface of the second punch peripheral wall holding portion 333. As a result, the intermediate molded product 50 is held in the second mold 300. At this time, the convex flange portion 51 of the intermediate molded product 50 is located on the upper side of the second punch slope portion 335.
[0152]
As shown in FIG. 34C, the convex flange portion 51 is separated from the second punch slope portion 335. Specifically, the virtual line VL connecting the vertices of the first preliminary ridge line 53 and the second preliminary ridge line 55 of the convex flange portion 51 has an offset amount T of a predetermined distance between the first preliminary ridge line 53 and the second punch slope portion 335. ing. The offset amount T is, for example, 1 mm or more and 5 mm or less.
[0153]
By setting the offset amount T to 1 mm or more, bending of the first preliminary ridge line 53 and the second preliminary ridge line 55, which will be described later, is realized. That is, wrinkles are dispersed around the inclined flange portion 190, and the effect of suppressing wrinkles in the inclined flange portion 190 is improved. On the other hand, when the offset amount T is 5 mm or less, the workability when forming the convex flange portion 51 on the inclined flange portion 190 is improved. In other words, when the offset amount T is larger than 5 mm, when the convex flange portion 51 is formed on the inclined flange portion 190, the crushing allowance may be large and processing may be difficult, but the offset amount T is equal to or less than a predetermined value. Because it is offset, it is easy to process.
[0154]
Subsequently, as shown in FIGS. 35A and 35B, the second die 310 moves along the Z direction toward the intermediate molded product 50. The second die flat surface portion 311 sandwiches the portion 59 that becomes the floor flange portion 140 of the intermediate molded product 50 with the second punch flat surface portion 331. Further, the second die peripheral wall holding portion 313 sandwiches the portion 57 corresponding to the peripheral wall portion 120 of the intermediate molded product 50 with the second punch peripheral wall holding portion 333. The second die slope portion 315 presses the convex convex flange portion 51 between the second die slope portion 335 and the second punch slope portion 335, and bends and forms the convex shape into a flat shape. As a result, the inclined flange portion 190, which is a continuous inclined wall between the floor flange portion 140 and the side vertical flange portion 170, is formed.
[0155]
Further, when the inclined flange portion 190 is formed, as shown in FIG. 35C, the first preliminary ridge line 53 of the convex flange portion 51 is bent by the second die 310 and the second punch 330 (arrows in FIG. 35C). reference). As a result, the first preliminary ridge line 53 is formed as a part of the side vertical flange portion 170. Specifically, the first preliminary ridge line 53 is formed as one end portion (a portion on the inclined flange portion 190 side) of the side vertical flange portion 170 in the Z direction.
[0156]
Further, the second preliminary ridge line 55 of the convex flange portion 51 is bent by the second die 310 and the second punch 330 (see the arrow in FIG. 35C). As a result, the second preliminary ridge line 55 is formed as a part of the side floor flange portion 143. Specifically, the second preliminary ridge line 55 is formed as one end portion (a portion on the inclined flange portion 190 side) of the side floor flange portion 143 in the X direction.
[0157]
Here, for example, if a flat inclined wall is to be formed from the beginning without forming the convex flange portion 51, the end portion of the inclined wall (X direction when viewed from the side (Y direction)). The present inventors have found that the wall thickness is uneven (wrinkles are concentrated) at the end). It is considered that this is because when the flat shape is directly formed, the compressive strain is concentrated on the end of the inclined wall due to the material flow during press forming, and more wrinkles are formed. Therefore, as a result of diligent studies, the present inventors have found that the convex flange portion 51 is once formed and the convex flange portion 51 is crushed to disperse the wrinkles and suppress the concentration of the wrinkles. Specifically, by pressing the convex flange portion 51 of the intermediate molded product 50 to form a flat shape, the concentration of wrinkles on the inclined flange portion 190 of the press molded product 100 is suppressed. In particular, when the press-formed product 100 is made of a high-strength steel plate, the concentration of wrinkles can be suppressed by pressing the convex flange portion 51 to form the inclined flange portion 190.
[0158]
Further, as a result of diligent studies by the inventors, it corresponds to the inclined flange portion 190 as compared with the case where only the region corresponding to the inclined flange portion 190 of the press-molded product 100 is the convex flange portion 51 in the intermediate molded product 50. The inventors have found that the concentration of wrinkles can be further suppressed by processing a wider area than the area. It is considered that this is because in the dispersion of wrinkles by crushing the convex flange portion 51 as described above, the concentration of wrinkles in the inclined flange portion 190 is further suppressed by widening the dispersion range.
[0159]
The suppression of wrinkles according to the second embodiment will be described more specifically with reference to FIGS. 35D and 35E. FIG. 35D is a partially enlarged view schematically explaining the bending of the preliminary ridge line in the second press molding step as a reference example. FIG. 35E is a partially enlarged view schematically illustrating the bending of the preliminary ridge line in the second press molding step according to the first embodiment. First, as shown in FIG. 35D, it is assumed that only the region corresponding to the inclined flange portion 190 of the press-molded product 100 is the convex flange portion 51 of the intermediate molded product 50. In this case, the convex flange portion 51 is crushed and the wrinkles are dispersed in the inclined flange portion 190. On the other hand, since the convex flange portion 51 is deformed, the material flow during the deformation stays at the inclined flange portion 190.
[0160]
On the other hand, as shown in FIG. 35E, a first preliminary ridge line 53 is provided between the portion 58 that becomes the side vertical flange portion 170 and the convex flange portion 51, and the portion 59 that becomes the floor flange portion 140 and the convex flange portion 51. A second preliminary ridge line 55 is provided between them. In this case, by providing the first preliminary ridge line 53 and the second preliminary ridge line 55 on the intermediate molded product 50, a region wider than the region to be the inclined flange portion 190 is targeted for processing.
[0161]
That is, the portion 58 that becomes the side vertical flange portion 170 has a shorter line length in the side view (Y direction view) than the side vertical flange portion 170 of the press-molded product 100, and the first preliminary ridge line 53 is formed during press working. By being bent, it is formed as a side vertical flange portion 170. Further, the portion 59 that becomes the floor flange portion 140 has a shorter line length in the side view (Y direction view) than the floor flange portion 140 of the press-molded product 100, and the second preliminary ridge line 55 is bent during press working. As a result, it is formed as a floor flange portion 140. In this way, when the convex flange portion 51 is pressed, the first preliminary ridge line 53 and the second preliminary ridge line 55 are bent to form the side vertical flange portion 170 and the side floor flange portion 143. This expands the range of processing, so it is the inclined flange part 190.Not only that, the wrinkle dispersion range will be expanded to the surrounding areas. As a result, wrinkles in the inclined flange portion 190 of the press-molded product 100 are further suppressed.
[0162]
Subsequently, as shown in FIGS. 36A and 36B, the second cam 370 moves along the X direction and abuts on the vertical flange portion of the intermediate molded product 50. That is, the second cam 370 sandwiches the portion corresponding to the vertical flange portion 160 of the intermediate molded product 50 with the second punch vertical flange forming portion 337. The first press molding and the second press molding in the method for manufacturing the press molded product 100 according to the second embodiment have been described above. The method for manufacturing the press-molded product 100 according to the second embodiment may include various additional steps necessary for manufacturing the press-molded product 100, in addition to the first press molding and the second press molding.
[0163]
The second embodiment will be supplemented as follows with reference to FIG. 37.
In the second embodiment, the first punch 250 abuts on the region of one surface of the blank 1 to be the inclined flange portion 190, and bends and forms the convex flange portion 51 with respect to the blank 1 together with the first die 230. The 1-punch convex forming portion 253 abuts on the region serving as the side vertical flange portion 170 on one surface of the blank 1, and together with the first die 230, the inclined flange portion 190 side of the side vertical flange portion 170 with respect to the blank 1 The first punch vertical flange forming portion 255 for bending and forming at least the side vertical flange main body portion 170B located on the side opposite to the inclined flange portion 190 from the end portion 170A, and the floor flange portion 140 on one surface of the blank 1. At least the floor flange main body 140B located on the side opposite to the inclined flange 190 from the end 140A on the inclined flange 190 side of the floor flange 140 with respect to the blank 1 together with the first die 230 in contact with the region. It has a first punch floor flange forming portion 257 to be bent and molded.
[0164]
Further, in the second embodiment, the first punch vertical flange forming portion 255 is the first spare that connects the side vertical flange main body portion 170B, the side vertical flange main body portion 170B, and the convex flange portion 51 among the side vertical flange portions 170. It has a shape in which the ridge line 53 is bent and molded into the blank 1. Further, the first punch floor flange forming portion 257 bends and forms the second preliminary ridge line 55 connecting the floor flange main body portion 140B, the floor flange main body portion 140B, and the convex flange portion 51 of the floor flange portion 140 into the blank 1. Has a shape.
[0165]
The second die 310 includes a slope 312 that abuts on the other surface of the convex flange portion 51. The second punch 330 is provided on one surface side of the convex flange portion 51, and by sandwiching the convex flange portion 51 with the second die 310, the inclined flange portion 190 is bent and formed from the convex flange portion 51. It has a second punch slope portion 335. Further, the second punch 330 has a first bending forming portion 341 that bends and forms the first preliminary ridge line 53 into a part of the side vertical flange portion 170 with the second die 310, and a second spare with the second die 310. It has at least one of the second bending forming portions 342 that bends and forms the ridge line 55 into a part of the floor flange portion 140. The second punch 330 may have both a first bending forming portion 341 and a second bending forming portion 342.
[0166]
Then, in the second embodiment, in the first press molding, the blank 1 comes into contact with the first punch convex forming portion 253 provided on the first punch 250, so that the convex convex shape formed on the inclined flange portion 190 is formed. By bending the flange portion 51 into the blank 1 and contacting the blank 1 with the first punch 250, the side of the side vertical flange portion 170 is on the opposite side of the inclined flange portion 190 from the end portion 170A on the inclined flange portion 190 side. The side vertical flange main body 170B located on the side and the floor flange main body 140B located on the side opposite to the inclined flange 190 from the end 140A on the inclined flange 190 side of the floor flange 140 are bent to at least blank 1. By performing processing including molding on the blank 1, the intermediate molded product 50 is formed from the blank 1.
[0167]
In this first press molding, the blank 1 comes into contact with the first punch 250 to connect the side vertical flange main body 170B, the side vertical flange main body 170B, and the convex flange 51 among the side vertical flange portions 170. 1 The preliminary ridge line 53, the floor flange main body portion 140B of the floor flange portion 140, and the second preliminary ridge line 55 connecting the floor flange main body portion 140B and the convex flange portion 51 are bent and molded into the blank 1.
[0168]
Further, in the second embodiment, in the second press molding, the intermediate molded product 50 is bent by the second die 310 and the second punch 330 so that the first preliminary ridge line 53 is a part of the side vertical flange portion 170. It includes performing at least one of molding and bending molding in which the second preliminary ridge line 55 is a part of the floor flange portion 140. The second press forming is performed by bending the intermediate molded product 50 with the second die 310 and the second punch 330 so that the first preliminary ridge line 53 is a part of the side vertical flange portion 170, and the second preliminary ridge line 55. You may perform both bending molding which makes a part of the floor flange portion 140. Further, the second press molding includes bending the convex flange portion 51 into the inclined flange portion 190 with the second die 310 and the second punch 330 with respect to the intermediate molded product 50.
[0169]
The press-molded product 100 has an upper flange ridge line portion 194 formed between the inclined flange portion 190 and the side vertical flange portion 170, and a lower flange formed between the inclined flange portion 190 and the floor flange portion 140. When the ridge line portion 192 is included, in the first press molding, at least one of the portion of the convex flange portion 51 that becomes the upper flange ridge line portion 194 or the lower flange ridge line portion 192 may have a flat shape.
[0170]
(Action effect)
According to the second embodiment, in the press-molded product 100, the floor flange portion 140 and the side vertical flange portion 170 are continuous by the inclined flange portion 190. Further, the floor flange portion 140 and the side vertical flange portion 170 extend from the bag-shaped portion 101 and are continuous. As a result, the rigidity of the press-molded product 100 is improved, the resistance to twisting and crushing is increased, and the load transmission capacity is also improved.
[0171]
Further, according to the second embodiment, the intermediate molded product 50 having the convex flange portion 51 formed at the continuous portion between the floor flange portion 140 and the side vertical flange portion 170 in the press molded product 100 is used. Since the inclined flange portion 190 is formed, it is possible to eliminate the unevenness of the wall thickness. That is, by flattening the convex shape of the intermediate molded product 50 once formed into a convex shape, it is possible to prevent wrinkles from concentrating on the inclined flange portion 190 due to the material flow during pressing, and the inclined flange portion 190. Can disperse wrinkles. As a result, even when drawing molding is applied to the press-molded product 100 having the bag-shaped portion 101, it is possible to suppress the concentration of wrinkles generated between the floor flange portion 140 and the side vertical flange portion 170.
[0172]
Further, the first preliminary ridge line 53 and the second preliminary ridge line 55 of the intermediate molded product 50 are bent and formed as a part of the side vertical flange portion 170 and a part of the side floor flange portion 143, respectively. As a result, the range in which the wrinkles are dispersed is widened from the inclined flange portion 190, and the wrinkles generated in the inclined flange portion 190 are further suppressed. Further, since the effect of suppressing wrinkles in the inclined flange portion 190 is ensured, the line length of the inclined flange portion 190 can be shortened, and the load transmission capacity of the press-molded product 100 is further improved.
[0173]
Further, when the press-molded product 100 in which the length L of the inclined flange portion 190 is relatively small with respect to the height H of the press-molded product 100 is manufactured by the manufacturing method described in the second embodiment, the offset amount T (FIG. (See 34C.) Can be set relatively large, and the region between the first preliminary ridge line 53 and the second preliminary ridge line 55 of the convex flange portion 51 can be set wider than the region of the inclined flange portion 190. .. Therefore, the wrinkles generated by the molding of the inclined flange portion 190 can be dispersed in a wide area, and the wrinkle dispersion effect becomes remarkable. Therefore, the smaller the length L of the inclined flange portion 190 with respect to the height H, the superiority of the method for manufacturing the press-molded product according to the second embodiment to the method for manufacturing the press-molded product according to the first embodiment. improves.
[0174]
Further, according to the second embodiment, the bag-shaped portion 101 including the peripheral wall portion 120 of the press-molded product 100 is formed by drawing molding. Further, by bending molding, a convex flange portion 51 and a vertical flange portion 160 including a side vertical flange portion 170 are formed. As described above, the press-formed product 100 having the bag-shaped portion 101 and having the floor flange portion 140 and the side vertical flange portion 170 continuous, which could not be realized only by bending molding, is formed by a combination of drawing molding and bending molding. Will be realized.
[0175]
Further, according to the second embodiment, the convex flange portion 51 has a stepped shape in a side view. Since the convex flange portion 51 has a stepped shape, a sufficient line length in the side view of the convex flange portion 51 is sufficiently secured, and wrinkles are effectively dispersed during the second press molding.
[0176]
In the second embodiment, the intermediate molded product 50 is provided with both the first preliminary ridge line 53 and the second preliminary ridge line 55, and the first preliminary ridge line 53 and the second preliminary ridge line 55 are provided with the side vertical flange portion 170 and the second preliminary ridge line 55, respectively. Although an example of forming as a side floor flange portion 143 is shown, the present invention is not limited thereto. For example, the intermediate molded product 50 is provided with either the first preliminary ridge line 53 or the second preliminary ridge line 55, and either the first preliminary ridge line 53 or the second preliminary ridge line 55 is provided with the side vertical flange portion 170 and the second preliminary ridge line 55, respectively. It may be formed as a side floor flange portion 143. The embodiment of the present invention has been described above.
Example 2
[0177]
In order to confirm the effects of the manufacturing method, the press-molded product 100 and the press-molding apparatus according to the present invention, the characteristic evaluation regarding the suppression of the influence of wrinkles of the press-molded product 100 molded by applying the manufacturing method according to the second embodiment. Was done.
[0178]
Specifically, a simulation calculation was performed assuming the manufacturing method according to the second embodiment, and the wrinkle generation was used as a guideline based on the plate thickness reduction rate (plate reduction rate) in the model shape of the calculation result. The simulation conditions were press molding using a steel plate having a tensile strength of 440 MPa and a plate thickness of about 2.3 mm.
[0179]
FIG. 38 is a diagram showing the simulation results of the examples. As shown in FIG. 38, no portion where the plate thickness reduction rate was significantly changed was observed, and wrinkles were dispersed. That is, according to this example, it was shown that the concentration of wrinkles was suppressed. Further, it was shown that the region where the plate thickness reduction rate was equal to or less than the predetermined value was wider than that of the reference example, and the concentration of wrinkles was further suppressed.
[0180]
Although the preferred embodiments of the present disclosure have been described in detail with reference to the accompanying drawings, the present disclosure is not limited to such embodiments. It is clear that anyone with ordinary knowledge in the field of technology to which this disclosure belongs can come up with various modifications or applications within the scope of the technical ideas described in the claims. , These are also naturally understood to belong to the technical scope of the present disclosure.
[0181]
For example, in the above embodiment, an example in which the top plate portion 110, the peripheral wall portion 120, the floor flange portion 140, and the like are orthogonal to each other is shown, but the present disclosure is not limited to such an example. The extending direction of each adjacent portion is not limited to the orthogonal direction, and is appropriately set according to the strength and rigidity required for the press-molded product 100.
[0182]
Further, in the above embodiment, an example in which the top plate portion 110, the peripheral wall portion 120, the floor flange portion 140, and the like have a planar shape is shown, but the present disclosure is not limited to such an example. For example, the portion may have a partial unevenness or a curved surface, or may have a partial opening.
[0183]
Further, in the above embodiment, the press-molded product 100 has an example having a ridge line portion and a corner portion, but the present disclosure is not limited to such an example. For example, between the top plate portion 110 and the peripheral wall portion 120, the sky The plate ridge line portion 130 may not be formed, and the top plate portion 110 and the peripheral wall portion 120 may be directly connected to each other.
[0184]
The disclosures of Japanese Patent Application No. 2019-143704 and Japanese Patent Application No. 2019-230803 are incorporated herein by reference in their entirety.
Code description
[0185]
1 Blank (metal plate)
50 Intermediate molded product
51 Convex flange part
53 First preliminary ridgeline
55 Second preliminary ridgeline
100 Press-molded product
101 Bag-shaped part
110 Top plate
120 Peripheral wall
130 Top plate ridgeline
133 Side top plate ridgeline
140 Floor flange
143 Side floor flange
150 Floor flange ridgeline
160 Vertical flange part
170 side vertical flange part
180 Central vertical flange
190 Inclined flange
200 1st mold
210 holder
230 1st die
250 1st punch
253 First punch convex forming part (convex part)
270 1st pad
300 2nd mold
310 2nd die
315 2nd die slope (slope)
330 Second punch
350 2nd pad
370 2nd cam
500 press molding equipment
The scope of the claims
[Claim 1]
With the top plate
A peripheral wall portion formed along the three peripheral edges of the top plate portion and extending from the peripheral edge portion in a direction intersecting the extending direction of the top plate portion.
A floor flange portion extending outward from an end opposite to the end continuous with the top plate portion of the peripheral wall portion in a direction intersecting the extending direction of the peripheral wall portion.
The side vertical flange portion extending outward from the peripheral end of the peripheral wall portion and
The inclined flange portion, which is a continuous inclined wall between the vertical flange portion on the side and the floor flange portion,
It is a method of manufacturing a press-molded product including the first press molding and the second press molding.
The first press molding is
With the portion of the metal plate sandwiched between the first holder and the first die to be the floor flange portion, the metal plate sandwiched between the first holder and the first die is held against the first punch. By moving relative to each other, the peripheral wall portion is drawn and formed on the metal plate.
When the metal plate comes into contact with the first punch convex forming portion provided on the first punch, the convex convex flange portion formed on the inclined flange portion is bent and molded into the metal plate.
When the metal plate comes into contact with the first punch, the side vertical flange main body portion located on the side opposite to the inclined flange portion from the end portion on the inclined flange portion side of the side vertical flange portion, and the floor. Of the flange portions, the floor flange main body portion located on the side opposite to the inclined flange portion from the end portion on the inclined flange portion side is bent and molded into at least the metal plate.
By applying processing including the above to the metal plate, an intermediate molded product is formed from the metal plate.
The second press molding is
Includes bending and molding the convex flange portion into the inclined flange portion with the second die and the second punch with respect to the intermediate molded product.
Manufacturing method for press-molded products.
[Claim 2]
The press-molded product is
It extends from the end of the top plate portion where the peripheral wall portion is not formed, in a direction intersecting the extending direction of the top plate portion and opposite to the extending direction of the peripheral wall portion. Further includes a central vertical flange portion continuous with the side vertical flange portion.
In the first press molding, before the drawing molding is performed,
The first pad and the first punch are used on the metal plate, the ridgeline portion between the top plate portion and the peripheral wall portion on the end side where the peripheral wall portion is not formed, the central vertical flange portion, and the said. Forming a continuous part between the side vertical flanges,
The method for manufacturing a press-molded product according to claim 1.
[Claim 3]
The first press molding includes bending and molding the convex flange portion having at least one step shape in a side view after the first press molding into the metal plate.
The method for manufacturing a press-molded product according to claim 1 or 2.
[Claim 4]
The first press molding is
The metal plate comes into contact with the first punch, so that the side vertical flange portion and the floor flange portion are bent and molded into the metal plate.
The method for manufacturing a press-molded product according to any one of claims 1 to 3.
[Claim 5]
The first press molding is
When the metal plate comes into contact with the first punch, the first preliminary ridge line connecting the side vertical flange main body portion, the side vertical flange main body portion, and the convex flange portion among the side vertical flange portions, and the said. Among the floor flange portions, the floor flange main body portion and the second preliminary ridge line connecting the floor flange main body portion and the convex flange portion are bent and molded into the metal plate.
The second press molding is
With respect to the intermediate molded product, the second die and the second punch are used for bending molding in which the first preliminary ridge line is a part of the side vertical flange portion, and the second preliminary ridge line is used in the floor flange portion. Including performing at least one of the bending moldings to be part of,
The method for manufacturing a press-molded product according to any one of claims 1 to 3.
[Claim 6]
The second press molding is
With the second die and the second punch, the first preliminary ridge line is bent and molded into a part of the side vertical flange portion, and the second preliminary ridge line is bent and molded into a part of the floor flange portion. include,
The method for manufacturing a press-molded product according to claim 5.
[Claim 7]
The press-molded product includes an upper flange ridge line portion formed between the inclined flange portion and the side vertical flange portion, and a lower flange ridge line portion formed between the inclined flange portion and the floor flange portion. Including
In the first press molding, at least one of the portion of the convex flange portion that becomes the upper flange ridgeline portion and the portion that becomes the lower flange ridgeline portion is made into a flat shape.
The method for manufacturing a press-molded product according to claim 5 or 6.
[Claim 8]
With the top plate
A peripheral wall portion formed along the three peripheral edges of the top plate portion and extending from the peripheral edge portion in a direction intersecting the extending direction of the top plate portion.
A floor flange portion extending outward from an end opposite to the end continuous with the top plate portion of the peripheral wall portion in a direction intersecting the extending direction of the peripheral wall portion.
The side vertical flange portion extending outward from the peripheral end of the peripheral wall portion and
The inclined flange portion, which is a continuous inclined wall between the vertical flange portion on the side and the floor flange portion,
Press-molded products including.
[Claim 9]
The flange formed around the press-molded product, including the floor flange portion, the side vertical flange portion, and the inclined flange portion, is continuous over the entire circumference of the press-molded product.
The press-molded product according to claim 8.
[Claim 10]
The line length of the inclined flange portion when viewed from the side is 10% or more and 70% or less of the distance between the top plate portion and the floor flange portion.
The press-molded product according to claim 8 or 9.
[Claim 11]
With the top plate
A peripheral wall portion formed along the three peripheral edges of the top plate portion and extending from the peripheral edge portion in a direction intersecting the extending direction of the top plate portion.
A floor flange portion extending outward from an end opposite to the end continuous with the top plate portion of the peripheral wall portion in a direction intersecting the extending direction of the peripheral wall portion.
The side vertical flange portion extending outward from the peripheral end of the peripheral wall portion and
The inclined flange portion, which is a continuous inclined wall between the vertical flange portion on the side and the floor flange portion,
A press-molding device for obtaining press-molded products, including
The first holder having a portion of one surface of the metal plate that abuts on the area to be the floor flange portion,
The portion of the other surface of the metal plate that abuts on the floor flange portion, the portion that sandwiches the metal plate between the first holder, and the region that serves as the peripheral wall portion of the metal plate. The first die with the contacting part and
The first punch and
Including
The first punch is
A first punch peripheral wall forming portion that abuts on a region of the one surface of the metal plate to be the peripheral wall portion and draws and forms the peripheral wall portion with respect to the metal plate together with the first die.
A first punch convex forming portion that abuts on the region of the one surface of the metal plate to be the inclined flange portion and bends and forms the convex flange portion with respect to the metal plate together with the first die.
In contact with the region of the one surface of the metal plate to be the side vertical flange portion, together with the first die, the side vertical flange portion of the side vertical flange portion with respect to the metal plate is more than the end portion on the inclined flange portion side. A first punch vertical flange forming portion for at least bending and forming a side vertical flange main body located on the opposite side of the inclined flange portion,
In contact with the area of ​​the one surface of the metal plate to be the floor flange portion, the first die and the metal plate are tilted from the end portion of the floor flange portion on the inclined flange portion side. It has a first punched floor flange forming portion that at least bends and forms the floor flange main body portion located on the opposite side of the flange portion.
The press molding device is
A second die including a slope that abuts on the other surface of the convex flange portion, and
The second punch and
Including more
The second punch is provided on the one surface side of the convex flange portion, and by sandwiching the convex flange portion with the second die, the inclined flange portion is bent and formed from the convex flange portion. Has a second punch slope
Press molding equipment.
[Claim 12]
The first punch vertical flange forming portion has a shape in which the side vertical flange portion is bent and molded.
The first punch floor flange forming portion has a shape in which the floor flange portion is bent and molded.
The press molding apparatus according to claim 11.
[Claim 13]
The first punch vertical flange forming portion is formed by bending a first preliminary ridge line connecting the side vertical flange main body portion, the side vertical flange main body portion, and the convex flange portion among the side vertical flange portions into the metal plate. Has a shape to
The first punch floor flange forming portion has a shape in which a second preliminary ridge line connecting the floor flange main body portion, the floor flange main body portion, and the convex flange portion of the floor flange portion is bent and molded into the metal plate. Have and
The second punch has a first bending forming portion that bends and forms the first preliminary ridge line to a part of the side vertical flange portion with the second die, and the second preliminary ridge line with the second die. It has at least one of the second bending molding portions to be bent and molded into a part of the floor flange portion.
The press molding apparatus according to claim 11.