Title of invention: Manufacturing method and manufacturing equipment for press-molded products
Technical field
[0001]
　The present invention relates to a method for manufacturing a press-molded product and a manufacturing facility.
　The present application claims priority based on Japanese Patent Application No. 2018-124149 filed in Japan on June 29, 2018, the contents of which are incorporated herein by reference.
Background technology
[0002]
　Automobile bodies are required to ensure collision performance, and improvements in body structure are being promoted for the purpose of improving collision performance. Along with this, the shapes of the parts constituting the automobile body have become complicated, and the difficulty of molding the parts has become high. In particular, in recent years, in order to achieve both improvement in collision performance and weight reduction, high-tensile material (High Tensile Strength Steel Material) is often used as a material, and the difficulty of molding a member is increasing. On the other hand, improvements in molding technology for manufacturing such members with high molding difficulty are also progressing. Patent Document 1 discloses a method of press molding an L-shaped or T-shaped part having a curved portion. Patent Document 2 discloses a press molding method for an L-shaped product having a curved portion.
Prior art literature
Patent documents
[0003]
Patent Document 1: International Publication No. 2014/185428
Patent Document 2: International Publication No. 2012/070623
Outline of the invention
Problems to be solved by the invention
[0004]
　The L-shaped and T-shaped parts obtained by press molding have a top plate portion, a vertical wall portion, and a flange portion. For example, a press-molded product such as a center pillar outer is a component in which the product height from the flange portion to the top plate portion gradually changes as it approaches the end portion on the mounting side of the side sill. Such parts are difficult to mold and are prone to wrinkles on the top plate and pattern residue on the vertical wall (traces of bending points remaining during repeated bending), but wrinkles and pattern residue are likely to occur. If a large amount of creases occur, the appearance quality will deteriorate. Therefore, in order to further improve the appearance quality, it is necessary to stably suppress the occurrence of wrinkles and pattern residues.
[0005]
　The present invention has been made in view of the above circumstances, and an object of the present invention is to improve the appearance quality of a press-molded product.
Means to solve problems
[0006]
(1) In the method for producing a press-molded article according to one aspect of the present invention, a portion extending in the first direction and the second direction, and a portion extending in the first direction and a portion extending in the second direction are curved portions. It has a top plate portion connected via a top plate portion, a vertical wall portion connected to the top plate portion, and a flange portion connected to the vertical wall portion, and an arbitrary position in the first direction is set as a first molding position and a first molding. Assuming that the position on the curved portion side of the position is referred to as the second molding position, the height from the flange portion to the top plate portion from the first molding position to the second molding position is the first product height. H 1 from the height H second product 2 varies to a method for producing a press-molded article, which corresponds to a portion corresponding to the top plate portion of the intermediate product intermediate top panel section, the vertical wall portion in the intermediate product The portion is referred to as an intermediate vertical wall portion, the portion corresponding to the flange portion in the intermediate product is referred to as an intermediate flange portion, and the line length of the intermediate vertical wall portion at the first molding position in the cross section perpendicular to the first direction is the first. Intermediate vertical wall line length d 1 , the line length of the cross section perpendicular to the first direction of the intermediate vertical wall portion at the second molding position is the second intermediate vertical wall line length d 2 , intermediate at the first molding position. The height from the flange portion to the intermediate top plate portion is the first molding height h 1 , and the height from the intermediate flange portion to the intermediate top plate portion at the second molding position is the second molding height h 2 , the second molding height . The line length of the vertical wall portion at the molding position 1 that is perpendicular to the first direction is the first vertical wall line length D 1 , and the vertical wall portion at the second molding position is perpendicular to the first direction. The line length of the cross section is the second vertical wall line length D 2By processing the blank, the first intermediate vertical wall line length d 1 / first vertical wall line length D 1 : 0.80 to 1.20, the second intermediate vertical wall line length d 2 / Second vertical wall line length D 2 : 0.80 to 1.20, second molding height h 2 / first molding height h 1 : 0.80 to 1.20, intermediate It is characterized by having a first step of manufacturing a product and a second step of manufacturing a press-molded product by processing an intermediate product.
(2) In the method for producing a press-molded product according to (1) above, the blank may be a steel plate having a tensile strength of 590 MPa or more.
[0007]
(3) The press-molded product manufacturing equipment according to another aspect of the present invention is a press-molded product manufacturing equipment having a top plate portion, a vertical wall portion connected to the top plate portion, and a flange portion connected to the vertical wall portion. A first mold for molding from a blank to an intermediate product and a second mold for molding from an intermediate product to a press-molded product are provided, and the second mold is a first mold. The top plate molding portion, which is a portion for molding the top plate portion, in which the portion extending in the first direction and the portion extending in the first direction and the portion extending in the second direction are connected via a curved portion. It has a vertical wall forming portion which is a portion for forming a vertical wall portion and a flange forming portion which is a portion for forming a flange portion, and an arbitrary position in a first direction is set as a first forming position. Assuming that the position on the curved portion side from the first molding position is referred to as the second molding position, the height from the flange molding portion to the top plate molding portion increases from the first molding position to the second molding position. It changes from the first product height H 1'to the second product height H 2 ', and the part corresponding to the top plate part in the intermediate product is the intermediate top plate part, and the part corresponding to the vertical wall part in the intermediate product is Assuming that the intermediate vertical wall portion and the portion corresponding to the flange portion in the intermediate product are referred to as the intermediate flange portion, the first mold is intermediate between the intermediate top plate molding portion, which is the portion for molding the intermediate top plate portion, and the intermediate top plate molding portion. The intermediate vertical wall forming portion, which is a portion for forming the vertical wall portion, and the intermediate flange forming portion, which is a portion for forming the intermediate flange portion, are provided, and the intermediate vertical wall forming portion at the first molding position has. The line length of the cross section perpendicular to the first direction is the first intermediate vertical wall line length d 1 ', and the line length of the intermediate vertical wall molding portion at the second molding position is the line length of the cross section perpendicular to the first direction. The intermediate vertical wall line length d 2'of 2 , the height from the intermediate flange forming portion to the intermediate top plate forming portion at the first forming position is the first forming height h. 1 ', the height from the intermediate flange molding portion to the intermediate top plate molding portion at the second molding position is the second molding height h 2 ', the first direction of the vertical wall molding portion at the first molding position. The line length of the cross section perpendicular to the first vertical wall line length D 1 ', and the line length of the vertical wall forming portion at the second molding position in the cross section perpendicular to the first direction is the second vertical wall line length. Assuming that it is called D 2 ', the first mold and the second mold have a first intermediate vertical wall line length d 1 '/ first vertical wall line length D 1 ': 0.80 to 1 .20, 2nd intermediate vertical wall line length d 2 '/ 2nd vertical wall line length D 2 ': 0.80 to 1.20, 2nd molding height h 2 '/ 1st molding height It is characterized in that it is configured to satisfy h 1 ': 0.80 to 1.20.
[0008]
　In the present invention, "the product height changes from the first molding position to the second molding position" means that the product height changes as a whole from the first molding position to the second molding position. This means that the product height does not necessarily have to change continuously. That is, even if there is a portion where the product height does not change between the first molding position and the second molding position, the press has different product heights between the first molding position and the second molding position. The molded product is a press-molded product to be molded in the present invention.
Effect of the invention
[0009]
　According to the present invention, the appearance quality of a press-molded product can be improved.
A brief description of the drawing
[0010]
FIG. 1 is a schematic perspective view showing an example of a press-molded product according to an embodiment of the present invention.
FIG. 2A is a schematic side view of a press-molded product within a range of a first molding position to a second molding position.
FIG. 2B is a schematic view of a press-molded product at the first molding position of FIG. 2A, and is a cross-sectional view perpendicular to the first direction.
FIG. 2C is a schematic view of a press-molded product at the second molding position of FIG. 2A, and is a cross-sectional view perpendicular to the first direction.
FIG. 3 is a schematic side view showing an example of a press-molded product according to an embodiment of the present invention.
FIG. 4 is a schematic side view showing an example of a press-molded product according to an embodiment of the present invention.
FIG. 5A is a schematic side view showing an example of an intermediate product obtained by processing in the first step, which is within the range from the first molding position to the second molding position according to the prior art.
5B is a schematic view of an intermediate product at the first molding position of FIG. 5A, a cross-sectional view perpendicular to the first direction.
5C is a schematic view of an intermediate product at the second molding position of FIG. 5A, a cross-sectional view perpendicular to the first direction.
FIG. 6 is a schematic view for explaining a processing method from an intermediate product of FIGS. 5A to 5C to a press-molded product.
FIG. 7A is a schematic side view of an intermediate product obtained by processing in the first step, which is within the range from the first molding position to the second molding position according to the embodiment of the present invention. ..
FIG. 7B is a schematic view of an intermediate product at the first molding position of FIG. 7A, and is a cross-sectional view perpendicular to the first direction.
FIG. 7C is a schematic view of an intermediate product at the second molding position of FIG. 7A, a cross-sectional view perpendicular to the first direction.
FIG. 8 is a schematic view for explaining a processing method from an intermediate product of FIGS. 7A to 7C to a press-molded product.
FIG. 9 is a schematic perspective view showing a part of an intermediate product according to an embodiment of the present invention.
FIG. 10 is a schematic cross-sectional view of a first mold at a second molding position.
FIG. 11 is a schematic cross-sectional view of a first mold at a second molding position.
FIG. 12 is a schematic cross-sectional view of a processing die of a first mold at a first molding position.
FIG. 13 is a schematic cross-sectional view of a second mold at a second molding position.
FIG. 14 is a schematic cross-sectional view of a second mold at a second molding position.
FIG. 15 is a schematic cross-sectional view of the anvil of the second mold at the first molding position.
FIG. 16 is a schematic plan view of a press-molded product according to an embodiment of the present invention as viewed from a direction perpendicular to the plate surface of the top plate portion.
FIG. 17 is a schematic perspective view showing an example of a press-molded product according to an embodiment of the present invention.
Mode for carrying out the invention
[0011]
　Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the present specification and the drawings, elements having substantially the same functional configuration are designated by the same reference numerals to omit duplicate description.
[0012]
　In addition, in this specification, the numerical range represented by using "-" means the range including the numerical values ​​before and after "-" as the lower limit value and the upper limit value. In the present specification, the term "process" is used not only as an independent process but also as long as the intended purpose of the process is achieved even if it cannot be clearly distinguished from other processes. included. Further, it is obvious that each element of the following embodiment can be combined with each other.
[0013]

　FIG. 1 is a schematic perspective view showing a press-molded product 10 to be molded according to the present embodiment. The press-molded product 10 of the present embodiment is a hat-shaped component having a top plate portion 11, a vertical wall portion 12 connected to the top plate portion 11, and a flange portion 13 connected to the vertical wall portion 12. The top plate portion 11 has a portion extending in the first direction A 1 (hereinafter, “first extending portion 11a”) and a portion extending in the second direction A 2 which is a direction different from the first direction A 1 (hereinafter, “first extending portion 11a”). Hereinafter, it has a “second stretched portion 11b”). Press-molded product 10 of the present embodiment, the first direction A in the first extending portion 11a 1 in a cross section perpendicular to have a shape in which a pair of vertical wall portions 12 at opposite ends of the top plate portion 11 is provided, second direction a at the second extending portion 11b 2 in the cross section perpendicular to, one vertical wall portion 12 only at the ends of the top plate portion 11 is in the provided shape.
[0014]
　In the press-molded product 10 of the present embodiment, the vertical wall portion 12 extends in a direction perpendicular to the plate surface of the top plate portion 11, but the angle formed by the vertical wall portion 12 and the top plate portion 11 is Not limited to vertical. The angle (internal angle) formed by the vertical wall portion 12 and the top plate portion 11 may exceed 90 °, and the vertical wall portion 12 may be inclined with respect to the top plate portion 11. Further, the vertical wall portion 12 may be partially or wholly inclined with respect to the plate surface of the top plate portion 11 over the first direction A 1 , the second direction A 2, and the curved portion 11c described later. Good.
[0015]
　Further, the names of " first direction A 1 " and "second direction A 2 " are defined for convenience of explanation, and the first direction A 1 shown in FIG. 1 is referred to as a second direction. , the second direction a shown in FIG. 1 2 may be referred to the first direction. The first direction A 1 and the second direction A 2 are different directions, and when the press-molded product 10 is viewed from a direction perpendicular to the top plate portion 11, the second direction A 2 is the first direction. A 1 intersects with respect. When the press-molded product 10 is, for example, a center pillar outer, the first direction A 1 is the vehicle height direction, the second direction A 2 is the vehicle length direction, and the first extension portion 11a is the end portion on the side sill mounting side and the roof side. The portion between the rail and the second extension portion 11b corresponds to the end portion on the side sill mounting side.
[0016]
　As shown in FIG. 1, one end of the first stretched portion 11a is connected to a portion in the middle of the second stretched portion 11b, and the top plate portion 11 is a plane viewed from a direction perpendicular to the plate surface of the top plate portion 11. It is visually formed in a T shape. The first stretched portion 11a and the second stretched portion 11b of the top plate portion 11 are smoothly connected so as to be curved in an arc shape, and the side where the curvature is small with respect to one arc is the outside of the arc. Assuming that the side where the curvature becomes large is referred to as the inside of the arc, the top plate portion 11 has a shape in which the plate surface exists on the outside of the arc. In the present specification, the arcuately curved portion at the position where the first stretched portion 11a and the second stretched portion 11b are connected is referred to as a “curved portion 11c”. The vertical wall portion 12 is also connected to follow the curved portion 11c of the top plate portion 11, and the vertical wall portion 12 at the portion connected to the curved portion 11c is curved. Further, since the flange portion 13 is also connected following the curved vertical wall portion 12, the flange portion 13 is also curved in the curved portion 11c of the top plate portion 11.
[0017]
　Figure 2A, the first direction A shown in FIG. 1 1 arbitrary position (hereinafter, "first molding position P 1 ") and the first direction A 1 first molding position P in 1 curved than position of the parts 11c side (hereinafter, "second forming position P 2 ") is a schematic side view of a press-molded article 10 that are within the scope of the. FIG. 2B shows a schematic cross-sectional view of the press-molded product 10 at the first molding position P1 of FIG. 2A . Further, FIG. 2C shows a schematic cross-sectional view of the press-molded product 10 at the second molding position P2 of FIG. 2A . Sectional view referred to herein, the first direction A 1 is a diagram showing a cross section perpendicular to the.
[0018]
　As shown in FIGS. 2A ~ Figure 2C, the press molded article 10 has a first molding position P 1 Product Height from the flange portion 13 at a height of up to the top plate portion 11 (hereinafter, "first product height H 1 ") is lower than the product height (hereinafter," second product height H 2 ") , which is the height from the flange portion 13 to the top plate portion 11 at the second molding position P 2 . ing. In other words, the press-molded product 10 of the present embodiment, the first molding position P 1 from the second forming position P 2 over the product height first product height H 1 second product height from H 2 is higher up.
[0019]
　In the present specification, the first molding position P 1 of the vertical wall portion 12 in the first direction A 1 vertical wall line length is a line length of a cross-section perpendicular to the (top plate portion 11 side of the R blind flange vertical wall line length D of the length) the first straight line between the R blind parts 13 side 1 , the second forming position P 2 the first direction a in 1 vertical is a line length of a cross-section perpendicular to the The wall line length (the length of a straight line between the R stop on the top plate portion 11 side and the R stop on the flange portion 13 side) is referred to as the second vertical wall line length D 2 . The first vertical wall line length D 1 in the example shown in FIG. 2B is the same length as the first product height H 1 , but the first vertical wall line length D 1 is the first product height H 1. May be longer than. Similarly, the second vertical wall line length D 2 may be longer than the second product height H 2 . The "R stop" in the present embodiment is a boundary between a curved region and a flat region.
[0020]
　In the present embodiment, the product height of the press-molded product 10 is first molded position P 1 from the second forming position P 2 by becoming continuously high subjected, describes an example in which the product height changes However, the product height of the press-molded product 10 is not limited to the case where the product height is continuously increased. Changing areas of the product height, the first molded position P 1 from the second forming position P 2 may be contained in a portion between. For example, a first molding position P of the press-molded product 10 1 from the second forming position P 2 over the may be the product height has become continuously lower. Alternatively, the first forming position P of the press-molded product 10 1 from the second forming position P 2 over the partial product height increases continuously lower becomes part may be mixed. Moreover, the press molded article 10 has a first molding position P 1 from the second forming position P 2 Product Height may contain portions that do not change until.
[0021]
　3 and 4 are schematic side views for exemplifying a modified example of the press-molded product 10. In the example of FIG. 3, the first molding position P 1 from the second forming position P 2 over the product height H of the press-molded product 10 is changed stepwise. 4, a first molding position P 1 from the second forming position P 2 over the, when viewed from a direction perpendicular to the wall surface of the vertical wall portion 12, the top plate portion 11 and the flange portion 13 is curved This is an example of the press-molded product 10. In the example shown in FIG. 4 the first molding position P 1 from the second forming position P 2 over the product height H is changing continuously. The press-molded article 10 as shown in FIGS. 3 and 4 is also included in the present invention.
[0022]
　The above cross-section, a first molding position P 1 or the second molding position P 2 in, when viewed from a direction perpendicular to the plate surface of the top plate portion 11, a top plate portion 11 and the vertical wall portion 12 It is a cross section perpendicular to the ridge line (when the ridge line is a curve, the normal line at the molding position).
[0023]
(Maximum product height H max and minimum product height H min )
　The press-molded product according to the present embodiment has the maximum product height H max of the press-molded product 10 in the first stretched portion 11a and the press-molded product 10. It is preferable that the ratio (H max / H min ) with the minimum product height H min satisfies the relationship of the following (Equation 1).
[0024]
　　(H max / H min )> 1.20 Equation 1
[0025]
　Further, it is more preferable that the above formula 1 is satisfied not only in the above-mentioned first stretched portion 11a but also in the second stretched portion 11b and the curved portion 11c. That is, from the first stretched portion 11a to the curved portion 11c and the second stretched portion 11b, the ratio (H max) of the maximum product height H max of the press-molded product 10 to the minimum product height H min of the press-molded product 10. / H min ) more preferably satisfies the following relationship (Equation 1).
[0026]
　　(H max / H min )> 1.20 Equation 1
[0027]
　The maximum product height H max of the press-molded product 10 means the product height at the position where the product height of the press-molded product 10 is the highest. Further, the minimum product height H min of the press-molded product 10 means the product height at the position where the product height of the press-molded product 10 is the lowest.
[0028]
The
　press-molded product 10 shown in FIGS. 1 and 2 is intermediate between the first step of processing a blank into an intermediate product 20 shown in FIGS. 7A to 7C and 9 which will be described later. The product 20 is manufactured through a second step of processing the press-molded product 10 shown in FIGS. 1 and 2A to 2C. In the manufacturing method of the present embodiment, the intermediate product 20 is manufactured by drawing the blank in the first step, and the press-molded product 10 is manufactured by bending the intermediate product 20 in the second step.
[0029]
　In this specification, the portion corresponding to the top plate portion 11 of the finished product (press molded product 10) in the intermediate product 20 shown in FIGS. 7A to 7C and FIG. 9 to be described later is referred to as the intermediate top plate portion 21. To do. Similarly, in the intermediate product 20, the portion corresponding to the vertical wall portion 12 of the finished product (press molded product 10) is designated as the intermediate vertical wall portion 22, and in the intermediate product 20, the flange portion 13 of the finished product (press molded product 10) is formed. The corresponding portion is referred to as an intermediate flange portion 23. Further, FIGS. 7A and the first forming position P, as shown in FIG. 7B 1 of the intermediate vertical wall portion 22 in the first direction A 1 vertical wall line length is line length in the cross section perpendicular to the (intermediate top plate The length of the straight line between the R stop on the 21 side and the R stop on the intermediate flange portion 23 side) is the first intermediate vertical wall line length d 1 , and the second molding position P as shown in FIGS. 7A and 7C. 2 of the intermediate vertical wall portion 22 in the first direction a 1 between the vertical wall line length is line length in the cross section perpendicular to the (R stoppage of the intermediate top panel section 21 side and the intermediate flange portion 23 side of the R blind intermediate vertical wall line length d of the length of the straight line) of the second 2 , the first molded position P 1 to a height of forming height from the intermediate flange section 23 in to the intermediate top panel section 21 first shaping The second molding height h 2 is the molding height which is the height from the intermediate flange portion 23 to the intermediate top plate portion 21 at the height h 1 and the second molding position P 2 . Called.
[0030]
　Here, before explaining the manufacturing method of the present embodiment, the prior art will be described for convenience of explanation. FIG. 5A is a side view showing an example of the intermediate product 120 according to the prior art. FIG. 5B is a schematic cross-sectional view of the intermediate product 120 at the first molding position P1 of FIG. 5A . FIG. 5C is a schematic cross-sectional view of the intermediate product 120 at the second molding position P2 of FIG. 5A . Sectional view referred to herein, the first direction A 1 is a diagram showing a cross section perpendicular to the.
[0031]
　In the example shown in FIGS. 5A ~ FIG 5C, a first molding position P of the intermediate product 120 1 from the second forming position P 2 in the range up to, angle intermediate the top plate portion 121 and the intermediate vertical wall portion 122 is The processing in the first step is performed so that the intermediate product 120 is vertical and the first molding height h 1 and the second molding height h 2 of the intermediate product 120 are the same. Further, the first molding height h 1 is the same as the first product height H 1 of the press-molded product 10 which is the finished product shown in FIG. 2B, and the first intermediate vertical wall of the intermediate product 120. The line length d 1 is also the same as the first vertical wall line length D 1 of the press-molded product 10 shown in FIG. 2B . Therefore, the intermediate product 120 in FIG. 5A ~ 5C are first shaped position P 1 shape in the first molding position P 1 has become equivalent to the shape of the press-molded product 10 in. On the other hand, in the intermediate product 120 of FIGS. 5A to 5C, the second molding height h 2 is different from the second product height H 2 of the press-molded product 10 shown in FIG. 2C. Similarly, the second molding height h 2 Intermediate vertical wall line length d 2Is also different from the second vertical wall line length D 2 .
[0032]
　Therefore, in order to manufacture the press-molded product 10 as shown in FIG. 2 from the intermediate product 120 as shown in FIGS. 5A to 5C, the second intermediate vertical wall line shown in FIG. 5C is processed in the second step. the length d 2 and a second vertical wall line length D of the press-molded product 10 shown in FIG. 2C 2 needs to be processed to match the. That is, it is necessary to bend back the intermediate flange portion 123 as shown in FIG. 6 by processing in the second step, and to newly form the flange portion 13 as the press-molded product 10 on the plate surface of the intermediate flange portion 123. .. In FIG. 6, the cross-sectional shape of the press-molded product 10 after bending and stretching is shown by a broken line. When such processing is performed, bending marks between the intermediate vertical wall portion 122 and the intermediate flange portion 123 are likely to remain on the vertical wall portion 12 of the press-molded product 10, which causes deterioration in appearance quality.
[0033]
　Next, an example of the manufacturing method of the press-molded product 10 in the present embodiment will be described. FIG. 7A is a side view showing an intermediate product 20 manufactured by processing in the first step according to an embodiment of the present invention. FIG. 7B is a schematic cross-sectional view of the intermediate product 20 at the first molding position P1 of FIG. 7A . FIG. 7C is a schematic cross-sectional view of the intermediate product 20 at the second molding position P2 of FIG. 7A . Sectional view referred to herein, the first direction A 1 is a diagram showing a cross section perpendicular to the.
[0034]
　As shown in FIGS. 7A to 7C, in the example of the intermediate product 20 of the present embodiment, the first molding height h 1 and the second molding height h 2 are the same. However, in the intermediate product 20 of the present embodiment, the cross-sectional shape at the second molding position P2 shown in FIG. 7C is different from the cross-sectional shape of the conventional intermediate product 120 shown in FIG. 5C. More specifically, in the conventional intermediate product 120 shown in Figure 5C, a second molding position P of the 2 angle of the intermediate top panel section 21 in the intermediate vertical wall portion 22 is perpendicular, the second intermediate Tatekabesen the length d 2 is the second vertical wall line length D of the press-molded product 10 is finished 2 less than. On the other hand, in the example of the intermediate product 20 of the present embodiment shown in FIG. 7C, the intermediate vertical wall portion 22 is inclined with respect to the intermediate top plate portion 21 at the second molding position P2, and the second intermediate vertical wall portion 22 is inclined. The wall line length d 2 is the same as the second vertical wall line length D 2 of the press-molded product 10 .
[0035]
(Ratio of intermediate vertical wall line length and d to vertical wall line length D)
　The second intermediate vertical wall line length d 2 in the intermediate product 20 shown in FIG. 7C is the second vertical wall line length D of the press-formed product 10. Although it is the same as 2 , the second intermediate vertical wall line length d 2 and the second vertical wall line length D 2 do not necessarily have to be the same. Similarly, the first intermediate vertical wall line length d 1 and the first vertical wall line length D 1 do not necessarily have to be the same.
[0036]
In the method for producing a press-molded product according to the present embodiment, the ratio (d 1 / D 1 ) of the first intermediate vertical wall line length d 1 and the first vertical wall line length D 1 is 0.80 to 1. 20 may be satisfied. That is, 0.80 ≦ (d 1 / D 1 ) ≦ 1.20 is satisfied. When d 1 / D 1 is less than 0.80, the boundary between the intermediate flange portion 23 and the intermediate vertical wall portion 22 is located at the vertical wall portion 12 of the press-molded product 10 which is a finished product. Therefore, a pattern residue is likely to occur on the vertical wall portion 12 of the press-molded product 10.
[0037]
It is more preferable that the lower limit of 　d 1 / D 1 is 0.90, that is, d 1 / D 1 ≧ 0.90. When d 1 / D 1 is 0.90 or more, the pattern residue on the vertical wall portion 12 of the press-molded product 10 can be suppressed more stably.
[0038]
On the other hand, when d 1 / D 1 > 1.20, that is, when d 1 / D 1 exceeds 1.20, the boundary between the intermediate vertical wall portion 22 and the intermediate flange portion 23 becomes the flange portion 13 of the press-formed product 10. It will be located. Therefore, a pattern residue is likely to occur on the flange portion 13 of the press-molded product 10.
[0039]
The upper limit of 　d 1 / D 1 is more preferably 1.10. When d 1 / D 1 is 1.10 or less, the pattern residue of the flange portion 13 can be suppressed more stably.
[0040]
　Further, in the method for manufacturing a press-molded product according to the present embodiment, the ratio (d 2 / D 2 ) of the second intermediate vertical wall line length d 2 to the second vertical wall line length D 2 is 0.80 to 1.20 may be satisfied. That is, 0.80 ≦ (d 2 / D 2 ) ≦ 1.20 is satisfied. When d 2 / D 2 is less than 0.80, the boundary between the intermediate flange portion 23 and the intermediate vertical wall portion 22 is located at the vertical wall portion 12 of the press-molded product 10 which is a finished product. Therefore, a pattern residue is likely to occur on the vertical wall portion 12 of the press-molded product 10. When d 2 / D 2 exceeds 1.20, the boundary between the intermediate vertical wall portion 22 and the intermediate flange portion 23 is located at the flange portion 13 of the press-molded product 10. Therefore, a pattern residue is likely to occur on the flange portion 13 of the press-molded product 10.
[0041]
　In order to suppress the pattern residue of the vertical wall portion 12 more stably, it is more preferable that d 2 / D 2 ≧ 0.90, that is, the lower limit of d 2 / D 2 is 0.90. In order to suppress the pattern residue of the flange portion 13 more stably, it is more preferable that d 2 / D 2 ≤ 1.10, that is, the upper limit of d 2 / D 2 is 1.10.
[0042]
　The closer the value of d 2 / D 2 is to 1.0, the more preferable it is, and it is particularly preferable that d 2 / D 2 = 1.0. When the press-molded product 10 is manufactured from the intermediate product 20 of the present embodiment, the second intermediate vertical wall line length d 2 is the same as the second vertical wall line length D 2 , as shown in FIG. The vertical wall portion 12 of the press-molded product 10 can be formed only by bending the product 10. That is, it is not necessary to bend back the intermediate flange portion 23 as shown in FIG. 6, and the vertical wall portion 12 as the press-molded product 10 does not leave a bending mark between the intermediate vertical wall portion 22 and the intermediate flange portion 23. .. Therefore, in the press molding method of the present embodiment, it is possible to suppress the occurrence of pattern residue on the vertical wall portion 12, and it is possible to improve the appearance quality of the press molded product 10.
[0043]
( Ratio of Second Molding Height h 2 and First Molding Height h 1 ) In the
　method for producing the press-molded product 10 according to the present embodiment, the second molding height h 2 and the first molding height h 2 in the intermediate product 20. The ratio of the molding heights h 1 (h 2 / h 1 ) is 0.80 to 1.20, that is, 0.80 ≦ (h 2 / h 1 ) ≦ 1.20. If h 2 / h 1 is less than 0.80 , distortion occurs between the first molding position P 1 and the second molding position P 2 when the intermediate product 20 is bent in the second step . Stress is partially applied to the top plate portion 11. Therefore, wrinkles are likely to occur on the top plate portion 11 of the press-molded product 10.
[0044]
Also, h 2 / h 1 may exceeds 1.20, Similarly, the second when performing bending a middle product 20 in step, a first molding position P 1 and the second molding position P 2 between Distortion is likely to occur in. Therefore, wrinkles are likely to occur on the top plate portion 11 of the press-molded product 10.
[0045]
　In order to suppress wrinkles of the top plate portion 11 more stably, h 2 / h 1 lower limit of 0.90, i.e. h 2 / h 1 more preferably ≧ 0.90, h 2 / h 1 The upper limit of is more preferably 1.10, that is, h 2 / h 1 ≦ 1.10.
[0046]
　In the method for producing the press-molded product 10 according to the present embodiment, the press-molded product 10 is produced in the second step by processing so that the intermediate product 20 satisfying the above conditions can be obtained in the first step. It is possible to prevent the occurrence of wrinkles and the remaining pattern. Therefore, the appearance quality of the press-molded product 10 can be improved.
[0047]
　The material of the blank is not particularly limited, but for example, a steel plate is adopted. Further, according to the press molding method of the present embodiment, it is possible to suppress wrinkles on the top plate portion 11 and pattern residue on the vertical wall portion 12 even with a high-tensile material having a high molding difficulty. Therefore, when a steel plate having a tensile strength of 590 MPa or more is used as the blank material, the effect of improving the appearance quality is more remarkable.
[0048]
　Further, the angle formed by the intermediate top plate portion 21 and the intermediate vertical wall portion 22 during processing in the first step of the present embodiment is the vertical wall line length, product height, and top plate portion 11 of the press-molded product 10. It is appropriately set according to the angle between the vertical wall portion 12 and the vertical wall portion 12. For example, at an arbitrary position Pn between the first molding position P 1 and the second molding position P 2 of the present embodiment in the press-molded product 10 shown in FIGS. 2A to 2C, the position of the intermediate product 20 The intermediate vertical wall line length d n of the above is equal to or less than the second intermediate vertical wall line length d 2 of the intermediate product 20 at the second molding position P 2 . The difference in the length of the intermediate vertical wall line between the arbitrary position P n and the second molding position P 2 is | d n − d 2 |. Here, an arbitrary position P of the intermediate product 20 shown in FIG. 7A ~ 7C n intermediate product height h in n and, second forming position P 2 an intermediate product height h in 2 the difference between | h n -h 2If |, then | d n − d 2 |> | h n −h 2 |.
[0049]
　Therefore, the width of the intermediate top plate portion 21 (the line length of the intermediate top plate portion 21 in the cross section perpendicular to the first direction A 1 ) is the same at the arbitrary position P n and the second molding position P 2. In the case of, the angle (inner angle) formed by the intermediate top plate portion 21 and the intermediate vertical wall portion 22 at an arbitrary position P n is the intermediate top plate portion 21 and the intermediate vertical wall portion at the second molding position P 2 . It is smaller than the angle (inner angle) formed by 22.
[0050]
　FIG. 9 shows a schematic perspective view showing a part of the intermediate product 20 according to the present embodiment. Perspective view of FIG. 9, not the entire intermediate product 20, as shown in FIG. 7A, a first molding position P 1 from the second forming position P 2 shows a part of the intermediate product 20 in the range of up to is there.
[0051]
　In the present embodiment, the first intermediate vertical wall line length d 1 and the first vertical wall line length D 1 are the same, and the second intermediate vertical wall line length d 2 and the second vertical wall line length D are the same. 2 are the same, the first forming height h 1 and the second forming height h 2 has been described for an example in which performs a processing in the first step to be the same. However, the present invention is not limited to this embodiment.
[0052]
Next, the manufacturing equipment for press-molded products according to the present invention will be described. As will be described later, the manufacturing equipment 30 of the press-molded product 10 has a first mold 40 for processing the blank 60 into the intermediate product 20 and a second mold 40 for processing the intermediate product 20 into the press-molded product 10. It has a mold 50 and. In an example described in the present embodiment, the first die 40 is a drawing die configured to perform drawing, and the second die 50 is a bending configured to perform bending. It is a mold.
[0053]
(First Mold)
　FIG. 10 is a schematic cross-sectional view of the first mold 40 at the second molding position P2 of the present embodiment . The first die 40 of the present embodiment surrounds the processing die 41 for drawing, which is arranged as the upper die, the punch 42 facing the processing die 41 arranged as the lower die, and the punch 42. It includes a blank holder 43 arranged so as to. The processing die 41 has a recess 44 that meshes with the top of the punch 42. The recess 44 has a surface 44a having the same shape as the intermediate top plate portion 21 and a surface 44b having the same shape as the intermediate vertical wall portion 22 connected to the surface. Further, a surface 44c connected to the surface 44b is formed on the portion of the processing die 41 facing the blank holder 43. Since each of these surfaces 44a to 44c is formed on the processing die 41, when the first mold 40 is closed, the intermediate top plate portion 21, the intermediate vertical wall portion 22, and the intermediate flange of the intermediate product 20 are formed. The portion 23 is molded. That is, each of the surfaces 44a to 44c of the processing die 41 corresponds to a portion for forming the intermediate top plate portion 21, a portion for forming the intermediate vertical wall portion 22, and a portion for forming the intermediate flange portion 23, respectively.
[0054]
　In the present specification, the portion of the first mold 40 for forming the intermediate top plate portion 21 is the intermediate top plate forming portion 44a, and the portion for forming the intermediate vertical wall portion 22 is the intermediate vertical wall forming portion 44b. The portion of the intermediate flange portion 23 to be molded is referred to as an intermediate flange molding portion 44c.
[0055]
　When machining is performed using the first die 40 as described above, the machining die 41 and the blank holder 43 are lowered or punched while the blank 60 is held by the machining die 41 and the blank holder 43. By raising 42, the blank 60 is pushed into the recess 44 of the processing die 41 as shown in FIG. As a result, the blank 60 is processed into a shape that follows the shape of the recess 44 of the processing die 41, and the intermediate product 20 is manufactured.
[0056]
　Figure 12 is a first forming position P of the present embodiment 1 is a schematic cross-sectional view showing the processing die 41 of the first die 40 in. In the present specification, as shown in FIGS. 12 and 10, a first molding position P 1 of the intermediate vertical wall molded portion 44b of the first direction A 1 vertical wall line is a line length in a cross section perpendicular to the length intermediate vertical wall line length of the first (length of the straight line between the R stubbornly R stubbornly intermediate top plate forming portion 44a side and the intermediate flange-forming portion 44c side) d 1 ', the second forming position P 2 of the intermediate vertical wall molded portion 44b of the first direction a 1 stop R of the vertical wall line length is line length in the cross section perpendicular to the (blind intermediate top plate forming portion 44a side R and the intermediate flange-forming portion 44c side straight length) the second intermediate vertical wall line length d between the 2 ', the first molded position P 1 molded height is the height from the intermediate flange-forming portion 44c at to the intermediate top plate forming portion 44a first forming height of h 1 ', the second forming position P 2 from the intermediate flange-forming portion 44c at to the intermediate top plate forming portion 44a of the is forming height height second forming height h 2 Call it'.
[0057]
　The first intermediate vertical wall line length d 1 , the first molding height h 1 , the second intermediate vertical wall line length d 2 , and the second intermediate product 20 obtained by processing with the first mold 40 . The molding height h 2 of the first mold 40 is the first intermediate vertical wall line length d 1 ', the first molding height h 1 ', the second intermediate vertical wall line length d 2 ', and It is equal to the second molding height h 2 ', respectively.
[0058]
(Second mold)
　13, a second molding position P of the present embodiment 2 is a schematic cross-sectional view of the second mold 50 in. The second mold 50 of the present embodiment has a pad 51 arranged as an upper mold, a processing die 52 for bending arranged so as to surround the pad 51, and an anvil 53 arranged as a lower mold. It has. The anvil 53 has a surface 53a having the same shape as the top plate portion 11 of the press-molded product 10, a surface 53b having the same shape as the vertical wall portion 12 of the press-molded product 10 connected to the surface 53a, and the surface 53b. It has a surface 53c connected to the surface 53c. Since the anvil 53 has each of these surfaces 53a to 53c, when the second mold 50 is closed, the top plate portion 11, the vertical wall portion 12, and the flange portion 13 of the press-molded product 10 Molding is done. That is, each of the surfaces 53a to 53c of the anvil 53 corresponds to a portion for forming the top plate portion 11, a portion for forming the vertical wall portion 12, and a portion for forming the flange portion 13. In the present specification, the portion of the second mold 50 for forming the top plate portion 11 is the top plate forming portion 53a, and the portion for forming the vertical wall portion 12 is the vertical wall forming portion 53b and the flange portion 13. The portion to be molded is referred to as a flange molding portion 53c.
[0059]
　When processing the intermediate product 20 using the second mold 50 as described above, the intermediate top plate portion 21 is located between the top plate molding portion 53a of the anvil 53 and the pad 51. The intermediate product 20 is arranged in, and the processing die 52 is lowered as shown in FIG. 14 in a state where the pad 51 is pressed and the intermediate product 20 is pressed. As a result, the intermediate product 20 is processed into a shape that follows the top plate molding portion 53a, the vertical wall molding portion 53b, and the flange molding portion 53c of the anvil 53, and the press-molded product 10 is manufactured.
[0060]
　Figure 15 is a first forming position P of the present embodiment 1 is a schematic diagram showing a second anvil 53 of the die 50 in. In the present specification, as shown in FIGS. 15 and 13, the second die 50, a first molding position P of 1 vertical wall molded portion 53b of the first direction A 1 in a cross-section perpendicular to the The vertical wall line length (the length of a straight line between the R stop on the top plate forming portion 53a side and the R stop on the flange forming portion 53c side), which is the line length, is the first vertical wall line length D 1 ', the second. the molding position P 2 of the vertical wall forming portion 53b in the first direction a 1 R a vertical wall line length is line length in the cross section perpendicular to the (R stoppage of the top mold portion 53a side of the flange forming portion 53c side blind vertical wall line length D of the length of the straight line) a second between the 2 ', the first molded position P 1 the product height is the height from the flange forming portion 53c to the top plate forming portion 53a of first product height H 1 ', the second forming position P 2 the product height is the height from the flange forming portion 53c in the up top plate forming portion 53a second product height H 2 ' is referred to as.
[0061]
　The first vertical wall line length D 1 , the first product height H 1 , the second vertical wall line length D 2 , and the second vertical wall line length D 1 of the press-molded product 10 obtained by processing with the second die 50 . product height H 2 , a first vertical wall line length D of the second die 50 1 ', the first product height H 1 ', the second vertical wall line length D 2 ', and the second It is equal to the product height H 2 '.
[0062]
　As described above, in the intermediate product 20 of the present embodiment , the ratio of the first intermediate vertical wall line length d 1 to the first vertical wall line length D 1 , the second intermediate vertical wall line length d 2 and the second The ratio of the vertical wall line length D 2 and the ratio of the second molding height h 2 to the first molding height h 1 satisfy 0.80 to 1.20, respectively. In other words, in the first mold 40 of the present embodiment, the first intermediate vertical wall line length d 1 'between the first vertical wall line length D 1 ratio', the second intermediate vertical wall line length d 2 'and the second vertical wall line length D 2 ratio', and a second forming height h 2 'and the first forming height h 1 ratio' is the same condition is satisfied and the intermediate product 20 Therefore, it is possible to suppress the occurrence of wrinkles and pattern residue of the press-molded product 10.
[0063]
　That is, in the manufacturing equipment 30 of the press-molded product according to the present embodiment, the first die 40 and second die 50, a first intermediate vertical wall line length d 1 'between the first vertical wall line length The ratio of D 1 '(d 1 '/ D 1 ') is configured to be 0.80 to 1.20. That is, 0.80 ≦ (d 1 ′ / D 1 ′) ≦ 1.20 is satisfied. d 1 '/ D 1 when' is less than 0.80, the pattern remaining tends to occur in the vertical wall portion 12 of the press-molded product 10. d 1 '/ D 1 when' exceeds 1.20, the pattern remaining tends to occur in the flange portion 13 of the press-molded product 10.
[0064]
　In order to suppress a pattern remaining vertical wall portion 12 more stably, d 1 '/ D 1 lower limit' In order to suppress a pattern remaining flange portion 13 more stably, d 1 '/ D 1 limit' is more preferably 1.10.
[0065]
　In the production facility 30 of the press-molded product according to the present embodiment, the first die 40 and second die 50, a second intermediate vertical wall line length d 2 'and the second vertical wall line length The ratio of D 2 '(d 2 '/ D 2 ') is configured to be 0.80 to 1.20. That is, 0.80 ≦ (d 2 ′ / D 2 ′) ≦ 1.20 is satisfied. d 2 '/ D 2 When' is less than 0.80, the pattern remaining tends to occur in the vertical wall portion 12 of the press-molded product 10. d 2 '/ D 2 When' exceeds 1.20, the pattern remaining tends to occur in the flange portion 13 of the press-molded product 10.
[0066]
　In order to suppress a pattern remaining vertical wall portion 12 more stably, d 2 '/ D 2 the lower limit of the' In order to suppress a pattern remaining flange portion 13 more stably, d 2 '/ D 2 limit' is more preferably 1.10.
[0067]
　In the production facility 30 of the press-molded product according to the present embodiment, the first mold 40, a second forming height h 2 'and the first forming height h 1 ratio' (h 2 '/ h 1 ') is configured to be 0.80 to 1.20. That is, 0.80 ≦ (h 2 ′ / h 1 ′) ≦ 1.20 is satisfied. h 2 '/ h 1 when' is less than 0.80, wrinkle tends to occur in the top plate portion 11 of the press-molded product 10. Also, h 2 '/ h 1 may' exceeds 1.20, wrinkles are likely to occur in the top plate portion 11 of the press-molded product 10. In order to suppress wrinkles of the top plate portion 11 more stably, h 2 '/ h 1 lower limit' Further, in order to suppress wrinkles of the top plate portion 11 more stably, h 2 '/ h 1 limit' is more preferably 1.10.
[0068]
　Although one embodiment of the present invention has been described above, the present invention is not limited to such an example. It is clear that a person skilled in the art can come up with various modifications or modifications within the scope of the technical idea described in the claims, and of course, the technical scope of the present invention also includes them. It is understood that it belongs to.
[0069]
　For example, in the above embodiment, the example in which the press-molded product 10 has a symmetrical shape with the central position of the width of the top plate portion 11 as the axis of symmetry has been described, but the press-molded product 10 may have a left-right asymmetric shape. For example, the first direction A as described above 1 to vertical wall line length of the pair of vertical wall portions 12 in a cross section perpendicular to may differ from each of the one vertical wall portion 12 and the top plate portion 11 The angle formed by the other vertical wall portion 12 and the top plate portion 11 may be different from each other. Even in this case, the appearance quality of the press-molded product 10 can be improved as long as the ratio of the intermediate vertical wall line length to the vertical wall line length described above is satisfied in each vertical wall portion 12.
[0070]
　Further, in the above embodiment, the molding method of the press-molded product 10 in the first stretched portion 11a has been described, but also in the second stretched portion 11b, the press-molded product having a shape in which the product height changes toward the curved portion 11c. If it is 10, the same molding method can be applied.
[0071]
　FIG. 16 is a schematic plan view of the press-molded product 10 as viewed from a direction perpendicular to the plate surface of the top plate portion. In the example of FIG. 1, the first molding position P 1 and the second molding position P 2 are located at the first stretched portion 11a. However, in the above embodiment, as shown in FIG. 16, the third molding position P which is located in the second extending portion 11b 3 , and the fourth forming position P of 4 in the third molding position P of 3 in the third the forming height h 3 , a third intermediate vertical wall line length d 3 and the third vertical wall line length D of 3 and, fourth molding position P 4 at a fourth forming height h 4 , the fourth The intermediate vertical wall line length d 4 and the fourth vertical wall line length D 4 are 0.80 to 1.20 for d 3 / D 3 , 0.80 to 1.20 for d 4 / D 4 , and h 4 / H 3 may satisfy the relationship of 0.80 to 1.20.
[0072]
　In the above embodiment, as shown in FIG. 16, the fifth shaping position P located on the curved portion 11c of the press-molded product 10 5 in the fifth forming height h of 5 , the fifth intermediate Tatekabesen The length d 5 and the fifth vertical wall line length D 5 may be replaced with the second forming height h 2 , the second intermediate vertical wall line length d 2 and the second vertical wall line length D 2 , respectively. .. Alternatively, the fifth molding height h 5 , the fifth intermediate vertical wall line length d 5 and the fifth vertical wall line length D 5 are set to the fourth molding height h 4 , the fourth intermediate vertical wall line length. It may be replaced with d 4 and the fourth vertical wall line length D 4 , respectively.
[0073]
　Further, the shape of the press-molded product 10 is not limited to that described in the above embodiment. The press-molded product 10 may have a shape such as an L-shape in which one end of the first stretched portion 11a and one end of the second stretched portion 11b are connected via a curved portion 11c. Further, the press-molded product 10 further includes a third stretched portion (not shown) which is a portion extending in a third direction (not shown) such as a Y-shape, and one end of the first stretched portion 11a and a first. The shape may be such that one end of the two stretched portions 11b and one end of the third stretched portion are connected to each other via the curved portion 11c. The press-molded product 10 is, for example, an automobile part including at least one of a T-shaped, an L-shaped, and a Y-shaped portion in a plan view. Specifically, the press-molded product is, for example, a center pillar outer, a front pillar lower, a side panel outer, or the like.
[0074]
　That is, the above-mentioned first direction may be replaced with a third direction, and also in this third direction, the press-molded product 10 having a shape in which the product height changes toward the curved portion 11c of the third stretched portion. if, in the third direction, the first molded position P as described above 1 -fourth molding position P of 4 to set the same molding position and method of the press-molded product according to the embodiment Can be applied.
[0075]
　FIG. 17 is a schematic perspective view showing another example of the press-molded article 10 according to the above embodiment. The press-molded product 10 of FIG. 17 has the same overall configuration as the press-molded product 10 shown in FIG. 1, but has a first product height H 1 and a second molding position at the first molding position P 1 . P 2 a second product height H of the 2 difference between is smaller than the example of FIG.
[0076]
　Further, in the method for producing the press-molded product 10 of the above embodiment, the drawing process is performed in the first step, but the processing method in the first step is not limited to the drawing process. In the processing method in the first step, the ratio (d 1 / D 1 ) of the first intermediate vertical wall line length d 1 to the first vertical wall line length D 1 satisfies 0.80 to 1.20, and the first step is made. The ratio (d 2 / D 2 ) of the intermediate vertical wall line length d 2 of 2 to the second vertical wall line length D 2 satisfies 0.80 to 1.20, and the second molding heights h 2 and the first Any processing method may be used as long as an intermediate product 20 having a molding height h 1 ratio (h 2 / h 1 ) of 0.80 to 1.20 can be obtained. Further, the processing method in the second step is not limited to bending processing.
[0077]
　In the manufacturing equipment 30 of the press-molded product 10 of the above embodiment, the first die 40 is a drawing die configured to perform drawing, but the first die 40 is a drawing die. Not limited. The first mold 40, the first intermediate vertical wall line length d 1 'between the first vertical wall line length D 1 ratio' (d 1 '/ D 1 a') is from 0.80 to 1.20 The ratio (d 2 '/ D 2 ') of the second intermediate vertical wall line length d 2 and the second vertical wall line length D 2 satisfies 0.80 to 1.20, and the second molding height is satisfied. h 2 'and the first forming height h 1 ' ratio (h 2 '/ h 1 ') may be composed to satisfy 0.80 to 1.20. Further, the second mold 50 is not limited to the bending mold configured to perform the bending process.
Example
[0078]
　A molding simulation (software used: J-STAMP) of a press-molded product having a shape as shown in FIG. 1 was performed to evaluate the appearance of the press-molded product. In the molding simulation, drawing as a first step is performed so that an intermediate product satisfying the conditions shown in Table 1 below and a press-molded product (first product height is 80 mm, second product height is 96 mm) can be obtained. The manufacturing conditions were processing and bending as a second step. The blank is a steel plate having a tensile strength of 980 MPa.
[0079]
　The appearance quality is evaluated by observing the top plate, vertical wall, and flange of the press-molded product of the analysis model on a shading display, and determining where wrinkles and pattern residues occur by sensory evaluation. I was broken.
[0080]
[table 1]

[0081]
　As shown in Table 1, in the present simulation, No. 1 according to the embodiment of the present invention. In the analysis models 1, 2, 4, 6 and 8, no pattern residue was generated on the vertical wall portion and the flange portion, and good results were obtained.
[0082]
　On the other hand, No. 1 is a production condition in which d 1 / D 1 and d 2 / D 2 exceed 1.20. In the analysis model of No. 3, pattern residue was generated on the flange portion, and the appearance quality was deteriorated. In addition, No. 1 under manufacturing conditions such that d 1 / D 1 and d 2 / D 2 are less than 0.80. In the analysis model of No. 5, pattern residue was generated on the vertical wall portion, and the appearance quality was deteriorated. In addition, No. 1 which is a production condition such that h 2 / h 1 exceeds 1.20. No. 7 analysis model and manufacturing conditions such that h 2 / h 1 is less than 0.80. In the analysis model of 9, wrinkles were generated on the top plate portion, and the appearance quality was deteriorated.
[0083]
　In addition, No. 1 under manufacturing conditions such that d 1 / D 1 and d 2 / D 2 are less than 0.80. In the analysis model of 10, pattern residue was generated on the vertical wall portion, and the appearance quality was deteriorated.
[0084]
　According to the results of this simulation , pattern residue and wrinkles are formed by drawing so that d 1 / D 1 , d 2 / D 2 , and h 2 / h 1 are 0.80 to 1.20, respectively. Etc. can be suppressed.
Industrial applicability
[0085]
　The present invention can be used in the manufacture of press-molded articles for automobiles.
Code description
[0086]
10 Press-molded product
11 Top plate part
11a First stretched part
11b Second stretched part
11c Curved part
12 Vertical wall part
13 Flange part
20 Intermediate product
21 Intermediate top plate part
22 Intermediate vertical wall part
23 Intermediate flange part
30 Manufacturing equipment
40 Mold
41 Machining die
42 Punch
43 Blank holder
44 Recess
44a Intermediate top plate forming part
44b Intermediate vertical wall forming part
44c Intermediate flange forming part
50 Second mold
51 Pad
52 Machining die
53 Anvil
53a Top plate forming part
53b Vertical wall forming part
53c Flange forming part
60 blank
D 1　　　　　press-molded product first vertical wall line length
D 1 'of the second first vertical wall line length of the mold
d 1　　　　　first intermediate vertical wall line of the intermediate product
d 1 ' first mold first intermediate vertical wall line length of
D 2　　　　　second vertical wall line length of the press-molded product
D 2 'second second mold longitudinal wall line length
d 2　　　　　second intermediate vertical intermediate products wall line length
d 2 'first mold second intermediate vertical wall line length of
H 1　　　　　first product height of the press-molded product
H 1 first product height' of the second mold
h 1　　　　　intermediate First molding height
h of the product 1 'first mold first forming height of the
H 2　　　　　second product height of the press-molded product
H 2 ' second second mold product height
h 2　　　　　second forming of the intermediate product the height
h 2 'first second forming height of the mold
P 1　　　　　a first molding position
P 2　　　　　a second molding position
a 1　　　　　the first direction
a 2　　　　　second direction
The scope of the claims
[Claim 1]
　A top plate portion extending in a first direction and a second direction, and a portion extending in the first direction and a portion extending in the second direction are connected via a curved portion, and a vertical portion connected to the top plate portion. It has a wall portion and a flange portion connected to the vertical wall portion, and an
　arbitrary position in the first direction is a first molding position, and a position on the curved portion side of the first molding position is a second. When it was called the molding position, the first toward the second molding position from the molding position of the height from the flange portion to the top plate portion first product height H 1 from the second product the height H 2 changes to a manufacturing method of a press-molded product,
　the intermediate top panel section a portion corresponding to the top plate portion of the intermediate product, the intermediate vertical portions corresponding to the vertical wall portion in the intermediate product The wall portion and the portion corresponding to the flange portion in the intermediate product are referred to as an intermediate flange portion, and
　the line length of the cross section of the intermediate vertical wall portion at the first molding position perpendicular to the first direction is the first. The intermediate vertical wall line length d 1 of the above, the line length of the cross section of the intermediate vertical wall portion at the second molding position perpendicular to the first direction is the second intermediate vertical wall line length d 2 , the first The height from the intermediate flange portion to the intermediate top plate portion at the molding position is the first molding height h 1 , and the height from the intermediate flange portion to the intermediate top plate portion at the second molding position is the height. The first vertical wall line length D is the line length of the second molding height h 2 and the cross section of the vertical wall portion at the first molding position perpendicular to the first direction. 1 , wherein the vertical wall portion in a second molding position, the line length of the cross section perpendicular to the first direction the second vertical wall line length D 2 When was designated,
　by processing a blank,
　1st intermediate vertical wall line length d 1 / 1st vertical wall line length D 1 : 0.80 to 1.20,
　2nd intermediate vertical wall line length d 2 / 2nd vertical wall line length D 2 : The first step of manufacturing the intermediate product satisfying 0.80 to 1.20,
　the second molding height h 2 / the first molding height h 1 : 0.80 to 1.20,
and the
　intermediate A method for producing a press-molded product, comprising a second step of producing the press-molded product by processing the product.
[Claim 2]
　The method for producing a press-molded product according to claim 1, wherein the blank is a steel plate having a tensile strength of 590 MPa or more.
[Claim 3]
　A press-molded product manufacturing facility having a top plate portion, a vertical wall portion connected to the top plate portion, and a flange portion connected to the vertical wall portion, and is a
　first die for molding from a blank to an intermediate product. A mold and a
　second mold for forming the intermediate product into the press-molded product are provided, and
　the second mold
　extends in a first direction and a second direction, and the first mold is provided. The top plate molding portion, which is the portion for molding the top plate portion, and the
　portion for molding the vertical wall portion, in which the portion extending in the direction of 1 and the portion extending in the second direction are connected via a curved portion. It has a vertical wall forming portion and
　a flange forming portion which is a portion for forming the flange portion, and an
　arbitrary position in the first direction is set to a first molding position, which is higher than the first molding position. Assuming that the position on the curved portion side is referred to as the second molding position, the height from the flange molding portion to the top plate molding portion is the first from the first molding position to the second molding position. product height H 1 'from the second product height H 2 changes' to,
　corresponds to the portion corresponding to the top plate at the intermediate product intermediate top panel section, the vertical wall portion in the intermediate product Assuming that the portion is referred to as an intermediate vertical wall portion and the portion corresponding to the flange portion in the intermediate product is referred to as an intermediate flange portion,
　the first mold is an
　intermediate ceiling portion for molding the intermediate top plate portion. Plate molding part and
　The intermediate vertical wall molding portion which is a portion for molding the intermediate vertical wall
　portion and the intermediate flange molding portion which is a portion for molding the intermediate flange portion are provided , and the intermediate vertical wall portion is formed at
　the first molding position. The line length of the cross section of the wall forming portion perpendicular to the first direction is the first intermediate vertical wall line length d 1 ', and the first direction of the intermediate vertical wall forming portion at the second forming position. The line length of the cross section perpendicular to is the second intermediate vertical wall line length d 2 ', and the height from the intermediate flange molding portion to the intermediate top plate molding portion at the first molding position is the first molding height. h 1 ', the height from the intermediate flange molding portion to the intermediate top plate molding portion at the second molding position is the second molding height h 2 ', the vertical wall molding portion at the first molding position. The line length of the cross section perpendicular to the first direction is the first vertical wall line length D 1 ', and the cross section of the vertical wall molding portion at the second molding position is perpendicular to the first direction. Assuming that the line length is referred to as the second vertical wall line length D 2 ',
　the first mold and the second mold have a
　first intermediate vertical wall line length d 1 '/ first vertical. Wall line length D 1 ': 0.80 to 1.20,
　second intermediate vertical wall line length d 2'/ Second vertical wall line length D 2 ': 0.80 ~ 1.20,
　the second forming height h 2 '/ first forming height h 1 ': 0.80 ~ 1.20,
the Press-molded product manufacturing equipment that is configured to meet.