Specification
Title of invention: Mold device
Technical field
[0001]
　The present invention relates to a mold device.
Background technology
[0002]
　Automotive structural members such as front side members, cross members, A-pillars, and B-pillars are manufactured by drawing a material (eg, a metal plate). For draw forming, a mold apparatus including an upper mold composed of a die and a lower mold composed of a punch and a holder is generally used.
[0003]
　In draw forming, for example, the outer edge of the material is pressed against the die by the holder, and the central portion of the material is pushed toward the die by a punch. As a result, a molded product having a desired shape is produced.
[0004]
　In the process of drawing, inflow resistance is generated at the outer edge of the material due to the pressing force of the holder against the die. Therefore, the material can be molded with tension applied to the material, and the occurrence of wrinkles due to the excess material during molding is suppressed.
[0005]
　In recent years, high-strength steel having a tensile strength of 590 MPa or more and further 980 MPa or more has been used as a material for structural members for automobiles in order to improve collision safety and reduce the weight of the vehicle body.
[0006]
　However, the moldability of the material decreases as the strength of the material increases. Therefore, when drawing and forming a material made of high-strength steel, if the inflow resistance generated at the outer edge of the material is too large, the plate thickness of each part of the molded product may decrease and the molded product may crack. ..
[0007]
　The occurrence of cracks as described above can be suppressed by reducing the pressing force of the holder and reducing the inflow resistance generated at the outer edge of the material. However, if the inflow resistance generated at the outer edge of the material becomes small, the material cannot be stretched properly, and wrinkles due to the excess material may occur.
[0008]
　Therefore, conventionally, a device capable of suppressing the occurrence of cracks and wrinkles as described above has been proposed. For example, Patent Document 1 discloses a press parts manufacturing apparatus. The manufacturing apparatus disclosed in Patent Document 1 includes a first die provided on the press bolster and a second die provided on the press slide. The first die includes a punch die fixed to the press bolster and a blank holder arranged outside the punch die. The second die includes a movable pad provided on the press slide, a bending blade arranged outside the movable pad, and a catcher arranged outside the bending blade so as to move in conjunction with the movable pad. It has an outer cam located on the outside of the catcher.
[0009]
　In the manufacturing apparatus of Patent Document 1, the outer edge of the blank is sandwiched by the blank holder and the bending blade, and the center of the blank is sandwiched by the movable pad and the punch die, and the center of the blank is bent by the punch die. By pushing it toward the blade side, draw forming is performed. In this case, the portion sandwiched by the movable pad and the punch die is suppressed from being deformed in the thickness direction in the molding process. Therefore, it is possible to suppress the occurrence of wrinkles in the portion narrowed by the movable pad and the punch die without increasing the pressing force of the blank holder more than necessary. As a result, it is possible to suppress the occurrence of cracks and wrinkles in the molded product.
[0010]
　By the way, when taking out a molded product after drawing molding in the above-mentioned manufacturing apparatus, it is necessary to release the first mold and the second mold. However, even after press molding, a force is applied to the movable pad and the blank holder in the direction of approaching each other. Therefore, if the first mold and the second mold are simply released, the movable pad is formed. And the molded product is deformed at the time of mold release due to the pressure from the blank holder.
[0011]
　In order to prevent the above-mentioned deformation of the molded product, the manufacturing apparatus of Patent Document 1 is provided with a joint link swingably supported by the blank holder. Specifically, in the manufacturing apparatus of Patent Document 1, by locking the joint link and the catcher at the bottom dead center of molding, it is possible to prevent the movable pad and the blank holder from moving in the direction of approaching each other. As a result, it is possible to prevent the molded product from being deformed by the pressure from the movable pad and the blank holder at the time of mold release.
Prior art literature
Patent documents
[0012]
Patent Document 1: Japanese Unexamined Patent Publication No. 2017-170482
Outline of the invention
Problems to be solved by the invention
[0013]
　By the way, in the manufacturing apparatus of Patent Document 1, in order to lock the joint link and the catcher, the outer cam of the second mold is moved toward the first mold to move the outer cam and the joint link. It is necessary to make contact and rotate the joint link toward the inside of the mold.
[0014]
　As a result of detailed studies by the present inventors, it has been found that the joint link and the outer cam are easily worn in the manufacturing apparatus of Patent Document 1. Specifically, in the manufacturing apparatus of Patent Document 1, since the joint link is provided in the first mold and the outer cam is provided in the second mold, the distance between the center of gravity of the joint link and the center of gravity of the outer cam Becomes larger. For this reason, it becomes difficult to improve the relative positional accuracy between the joint link and the outer cam, and when the joint link and the outer cam come into contact with each other, the joint link and the outer cam are not considered in the design. A directional load may be applied. This makes the joint link and outer cam more susceptible to damage. As a result, it becomes difficult to reduce the maintenance cost of the manufacturing equipment.
[0015]
　An object of the present invention is to provide a mold device having excellent durability.
Means to solve problems
[0016]
　The gist of the present invention is the following mold device.
[0017]
(1) The first mold unit having a punch and a holder, and a second mold unit having a pad arranged to face the punch and a die arranged to face the holder. By moving in the pressing direction so that the mold unit and the second mold unit are relatively close to each other, a plate-like shape arranged between the first mold unit and the second mold unit. A mold device for press-molding a material,
　which is a distance member oscillatingly supported by the holder and a
　moving device provided on the first mold unit and oscillating the distance member. ), The
　holder is provided so as to be movable in the press direction with respect to the punch, the
　pad is provided so as to be movable in the press direction with respect to the die, and the
　distance member is provided with the distance member. It can swing between the original position that does not come into contact with the second die and the prevention position that prevents the distance between the pad and the holder in the press direction from becoming less than a predetermined distance, and in the
　press direction, When the direction from the second mold unit to the first mold unit is the first direction and the opposite direction is the second direction, the
　rocking device has the holder with respect to the punch. A mold device that swings the distance member from the original position toward the prevention position as it moves relative to one direction.
[0018]
(2) The distance member receives a load in the first direction directly or indirectly from the pad at the prevention position, so that the distance between the pad and the holder in the pressing direction becomes equal to or less than the predetermined distance. The mold device according to (1) above, which prevents the mold from becoming.
[0019]
(3) The swing device transmits a force for swinging the distance member to the distance member at a position different from a position where the distance member directly or indirectly receives the load from the pad. , The mold device according to (2) above.
[0020]
(4) In the distance member, the distance between the position where the load is received and the swing center is larger than the distance between the position where the force is transmitted from the swing device and the swing center (3). The mold device described in.
[0021]
(5) In the distance member, the distance between the position where the load is received and the swing center is equal to or less than the distance between the position where the force is transmitted from the swing device and the swing center (3). The mold device described in.
[0022]
(6) The rocking device has a repulsive force generating unit and is directly or indirectly fixed to the punch, and the
　distance member moves the holder relative to the punch in the first direction. The repulsive force generating unit is pressed in the first direction, and the
　repulsive force generating unit is pressed in the first direction by the distance member to generate the repulsive force in the second direction.
　The distance member according to any one of (1) to (5) above, wherein the distance member receives a repulsive force in the second direction from the repulsive force generating unit and swings from the original position toward the prevention position. Mold device.
Effect of the invention
[0023]
　According to the present invention, a mold device having excellent durability can be obtained.
A brief description of the drawing
[0024]
FIG. 1 is a diagram showing a schematic configuration of a mold apparatus according to an embodiment of the present invention.
FIG. 2 is a diagram for explaining the operation of the mold device of FIG.
FIG. 3 is a diagram for explaining the operation of the mold device of FIG.
FIG. 4 is a diagram for explaining the operation of the mold device of FIG.
5 is a diagram for explaining the operation of the mold apparatus of FIG. 1. FIG.
FIG. 6 is a diagram for explaining the operation of the mold device of FIG.
FIG. 7 is a perspective view showing a specific configuration of a mold apparatus according to an embodiment of the present invention.
8 is a cross-sectional view showing the internal structure of the mold apparatus of FIG. 7. FIG.
9 is a diagram for explaining the operation of the mold device of FIG. 7. FIG.
10 is a diagram for explaining the operation of the mold device of FIG. 7. FIG.
FIG. 11 is a diagram for explaining the operation of the mold device of FIG. 7.
FIG. 12 is a diagram for explaining the operation of the mold device of FIG. 7.
FIG. 13 is a diagram for explaining the operation of the mold device of FIG. 7.
FIG. 14 is a diagram for explaining a modified example of the swinging portion.
FIG. 15 is a diagram for explaining a modification of the swing device.
FIG. 16 is a perspective view showing a mold apparatus according to another embodiment of the present invention.
FIG. 17 is a cross-sectional view showing the internal structure of the mold apparatus of FIG.
FIG. 18 is a diagram for explaining the operation of the mold device of FIG.
FIG. 19 is a diagram for explaining the operation of the mold device of FIG.
FIG. 20 is a diagram for explaining the operation of the mold device of FIG.
FIG. 21 is a diagram for explaining the operation of the mold device of FIG.
FIG. 22 is a diagram for explaining the operation of the mold device of FIG.
FIG. 23 is a diagram showing an example of a pressed part.
FIG. 24 is a diagram showing a donut-shaped component.
FIG. 25 is a diagram showing a cylindrical part.
FIG. 26 is a diagram showing a spherical component.
FIG. 27 is a diagram showing a ring-shaped component.
FIG. 28 is a diagram showing a ring-shaped component.
FIG. 29 is a diagram showing a ring-shaped component.
FIG. 30 is a diagram showing a ring-shaped component.
FIG. 31 is a diagram showing a B-pillar.
FIG. 32 is a diagram showing an A pillar lower.
FIG. 33 is a diagram showing a front side member.
FIG. 34 is a diagram showing a roof rail.
Mode for carrying out the invention
[0025]
(Outline of Mold Device)
　Hereinafter, a mold device according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a schematic configuration of a mold apparatus according to an embodiment of the present invention. 2 to 6 are diagrams for explaining the operation of the mold device of FIG. 1. 1 to 6 are provided with arrows indicating the X and Z directions orthogonal to each other. In the present specification, the X direction is the width direction of the mold device. The Z direction is the vertical direction. In the following, the X direction is described as the width direction X, and the Z direction is described as the vertical direction Z.
[0026]
　As shown in FIG. 1, the mold device 100 includes a first mold (lower mold) unit 20, a second mold (upper mold) unit 22, a distance member 24, and a swing device 26. There is. Although detailed description is omitted, the die device 100 is used by being attached to, for example, a known press machine (not shown). In the following, a die device 100 for manufacturing a press part 200 having a cross-sectional hat shape (see FIG. 6 described later) from a plate-shaped material 300 will be described, but the die device 100 is manufactured by the die device according to the present invention. The pressed parts to be produced are not limited to the pressed parts 200 shown in FIG. Further, the configuration and operation of the mold apparatus according to the present invention are not limited to the following embodiments, and the configuration and operation of the mold apparatus are appropriately changed depending on the shape of the pressed parts to be manufactured.
[0027]
　The first mold unit 20 and the second mold unit 22 are arranged so as to face each other in the vertical direction Z. The mold device 100 according to the present embodiment moves in the pressing direction so that the first mold unit 20 and the second mold unit 22 are relatively close to each other, so that the first mold unit 20 and the second mold unit 20 are relatively close to each other. This is an apparatus for press-molding a plate-shaped material 300 arranged between the mold unit 22 and the mold unit 22.
[0028]
　In this embodiment, the vertical direction Z corresponds to the press direction. Further, in the present embodiment, in the pressing direction, the direction from the second mold unit 22 to the first mold unit 20 is the first direction Z1, and the direction from the first mold unit 20 to the second mold unit 22. Is the second direction Z2.
[0029]
　The first mold unit 20 includes a punch 32 and a holder 34. The second mold unit 22 includes a die 36 and a pad 38. In the vertical direction Z, the die 36 is provided so as to face the holder 34, and the pad 38 is provided so as to face the punch 32. The holder 34 is provided so as to be movable in the vertical direction Z with respect to the punch 32, and the pad 38 is provided so as to be movable in the vertical direction Z with respect to the die 36.
[0030]
　The distance member 24 is swingably supported by the holder 34. In the present embodiment, the distance member 24 swings between the original position (position shown in FIG. 1) that does not contact the second mold unit 22 and the prevention position (position shown in FIGS. 4 and 5) described later. It is supported by the holder 34 so that it can be used. Although the details will be described later, in the in-situ position, no load is applied from the second mold unit 22 to the distance member 24. On the other hand, in the prevention position, a load in the first direction Z1 is applied to the distance member 24 from the pad 38 of the second mold unit 22.
[0031]
　The rocking device 26 is provided in the first mold unit 20 so that the distance member 24 can be rocked. In the present embodiment, the rocking device 26 moves the distance member 24 from the original position (position shown in FIG. 1) to the prevention position (FIG. 1) as the holder 34 moves relative to the punch 32 in the first direction Z1. It is a device that swings toward (positions shown in 4 and 5). In FIG. 1, the rocking device 26 is connected to the punch 32, but the rocking device 26 may be provided on any component of the first mold unit 20.
[0032]
　Hereinafter, an example of the operation of the mold apparatus 100 when press forming the material 300 will be briefly described. When press forming is performed using the mold device 100, first, as shown in FIG. 1, a plate-shaped material 300 is arranged on the punch 32 and the holder 34. At this time, the first mold unit 20 and the second mold unit 22 are separated from each other in the vertical direction Z. In FIG. 1, each component of the mold apparatus 100 is in an in-situ state. The distance member 24 is separated from the second mold unit 22 in the original position. In other words, in the in-situ position, the distance member 24 is not loaded by the second mold unit 22.
[0033]
　Next, as shown in FIGS. 2 and 3, the first mold unit 20 and the second mold unit 22 move in the direction of approaching each other in the vertical direction Z. Specifically, first, as shown in FIG. 2, the die 36 of the second mold unit 22 moves relative to the first mold unit 20 in the first direction Z1. As a result, the material 300 is sandwiched between the punch 32 and the holder 34, and the pad 38 and the die 36. In FIG. 2, the distance member 24 is in the original position.
[0034]
　As shown in FIG. 3, the die 36 is further moved relative to the first direction Z1 with respect to the first mold unit 20, so that the holder 34 and the die 36 are relative to the punch 32 and the pad 38. Moves to the first direction Z1. As a result, molding is started on the material 300.
[0035]
　As shown in FIG. 4, with respect to the punch 32 and the pad 38, the holder 34 and the die 36 further move in the first direction Z1 and reach the bottom dead center of molding (molding completion position) to reach a predetermined molding height. The pressed part 200 is obtained. Further, as shown in FIGS. 3 and 4, as the holder 34 moves relative to the punch 32 in the first direction Z1, the swing device 26 moves the distance member 24 from the original position to the prevention position. And rock.
[0036]
　In the state shown in FIG. 4, the movement of the pad 38 in the first direction Z1 relative to the holder 34 is regulated by the distance member 24. As a result, the distance between the holder 34 and the pad 38 in the vertical direction Z is maintained at a predetermined molding height or more. In other words, in the state shown in FIG. 4, the distance member 24 prevents the distance between the holder 34 and the pad 38 in the vertical direction Z from becoming a predetermined distance or less. In the present embodiment, the position (position shown in FIG. 4) of the distance member 24 that prevents the distance between the holder 34 and the pad 38 in the vertical direction Z from becoming less than a predetermined distance is referred to as a prevention position. In the preventive position, the distance member 24 receives a load from the pad 38 in the first direction Z1 by being connected to the pad 38. In FIG. 4, the distance member 24 is in contact with the pad 38 at the prevention position, but may be indirectly connected to the pad 38 via another member. That is, the distance member 24 may receive the load from the pad 38 in the first direction Z1 directly from the pad 38 or indirectly via another member.
[0037]
　Next, as shown in FIG. 5, the holder 34 and the pad 38 move relative to the punch 32 in the second direction Z2 together with the die 36. As a result, the punch 32 moves relative to the pad 38 in the first direction Z1. In other words, the punch 32 moves away from the pad 38.
[0038]
　Finally, as shown in FIG. 6, the first die unit 20 and the second die unit 22 are further separated in the vertical direction Z, and the press component 200 is taken out. Here, as described above, the distance between the holder 34 and the pad 38 in the vertical direction Z is held by the distance member 24 to be equal to or higher than a predetermined molding height. In other words, the pressure applied from the holder 34 to the second direction Z2 and the pressure applied from the pad 38 to the first direction Z1 are both received by the distance member 24. As a result, it is possible to prevent a large pressure from being applied to the pressed component 200 from the holder 34 and the pad 38. As a result, it is possible to prevent the pressed part 200 from being deformed at the time of mold release.
[0039]
　As described above, in the mold device 100 according to the present embodiment, the distance member 24 and the rocking device 26 for swinging the distance member 24 are both provided in the first mold unit 20. Therefore, the distance between the center of gravity of the distance member 24 and the center of gravity of the rocking device 26 in the vertical direction Z can be reduced as compared with the case where the rocking device 26 is provided in the second mold unit 22. As a result, when the distance member 24 and the swing device 26 are provided in the first mold unit 20, the relative positional accuracy between the distance member 24 and the swing device 26 can be improved. Therefore, when the force is transmitted from the swing device 26 to the distance member 24 (when swinging the distance member 24), the load in the direction not considered in the design is applied to the distance member 24 and the swing device 26. Can be sufficiently suppressed from being loaded. As a result, damage to the distance member 24 and the swing device 26 can be sufficiently suppressed. That is, the mold device 100 according to the present embodiment has excellent durability.
[0040]
　Further, by reducing the distance between the center of gravity of the distance member 24 and the center of gravity of the rocking device 26, the distance member 24 can be swung by a small operation of the rocking device 26. Therefore, the rocking device 26 itself can be made compact. In this case, the distance between the center of gravity of the swing device 26 and the support position of the swing device 26 in the first mold unit 20 can be reduced. As a result, when the force is transmitted from the swing device 26 to the distance member 24, the moment of force applied from the distance member 24 to the swing device 26 can be reduced. As a result, damage to the swing device 26 can be sufficiently suppressed.
[0041]
　Further, by making the swing device 26 smaller, it is possible to improve the assembly accuracy of the swing device 26 in the first mold unit 20. As a result, when the distance member 24 and the swing device 26 come into contact with each other, it is possible to prevent an unnecessary load due to misalignment from being applied to the distance member 24 and the swing device 26. As a result, the distance member 24 can be smoothly swung with a small amount of power, and damage to the distance member 24 and the swing device 26 can be sufficiently suppressed.
[0042]
　Further, since the operating range and configuration of the swing device 26 can be reduced, the degree of freedom in designing the mold device 100 itself is increased. This makes it possible to appropriately arrange the distance member 24 and the swing device 26 even in a transfer type press machine in which the dimensions and configuration of the outer portion of the die device are strict.
[0043]
(Specific Configuration of Mold Device)
　Hereinafter, a specific configuration of the mold device according to the embodiment of the present invention will be described with reference to the drawings. FIG. 7 is a perspective view showing a specific configuration of a mold apparatus according to an embodiment of the present invention. FIG. 7 is provided with arrows indicating the X, Y, and Z directions that are orthogonal to each other. In the present specification, the X direction is the width direction of the mold device, and the Y direction is the length direction of the mold device. The Z direction is the vertical direction. In the following, the X direction is described as the width direction X, the Y direction is described as the length direction Y, and the Z direction is described as the vertical direction Z. 8 to 13 which will be described later also show arrows indicating the width direction X and the vertical direction Z.
[0044]
　FIG. 8 is a cross-sectional view showing the internal structure of the mold apparatus of FIG. In addition, in FIG. 8 and FIGS. 9 to 13 described later, a cross section perpendicular to the length direction of the mold apparatus is shown.
[0045]
　In the following, as an example, a die device 100a for manufacturing a pressed part 200 having a cross-sectional hat shape (see FIG. 13 described later) will be described.
[0046]
　As shown in FIGS. 7 and 8, the mold apparatus 100a includes a first mold (lower mold) unit 20, a second mold (upper mold) unit 22, a plurality of distance members 24, and a plurality of shakings. It includes a moving device 26, a plurality of returning devices 28, and a plurality of stopper devices 30.
[0047]
　The first mold unit 20 and the second mold unit 22 are arranged so as to face each other in the vertical direction Z. The mold device 100a according to the present embodiment moves in the pressing direction so that the first mold unit 20 and the second mold unit 22 are relatively close to each other, so that the first mold unit 20 and the second mold unit 20 and the second mold unit 22 are relatively close to each other. This is an apparatus for press-molding a plate-shaped material 300 arranged between the mold unit 22 and the mold unit 22.
[0048]
　In this embodiment, the vertical direction Z corresponds to the press direction. Further, in the present embodiment, in the pressing direction, the direction from the second mold unit 22 to the first mold unit 20 is the first direction Z1, and the direction from the first mold unit 20 to the second mold unit 22. Is the second direction Z2.
[0049]
　The first mold unit 20 includes a punch 32 and a holder 34. The punch 32 has a base portion 32a fixed to a bolster of a press machine (not shown), and a punch body portion 32b protruding from the base portion 32a in the second direction Z2 (upward). In the present embodiment, a convex portion 32c having a rectangular shape in a plan view is formed in the central portion of the base portion 32a, and a punch main body portion 32b is provided so as to project from the convex portion 32c in the second direction Z2.
[0050]
　The holder 34 includes a holder main body 34a having a hollow and rectangular shape in a plan view, and a plurality of (four in the present embodiment) rocking support portions 34b protruding from both side surfaces of the holder main body 34a in the width direction X. Have. The holder main body 34a is supported by a plurality of support pins 35 extending in the vertical direction Z. The punch body portion 32b of the punch 32 is provided so as to penetrate the holder body portion 34a of the holder 34 in the vertical direction Z. In the present embodiment, the holder main body 34a is provided so as to be movable in the vertical direction Z with respect to the punch main body 32b. In the present embodiment, four swing support portions 34b are provided so as to correspond to the four distance members 24. Each rocking support portion 34b is formed with a recess 34d having a substantially arcuate cross section so as to open in the second direction Z2.
[0051]
　The plurality of support pins 35 are provided so as to penetrate the base portion 32a of the punch 32 in the vertical direction Z and movable in the vertical direction Z with respect to the punch 32. In the present embodiment, a force F1 in the first direction Z1 is applied to the holder 34 from a die cushion device of a press machine (not shown) via a plurality of support pins 35. As a result, the holder 34 is urged toward the second mold unit 22. Although detailed description is omitted, the holder 34 may be urged by using another device such as a gas spring device or a coil spring built in the punch 32 instead of the support pin 35 and the die cushion device. ..
[0052]
　In the present embodiment, the movement of the holder main body 34a is restricted so that the holder main body 34a does not protrude from the punch main body 32b in the second direction Z2. Further, in the present embodiment, in a state where the force of the first direction Z1 is not applied from the second mold unit 22 to the holder 34 (the original positions of the punch 32 and the holder 34), the upper surface of the punch body 32b and the holder body The punch 32 and the holder 34 are provided so that the upper surface of the portion 34a is at the same height. However, the positional relationship between the punch and the holder can be appropriately changed according to the shape and the like of the pressed parts to be manufactured.
[0053]
　The distance member 24 is swingably supported by the holder 34. Specifically, the distance member 24 swings between the original position (position shown in FIG. 8) that does not contact the second mold unit 22 and the prevention position (position shown in FIGS. 11 and 12) described later. It is supported by the holder 34 so that it can be used.
[0054]
　In the present embodiment, the distance member 24 has a rod-shaped rocking portion 24a, a pair of plate-shaped arm portions 24b, and a pair of columnar pressing portions 24c. One end (lower end) of the swing portion 24a is fitted into the recess 34d of the swing support portion 34b so as to be swingable in the width direction X. As a result, the swing portion 24a is supported by the swing support portion 34b so as to be swingable in the width direction X with the lower end portion as the swing center. Although detailed description will be omitted, the swinging portion 24a may be swingably supported (rotatably) by the swinging support portion 34b via a support shaft extending in the length direction Y.
[0055]
　One end of the pair of arm portions 24b in the width direction X is fixed to the lower end portion of the swing portion 24a. Pressing portions 24c are fixed to the other ends of the pair of arm portions 24b in the width direction X, respectively.
[0056]
　The rocking device 26 is provided in the first mold unit 20. Although details will be described later, the rocking device 26 moves the distance member 24 from the original position (position shown in FIG. 8) to the prevention position (as the holder 34 moves relative to the punch 32 in the first direction Z1. It is a device that swings toward (positions shown in FIGS. 11 and 12). In this embodiment, four swing devices 26 are provided so as to correspond to the four distance members 24. Each rocking device 26 has a pair of elastic members 26a and a pair of transmission members 26b. In this embodiment, the elastic member 26a is a coil spring. Hereinafter, the elastic member 26a will be referred to as a coil spring 26a.
[0057]
　The transmission member 26b has a shaft portion 6a extending in the vertical direction Z, a flange portion 6b provided at the upper end portion of the shaft portion 6a, and a flange portion 6c provided at the lower end portion of the shaft portion 6a. The lower end side of the shaft portion 6a and the flange portion 6c are inserted into the punch 32 (base portion 32a) so as to be movable in the vertical direction Z. A coil spring 26a is fitted on the outside of the shaft portion 6a so as to be sandwiched between the flange portion 6b and the base portion 32a. The coil spring 26a is provided so as to push the flange portion 6b toward the second direction Z2 (upward). In the present embodiment, the flange portion 6c is locked to the base portion 32a to restrict the movement of the transmission member 26b in the second direction Z2. In the present embodiment, the rocking device 26 is provided so that the pressing portion 24c is located on the flange portion 6b at the original position of the distance member 24. In the original position of the distance member 24, the flange portion 6b and the pressing portion 24c may be in contact with each other, or the flange portion 6b and the pressing portion 24c may be separated from each other in the vertical direction Z. However, even when the flange portion 6b and the pressing portion 24c are separated, it is preferable that the distance between the flange portion 6b and the pressing portion 24c in the vertical direction Z is small.
[0058]
　In this embodiment, four return devices 28 are provided so as to correspond to the four distance members 24. In the present embodiment, each return device 28 is provided on the swing support portion 34b of the holder 34. Although detailed description will be omitted, the return device 28 includes a coil spring, is connected to the distance member 24, and urges the distance member 24 to return to the original position.
[0059]
　The second mold unit 22 includes a die 36 and a pad 38. The die 36 has a base portion 36a fixed to a slide of a press machine (not shown), and a die main body portion 36b protruding from the base portion 36a in the first direction Z1 (downward). The die main body 36b has a hollow and rectangular shape when viewed from below. The die main body 36b is provided so as to face the holder main body 34a of the holder 34 in the vertical direction Z.
[0060]
　The pads 38 include a pad body 38a extending in the length direction Y inside the die body 36b, and a plurality of pads 38 projecting from the pad body 38a in the width direction X so as to penetrate the die body 36b (4 in this embodiment). It has a locking portion 38b and a catcher portion 38c extending downward from each locking portion 38b. The pad body 38a is provided so as to face the punch body 32b of the punch 32 in the vertical direction Z. The locking portion 38b is provided so as to face the swing support portion 34b of the holder 34 in the vertical direction Z. In the present embodiment, the locking portion 38b and the catcher portion 38c are provided on the outside of the die main body portion 36b.
[0061]
　As shown in FIG. 8, a plurality of urging devices 40 are provided between the base portion 36a of the die 36 and the pad main body portion 38a of the pad 38. In the present embodiment, the urging device 40 includes, for example, a gas spring, and applies a force F2 in the second direction Z2 to the pad main body 38a. As a result, the pad 38 is urged toward the first mold unit 20. As the urging device 40, another device such as a coil spring may be used instead of the gas spring.
[0062]
　In the present embodiment, the die 36 and the pad 38 are provided so that the lower surface of the die body 36b and the lower surface of the pad body 38a are at equal heights at the original positions of the die 36 and the pad 38. The positional relationship between the die and the pad can be appropriately changed according to the shape and the like of the pressed parts to be manufactured.
[0063]
　A stopper device 30 is provided on each locking portion 38b. Although detailed description is omitted, the stopper device 30 refers to the holding member 30b and the holding member 30b that hold the stopper member 30a so as to be movable in the vertical direction Z between the stopper member 30a and the locking portion 38b. It has an elastic member 30c that urges the stopper member 30a downward. The stopper member 30a is provided so as to project in the first direction Z1 (downward) from the locking portion 38b at the original position.
[0064]
(Operation of the mold device)
　Next, the operation of the mold device 100a will be described. 9 to 13 are diagrams for explaining a method of manufacturing a pressed part by a mold apparatus. In the present embodiment, the pressed parts are manufactured from the raw material by carrying out the first to fifth steps described below.
[0065]
(First Step) As
　shown in FIG. 8, first, the plate-shaped material 300 is arranged on the punch 32 and the holder 34. At this time, the first mold unit 20 and the second mold unit 22 are separated in the vertical direction Z. In the first step, each component of the mold apparatus 100a is in the original position. The distance member 24 is separated from the second mold unit 22 in the original position. Further, in the original position, the upper end portion of the swing portion 24a of the distance member 24 is located outside the locking portion 38b in the width direction X. Further, in the original position, the upper end portion of the swing portion 24a and the lower end portion of the stopper member 30a face each other in the vertical direction Z.
[0066]
　As the material 300, for example, a high-strength material having a tensile strength of 590 to 1600 MPa can be used.
[0067]
(Second Step)
　Next, as shown in FIGS. 9 and 10, the first mold unit 20 and the second mold unit 22 move in the direction of approaching each other in the vertical direction Z. Specifically, first, as shown in FIG. 9, the second mold unit 22 (die 36) is relatively moved in the first direction Z1 with respect to the first mold unit 20 by a press machine (not shown). .. As a result, the material 300 is sandwiched between the punch main body 32b and the holder main body 34a, and the pad main body 38a and the die main body 36b. Further, the stopper member 30a of each stopper device 30 moves in the second direction Z2 relative to the locking portion 38b by being pushed by the swinging portion 24a. In FIG. 9, the distance member 24 is in the original position.
[0068]
　As shown in FIG. 10, the die 36 is further moved relative to the first direction Z1 with respect to the first mold unit 20, so that the holder 34 and the die 36 are relative to the punch 32 and the pad 38. Moves to the first direction Z1. As a result, molding is started on the material 300. Specifically, of the material 300, the central portion (the punch main body portion 32b and the pad) in the width direction X is relative to both end portions (the portion sandwiched between the holder main body portion 34a and the die main body portion 36b) in the width direction X. The portion sandwiched by the main body portion 38a) is pushed out toward the second direction Z2.
[0069]
　Further, by moving the holder 34 relative to the punch 32 in the first direction Z1, the distance member 24 provided in the holder 34 is relatively relative to the swing device 26 provided in the punch 32. Move to the first direction Z1. As a result, the transmission member 26b is pushed in the first direction Z1 by the pressing portion 24c, and the coil spring 26a is compressed. As a result, in the coil spring 26a, a repulsive force that pushes the transmission member 26b in the second direction Z2 is generated. That is, in the present embodiment, the coil spring (elastic member) 26a generates a repulsive force that generates a repulsive force in the second direction Z2 by being pressed against the Z1 in the first direction by the distance member 24 via the transmission member 26b. Functions as a department. The repulsive force in the second direction Z2 generated in the coil spring 26a is transmitted to the pressing portion 24c of the distance member 24 via the transmission member 26b. As a result, the force that causes the distance member 24 to swing (rotate) toward the inside of the mold device 100a with the lower end of the swing portion 24a as the swing center is applied from the swing device 26 to the distance member 24. Given. However, immediately after the start of molding on the material 300, the movement of the swinging portion 24a toward the inside of the mold device 100a is restricted by the locking portion 38b. That is, the locking portion 38b regulates the inward swing of the distance member 24.
[0070]
(Third Step) As
　shown in FIG. 11, the holder 34 and the die 36 are further moved in the first direction Z1 with respect to the punch 32 and the pad 38 to reach the bottom dead center of molding (molding completion position). , A pressed part 200 having a predetermined molding height is obtained. At this time, the distance member 24 moves in the first direction Z1 together with the holder 34, so that the repulsive force in the second direction Z2 generated in the rocking device 26 increases. That is, the force for swinging the distance member 24 toward the inside of the mold device 100a increases. In this state, by increasing the distance between the holder 34 and the pad 38 in the vertical direction Z, the swinging portion 24a can be moved inward, and the distance member 24 is instantaneously moved toward the inside of the mold device 100a. Swing to.
[0071]
　When the swinging portion 24a swings to a position where it contacts the catcher portion 38c, the stopper member 30a moves in the first direction Z1 by being pushed by the elastic member 30c. As a result, the swinging portion 24a is sandwiched between the catcher portion 38c and the stopper member 30a. As a result, the swing of the swing portion 24a is restricted. That is, the swing of the distance member 24 is regulated.
[0072]
　Further, in the state shown in FIG. 11, the movement of the pad 38 in the first direction Z1 relative to the holder 34 is regulated by the swing portion 24a of the distance member 24. As a result, the distance between the holder main body 34a of the holder 34 and the pad main body 38a of the pad 38 in the vertical direction Z is maintained at a predetermined molding height or more. In other words, in the state shown in FIG. 11, the distance member 24 prevents the distance between the holder 34 and the pad 38 in the vertical direction Z from becoming a predetermined distance or less. In the present embodiment, the position (position shown in FIG. 11) of the distance member 24 that prevents the distance between the holder 34 and the pad 38 in the vertical direction Z from becoming less than a predetermined distance is referred to as a prevention position.
[0073]
(Fourth Step)
　Next, as shown in FIG. 12, the die 36 moves relative to the first mold unit 20 in the second direction Z2. As a result, the holder 34 and the pad 38 move relative to the punch 32 in the second direction Z2 together with the die 36. As a result, the punch body 32b of the punch 32 moves relative to the pad body 38a of the pad 38 in the first direction Z1. In other words, the punch main body 32b moves relatively in the direction away from the pad main body 38a.
[0074]
　Here, as described above, the distance between the holder main body 34a and the pad main body 38a in the vertical direction Z is held by the swinging portion 24a of the distance member 24 to be equal to or higher than a predetermined molding height. In other words, both the pressure applied from the holder 34 to the second direction Z2 and the pressure applied from the pad 38 to the first direction Z1 are received by the swing portion 24a of the distance member 24. As a result, it is possible to prevent a large pressure from being applied to the pressed component 200 from the holder 34 and the pad 38. As a result, it is possible to prevent the pressed part 200 from being deformed at the time of mold release.
[0075]
(Fifth Step)
　Finally, as shown in FIG. 13, the first die unit 20 and the second die unit 22 are further separated in the vertical direction Z, and the pressed part 200 is taken out. At this time, the distance member 24 is returned to its original position by the return device 28.
[0076]
(Effect of the present embodiment)
　As described above, in the mold device 100a according to the present embodiment, the swing device 26 for swinging the distance member 24 and the distance member 24, similarly to the mold device 100 described above. Are both provided in the first mold unit 20. Therefore, like the mold device 100 described above, the mold device 100a can sufficiently suppress damage to the distance member 24 and the swing device 26. Further, similarly to the above-mentioned mold device 100, even when the mold device 100a is used in the transfer type press machine, the distance member 24 and the swing device 26 can be appropriately arranged.
[0077]
　Further, when the swing device is provided in the second mold unit 22, it is necessary to provide a member (for example, the outer cam of Patent Document 1) that can cover the distance member 24 from the outside. In this regard, in the present embodiment, the distance member 24 can be swung to the preventive position by pushing the distance member 24 in the second direction Z2 by the swing device 26. In this case, since the configuration of the swing device 26 can be simplified, the mold device 100a can be miniaturized.
[0078]
　As described above, the mold apparatus 100a according to the present embodiment has excellent durability and can be miniaturized.
[0079]
　Further, in the present embodiment, the swing device 26 generates a force for swinging the distance member 24 by the coil spring 26a. In this case, it is possible to generate a sufficient force while making the swing device 26 compact. Further, by using the coil spring 26a, the forming cycle of the pressed part 200 can be shortened, and the productivity can be improved. Moreover, since the control of the swing device 26 is unnecessary, the production cost can be reduced.
[0080]
　Further, in the mold device 100a according to the present embodiment, the swinging device 26 receives a force for swinging the distance member 24 at a position where the distance member 24 receives a load from the pad 38 (in the present embodiment, swinging). It is transmitted to the distance member 24 at a position different from the upper end portion of the portion 24a (the pressing portion 24c in the present embodiment). In this case, damage to the distance member 24 can be sufficiently suppressed as compared with the case where the position where the load is received and the position where the force for swinging is transmitted are the same position on the distance member 24.
[0081]
　Further, in the mold apparatus according to the present embodiment, for example, as shown in FIG. 14, the angle of the swing portion 24a at the in-situ position may be changed. Specifically, in the original position, the position of the upper end of the swing portion 24a may be adjusted to a height substantially equal to the upper surface of the holder 34 and the punch 32. In this case, for example, when the mold apparatus is used in a transfer type press machine, the arrangement of the material 300 and the removal of the pressed parts 200 can be facilitated, and the manufacturing efficiency can be improved.
[0082]
　In the distance member 24, the distance between the position where the load is received and the swing center may be set larger than the distance between the position where the force for swinging is transmitted and the swing center. In this case, the distance member 24 can be quickly moved from the original position to the preventive position. On the other hand, in the distance member 24, the distance between the position where the load is received and the swing center may be set to be equal to or less than the distance between the position where the force for swinging is transmitted and the swing center. In this case, the distance member 24 can be swung with a small force.
[0083]
　In the above-described embodiment, the case where the rocking device 26 is attached to the punch 32 has been described, but the rocking device may be attached to a component of the first mold unit other than the punch 32. For example, the rocking device may be attached to another component fixed to the bolster.
[0084]
　The configuration of the rocking device is not limited to the above example, and the rocking device moves the distance member from the original position to the prevention position as the holder moves relative to the punch in the first direction. It suffices if it is configured to swing. Therefore, for example, an actuator such as an air cylinder, a hydraulic cylinder, an electric cylinder, or an electric motor may be used as the swing device. When an actuator is used as the swinging device, for example, the swinging device is attached to the holder 34 of the first mold unit 20, and the rotating shaft connected to the distance member is rotated by the swinging device to swing the distance member. You may move it. When an actuator is used as the swing device as described above, the actuator can also function as a return device. In this case, the configuration of the mold apparatus can be further simplified. Further, in the above-described embodiment, the case where the coil spring is used as the repulsive force generating part of the rocking device has been described, but the repulsive force generating part includes a tension spring, a torsion coil spring, a leaf spring, a rubber, an accumulator, and a gas spring. Etc. may be used alone or in combination. For example, as in the swing device 26 shown in FIG. 15, a gas spring 60 embedded in the punch 32 may be used instead of the coil spring 26a (see FIG. 8). In this case, the gas spring 60 is pressed in the first direction Z1 by the distance member 24 via the transmission member 26b to generate a repulsive force in the second direction Z2. As a result, the transmission member 26b is urged in the second direction Z2.
[0085]
　Further, in the above-described embodiment, the case where the four distance members 24 and the four rocking devices 26 are provided has been described, but the number of the distance members 24 and the rocking devices 26 may be three or less. It may be one or more. Specifically, the number and arrangement of the distance member 24 and the swinging device 26 can be appropriately changed in consideration of molding conditions such as a press load and a load distribution.
[0086]
　Further, the shape of the swing portion 24a is not limited to the above example. Specifically, the swinging portion 24a does not have to be rod-shaped.
[0087]
　Further, in the above-described embodiment, the distance member 24 prevents the distance between the pad 38 and the holder 34 in the vertical direction Z from becoming less than a predetermined distance by directly receiving the load from the pad 38 at the prevention position. ing. However, when the distance member 24 indirectly receives the load from the pad 38 via another member at the prevention position, the distance between the pad 38 and the holder 34 in the vertical direction Z becomes equal to or less than a predetermined distance. It may be prevented.
[0088]
　Further, in the above-mentioned mold device 100a, the return device 28 is used to return the distance member 24 to the original position. However, for example, as in the mold device 100b shown in FIGS. 16 and 17, the return device 28 Alternatively, the weight portion 50 may be attached to the distance member 24, and the distance member 24 may be returned to its original position by the weight of the distance member 24. Further, although detailed description will be omitted, the return device may be configured by using a torsion coil spring, or may be configured by using an actuator such as an air cylinder, a hydraulic cylinder, an electric cylinder or an electric motor.
[0089]
　Further, in the above-mentioned mold device 100a, in order to surely regulate the swing of the distance member 24 at the prevention position, the catcher portion 38c is formed on the pad 38, and the stopper device 30 is provided on the pad 38. However, if the distance member 24 can be prevented from swinging by sandwiching the distance member 24 between the holder 34 and the pad 38 at the prevention position, the catcher portion 38c and the catcher portion 38c and the mold device 100b shown in FIGS. 16 and 17 can be prevented. The stopper device 30 may not be provided.
[0090]
　Although detailed description is omitted, as shown in FIGS. 17 to 22, when the mold device 100b is used, the material 300 is carried out by carrying out the same steps as in the case of using the mold device 100a described above. Pressed parts 200 can be manufactured from.
[0091]
　The present invention can be applied to various shapes of pressed parts, various pressing methods, and various materials. For example, the present invention can also be used when manufacturing the pressed part 10 shown in FIG. 23. With reference to FIG. 23, the pressed component 10 has a hat-shaped cross-sectional shape. The pressed component 10 has a top plate 11, vertical walls 12a and 12b extending in the vertical direction, and flanges 13a and 13b. The upper ends of the vertical walls 12a and 12b are connected to the top plate 11 via ridges 14a and 14b that are curved so as to be convex toward the outside of the press component 10. Further, the lower ends of the vertical walls 12a and 12b are connected to the flanges 13a and 13b via ridges 15a and 15b that are recessed toward the inside of the press component 10. The pressed component 10 has curved portions 16 and 17 that are curved in the height direction of the vertical walls 12a and 12b when viewed from the normal direction of the vertical walls 12a and 12b. When manufacturing such a pressed part 10, the shapes of each part of the first die unit and the second die unit may be adjusted according to the shape of the pressed part 10.
[0092]
　Further, although detailed description will be omitted, in addition to the parts having a hat-shaped cross section, the present invention includes, for example, a donut-shaped part shown in FIG. 24, a cylindrical part shown in FIG. 25, a spherical part shown in FIG. Manufactures ring-shaped parts shown in FIGS. 27 to 30, A-pillar, B-pillar shown in FIG. 31, A-pillar lower shown in FIG. 32, front side member shown in FIG. 33, rear side member, rear floor side member, and roof rail shown in FIG. 34. It can also be used when doing.
Code description
[0093]
　100, 100a, 100b Mold device
　20 1st mold unit
　22 2nd mold unit
　24 Distance member
　26 Swing device
　28 Return device
　30 Stopper device
　32 Punch
　34 Holder
　36 Die
　38 Pad
　40 Biasing device

The scope of the claims
[Claim 1]
　The first mold unit including a first mold unit having a punch and a holder, and a second mold unit having a pad arranged to face the punch and a die arranged to face the holder. By moving in the pressing direction so that the second mold unit and the second mold unit are relatively close to each other, a plate-shaped material arranged between the first mold unit and the second mold unit is pressed. a mold apparatus for molding,
　a distance member which is swingably supported on the holder,
　provided on the first mold unit, and provided with a swinging device for swinging the distance member,
　the The holder is provided so as to be movable in the press direction with respect to the punch, the
　pad is provided so as to be movable in the press direction with respect to the die, and the
　distance member does not come into contact with the second mold. It can swing between the original position and the prevention position that prevents the distance between the pad and the holder in the press direction from becoming less than a predetermined distance, and in the
　press direction, from the second mold unit. When the direction toward the first mold unit is the first direction and the opposite direction is the second direction, the
　rocking device moves the holder relative to the punch in the first direction. A mold device that swings the distance member from the original position toward the prevention position according to the above.
[Claim 2]
　When the distance member receives a load in the first direction directly or indirectly from the pad at the prevention position, the distance between the pad and the holder in the pressing direction becomes equal to or less than the predetermined distance. The mold device according to claim 1 to prevent.
[Claim 3]
　The rocking device claims to transmit a force for swinging the distance member to the distance member at a position different from a position where the distance member directly or indirectly receives the load from the pad. 2. The mold device according to 2.
[Claim 4]
　The gold according to claim 3, wherein in the distance member, the distance between the position where the load is received and the swing center is larger than the distance between the position where the force is transmitted from the swing device and the swing center. Mold device.
[Claim 5]
　The gold according to claim 3, wherein in the distance member, the distance between the position where the load is received and the swing center is equal to or less than the distance between the position where the force is transmitted from the swing device and the swing center. Mold device.
[Claim 6]
　The rocking device has a repulsive force generating portion and is directly or indirectly fixed to the punch, and the
　distance member is as the holder moves relative to the punch in the first direction. , The repulsive force generating unit is pressed in the first direction, and the
　repulsive force generating unit is pressed in the first direction by the distance member to generate the repulsive force in the second direction, and the
　distance member. The mold device according to any one of claims 1 to 5, wherein receives a repulsive force in the second direction from the repulsive force generating unit and swings from the original position toward the preventive position.