Press molding device and method for manufacturing molded article

Abstract

A press forming device is provided with a first die and a second die which are positioned at positions facing each other in a press direction and which move relative to each other in the press direction. The first die includes a first support surface and a punch portion protruding from the first support surface. The second die is provided with: a press surface disposed at a position offset from a position facing the punch portion in the press direction; and a wall surface that is continuous with the press surface. When viewed from the second die side in the pressing direction, the punch portion has a side surface facing the wall surface and including an opening portion that opens toward the wall surface side. When a bottom dead center is formed by relative movement between the first die and the second die in the pressing direction, the wall surface is opposite to the side surface of the punch part.

Description

Technical Field

[0001] The present invention relates to a press forming device and a method for manufacturing a formed product. Background Art

[0002] Conventionally, from the perspective of reducing the weight and increasing the strength of automobiles, formed products made of high-tensile steel sheets have been used as structural members of vehicle bodies (e.g., members constituting vehicle frames). Figure 1 The molded product 1 having a closed cross-sectional shape shown in (a) and Figure 1 The hat-shaped molded product 2 shown in (b).

[0003] Figure 1 The molded product 1 having a closed cross-sectional shape shown in (a) has plate-like flanges 1a, 1b, vertical walls 1c, 1d and a top plate 1e. The molded product 1 has a closed cross-sectional shape, and the flange 1a and the top plate 1e are arranged in a manner that the vertical wall 1c and the vertical wall 1d are arranged in a manner that the flange 1a and the top plate 1e are opposite to each other, and the vertical wall 1c and the vertical wall 1d are opposite to each other.

[0004] The molded product 1 can be manufactured by roll forming or press forming, for example. However, when roll forming is used as disclosed in Patent Document 1, a plurality of rolls need to be arranged in a row, which increases the size of the molding device.

[0005] Prior art literature

[0006] Patent Literature

[0007] Patent Document 1: Japanese Patent Application Publication No. 2008-120227 Summary of the invention

[0008] Problem that the invention aims to solve

[0009] On the other hand, in the case of using stamping forming, the forming device can be configured to be small compared to the case of using roll forming. However, in order to manufacture a molded product having a flange portion facing the top plate portion such as the molded product 1, there arises a problem that a core is required or the number of steps increases. In this case, the production efficiency of the molded product deteriorates.

[0010] also, Figure 1 The hat-shaped molded product 2 shown in (b) can be manufactured by conventional bending or drawing using a known mold without using a core. Figure 1As shown in (c), when a pair of longitudinal wall portions 2a and 2b are provided with convex portions 2c and 2d protruding inward (for example, a cylindrical portion formed by flanging), it is necessary to prevent the convex portions 2c and 2d from contacting the mold during forming. Therefore, it is difficult to manufacture the molded product 2 having the convex portions 2c and 2d by conventional bending forming or drawing forming using a known mold. In addition, since the convex portions 2c and 2d are concave portions when viewed from the outside, they can also be called concave portions.

[0011] Therefore, an object of the present invention is to provide a press forming apparatus and a manufacturing method capable of efficiently manufacturing a formed product.

[0012] Solutions for solving problems

[0013] (1) A technical solution of the present invention provides a stamping forming device, wherein the stamping forming device comprises a first die and a second die, the first die and the second die are located at positions opposite to each other in a stamping direction and move relative to each other in the stamping direction, the first die comprises a first supporting surface and a punch portion protruding from the first supporting surface, and the second die comprises: a stamping surface, which is arranged at a position offset from a position opposite to the punch portion in the stamping direction; and a wall surface, which is continuous with the stamping surface, when viewed from the side of the second die in the stamping direction, the punch portion has a side surface opposite to the wall surface and including an opening portion opening to the wall surface side, and when the first die and the second die are at the lower dead point of the relative movement in the stamping direction, the wall surface is opposite to the side surface of the punch portion.

[0014] (2) In the above-mentioned stamping forming device, it may also be that the punch head has a plurality of support parts, the side surface of the punch head is composed of the side surfaces of the plurality of support parts, and the side surfaces of two adjacent support parts among the plurality of support parts are arranged at intervals across the opening part.

[0015] (3) In the above-mentioned stamping forming device, the opening portion may also have a connecting portion connecting two adjacent supporting portions among the plurality of supporting portions, and when viewed from the second mold side in the stamping direction, the distance between the side surface of the connecting portion and the wall surface is longer than the distance between the side surface of the supporting portion and the wall surface.

[0016] (4) In the above-mentioned stamping forming device, the opening portion may also have a connecting portion connecting two adjacent support portions among the multiple support portions, and in the stamping direction, the position of the top of at least one support portion of the multiple support portions is different from the position of the top of the connecting portion adjacent to the support portion.

[0017] (5) In the above-mentioned press forming apparatus, the position of the top of at least one of the plurality of support portions may be different from the positions of the tops of the other support portions in the press direction.

[0018] (6) In the above-mentioned press forming apparatus, the second die may include a backing plate disposed at a position opposing the punch head in the press direction.

[0019] (7) Another technical solution of the present invention provides a method for manufacturing a formed product, wherein the blank is stamped by relatively moving a first die and a second die that are opposite to each other in the stamping direction across the blank, the first die comprising a first supporting surface and a punch portion protruding from the first supporting surface, the second die comprising: a stamping surface that is arranged at a position offset from a position opposite to the punch portion in the stamping direction; and a wall surface that is continuous with the stamping surface, the blank comprising a first plate-like portion and a wall surface that is opposite to the first plate-like portion in the stamping direction. The second plate-like portion is supported by the first supporting surface from the first die side and supported by the punch head that crosses the first plate-like portion in the stamping direction from the first die side, and the second plate-like portion is bent and deformed by the stamping surface that moves relative to the punch head in the stamping direction. When the forming lower dead point of the relative movement between the first die and the second die in the stamping direction is reached, the wall surface is opposite to the side surface of the punch head across a part of the second plate-like portion.

[0020] (8) In the above manufacturing method, when the second plate-shaped portion is supported by the punch portion, the punch portion may traverse the first plate-shaped portion by passing through a through hole formed in the first plate-shaped portion.

[0021] (9) Another technical solution of the present invention provides a method for manufacturing a formed product, wherein the blank is stamped by relatively moving a first die and a second die that are opposite to each other in the stamping direction across the blank, the first die comprising a first supporting surface and a punch portion protruding from the first supporting surface, and the second die comprising: a stamping surface that is arranged at a position offset from a position opposite to the punch portion in the stamping direction; and a wall surface that is continuous with the stamping surface, and when viewed from the second die side in the stamping direction, the punch portion has a portion opposite to the wall surface and including an opening toward the wall surface. The blank has a plate-like portion and a convex portion protruding from the plate-like portion toward the thickness direction of the plate-like portion, and when the punch head supports the plate-like portion from the first die side in the stamping direction, the plate-like portion is subjected to bending deformation by using the stamping surface that moves relatively with respect to the punch head in the stamping direction. When the first die and the second die are in the stamping direction and at the forming lower dead point of relative movement, the wall surface is opposite to the side surface of the punch head through a part of the plate-like portion, and the convex portion enters the opening without contacting the side surface.

[0022] Effects of the Invention

[0023] According to the present invention, a molded product can be manufactured efficiently. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a diagram showing a molded product.

[0025] Figure 2 This is a diagram showing an example of a formed product manufactured by the press forming apparatus according to the first embodiment.

[0026] Figure 3 It is a schematic diagram showing a press forming device according to a first embodiment.

[0027] Figure 4 This is a schematic diagram showing the positional relationship between the punch, die, and backing plate.

[0028] Figure 5 This is a diagram showing a blank used as a raw material in the manufacturing method of the first embodiment.

[0029] Figure 6 It is a figure for demonstrating the manufacturing method of 1st Embodiment.

[0030] Figure 7 It is a diagram showing another example of the press forming device.

[0031] Figure 8 It is a schematic diagram showing another example of the press forming apparatus.

[0032] Fig. 9 It is a schematic diagram showing another example of the press forming apparatus.

[0033] Fig.10 This is a schematic diagram showing another example of a method for manufacturing a molded product.

[0034] Fig.11 It is a schematic diagram showing another example of a molded product.

[0035] Fig.12 It is used to illustrate Fig.11 FIG. 1 is a diagram of a method for manufacturing a molded product.

[0036] Fig.13 It is a schematic diagram showing another example of the press forming apparatus.

[0037] Fig.14 It is a schematic diagram showing another example of the press forming apparatus.

[0038] Fig.15 It is a figure which shows another example of the manufacturing method of a molded product.

[0039] Fig.16 It is a schematic diagram showing another example of the press forming apparatus.

[0040] Fig.17 It is a schematic diagram showing another example of the press forming apparatus.

[0041] Fig.18 It is a schematic diagram showing another example of a molded product.

[0042] Fig.19 It is a schematic diagram showing another example of the press forming apparatus.

[0043] Fig. 20 It is a schematic diagram showing another example of the press forming apparatus.

[0044] Fig.21 It is a schematic diagram showing another example of the press forming apparatus.

[0045] Fig. 22 It is a schematic diagram showing another example of the press forming apparatus.

[0046] Fig.23 It is a schematic diagram showing another example of the press forming apparatus.

[0047] Fig.24 It is a schematic diagram showing another example of a molded product.

[0048] Fig.25 It is a schematic diagram showing another example of a molded product.

[0049] Fig.26 This is a diagram showing a blank used as a raw material in the manufacturing method of the second embodiment.

[0050] Fig. 27 It is a schematic diagram showing a press forming device according to a second embodiment.

[0051] Fig.28 It is a schematic diagram showing another example of the press forming apparatus.

[0052] Fig.29 It is a schematic diagram showing another example of the press forming apparatus. DETAILED DESCRIPTION

[0053] Hereinafter, a press forming apparatus and a method for producing a formed product according to an embodiment of the present invention will be described with reference to the drawings.

[0054] (First embodiment)

[0055] (Molding products)

[0056] First, a formed product produced by the press forming apparatus according to the first embodiment of the present invention will be briefly described. Figure 2 This is a diagram showing an example of a formed product manufactured by the press forming apparatus according to the first embodiment of the present invention.

[0057] like Figure 2 As shown, the molded product 3 has a closed cross-sectional shape. In this embodiment, the molded product 3 has plate-like flanges 3a, 3b, plate-like vertical walls 3c, 3d, and a top plate 3e. The flanges 3a, 3b and the top plate 3e have a flat plate shape.

[0058] In this embodiment, the flange portion 3b is overlapped on the flange portion 3a so that the molded product 3 has a closed cross-sectional shape. The vertical wall portion 3c is provided so as to be bent from the edge of the flange portion 3a and extend upward. The vertical wall portion 3d is provided on the flange portion 3a so as to be bent from the edge of the flange portion 3b and extend upward. The top plate portion 3e is provided so as to connect the upper edge of the vertical wall portion 3c and the upper edge of the vertical wall portion 3d.

[0059] In this embodiment, the vertical wall portions 3c, 3d and the top plate portion 3e are curved in an arc shape when viewed from above (when viewed from the thickness direction of the top plate portion 3e). In addition, a support portion 24 (see FIG. 2 ) described later is formed at a portion of the flange portion 3a that is opposite to the top plate portion 3e. Figure 3 ) inserted into the 4 through holes 5 (refer to Figure 5 ).

[0060] (Stamping device)

[0061] Figure 31 is a schematic diagram showing a press forming device according to a first embodiment of the present invention. Figure 3 It is shown that it is possible to manufacture Figure 2 A press forming device for forming a formed product 3 is shown.

[0062] In addition, Figure 3 In the figure, the direction in which the first die (punch) or the second die (die) moves when the blank is stamped, is indicated by arrow X (hereinafter referred to as stamping direction X), and the width direction of the stamping device is indicated by arrow Y (hereinafter referred to as width direction Y). The width direction Y is a direction orthogonal to the stamping direction X. In addition, the direction intersecting the stamping direction X and the width direction Y is indicated by arrow Z (hereinafter referred to as cross direction Z). In the present embodiment, the cross direction Z is a direction orthogonal to the stamping direction X and the width direction Y.

[0063] In addition, each component of the punching forming device can be manufactured using the same material as a known die, but detailed description is omitted. In addition, each component of the punching forming device can be driven by a drive mechanism (electric cylinder, hydraulic cylinder, air cushion device) that is the same as a known punching machine.

[0064] like Figure 3 As shown, the stamping forming device 10 of the present embodiment includes a first die 12 provided on one side in a stamping direction X and a second die 14 provided on the other side in the stamping direction X. That is, the first die 12 and the second die 14 are provided at positions opposite to each other in the stamping direction X. The first die 12 and the second die 14 move relative to each other in the stamping direction X. In the present embodiment, the first die 12 includes a punch 20, and the second die 14 includes a die 40 and a backing plate 50.

[0065] Figure 4 2 is a schematic diagram showing the positional relationship among the punch 20, the die 40 and the backing plate 50. Figure 4 This is a diagram of the press forming device 10 as viewed from above. Figure 3 and Figure 4 As shown, the punch 20 includes a first supporting surface 22 and a punch portion 23 protruding from the first supporting surface 22. In the present embodiment, the first supporting surface 22 faces the other side (the second die 14 side) in the stamping direction X. The punch portion 23 protrudes from the first supporting surface 22 to the other side in the stamping direction X. When viewed from the second die 14 side in the stamping direction X, the punch portion 23 is opposite to a wall surface 44 of the die 40 described later. In the present embodiment, the punch portion 23 has a plurality of supporting portions 24 protruding from the first supporting surface 22 to the other side in the stamping direction X. The supporting portion 24 may also be referred to as a protruding portion.

[0066] The plurality of support portions 24 are arranged at intervals from each other and arranged in a curved line when viewed from the second die 14 side in the punching direction X. In the present embodiment, each support portion 24 is formed in a cylindrical shape with a side surface 24a having a circular cross section. Figure 1 The shape of the support portion 24 shown is only an example, and the shape of the support portion 24 is not limited to the above example. Figure 6 As shown, the top of each support portion 24 preferably has a flat shape, but may also have a spherical cap shape.

[0067] In the present embodiment, the side surface 23a of the punch portion 23 is composed of a plurality of side surfaces 24a of a plurality of support portions 24. When viewed from the second die 14 side in the stamping direction X, the side surface 23a of the punch portion 23 includes an opening 23b that opens toward the wall surface 44 side of the die 40 described later. In the present embodiment, the side surface 23a of the punch portion 23 includes a plurality of openings 23b. In the present embodiment, the side surfaces 24a of two adjacent support portions 24 are arranged at intervals with the opening 23b between them. In other words, the two adjacent support portions 24 are arranged at intervals with the opening 23b between them. In addition, in the present embodiment, the opening 23b is also opened toward the second die 14 side in the stamping direction X. In addition, in the present embodiment, the opening 23b is formed to pass through between two adjacent support portions 24 in the width direction Y.

[0068] The first support surface 22 is provided at least on both sides of each support portion 24 in the cross direction Z. Figure 4 As shown in FIG. 1 , in the present embodiment, the first support surface 22 is provided at least between the plurality of support portions 24 and on both sides of the plurality of support portions 24 in the arrangement direction A of the plurality of support portions 24. In addition, in the present specification, the arrangement direction A refers to a line (in the direction X) obtained by connecting the centers of the support portions 24 when viewed from the second die 14 side (above) in the stamping direction X. Figure 4 In the example of , the direction of the curve).

[0069] like Figure 3 and Figure 4 As shown, the die 40 has a stamping surface 42 and a wall surface 44 continuous with the stamping surface 42. In the present embodiment, the stamping surface 42 faces one side (the first die 12 side) in the stamping direction X. The wall surface 44 extends from the edge of the stamping surface 42 to the other side (the opposite side of the first die 12) in the stamping direction X. The stamping surface 42 is provided on one side of the punch head 23 (a plurality of support portions 24) in the width direction Y. In the present embodiment, the stamping surface 42 is arranged at a position offset from a position opposite to the punch head 23 in the stamping direction X. The wall surface 44 is located between the punch head 23 (a plurality of support portions 24) and the stamping surface 42 in the width direction Y.

[0070] The punching surface 42 and the wall surface 44 are arranged in a manner extending from a position closer to one side than the support portion 24 to a position closer to the other side than the support portion 24 in the cross direction Z. Figure 4 As shown, the stamping surface 42 and the wall surface 44 are arranged along the arrangement direction A and in a manner extending from a position closer to one side than the plurality of support portions 24 to a position closer to the other side than the plurality of support portions 24 in the arrangement direction A. In addition, in the present embodiment, when viewed from the side of the first die 12 in the stamping direction X, the wall surface 44 is curved in an arc shape in a manner convex toward one side in the width direction Y.

[0071] Reference Figure 3 The die 40 is provided so as to be able to advance and retreat relative to the first support surface 22 of the punch 20 in the punching direction X. That is, the punching surface 42 and the wall surface 44 are able to advance and retreat relative to the first support surface 22 in the punching direction X.

[0072] like Figure 3 and Figure 4 As shown, the pad 50 is arranged at a position opposite to the punch head 23 (plural support parts 24) in the punching direction X. In the present embodiment, the pad 50 has a second support surface 52 opposite to the punch head 23 (plural support parts 24) in the punching direction X. The second support surface 52 is arranged in a manner extending from a position closer to one side than the support part 24 to a position closer to the other side than the support part 24 in the cross direction Z. In the present embodiment, as shown in FIG. Figure 4 As shown, the second support surface 52 is provided so as to extend in the arrangement direction A from a position closer to one side than the plurality of support portions 24 to a position closer to the other side than the plurality of support portions 24 .

[0073] Reference Figure 3 The backing plate 50 is provided to be able to move forward and backward relative to the punch head 23 (plural support parts 24 ) of the punch 20 in the punching direction X. That is, the second support surface 52 is able to move forward and backward relative to the plurality of support parts 24 in the punching direction X.

[0074] (Method for manufacturing molded product)

[0075] Next, a method for manufacturing a molded product will be described. In the manufacturing method of the present embodiment, a pre-processed blank is press-formed using the above-described press forming device 10 to manufacture a molded product 3. This will be described in detail below.

[0076] Figure 5 2 is a diagram showing a blank used as a raw material in the manufacturing method of this embodiment. Figure 5 As shown, the blank 4 includes a first plate-shaped portion 4a, a second plate-shaped portion 4b, and a third plate-shaped portion 4c.

[0077] The first plate-like portion 4a has a flat plate shape. A plurality of through holes 5 are formed in the first plate-like portion 4a. In this embodiment, the plurality of through holes 5 are formed in a manner similar to the first mold 12 (see Figure 3 ) of the plurality of support portions 24 (see Figure 3 ) is arranged in a manner corresponding to the through hole 5. In addition, the shape of the through hole 5 is not limited to a circular shape, as long as it is formed in a size and shape that can be inserted into the support portion 24. Therefore, the through hole 5 can also have other shapes such as an elliptical shape or a polygonal shape. The relationship between the through hole 5 and the support portion 24 will be described later.

[0078] The second plate-like portion 4b has a flat plate shape, and the second plate-like portion 4b is disposed in a manner opposite to the first plate-like portion 4a in the thickness direction of the first plate-like portion 4a. In addition, the second plate-like portion 4b is disposed in a manner spaced apart from the first plate-like portion 4a in the thickness direction of the first plate-like portion 4a. The third plate-like portion 4c is disposed in a manner extending in the thickness direction of the first plate-like portion 4a in a manner connecting the edge of the first plate-like portion 4a and the edge of the second plate-like portion 4b. In the present embodiment, the third plate-like portion 4c is disposed in a manner opposite to the molded product 3 (see Figure 2 ) of the longitudinal wall portion 3c (see Figure 2 ) corresponding to the first plate-like portion 4a is curved in an arc shape when viewed from the thickness direction of the first plate-like portion 4a.

[0079] In addition, the material and size of the blank 4 are not particularly limited, and for example, a plate (e.g., a steel plate) having a tensile strength of 270 MPa or more and a thickness of 0.5 mm to 5 mm can be used to manufacture the blank 4. The manufacturing method of the blank 4 is not particularly limited, and for example, the blank 4 can be manufactured by stamping a plate having a plurality of through holes 5 formed therein using a known stamping device.

[0080] Figure 6 is a diagram for explaining the manufacturing method of this embodiment. Figure 6 In FIG. 1 , the components of the press forming device 10 and the blank 4 are shown in a simplified manner. Figure 6 , the press forming device 10 and the blank 4 viewed from the cross direction Z are shown.

[0081] When the blank 4 is stamped, Figure 6As shown in (a), first, the blank 4 is placed on the first supporting surface 22 of the first die 12 in such a manner that the punch head 23 (plural supporting portions 24) crosses the first plate-shaped portion 4a from the first die 12 side in the punching direction X and supports the second plate-shaped portion 4b. More specifically, the first supporting surface 22 is used to support the first plate-shaped portion 4a in such a manner that the third plate-shaped portion 4c is located on the other side of the punch head 23 (plural supporting portions 24) in the width direction Y and the plurality of supporting portions 24 of the punch head 23 pass through the plurality of through holes 5 and protrude toward the second plate-shaped portion 4b relative to the first plate-shaped portion 4a.

[0082] Next, if Figure 6 As shown in (b), the backing plate 50 (second supporting surface 52) is moved to one side (first die 12 side) in the punching direction X, and the second plate-shaped portion 4b is clamped by the punch head 23 (plural supporting portions 24) and the second supporting surface 52. In addition, in this embodiment, Figure 6 The state shown in (b) corresponds to "a state in which the first plate-like portion is supported by the first supporting surface from the first die side and the second plate-like portion is supported by the punch portion that crosses the first plate-like portion in the punching direction from the first die side".

[0083] Next, if Figure 6 (b) Figure 6 (c) Figure 6 As shown in (d), the die 40 (stamping surface 42) is relatively moved relative to the top of the punch portion 23 (multiple support portions 24) from the other side in the stamping direction X (the second die 14 side) to one side (the first die 12 side). As a result, a portion of the second plate-shaped portion 4b that is closer to the side of the punch portion 23 (multiple support portions 24) in the width direction Y is pressed toward one side (the first die 12 side) in the stamping direction X. As a result, the second plate-shaped portion 4b is subjected to bending deformation, and the formed product 3 is completed. In the present embodiment, when the forming lower dead point ( Figure 6 In the state shown in (d) of FIG. 1 ), the wall surface 44 of the die 40 is opposite to the side surface 23a of the punch head 23 via a part of the second plate-shaped portion 4b. In addition, when the die 40 is at the lower dead point of the forming, the wall surface 44 of the die 40 is opposite to at least one opening 23b in the width direction Y. In the present embodiment, when the die 40 is at the lower dead point of the forming, the wall surface 44 is opposite to a plurality of openings 23b in the width direction Y.

[0084] Finally, the second die 14 (the punch 40 and the backing plate 50 ) is moved to the other side in the punching direction X, and the formed product 3 is removed from the press forming device 10 .

[0085] (Effects of this embodiment)

[0086] As described above, according to the stamping forming device 10 of the present embodiment, when manufacturing a molded product 3 having a plate-like portion (flange portion 3a) opposite to the top plate portion 3e from the blank 4, the punch portion 23 (support portion 24) can be used to support the portion of the second plate-like portion 4b of the blank 4 that will later become the top plate portion 3e from the side of the first plate-like portion 4a. Thus, the longitudinal wall portion 3d and the flange portion 3b can be formed by a simple bending process using the punching surface 42 and the wall surface 44 of the second die 14. In this case, a core is not required when manufacturing the molded product 3, and the number of processes can be prevented from increasing. As a result, the molded product 3 can be manufactured efficiently.

[0087] Furthermore, when the molded product 3 manufactured as described above is used as a structural member for an automobile, the through hole 5 may be used as a hole for drainage, or the through hole 5 may be blocked by a patch or the like. In addition, in order to sufficiently ensure the rigidity of the peripheral portion of the through hole 5, the portion where the through hole 5 is formed may be flanging processed, a patch or the like for reinforcement may be attached to the peripheral portion of the through hole 5, or the peripheral portion of the through hole 5 may be thickened.

[0088] (Variation Example)

[0089] The shape of the molded product 3 is not limited to the above example. For example, when viewed from the thickness direction of the top plate portion 3e, the vertical wall portions 3c, 3d and the top plate portion 3e may be arranged in a direction opposite to the vertical wall portions 3c, 3d and the top plate portion 3e. Figure 2 The longitudinal wall portions 3c, 3d and the top plate portion 3e are curved in a convex manner in opposite directions. In this case, the shapes of the various parts of the stamping forming device 10 can be appropriately changed according to the shape of the formed product 3. Specifically, for example, Figure 7 As shown, when viewed from the second die 14 side in the punching direction X, the plurality of support portions 24 are arranged to draw a curve convex toward the other side in the width direction Y, and the wall surface 44 is provided to convex toward the other side in the width direction Y.

[0090] In addition, the vertical wall portions 3c, 3d and the top plate portion 3e may be formed to extend in a straight line when viewed from the thickness direction of the top plate portion 3e. In this case, for example, when viewed from the second die 14 side in the punching direction X, the plurality of support portions 24 are arranged to be arranged in a straight line along the cross direction Z, and the wall surface 44 is arranged to extend in parallel along the cross direction Z, but the illustration is omitted.

[0091] Alternatively, when viewed from the thickness direction of the top plate 3e, one of the vertical walls 3c and 3d may be curved in an arc shape, while the other may be formed in a straight line. In this case, a plurality of support portions 24 may be arranged in accordance with the shapes of the vertical walls 3c and 3d.

[0092] In addition, the distance between adjacent support portions 24, the arrangement of the plurality of support portions 24, the number of support portions 24, and the shape and size of the support portions 24 are not limited to the above examples, and may be appropriately changed according to the shape and size of the molded product to be manufactured. Figure 8 As shown, a plurality of support portions 24 may also be arranged in an array along the width direction Y. Fig. 9 As shown, the punch portion 23 of the first die 12 may also be composed of a support portion 24. In this case, as long as the blank 4 (refer to Figure 5 ) the first plate-shaped portion 4a may be formed with a through hole through which a supporting portion 24 passes.

[0093] In addition, in the above-mentioned embodiment, the manufacturing method having the flange portion 3b (see Figure 2 ) of the molded product 3, but if Fig.10 As shown in FIG. 1 , a molded product 3 without a flange portion 3 b can also be manufactured. The same is true in the embodiments described below. Fig.10 (a) shows the press forming device 10 in a state where the second plate-shaped portion 4b of the blank 4 is clamped by the punch head 23 (support portion 24) and the second support surface 52. Fig.10 (b) shows the stamping forming device 10 in a state where the portion of the second plate-shaped portion 4b that is closer to the punch head 23 (support portion 24) in the width direction Y is pressed toward one side (the first die 12 side) in the stamping direction X by the stamping surface 42. Fig.10 (c) shows the state of the press forming device 10 when the formed product 3 is taken out (during demolding).

[0094] In addition, in the above embodiment, the flange portion 3a partially overlaps the flange portion 3b to make the molded product 3 have a closed cross-sectional shape, but the molded product 3 may not have a closed cross-sectional shape. Fig.11 As shown in the molded product 3, a gap may be formed between the flange portion 3a and the flange portion 3b (vertical wall portion 3d) in a direction parallel to the width direction of the top plate portion 3e. Fig.11 The molded product 3 shown can be produced, for example, as follows.

[0095] Fig.12 It is used to illustrate Fig.11 FIG. 3 is a diagram of a method for manufacturing a molded product. Fig.11 In the case of molded product 3, also with manufacturing Figure 2 The same is true for the molded product 3. Fig.12 As shown in (a), the blank 4 is placed on the first supporting surface 22 of the first die 12. However, in the manufacturing Fig.11 The blank 4 used when forming the product 3 (refer to Fig.12) of the first plate-shaped portion 4a (see Fig.12 ) in the width direction Y is greater than the length in the manufacturing Figure 2 The blank 4 used when forming the product 3 (refer to Figure 6 ) of the first plate-shaped portion 4a (see Figure 6 ) is short in the width direction Y. In addition, it can also be that in manufacturing Fig.11 The blank 4 used when forming the product 3 (refer to Fig.12 ) is not formed with the through hole 5 (see Figure 5 ).

[0096] In this embodiment, the first plate-like portion 4a is supported by the first supporting surface 22 in such a manner that the third plate-like portion 4c is located on the other side of the punch head 23 (multiple supporting portions 24) in the width direction Y and the multiple supporting portions 24 protrude toward the second plate-like portion 4b on one side of the first plate-like portion 4a in the width direction Y relative to the first plate-like portion 4a.

[0097] Next, if Fig.12 As shown in (b), the backing plate 50 (second supporting surface 52) is moved to one side (first die 12 side) in the punching direction X, and the second plate-shaped portion 4b is clamped by the punch head 23 (plural supporting portions 24) and the second supporting surface 52. In addition, in this embodiment, Fig.12 The state shown in (b) corresponds to "a state in which the first plate-like portion is supported by the first supporting surface from the first die side and the second plate-like portion is supported by the punch portion that crosses the first plate-like portion in the punching direction from the first die side".

[0098] Next, if Fig.12 (b) Fig.12 (c) Fig.12 As shown in (d), the die 40 (punching surface 42) is relatively moved relative to the top of the punch head 23 (plurality of support portions 24) from the other side (second die 14 side) to one side (first die 12 side) in the punching direction X. As a result, the portion of the second plate-shaped portion 4b that is closer to one side than the plurality of support portions 24 in the width direction Y is pressed toward one side (first die 12 side) in the punching direction X, completing Fig.11 The molded product 3 is shown.

[0099] In the above embodiment, the case where the first support surface 22 of the first mold 12 has a flat shape has been described, but the shape of the first mold 12 is not limited to the above example. Fig.13 1 is a schematic diagram showing another example of the press forming device 10. Fig.13 (a) shows the blank 4 before forming and the stamping forming device 10. Fig.13 (b) shows the blank 4 (molded product 3 ) after molding and the press molding device 10 .

[0100] Fig.13 The stamping forming device 10 shown in FIG. Figure 3 The press forming apparatus 10 shown is different in the shape of the first die 12 (punch 20 ). Fig.13 The first mold 12 shown and Figure 3 The first mold 12 shown is different in the shape of the first support surface 22. Specifically, Fig.13 The first supporting surface 22 of the first die 12 shown includes a flat surface 22a, a vertical surface 22b extending from an edge of the flat surface 22a on one side in the width direction Y toward the second die 14, and a flat surface 22c extending from an edge of the vertical surface 22b on the second die 14 side in the punching direction X toward one side in the width direction Y. The punch head 23 (supporting portion 24) is provided to protrude from the flat surface 22a toward the second die 14.

[0101] In this case, if Fig.13 As shown, it is sufficient to use a blank 4 having a first plate-shaped portion 4a bent in a manner corresponding to the first support surface 22. In this way, by appropriately changing the shape of the first support surface 22 and the shape of the blank 4, a molded product 3 having various cross-sectional shapes can be manufactured. Fig.13 In the example shown, by forming using the press forming device 10, a formed product 3 having a flange portion 30a, a vertical wall portion 30b, a bottom plate portion 30c, a vertical wall portion 30d, a top plate portion 30e, a vertical wall portion 30f and a flange portion 30g can be manufactured.

[0102] In addition, hereinafter, the cylindrical portion formed in the molded product 3 by the press forming device is referred to as a formed portion. Fig.13 In the molded product 3 shown, the molded portion 30 is formed so as to protrude from the flange portions 30a and 30g which overlap each other toward both sides in the thickness direction of the flange portion 30a (30g).

[0103] In addition, it is also possible to manufacture molded products 3 with various cross-sectional shapes by appropriately changing the shapes of other components of the press forming device 10, but detailed descriptions thereof are omitted. Fig.14 In the stamping forming device 10 shown in (a), the support portion 24 of the punch portion 23 has an upper surface 240 inclined relative to the stamping direction X, and the second support surface 52 of the pad 50 has an inclined surface 520 substantially parallel to the upper surface 240 of the support portion 24. Fig.14In the stamping forming device 10 shown in (b), the first supporting surface 22 further has a supporting surface 22d inclined relative to the stamping direction X. The supporting portion 24 of the punch head 23 is provided to protrude from the supporting surface 22d toward the second die 14 side. In these cases, by using a blank 4 corresponding to the shapes of the first supporting surface 22, the supporting portion 24, and the second supporting surface 52, it is also possible to manufacture a formed product 3 corresponding to the shapes of the first supporting surface 22 and the supporting portion 24.

[0104] In the above embodiment, the case where the molded product 3 is manufactured from the blank 4 having the first plate-shaped portion 4a, the second plate-shaped portion 4b and the third plate-shaped portion 4c is described, but the shape of the blank 4 is not limited to the above example. Fig.15 As shown in (a), the blank 4 may include not only the first plate-shaped portion 4a, the second plate-shaped portion 4b and the third plate-shaped portion 4c, but also the fourth plate-shaped portion 4d and the fifth plate-shaped portion 4e. In addition, the fourth plate-shaped portion 4d and the fifth plate-shaped portion 4e are provided on the side opposite to the second plate-shaped portion 4b and the third plate-shaped portion 4c in the thickness direction of the first plate-shaped portion 4a. In the present embodiment, a through hole 5 is formed in the portion of the first plate-shaped portion 4a opposite to the second plate-shaped portion 4b and the portion opposite to the fourth plate-shaped portion 4d.

[0105] In this embodiment, if Fig.15 As shown in (b), first, by using Figure 6 The second plate-like portion 4b is press-formed by the press forming device 10 in the same manner as described above to form the flange portion 3b, the vertical wall portion 3d and the top plate portion 3e. Fig.15 In the molded product 3 shown, the molded portion 32 is composed of a flange portion 3b, vertical wall portions 3c and 3d, and a top plate portion 3e.

[0106] Next, if Fig.15 (c) Fig.15 As shown in (d), the blank 4 is moved in the cross direction Z (refer to Figure 3 ) is rotated 180 degrees when observed, and the fourth plate-shaped portion 4d is stamped by the stamping forming device 10. Thus, a formed portion 34 consisting of the flange portion 3f, the vertical wall portions 3g, 3h and the top plate portion 3i is formed. In this way, according to this embodiment, a formed product 3 having a pair of formed portions 32 and 34 protruding to opposite sides in the thickness direction of the first plate-shaped portion 4a can be manufactured. In addition, the formed portion 32 may not have the flange portion 3b, and the formed portion 34 may not have the flange portion 3f.

[0107] Fig.16 It is a diagram showing another modified example of the press forming device. Fig.16 The stamping forming device 10 shown in FIG. Figure 6 The illustrated press forming apparatus 10 differs in the following respects.

[0108] like Fig.16 As shown, in this embodiment, the die 40 has wall surfaces 44 on both sides in the width direction Y. In addition, pads 50 are provided on one side and the other side of the die 40 in the width direction Y. Punch parts 23 (one or more support parts 24) are provided at portions of the first die 12 (punches 20) that face the second support surfaces 52 of each die 40 in the punching direction X.

[0109] The blank 4 used in this embodiment has a pair of second plate-shaped portions 4b and a pair of third plate-shaped portions 4c. One or more through holes 5 for inserting one or more supporting portions 24 are respectively provided in the portions of the first plate-shaped portion 4a facing the pair of second plate-shaped portions 4b.

[0110] In this embodiment, as in the above-mentioned embodiment, when the blank 4 is stamped, Fig.16 As shown in (a), the punch portion 23 (support portion 24) passes through the through hole 5 and protrudes toward the second plate-shaped portion 4b relative to the first plate-shaped portion 4a, and the first support surface 22 supports the first plate-shaped portion 4a. Fig.16 As shown in (b), each pad 50 (second supporting surface 52) is moved to one side (first die 12 side) in the stamping direction X, and a pair of second plate-shaped portions 4b are clamped by the punch head 23 (supporting portion 24) and the second supporting surface 52 of each pad 50.

[0111] Next, the die 40 (punching surface 42) is relatively moved from the other side (second die 14 side) to one side (first die 12 side) relative to the top of the punch portion 23 (support portion 24) in the punching direction X. As a result, the portion of each second plate-shaped portion 4b that is closer to the die 40 side than the punch portion 23 (support portion 24) in the width direction Y is pressed toward one side (first die 12 side) in the punching direction X. As a result, the molded product 3 having a pair of molded portions 32 is completed.

[0112] In addition, if Fig.17 As shown in FIG. 1 , a pair of punching dies 40 may be provided between a pair of pads 50 in the width direction Y, but detailed description thereof is omitted. Fig.16 The manufacturing method described above can also manufacture a molded product 3 having a pair of molded portions 32 by operating the die 40 and the backing plate 50 in the same manner. Fig.17 In the press forming device 10 shown, the pair of formed portions 32 may be formed simultaneously by operating the pair of dies 40 simultaneously, or the pair of formed portions 32 may be formed sequentially by operating the pair of dies 40 sequentially.

[0113] In addition, Fig.16 and Fig.17 In the stamping forming device 10 shown in FIG. Fig.13 The stamping forming device 10 can also change the shape of the first supporting surface 22 as shown in FIG. Fig.18 Although the molded product 3 having a pair of molded portions 30 is manufactured as shown, detailed description thereof is omitted.

[0114] In the above embodiment, the case where the first die 12 is constituted by the punch 20 has been described, but the structure of the first die 12 is not limited to the above example. Fig.19 It is a diagram showing another modified example of the press forming device 10 . Fig.19 The stamping forming device 10 shown in FIG. Figure 6 The press forming apparatus 10 shown is different in that the first die 12 has a punch 20 and a die 26 .

[0115] In this embodiment, the punch 20 also has a first support surface 22 and a punch head 23 (one or more support parts 24) similarly to the above-mentioned punch 20. However, in this embodiment, Fig.19 As shown, in the portion facing the punching surface 42 of the die 40 in the punching direction X, the first support surface 22 (punch 20 ) is not provided, but the die 26 is provided.

[0116] like Fig.19 As shown, the die 26 has a punching surface 26a facing the other side (the second die 14 side) in the punching direction X and a wall surface 26b extending from the edge of the punching surface 26a to one side (the opposite side of the second die 14) in the punching direction X. The punching surface 26a is provided on one side of the punch portion 23 (one or more supporting portions 24) in the width direction Y in a manner opposite to the punching surface 42 in the punching direction X. The wall surface 26b is located between the punch portion 23 (one or more supporting portions 24) and the punching surface 26a in the width direction Y.

[0117] As with the punching surface 42 and the wall surface 44, the punching surface 26a and the wall surface 26b are aligned in the intersecting direction Z (see Figure 3 ) is arranged in a manner extending from a position closer to one side of the support portion 24 to a position closer to the other side of the support portion 24 relative to each support portion 24. The die 26 is arranged to be able to move forward and backward relative to the first support surface 22 of the punch 20 in the punching direction X.

[0118] In this embodiment, when the blank 4 is stamped, Fig.19As shown in (a), the blank 4 is first placed on the first supporting surface 22 and the punching surface 26a. More specifically, the first plate-like portion 4a is supported by the first supporting surface 22 and the punching surface 26a in such a manner that the punch head 23 (one or more supporting portions 24) passes through one or more through holes 5 and protrudes toward the second plate-like portion 4b relative to the first plate-like portion 4a.

[0119] Next, if Fig.19 As shown in (b), the backing plate 50 is moved, and the second plate-shaped portion 4b is clamped by the punch portion 23 (one or more supporting portions 24) and the second supporting surface 52. Next, the die 26 and the die 40 are moved in a manner approaching each other in the punching direction X. As a result, the portions of the first plate-shaped portion 4a and the second plate-shaped portion 4b that are closer to one side than the punch portion 23 (one or more supporting portions 24) in the width direction Y are pressed in a manner approaching each other in the punching direction X. As a result, a formed product 3 having a formed portion 30 is completed.

[0120] In the above embodiment, the case where the punch portion 23 (support portion 24 ) is provided in the first die 12 is described. However, a punch portion (support portion) having the same structure as the punch portion 23 may be provided in the second die 14 . Fig. 20 1 is a diagram showing another example of the press forming device 10. Fig. 20 This is a schematic diagram of the punch 20 , the backing plate 50 , and the blank 4 of the press forming device 10 as viewed from the other side in the width direction Y. FIG.

[0121] Fig. 20 The stamping forming device 10 shown in FIG. Figure 6 The punch forming device 10 shown is different in that the backing plate 50 has a punch portion 53 protruding from the second support surface 52. The punch portion 53 protrudes from the second support surface 52 to one side (the first die 12 side) in the punching direction X. In the present embodiment, the punch portion 53 has a plurality of support portions 54 protruding from the second support surface 52 to one side in the punching direction X. In the present embodiment, the plurality of support portions 24 and the plurality of support portions 54 are arranged in an alternating manner along the cross direction Z.

[0122] In use Fig. 20 When the punching forming device 10 shown in the figure performs punching forming on the blank 4, the second plate-shaped portion 4b can be punched while the second plate-shaped portion 4b is clamped by the punch portion 23 (multiple supporting portions 24) and the second supporting surface 52, and the first plate-shaped portion 4a is clamped by the punch portion 53 (multiple supporting portions 54) and the first supporting surface 22. Thus, the blank 4 can be fully prevented from moving during the punching forming, and a higher precision punching forming can be achieved.

[0123] In addition, in the above-mentioned embodiment, the first supporting surface 22 and the punch head 23 (supporting portion 24) are integrally provided on the punch 20, but the first supporting surface 22 and the punch head 23 (supporting portion 24) may be provided as independent components. The same is also true in the second embodiment described later. In addition, in the above-mentioned embodiment, the second supporting surface 52 and the punch head 53 (supporting portion 54) are integrally provided on the backing plate 50, but the second supporting surface 52 and the punch head 53 (supporting portion 54) may be provided as different components. Fig.21 1 is a diagram showing another example of the press forming device 10. Fig.21 This is a schematic diagram of the punch 20 , the backing plate 50 , and the blank 4 of the press forming device 10 as viewed from the other side in the width direction Y. FIG.

[0124] Fig.21 The stamping forming device 10 shown in FIG. Fig. 20 The illustrated press forming device 10 is different in that the punch 20 has a base 20a and a punch portion 23 (a plurality of support portions 24) provided as separate components, and the backing plate 50 has a base 50a and a punch portion 53 (a plurality of support portions 54) provided as separate components.

[0125] In the stamping forming device 10 of the present embodiment, the first supporting surface 22 is provided on the base 20a. The punch portion 23 (plural supporting portions 24) is provided so as to be movable relative to the first supporting surface 22 along the stamping direction X. In addition, the second supporting surface 52 is provided on the base 50a. The punch portion 53 (plural supporting portions 54) is provided so as to be movable relative to the second supporting surface 52 along the stamping direction X. In the present embodiment, each supporting portion 24 and each supporting portion 54 is supported by, for example, a known supporting member 28 (air cushion, etc.) so as to be movable relative to the base 20a, 50a along the stamping direction X.

[0126] In the press forming device 10 of this embodiment, Fig. 20 The stamping forming device 10 shown in the figure can also perform stamping forming on the second plate-shaped portion 4b while clamping the second plate-shaped portion 4b with the punch portion 23 (multiple supporting portions 24) and the second supporting surface 52 and clamping the first plate-shaped portion 4a with the punch portion 53 (multiple supporting portions 54) and the first supporting surface 22. Thus, the blank 4 can be fully prevented from moving during stamping forming, and stamping forming with higher precision can be achieved.

[0127] In addition, in the above embodiment, the first support surface 22 is flat in the cross section of the punch 20 perpendicular to the width direction Y, but the shape of the first support surface 22 is not limited to the above example. The same is true for the second support surface 52. Specifically, Fig. 22 (a)~ Fig. 22As shown in (c), the shapes of the first support surface 22 and the second support surface 52 may be appropriately changed in accordance with the shape of the blank 4 (molded product 3). In addition, the height (position of the top end) of each support portion 24 may be appropriately changed in accordance with the shape of the blank 4 (molded product 3). Therefore, in the stamping direction X, the position of the top of at least one support portion 24 among the plurality of support portions 24 may be different from the position of the top of the other support portions 24.

[0128] In the above embodiment, the second die 14 has the die 40 and the backing plate 50, but the structure of the second die 14 is not limited to the above example. Figure 6 The punching die 40 and the backing plate 50 of the punching forming device 10 are shown, and Fig.23 The die 40a is provided as shown. The die 40a has a pressing surface 42a, a wall surface 44a and a second supporting surface 52a, which have the same structure as the pressing surface 42, the wall surface 44 and the second supporting surface 52 in the above-mentioned embodiment.

[0129] Reference Fig.23 (a) Fig.23 (b), in this embodiment, when the blank 4 is stamped, the die 40a is relatively moved toward the punch 20 side in the stamping direction X. As a result, the stamping surface 42a, the wall surface 44a and the second support surface 52a sequentially contact the second plate-shaped portion 4b, and the second plate-shaped portion 4b is stamped. Thus, the formed product 3 having the formed portion 32 is completed.

[0130] In addition, the second mold may not have a second support surface, but detailed description of this is omitted. Figure 6 The second die 14 shown may not be provided with the backing plate 50. In this case, the blank 4 can also be press-formed by the punch 20 and the die 40.

[0131] In the above-mentioned press forming device 10, by appropriately adjusting the shape and size of each part, it is possible to obtain Fig.24 The molded products are of various shapes as shown, but detailed description is omitted.

[0132] (Second embodiment)

[0133] (Molding products)

[0134] Fig.25 This is a diagram showing an example of a formed product manufactured by a press forming apparatus according to a second embodiment of the present invention.

[0135] like Fig.25As shown, the molded product 6 has a plate-like flange portion 6a, a plate-like vertical wall portion 6b, and a plate-like flange portion 6c. The vertical wall portion 6b is provided to connect the edge of the flange portion 6a and the edge of the flange portion 6c. The flange portion 6a and the flange portion 6c are provided to extend from the vertical wall portion 6b in opposite directions to each other in the thickness direction of the vertical wall portion 6b.

[0136] The vertical wall portion 6b is formed with a plurality of protrusions 7. The protrusions 7 are formed to protrude from the vertical wall portion 6b toward the flange portion 6a in the thickness direction of the vertical wall portion 6b. The protrusions 7 are recessed when viewed from the outside, and therefore may also be referred to as recessed portions.

[0137] (Blank)

[0138] In the present embodiment, a formed product 6 is manufactured using a blank on which a plurality of protrusions 7 are formed in advance as a raw material. Fig.26 FIG. 2 is a diagram showing an example of a blank used as a raw material in the present embodiment. Fig.26 As shown, the blank 8 has a plate-like portion 8a and a plurality of convex portions 7 protruding from the plate-like portion 8a toward the thickness direction of the plate-like portion 8a. In addition, in the present embodiment, a bottomed convex portion 7 is formed, but it may also be a convex portion 7 having a hole penetrating in the thickness direction of the vertical wall portion 6b, for example, by flanging processing.

[0139] (Stamping device and manufacturing method)

[0140] Fig. 27 is a schematic diagram showing a press forming device according to a second embodiment of the present invention. Fig. 27 (a) is a diagram of the stamping device viewed from the cross direction Z. Fig. 27 (b) is a diagram when the stamping device is observed from above. In addition, in this embodiment, similarly to the above-mentioned embodiment, the direction in which the first die or the second die moves when the blank is stamped is recorded as the stamping direction X. The width direction Y of the stamping device is a direction orthogonal to the stamping direction X. In addition, the direction intersecting the stamping direction X and the width direction Y is recorded as the intersecting direction Z.

[0141] like Fig. 27 As shown, the stamping forming device 100 of the present embodiment includes a first die 110 provided on one side in a stamping direction X and a second die 120 provided on the other side in the stamping direction X. That is, the first die 110 and the second die 120 are provided at positions opposite to each other in the stamping direction X. The first die 110 and the second die 120 move relatively in the stamping direction X. In the present embodiment, the first die 110 includes a punch 60, and the second die 120 includes a die 70 and a backing plate 80.

[0142] The punch 60 includes a first supporting surface 62 and a punch portion 63 protruding from the first supporting surface 62. In the present embodiment, the first supporting surface 62 faces the other side (the second die 120 side) in the stamping direction X. The punch portion 63 protrudes from the first supporting surface 62 to the other side in the stamping direction X. When viewed from the second die 120 side in the stamping direction X, the punch portion 63 is opposite to a wall surface 74 of the die 70 described later. In the present embodiment, the punch portion 63 has a plurality of supporting portions 64 protruding from the first supporting surface 62 to the other side in the stamping direction X. The plurality of supporting portions 64 are spaced apart from each other and arranged along the cross direction Z. In the present embodiment, each supporting portion 64 is formed in a columnar shape with a side surface 64a having a rectangular cross-section. In addition, Fig. 27 The shape of the support portion 64 shown is only an example, and the shape of the support portion 64 is not limited to the above example. The top of each support portion 64 preferably has a flat shape, but may also have a spherical cap shape.

[0143] In the present embodiment, the side surface 63a of the punch portion 63 is composed of a plurality of side surfaces 64a of a plurality of support portions 64. When viewed from the second die 120 side in the stamping direction X, the side surface 63a of the punch portion 63 includes an opening portion 63b that opens toward the wall surface 74 side of the die 70 described later. In the present embodiment, the side surface 63a of the punch portion 63 includes a plurality of opening portions 63b. In the present embodiment, the side surfaces 64a of two adjacent support portions 64 are arranged at intervals across the opening portion 63b. In other words, two adjacent support portions 64 are arranged at intervals across the opening portion 63b. In addition, in the present embodiment, the opening portion 63b is also opened toward the second die 120 side in the stamping direction X. In addition, in the present embodiment, the opening portion 63b is formed to pass through between two adjacent support portions 64 in the width direction Y.

[0144] Similar to the first supporting surface 22 of the first embodiment, the first supporting surface 62 is provided at least on both sides of each supporting portion 64 in the cross direction Z. In the present embodiment, similar to the first supporting surface 22 of the first embodiment, the first supporting surface 62 is provided at least between the plurality of supporting portions 64 and on both sides of the plurality of supporting portions 64 in the arrangement direction of the plurality of supporting portions 64.

[0145] Similar to the above-mentioned die 40, the die 70 has a stamping surface 72 and a wall surface 74 continuous with the stamping surface 72. In the present embodiment, the stamping surface 72 faces one side in the stamping direction X (the first die 110 side). The wall surface 74 extends from the edge of the stamping surface 72 to the other side in the stamping direction X. The stamping surface 72 is provided on one side of the punch head 63 (a plurality of support portions 64) in the width direction Y. In the present embodiment, the stamping surface 72 is arranged at a position offset from a position opposite to the punch head 63 in the stamping direction X. The wall surface 74 is located between the punch head 63 (a plurality of support portions 64) and the stamping surface 72 in the width direction Y.

[0146] Similar to the punching surface 42 and the wall surface 44, the punching surface 72 and the wall surface 74 are provided in a manner extending from a position on one side of the support portion 64 to a position on the other side of the support portion 64 relative to each support portion 64 in the cross direction Z. In the present embodiment, the punching surface 72 and the wall surface 74 are provided in a manner along the arrangement direction of the plurality of support portions 64 and in a manner extending from a position on one side of the plurality of support portions 64 to a position on the other side of the plurality of support portions 64 in the arrangement direction. The die 70 is provided so as to be able to move forward and backward relative to the first support surface 62 of the punch 60 in the punching direction X.

[0147] Similar to the above-mentioned pad 50, the pad 80 is arranged at a position opposite to the punch head 63 (multiple support parts 64) in the punching direction X. In the present embodiment, the pad 80 has a second support surface 82 opposite to the punch head 63 (multiple support parts 64) in the punching direction X. Similar to the above-mentioned second support surface 52, the second support surface 82 is arranged in a manner extending from a position closer to one side than the support part 64 to a position closer to the other side than the support part 64 relative to each support part 64 in the cross direction Z. In the present embodiment, the second support surface 82 is arranged in a manner extending from a position closer to one side than the multiple support parts 64 to a position closer to the other side than the multiple support parts 64 in the arrangement direction of the multiple support parts 64. The pad 80 is arranged to be able to move forward and backward relative to the multiple support parts 64 of the punch 60 in the punching direction X.

[0148] When the blank 8 is subjected to stamping, the punch head 63 (plural support portions 64) is first used to support the blank 8. More specifically, the blank 8 is supported by the plurality of support portions 64 in such a manner that each convex portion 7 is located on one side of the plurality of support portions 64 in the width direction Y and between two adjacent support portions 64 in the cross direction Z and protrudes toward one side in the stamping direction X.

[0149] Next, similarly to the first embodiment described above, the backing plate 80 (second supporting surface 82) is moved to one side in the punching direction X, and the plate-like portion 8a is clamped by the punch head 63 (multiple supporting portions 64) and the second supporting surface 82. Thereafter, similarly to the first embodiment described above, the die 70 (punching surface 72) is relatively moved from the other side to one side in the punching direction X relative to the top of the punch head 63 (multiple supporting portions 64). As a result, the portion of the plate-like portion 8a that is closer to one side than the multiple supporting portions 64 in the width direction Y is pressed to one side in the punching direction X. As a result, the plate-like portion 8a is subjected to bending deformation, and the formed product 6 is completed. In the present embodiment, when the first die 110 and the second die 120 are at the lower dead point of the relative movement in the stamping direction X, the wall surface 74 of the die 70 is opposite to the side surface 63a of the punch head 63 via a part of the plate-shaped portion 8a, and each convex portion 7 enters the opening portion 63b without contacting the side surface 63a. In addition, the state of the stamping forming device 100 when it is at the lower dead point of the relative movement between the first die 110 and the second die 120 is equivalent to Figure 6 The state after the punch 20 in (d) is replaced by the punch 60, the die 40 is replaced by the die 70, and the pad 50 is replaced by the pad 80.

[0150] (Effects of this embodiment)

[0151] As described above, according to the press forming device 100 of the present embodiment, when the formed product 6 having the convex portion 7 formed on the vertical wall portion 6b is manufactured from the blank 8, the convex portion 7 pre-formed on the blank 8 can be arranged between the adjacent support portions 64 in the cross direction Z. Thus, it is possible to prevent the convex portion 7 from contacting the first die 110 when the blank 8 is press formed. As a result, the formed product 6 can be manufactured efficiently.

[0152] In addition, similarly to the multiple support portions 24 in the above-mentioned embodiment, the height (position of the top) of the multiple support portions 64 can also be appropriately changed in accordance with the shape and size of the molded product 6. Therefore, the positions of the tops of the multiple support portions 64 in the stamping direction X can be different from each other. Similar to the above-mentioned embodiment, the shape and size of other parts of the stamping forming device 100 can also be appropriately changed in accordance with the shape and size of the molded product 6, but detailed description is omitted. In addition, the flange portion 6c may not be formed, but detailed description is omitted. In the embodiment described later, the flange portion may also not be formed.

[0153] (Variation Example)

[0154] In the above embodiment, the second die 120 is described as having one die 70, but the structure of the second die 120 is not limited to the above example. Fig.28As in the press forming device 100 shown in FIG. 1 , the dies 70 may be provided on both sides of the pad 80 in the width direction Y. In this case, for example, Fig.28 As shown in FIG. 1 , the blank 8 is arranged in such a manner that the plurality of protrusions 7 are located on both sides of the punch head 63 (plural support portions 64) in the width direction Y and each protrusion 7 is located between two adjacent support portions 64 in the cross direction Z, and the blank 8 is stamped. Thus, it is possible to manufacture the blank 8 while preventing each protrusion 7 from contacting the first die 110 during stamping. Figure 1 The hat-shaped molded product shown in (c) is also Fig.28 In the press forming device 100 shown, the backing plate 80 may not be provided, but detailed description thereof is omitted. In this case, a cap-shaped molded product can be manufactured while preventing each convex portion 7 from contacting the first die 110 during press forming.

[0155] In the above embodiment, the punch portion 63 of the first die 110 is configured so that adjacent support portions 64 are spaced apart with the opening portion 63b interposed therebetween. However, the structure of the punch portion of the first die 110 is not limited to the above example. Fig.29 As shown, the punch portion 63 of the first die 110 may further include a connecting portion 65 that connects adjacent support portions 64 .

[0156] Reference Fig.29 In the present embodiment, the connecting portion 65 is provided at the opening portion 63b. In other words, in the present embodiment, each opening portion 63b has a connecting portion 65. Similar to the supporting portion 64, each connecting portion 65 is provided to protrude from the first supporting surface 62 along the stamping direction X. In the present embodiment, the side surface 63a of the punch portion 63 is composed of a plurality of side surfaces 64a of a plurality of supporting portions 64 and a plurality of side surfaces 65a of a plurality of connecting portions 65. In addition, in the present embodiment, the plurality of supporting portions 64 of the punch portion 63 also protrude from the first supporting surface 62 to the other side in the stamping direction X. The plurality of supporting portions 64 are provided to be spaced apart from each other and arranged along the cross direction Z. In the stamping direction X (refer to Fig. 27 ), the distance between the side surface 65a of the connecting portion 65 and the wall surface 74 of the die 70 is larger than the distance between the side surface 64a of the supporting portion 64 and the wall surface 74. That is, in the width direction Y, the space between the connecting portion 65 and the wall surface 74 is larger than the space between the supporting portion 64 and the wall surface 74. In the present embodiment, in the stamping direction X, the top of the supporting portion 64 is located closer to the other side (the second die 120 side) than the top of the connecting portion 65.

[0157] When the blank 8 is press-formed, the blank 8 is first supported by the plurality of support portions 64 of the punch head 63. More specifically, the blank 8 is supported by the plurality of support portions 64 in such a manner that each convex portion 7 is located on one side of the plurality of support portions 64 in the width direction Y and between two adjacent support portions 64 in the cross direction Z, and is protruded toward one side in the press direction X (the first die 110 side).

[0158] Next, similarly to the above-mentioned embodiment, the pad 80 (second supporting surface 82) is moved to one side in the punching direction X, and the plate-like portion 8a is clamped by the plurality of supporting portions 64 and the second supporting surface 82. After that, the die 70 (punching surface 72) is relatively moved from the other side (second die 120 side) to one side (first die 110 side) relative to the top of the plurality of supporting portions 64 in the punching direction X. As a result, the portion of the plate-like portion 8a that is closer to one side than the plurality of supporting portions 64 in the width direction Y is pressed to one side in the punching direction X. As a result, the plate-like portion 8a is subjected to bending deformation, and the formed product 6 is completed. In the present embodiment, too, at the forming lower dead point of the relative movement between the first die 110 and the second die 120 in the punching direction X, the wall surface 74 of the die 70 is opposite to the side surface 63a of the punch head 63 through a part of the plate-like portion 8a, and each convex portion 7 enters the opening 63b without contacting the side surface 63a.

[0159] In the present embodiment as well, when manufacturing the molded product 6 from the blank 8, the convex portion 7 pre-formed on the blank 8 can be arranged between adjacent support portions 64 in the cross direction Z. Thus, it is possible to prevent the convex portion 7 from contacting the first die 110 when the blank 8 is press-formed. As a result, the molded product 6 can be manufactured efficiently.

[0160] In addition, similarly to the above-mentioned embodiment, the height (position of the top) of the plurality of support portions 64 may also be appropriately changed in accordance with the shape and size of the molded product 6. Therefore, the positions of the tops of the plurality of support portions 64 in the punching direction X may also be different from each other. In addition, the positions of the tops of the plurality of connecting portions 65 in the punching direction X may also be different from each other. In addition, in the punching direction X, the position of the top of at least one support portion 64 of the plurality of support portions 64 and the position of the top of the connecting portion 65 adjacent to the support portion 64 may be different, and the positions of the tops of the plurality of support portions 64 and the positions of the tops of the plurality of connecting portions 65 may also be the same as each other.

[0161] In the press forming device 100 having a plurality of connecting portions 65, Fig.28 Similarly to the stamping forming device 100 shown in FIG. 1 , the dies 70 may be provided on both sides of the backing plate 80, but this is omitted in the figure. Thus, it is possible to manufacture the product while preventing the convex portions 7 from contacting the first die 110 during stamping. Figure 1 The hat-shaped molded product shown in (c) is also Fig.28 Similarly, in the press forming apparatus 100 shown, when two dies 70 are provided, the backing plate 80 may not be provided, but a detailed description thereof will be omitted.

[0162] Industrial Applicability

[0163] According to the present invention, it is possible to efficiently manufacture a molded product having a flange portion facing a top plate portion and a molded product having a convex portion formed on a vertical wall portion.

[0164] Description of Reference Numerals

[0165] 3, 6, formed product; 4, 8, blank; 5, through hole; 7, convex portion; 10, 100, stamping device; 12, 110, first die; 14, 120, second die; 20, 60, punch; 22, 62, first supporting surface; 24, 64, supporting portion; 40, 70, die; 42, 72, stamping surface; 44, 74, wall surface; 50, 80, pad; 52, 82, second supporting surface.

Claims

1. A stamping forming device, wherein: The press forming device includes a first die and a second die, the first die and the second die are located at positions opposite to each other in a press direction and move relatively in the press direction. The first die includes a first support surface and a punch portion protruding from the first support surface. The second die includes: a punching surface disposed at a position offset from a position opposite to the punch head in the punching direction; and a wall surface continuous with the punching surface. When viewed from the second die side in the punching direction, the punch head has a side surface facing the wall surface and including an opening portion opening toward the wall surface side. The wall surface faces the side surface of the punch portion when the first die and the second die are at a lower dead point of relative movement in the punching direction.

2. The stamping forming device according to claim 1, wherein: The punch head has a plurality of supporting parts. The side surface of the punch portion is constituted by the side surfaces of the plurality of support portions, The side surfaces of two adjacent support portions among the plurality of support portions are arranged at a distance from each other with the opening interposed therebetween.

3. The stamping forming device according to claim 2, wherein: The opening portion has a connecting portion that connects two adjacent supporting portions among the plurality of supporting portions. When viewed from the second die side in the pressing direction, a distance between a side surface of the connecting portion and the wall surface is longer than a distance between a side surface of the supporting portion and the wall surface.

4. The stamping forming device according to claim 2 or 3, wherein: The opening portion has a connecting portion that connects two adjacent supporting portions among the plurality of supporting portions. In the punching direction, a position of a top of at least one of the plurality of support portions is different from a position of a top of the connecting portion adjacent to the support portion.

5. The press forming device according to any one of claims 2 to 4, wherein: In the punching direction, a position of a top portion of at least one of the plurality of support portions is different from positions of top portions of the other support portions.

6. The press forming device according to any one of claims 1 to 5, wherein: The second die includes a backing plate disposed at a position opposed to the punch head in the punching direction.

7. A method for manufacturing a molded product, wherein: The blank is punched and formed by relatively moving a first die and a second die that are opposed to each other in the punching direction with the blank sandwiched therebetween in the punching direction, The first die includes a first support surface and a punch portion protruding from the first support surface. The second die includes: a punching surface disposed at a position offset from a position opposite to the punch head in the punching direction; and a wall surface continuous with the punching surface. The blank has a first plate-shaped portion and a second plate-shaped portion opposite to the first plate-shaped portion in the punching direction. In a state where the first plate-shaped portion is supported by the first supporting surface from the first die side, and the second plate-shaped portion is supported by the punch portion that crosses the first plate-shaped portion in the punching direction from the first die side, The second plate-shaped portion is subjected to bending deformation by the punching surface that moves relative to the punch head in the punching direction, When the first die and the second die are at a lower dead point of relative movement in the punching direction, the wall surface faces the side surface of the punch head via a part of the second plate-shaped portion.

8. The method for manufacturing a molded product according to claim 7, wherein: When the second plate-shaped portion is supported by the punch portion, the punch portion traverses the first plate-shaped portion by passing through the through hole formed in the first plate-shaped portion.

9. A method for manufacturing a molded product, wherein: The blank is punched and formed by relatively moving a first die and a second die that are opposed to each other in the punching direction with the blank sandwiched therebetween in the punching direction, The first die includes a first support surface and a punch portion protruding from the first support surface. The second die includes: a punching surface disposed at a position offset from a position opposite to the punch head in the punching direction; and a wall surface continuous with the punching surface. When viewed from the second die side in the punching direction, the punch head has a side surface facing the wall surface and including an opening portion opening toward the wall surface side. The blank has a plate-shaped portion and a convex portion protruding from the plate-shaped portion in a thickness direction of the plate-shaped portion. In a state where the plate-like portion is supported by the punch portion from the first die side in the punching direction, The plate-like portion is subjected to bending deformation by using the punching surface that moves relative to the punch head in the punching direction, When the first die and the second die are at the lower dead point of relative movement in the punching direction, the wall surface is opposite to the side surface of the punch head via a part of the plate-like portion, and the convex portion enters the opening portion without contacting the side surface.

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