Manufacturing method and manufacturing device for press-molded products

Abstract

To realize high producibility through one-process press molding and to suppress cracking of a hat-shaped press-molded product in press molded product manufacturing method and manufacturing apparatus.SOLUTION: A manufacturing method for a press molded product 100 is used for manufacturing a press molded product which is long and has a curved part 110 that curves in a longer direction. The manufacturing method includes: a step at which a metal plate 100 including a product part 101 which is used as a product and an excess part 102 which is not used as a product is prepared; a step at which press molding for simultaneously performing formation of the curved part 110, molding of a hat shape in the product part 101, and formation of a folded part 141 by folding a hat shape in the excess part 102 to a projection direction is executed; and a step at which after press molding, the excess part 102, in which the folded part 141 has been formed, is removed.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a method and an apparatus for manufacturing a press-formed product. [Background technology]

[0002] As vehicle body parts, press-formed products obtained by press-forming a metal plate into a hat shape are sometimes used. In such hat-shaped press-formed products, unintended cracks and deformations may occur during press forming, and high-quality press-formed products that suppress such cracks and deformations are required. For example, Patent Document 1 discloses a method for manufacturing a press-formed product that suppresses specific bending deformations in hat-shaped press-formed products. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2016-203254 A Summary of the Invention [Problem to be solved by the invention]

[0004] The manufacturing method of the press-formed product in Patent Document 1 requires multiple press forming steps, and there is room for improvement in the number of steps. In addition, when a metal plate is press-formed into a hat shape, cracks may occur due to a reduction in plate thickness. However, Patent Document 1 does not disclose in detail a method for suppressing such cracks, and there is also room for improvement in suppressing cracks.

[0005] The present invention has an object to provide a manufacturing method and apparatus for a press-molded product that achieves high manufacturing efficiency through a single press molding process and suppresses cracks in the press-molded product formed into a hat shape. [Means for solving the problem]

[0006] The first aspect of the present invention is A method for manufacturing a press-molded product having a long curved portion curved in a longitudinal direction, comprising: A metal plate material is prepared, the metal plate material including a product portion to be used as a product and an excess portion not to be used as the product; performing press molding to simultaneously form the curved portion, form the hat shape in the product portion, and form a bent portion by bending the excess portion in a convex direction of the hat shape; After the press molding, the excess portion in which the bent portion is formed is removed. The present invention provides a method for manufacturing a press-molded product, comprising:

[0007] According to this method, the formation of the curved portion, the hat-shaped product portion, and the bent portion of the surplus portion are simultaneously performed. That is, the plate material can be formed into a required shape by one press process (one stroke), so that high manufacturing efficiency can be realized. In addition, a bent portion is formed in the surplus portion and is later removed. Since the surplus portion is not used as a product, the bent portion does not appear in the final product shape. However, since the bent portion is formed in the manufacturing process, the reduction rate of the plate thickness in the product portion can be reduced, and cracks in the product portion can be suppressed. This is because the bent portion is formed by bending in the convex direction of the hat shape, and a compressive force acts on the convex side surface of the plate material. The convex side surface of the plate material is stretched by press molding, so that the plate thickness is reduced and cracks are likely to occur. In contrast, since the compressive force can be applied so as to reduce the reduction rate of the plate thickness, cracks in the product portion can be effectively suppressed. In other words, if the bent portion is formed by bending in the opposite direction to the convex direction of the hat shape, the effect of suppressing such cracks cannot be obtained. Furthermore, when the press-formed product has a curved portion, such cracking problems are likely to occur at the curved portion, and the above method is therefore effective.

[0008] The bending angle of the bent portion may be not less than 2.5 degrees and not more than 37.5 degrees.

[0009] According to this method, cracks in the press-formed product can be effectively suppressed. As a result of the analysis, it was confirmed that cracks in the press-formed product can be effectively suppressed within the above bending angle range. In detail, if the bending angle is smaller than 2.5 degrees, the reduction in the plate thickness of the product part (the upper surface part of the hat shape) cannot be effectively suppressed. Also, if the bending angle is larger than 37.5 degrees, wrinkles may occur in the product part, which may impair the appearance.

[0010] The curved portion may have a radius of curvature of 50 mm or more and 400 mm or less.

[0011] According to this method, cracks in the press-formed product can be effectively suppressed. As a result of the analysis, it was confirmed that cracks in the press-formed product can be effectively suppressed within the above-mentioned range of the radius of curvature. In detail, if the radius of curvature is smaller than 50 mm, cracks may occur even if a bent portion is provided. Also, if the radius of curvature is larger than 400 mm, not only is the above-mentioned crack problem unlikely to occur because the reduction rate of the plate thickness of the product portion is small, but the bent portion may not effectively contribute to the reduction of the plate thickness.

[0012] The bent portion may be provided over the entire length of the plate.

[0013] According to this method, a die for manufacturing a press-molded product can be easily designed.

[0014] The bent portion may be provided only in a portion including the curved portion in the longitudinal direction.

[0015] According to this method, the reduction rate of the plate thickness in the curved portion where the above-mentioned cracking problem is likely to occur can be reduced, and cracking can be effectively suppressed.

[0016] forming a step shape in the excess portion; The bent portion may be included in the step shape.

[0017] According to this method, the step shape can apply a compressive force to the convex surface of the plate material, reducing the reduction rate of the plate thickness and effectively suppressing cracks. In addition, the step shape can press the plate material on a surface perpendicular to the pressing direction, realizing stable press forming.

[0018] The press-formed product may be a front side member of a vehicle body part.

[0019] According to this method, cracks can be effectively suppressed in the front side member, which is prone to cracking problems. In addition, the front side member is a part that receives impact during a front collision of the vehicle body, and high reliability is required from the viewpoint of collision safety performance. Therefore, it is effective to be able to manufacture the front side member as a high-quality press-formed product by the above method.

[0020] A second aspect of the present invention is A manufacturing apparatus for a press-molded product having a long curved portion that is curved in a longitudinal direction, a press molding machine for simultaneously forming the curved portion, forming a hat shape in the product portion, and forming a bent portion by bending the surplus portion in a convex direction of the hat shape, on a metal plate material including a product portion to be used as a product and a surplus portion not to be used as the product; a cutting machine for removing the excess portion in which the bent portion is formed after molding by the press molding machine; The present invention provides an apparatus for manufacturing a press-molded product, comprising: Effect of the Invention

[0021] According to the present invention, in the manufacturing method and manufacturing apparatus for a press-formed product, high manufacturing efficiency can be achieved by a single press forming step, and cracks in the press-formed product formed into a hat shape can be suppressed. [Brief description of the drawings]

[0022] [Figure 1] FIG. [Diagram 2]FIG. 2 is a top view of the rear portion of the front side member of FIG. 1. [Diagram 3] FIG. 2 is a perspective view showing a state before manufacturing in the manufacturing method of the press-molded product according to the first embodiment. [Figure 4] FIG. 2 is a perspective view showing a state during production according to the method for producing a press-molded product according to the first embodiment. [Diagram 5] 5 is a cross-sectional view perpendicular to the longitudinal direction of a press-formed product including a surplus portion corresponding to FIG. 4. [Figure 6] FIG. 2 is a perspective view showing a state after production by the production method of the press-molded product according to the first embodiment. [Figure 7] 1 is a perspective view showing a manufacturing apparatus for a press-formed product according to a first embodiment and a plate material before being formed; [Figure 8] 1 is a perspective view showing a press-formed product manufacturing apparatus according to a first embodiment and a plate material after forming. [Figure 9] 13 is a graph showing the relationship between the bending angle of the bent portion and the plate thickness reduction rate of the upper wall. [Figure 10] 13 is a graph showing the relationship between the bending angle of the bent portion for each radius of curvature of the curved portion and the plate thickness reduction rate of the upper wall. [Figure 11] FIG. 11 is a perspective view showing a state during production according to the manufacturing method of the press-molded product according to the second embodiment. [Figure 12] FIG. 12 is a side view of the curved portion of FIG. 11 . [Figure 13] 13 is a cross-sectional view perpendicular to the longitudinal direction of a press-formed product, showing a state during production by a manufacturing method for a press-formed product according to a third embodiment. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. In the following, terms indicating orientations such as up and down are used for convenience of illustration and description, but are not intended to limit the orientation as an actual arrangement.

[0024] (First embodiment) 1, in this embodiment, a method for manufacturing a front side member 100 of a vehicle body part will be described as an example of a method for manufacturing a press-formed product 100. However, the subject of the press-formed product 100 is not limited to the front side member 100, and various parts may be the subject of the method. For example, the subject of the method may be a rear side member (not shown) of a vehicle body part.

[0025] The front side members 100 are long members extending in the front-rear direction of the vehicle body 1 at both front side portions of the vehicle body 1. The front side members 100 connect a bumper 10 at the front of the vehicle body 1 to a passenger compartment portion 20 at the center of the vehicle body 1.

[0026] Also referring to Fig. 2, the front side member 100 is disposed so that its longitudinal direction coincides with the front-rear direction (see double arrow A) of the vehicle body 1, and has a curved portion 110 that is curved with respect to the longitudinal direction. The curved portion 110 is curved with a radius of curvature R. Although details will be described later, in this embodiment, the front side member 100 has the curved portion 110 with a radius of curvature R of 50 mm or more and 400 mm or less. Note that Fig. 2 shows only the rear portion, not the entire front side member 100.

[0027] The front side member 100 has a hat shape in a cross section perpendicular to the longitudinal direction. Details of the hat shape are clearly shown using schematic drawings from Fig. 3 onwards. From Fig. 3 onwards, a manufacturing method for the press-formed product 100, which is a schematic illustration of the front side member 100, will be described.

[0028] A manufacturing method of the press-formed product 100 of this embodiment will be described in detail with reference to Figures 3 to 6. In the manufacturing process of Figures 3 to 6, the pre-manufacturing state is referred to as a plate material 100 (see Figure 3), but the intermediate manufacturing state (see Figures 4 and 5) and the completed state (see Figure 6) are referred to as the press-formed product 100 without distinction.

[0029] 3, the plate material 100 is made of a flat metal plate. The plate material 100 may be made of, for example, high tension steel or an aluminum alloy. The plate material 100 includes a product portion 101 that is used as a product, and a surplus portion 102 (see the shaded portion) that is not used as a product.

[0030] Referring to Figure 4, the above plate material 100 is press-molded to simultaneously form a curved portion 110, form a hat shape in the product portion 101, and form a bent portion 141 by bending the surplus portion 102 in the convex direction of the hat shape (upward in Figure 4).

[0031] 4 and 5, the press-formed product 100 has a hat shape that is symmetrical with respect to a center line CL. The press-formed product 100 has an upper wall 120, two side walls 130 extending from both ends of the upper wall 120 and facing each other, and flanges 140 extending from the respective ends of the two side walls 130.

[0032] The top wall 120 has a flat top surface 120a. Alternatively, the top surface 120a of the top wall 120 may be curved. The top wall 120 is included in the product portion 101.

[0033] Each of the two side walls 130 extends generally perpendicular to the top wall 120. The two side walls 130 are included in the product portion 101.

[0034] The flange 140 has a bent portion 141 bent at a bending angle θ. In detail, the flange 140 has a base end 142 extending from each end of the two side walls 130 approximately parallel to the upper wall 120, a distal end 143 extending from the base end 142 at an incline of the bending angle θ in the convex direction of the hat shape (upward in FIG. 5), and the bent portion 141 connecting them. The bent portion 141 and the distal end 143 are included in the surplus portion 102. The base end 142 is included in both the product portion 101 and the surplus portion 102. That is, the boundary B (see the two dashed lines) between the product portion 101 and the surplus portion 102 is located on the base end 142.

[0035] In this embodiment, the bending angle θ is equal to or greater than 2.5 degrees and equal to or less than 37.5 degrees, as will be described in detail later. The bent portion 141 is provided over the entire length of the press-molded product 100 (see FIG. 4).

[0036] 6, after the press molding, the excess portion 102 is removed. The method for removing the excess portion 102 is not particularly limited, but the excess portion 102 may be cut off from the product portion 101, for example.

[0037] A manufacturing apparatus 200 for manufacturing the press-formed product 100 for carrying out the above-mentioned press forming will be described with reference to FIGS.

[0038] The manufacturing apparatus 200 for the press-molded product 100 has a press molding machine 201. The press molding machine 201 has an upper die 210 and a lower die 220. The upper die 210 and the lower die 220 are driven by a driving mechanism (not shown) to move up and down.

[0039] The upper die 210 and the lower die 220 have shapes complementary to the shape of the press-molded product 100 including the excess portion 102 (see FIGS. 4 and 8).

[0040] The upper mold 210 has, on its lower surface, a concave surface 211 for forming the hat shape, and a flat surface 212 and an inclined surface 213 for forming the base end 142, the bent portion 141, and the end portion 143. The upper mold 210 also has, on its lower surface, a curved surface 214 for forming the curved portion 110.

[0041] The lower mold 220 has, on its upper surface, a convex surface 221 for forming the hat shape, and a flat surface 222 and an inclined surface 223 for forming the base end 142, the bent portion 141, and the end portion 143. The lower mold 220 also has, on its lower surface, a curved surface 224 for forming the curved portion 110.

[0042] The plate material 100 (see FIG. 7) is sandwiched between the upper die 210 and the lower die 220, and is press-formed into the shape of the press-formed product 100 (see FIG. 8) including the excess portion 102. In practice, shock absorbing pads and holders for holding the plate material 100 may be used, but illustration and description thereof will be omitted here.

[0043] As a device for removing the excess portion 102 after the press molding, for example, a known cutting machine may be used. Here, illustration and description of the known cutting machine are omitted.

[0044] According to this embodiment, the formation of the curved portion 110, the hat-shape of the product portion 101, and the formation of the bent portion 141 of the surplus portion 102 are performed simultaneously. That is, the plate material 100 can be formed into a required shape by one-step (one-stroke) press forming, so that high manufacturing efficiency can be realized. In addition, the bent portion 141 is formed in the surplus portion 102 and is later removed. Since the surplus portion 102 is a portion that is not used as a product, the bent portion 141 does not appear in the final product shape. However, since the bent portion 141 is formed during the manufacturing process, the reduction rate of the plate thickness in the product portion 101 can be reduced, and cracks in the product portion 101 can be suppressed. This is because the bent portion 141 is formed by bending in the hat-shape convex direction, and a compressive force acts on the convex side surface of the plate material 100 (particularly the upper surface 140a of the flange 140). The convex side surface of the plate material 100 (particularly the upper surface 120a of the upper wall 120) is stretched by press forming, so that the plate thickness is reduced and cracks are likely to occur. In response to this, the above-mentioned compressive force can be applied so as to reduce the rate of reduction in plate thickness, so that cracks in the product portion 101 can be effectively suppressed. In other words, if the bent portion 141 is formed by bending in the opposite direction to the convex direction of the hat shape, the effect of suppressing such cracks cannot be obtained. Furthermore, if the press-formed product has a curved portion 110, such cracks are likely to occur in the curved portion 110, and the manufacturing method and manufacturing apparatus 200 of this embodiment function effectively.

[0045] Furthermore, according to this embodiment, the bending angle θ (see FIG. 5) of the bent portion 141 is equal to or greater than 2.5 degrees and equal to or less than 37.5 degrees, so that cracking of the press-molded product 100 can be effectively suppressed. As a result of analysis, it was confirmed that cracking of the press-molded product 100 can be effectively suppressed within the above-mentioned range of bending angle θ. In particular, if the bending angle θ is smaller than 2.5 degrees, it is not possible to effectively suppress a reduction in the plate thickness of the product portion 101 (particularly the upper wall 120). Furthermore, if the bending angle θ is larger than 37.5 degrees, wrinkles may occur in the product portion 101, which may impair the appearance.

[0046] 9 is a graph showing the relationship between the bending angle θ (see FIG. 5) of the bent portion 141 and the thickness reduction rate δ of the upper wall 120 as a result of the above analysis. The horizontal axis represents the bending angle θ (°) of the bent portion 141, and the vertical axis represents the thickness reduction rate δ (%) of the upper wall 120.

[0047] In the analysis, the thickness of the plate material 100 was set to 1.4 mm. The material of the plate material 100 was set to 1470 MPa class high tension steel and 5000 series aluminum alloy. In addition, the shape of the press-molded product 100 to be manufactured (see FIG. 5) was set to have an upper wall 120 and two side walls 130 formed perpendicularly. The upper mold 210 was set to have a concave surface 211 with a width of 70 mm, a depth of 60 mm, and a flat surface 212 with a length of 20 mm. The lower mold 220 was set by offsetting the upper mold by the thickness of the plate material 100. The radius of curvature of the curved surface 214 of the upper mold 210 and the radius of curvature of the curved surface 224 of the lower mold 220 were both set to 140 mm. The upper mold 210 and the lower mold 220 were set as rigid bodies that do not deform. As mentioned above, in practice, shock absorbing pads and holders for holding down the plate material 100 may be used, but the description thereof will be omitted here.

[0048] In the graph of FIG. 9, when the bending angle θ is in the range of 0 to 2.5°, the sheet thickness reduction rate δ is about 9 to 11%, whereas when the bending angle θ is in the range of 2.5 to 37.5°, the sheet thickness reduction rate δ is about 6 to 9%. Therefore, it can be confirmed that the sheet thickness reduction rate δ is reduced in the latter range compared to the former range. In addition, although data in the range of bending angles θ greater than 37.5° is not plotted in the graph, in this range, wrinkles were generated in the product portion 101, resulting in a loss of appearance. Therefore, it was confirmed that the bending angle θ of the bent portion 141 is preferably 2.5° or more and 37.5° or less.

[0049] Furthermore, according to this embodiment, the radius of curvature R of the curved portion 110 is 50 mm or more and 400 mm or less, so that cracks in the press-formed product 100 can be effectively suppressed. As a result of the analysis, it was confirmed that cracks in the press-formed product 100 can be effectively suppressed within the range of the radius of curvature R. In detail, if the radius of curvature R is smaller than 50 mm, cracks may occur even when the bent portion 141 is provided. Furthermore, if the radius of curvature R is larger than 400 mm, not only is the above-mentioned problem of cracks unlikely to occur because the reduction rate of the plate thickness of the product portion 101 is small, but the bent portion 141 may not effectively contribute to the reduction of the plate thickness.

[0050] 10 shows a graph illustrating the relationship between the bending angle θ (see FIG. 5) of the bent portion 141 for each curvature radius R of the curved portion 110 and the plate thickness reduction rate δ of the upper wall 120. The horizontal axis represents the bending angle θ (°) of the bent portion 141, and the vertical axis represents the plate thickness reduction rate δ (%) of the upper wall 120.

[0051] The analytical conditions were set substantially the same as in the above analysis, but results were obtained for the curvature radius R of the curved portion 110 of 50 mm, 100 mm, 140 mm, 200 mm, 400 mm, and 500 mm.

[0052] In the graph of FIG. 10, when the radius of curvature R of the curved portion 110 is in the range of 50 mm or more and 400 mm or less, the plate thickness reduction rate δ is about 4 to 14%, that is, the plate thickness is significantly reduced by press forming, and problems such as cracks are likely to occur. In addition, when the bending angle θ of the bent portion 141 is increased, the plate thickness reduction rate δ is reduced, and the effect of reducing the plate thickness reduction rate δ by the bent portion 141 can be confirmed. In contrast, when the radius of curvature R of the curved portion 110 is 500 mm or more, the plate thickness reduction rate δ of the upper wall 120 is about 2 to 3%, that is, the plate thickness is not significantly reduced by press forming, and problems such as cracks are unlikely to occur. In addition, when the radius of curvature R of the curved portion 110 is 50 mm, cracks were confirmed when the bending angle θ was small, so data for bending angles θ of 0 to 15° is not shown. From these results, it can be seen that the smaller the radius of curvature R, the larger the plate thickness reduction rate δ of the upper wall 120, and the more necessary it is to suppress cracks, and the more necessary it is to provide the bent portion 141. Therefore, it was confirmed that the preferable radius of curvature R of the curved portion 110 for application is 50 mm or more and 400 mm or less. In addition, since the data for R50, R100, R140, and R200 show that the plate thickness reduction rate δ was further reduced by providing the bent portion 141, it was confirmed that the more preferable radius of curvature R of the curved portion 110 is 50 mm or more and 200 mm or less.

[0053] Furthermore, according to this embodiment, since the bent portions 141 are provided over the entire length of the press-molded product 100, the mold (the upper wall 120 and the lower mold 220) for manufacturing the press-molded product 100 can be designed easily.

[0054] Moreover, according to this embodiment, cracks can be effectively suppressed in the front side member 100, which is prone to cracking problems. The front side member 100 is a part that receives an impact in the event of a front collision of the vehicle body 1, and is required to have high reliability from the viewpoint of collision safety performance. Therefore, it is effective that the front side member 100 can be manufactured as a high-quality press-formed product 100 according to this embodiment.

[0055] Second embodiment 11, the second embodiment differs from the first embodiment in the range in which the bent portion 141 is formed. Other than this, the second embodiment is substantially the same as the first embodiment. Therefore, the description of the parts shown in the first embodiment may be omitted.

[0056] In this embodiment, the bent portion 141 is provided only in a portion including the curved portion 110 in the longitudinal direction of the press-formed product 100. In other words, the bent portion 141 is not formed in a portion away from the curved portion 110.

[0057] 12, "only a portion including the curved portion 110" refers to a region including the entire curved portion 110 (see the hatched portion) connecting two straight portions 111 of the press-molded product 100 when the curved portion 110 is viewed from the side. Note that "only a portion including the curved portion 110" may partially include the two straight portions 111.

[0058] The manufacturing apparatus 200 for the press-molded product 100 in this embodiment, although not shown in detail, is configured by limiting the range of the inclined surfaces 213, 223 for forming the bent portion 141 in the manufacturing apparatus 200 shown in the first embodiment (see Figures 7 and 8) to a partial area including the curved portion 110.

[0059] According to this embodiment, it is possible to reduce the reduction rate of the plate thickness of the curved portion 110, where cracking problems are likely to occur, and thus it is possible to efficiently suppress cracking.

[0060] Third embodiment 13, the shape of the end portion 143 of the flange 140 is different from that of the first embodiment. Other than this, the third embodiment is substantially the same as the first embodiment. Therefore, the description of the parts shown in the first embodiment may be omitted.

[0061] In this embodiment, the end portion 143 of the flange 140 has a bent portion 143a bent to form a step shape. In detail, the end portion 143 has an inclined portion 143b extending from the base end portion 142 via the bent portion 141 at an inclination angle θ, a step upper portion 143c extending approximately parallel to the upper wall 120, and a bent portion 143a connecting them. Therefore, the step shape is formed by the base end portion 142, the bent portion 141, and the end portion 143 (the inclined portion 143b, the bent portion 143a, and the step upper portion 143c).

[0062] Although not shown in detail, the manufacturing apparatus 200 for the press-molded product 100 of this embodiment is configured by modifying the manufacturing apparatus 200 shown in the first embodiment (see FIGS. 7 and 8) so as to form a step shape in the excess portion 102.

[0063] According to this embodiment, the step shape allows a compressive force to be applied to the convex surface (upper surface in FIG. 13) of the plate material 100, reducing the reduction rate of the plate thickness and effectively suppressing cracks. In addition, when forming the base end portion 142 and the step upper portion 143c that constitute the step shape, the plate material 100 can be pressed on a surface perpendicular to the pressing direction, thereby realizing stable press forming.

[0064] Although the specific embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications can be made within the scope of the present invention. For example, an appropriate combination of the contents of each embodiment may be one embodiment of the present invention. [Explanation of symbols]

[0065] 1. Vehicle body 10. Bumper 20 Cabin area 100 Press-molded product (front side member) (sheet material) 101 Product Department 102 Surplus 110 Curved section 111 Straight section 120 Upper Wall 120a top side 130 Side wall 140 Flange 140a top surface 141 Bend section 142 Proximal end 143 End 143a Bend section 143b Slope 143c Upper part of step 200 Manufacturing equipment 201 Press molding machine 210 Upper mold 211 Concave 212 Flat surface 213 Slope 214 Curved Surface 220 Lower mold 221 Convex 222 Flat surface 223 Slope 224 Curved Surface

Claims

1. A method for manufacturing a press-molded product having a long curved portion that is curved in a longitudinal direction and a height direction, A metal plate material is prepared, the metal plate material including a product portion to be used as a product and an excess portion not to be used as the product; performing press molding to simultaneously form the curved portion, form a hat shape in the product portion, and form a bent portion by bending the excess portion in a convex direction of the hat shape; After the press molding, the excess portion in which the bent portion is formed is removed. A method for manufacturing a press-molded product, comprising:

2. The method for manufacturing a press-molded product according to claim 1 , wherein a bending angle of the bent portion is equal to or greater than 2.5 degrees and equal to or less than 37.5 degrees.

3. The method for producing a press-molded product according to claim 1 or 2, wherein a radius of curvature of the curved portion is 50 mm or more and 400 mm or less.

4. The method for manufacturing a press-formed product according to claim 1 , wherein the bent portion is provided over the entire length of the press-formed product.

5. The method for manufacturing a press-formed product according to claim 1 , wherein the bent portion is provided only in a portion including the curved portion in the longitudinal direction.

6. forming a step shape in the excess portion; The method for manufacturing a press-formed product according to claim 1 , wherein the bent portion is included in the step shape.

7. The method for manufacturing a press-formed product according to any one of claims 1 to 6, wherein the press-formed product is a front side member of a vehicle body part.

8. A manufacturing apparatus for a press-molded product having a long curved portion that is curved in a longitudinal direction and a height direction, a press molding machine for simultaneously forming the curved portion, forming a hat shape in the product portion, and forming a bent portion by bending the surplus portion in a convex direction of the hat shape, on a metal plate material including a product portion to be used as a product and a surplus portion not to be used as the product; a cutting machine for removing the excess portion in which the bent portion is formed after molding by the press molding machine; An apparatus for manufacturing a press-molded product comprising:

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