JP6022363B2 - Mold for manufacturing metal parts with solid edges - Google Patents

Description

  The present invention relates to a metal mold for manufacturing a metal part with a three-dimensional edge, and more specifically, for manufacturing a metal part with a three-dimensional edge by press molding, and a metal plate (for example, a high tensile strength (TS) of 590 MPa or more. The present invention relates to a metal mold for manufacturing a metal part with a three-dimensional edge, which is used to form a three-dimensional edged metal part by forming a curved edge part provided on a blank of a high-strength steel plate or a blank part adjacent to the curved edge part.

  Here, the solid at the three-dimensional edge is a vertical wall, a mountain shape, or a solid in which one of them is connected to the other. The blank is a raw material for forming, and is a single flat plate cut out from an original plate and provided with a planar contour shape corresponding to the three-dimensional shape after the forming process.

  Conventionally, as a means of obtaining a metal part with a three-dimensional shape, for example, a vertical wall, at the bent edge, press forming (hereinafter referred to as conventional press forming) in which various forms of bending, drawing, and stretch flange are combined with a single metal plate is performed. In addition, as a method for obtaining dimensional accuracy, a method of providing a divergent step in the vertical wall portion (Patent Document 1) and a method of forming the flange portion in two stages (Patent Document 2) have been proposed and twisted. As a method for preventing this, a method of performing bending molding in two stages (Patent Document 3) and a method of applying stress to a vertical wall (Patent Document 4) have been proposed.

JP 2010-5651 A JP 2006-289480 A JP 2009-241109 A JP 2006-305627 A

  Increasing the strength of steel sheets in response to demands for weight reduction leads to a reduction in steel sheet drawing, overhanging, and stretch flangeability. When a high-strength steel sheet blank is formed and a part with a solid wall, for example a vertical wall, is produced, if the edge is straight, it can be formed into a vertical wall by bending. When the part is curved, if you try to form a vertical wall by normal press molding (stretch flange molding or draw molding), the blank edge side boundary curve and the bent part side boundary of the edge region to be the vertical wall part Since the line length differs from the curve, cracks occur when stretch flange molding is performed, and wrinkles occur when draw molding is performed. At this time, by optimizing the molding conditions such as wrinkle pressing or changing the part shape, it is possible to suppress the generation of wrinkles to a certain extent, but such a method can be used to meet the need for weight reduction, for example, It can be said that there is a limit to cope with further increase in strength of 980 MPa or more in TS.

In addition, there are problems such as forming in two stages, providing a step in the vertical wall portion, applying stress to the vertical wall portion, etc., and there are problems such as an increase in processes and a decrease in yield. Since the cracks and wrinkles are caused by the line length difference between the blank edge side boundary curve and the bent portion side boundary curve of the edge region to be the vertical wall, it cannot be a countermeasure against cracks and wrinkles.
That is, especially when the blank is a high-strength steel plate, when a solid metal part with a three-dimensional bent edge is manufactured with a conventional press mold, it is a simple process and wrinkles occur, resulting in a three-dimensional metal part with a solid edge. Therefore, there is a problem that it is extremely difficult to achieve both process simplification and product weight reduction.

  The inventors of the present invention have studied means for solving the above problems, and have obtained the following knowledge using origami as a hint. That is, although paper is a material that does not stretch or shrink, a solid body having a curved ridgeline at the edge of the paper blank can be formed by a simple folding method. By applying the folding method to the metal blank, the work material is bent and deformed with little deformation of the drawing, overhanging, and stretch flange. It is possible to produce metal parts with no solid edges.

The present invention has been made based on the above findings, and the gist thereof is as follows.
(1) A metal part with a three-dimensional edge formed from a blank cut out from a metal plate and having curved curved edges with both ends, and the bent edge part or further a blank part adjacent to the bent edge part into a three-dimensional shape A metal mold for manufacturing a metal part with a three-dimensional edge used for manufacturing a fold, and a bent line that gives either a fold or a valley fold along the bend of the bent edge is provided to the bent edge. The first-step mold used in the shape line applying step and then moving both end portions of the bent edge portion so that the distance between the both ends is narrowed or widened, whereby the bent edge portion or Furthermore, it has a 2nd process metal mold | die used for the three-dimensional shaping | molding process which solidifies the blank part adjacent to this bending edge part, The metal mold for manufacture of the metal component with a three-dimensional edge characterized by the above-mentioned.
(2) The manufacturing of the metal part with a three-dimensional edge according to (1), wherein the bent line to be applied using the first-step mold is a bent line having a bending radius of 0.5 mm to 30 mm. Mold.
(3) The first-step mold includes a flat clamping portion, and both ends or a middle of a portion to which at least one bent line is provided from one or a plurality of blank body portions from the clamping portion. The metal mold for manufacturing a metal part with a three-dimensional edge according to (1) or (2), wherein an intermediate part connected to the part is provided to the blank.
(4) The bent line is a plurality of curves, and a part of at least one of the plurality of curves has a larger curvature than a curved part connected to both sides of the part. The metal mold | die for manufacture of the metal component with a solid edge as described in any one of (1)-(3).
(5) The second-step mold is configured to move so as to narrow or widen the distance between both ends of the bent edge with respect to the molded product that has undergone the broken line applying step. The metal mold | die for manufacture of the metal component with a solid edge as described in any one of 1)-(4).
(6) The mold for manufacturing a metal part with a three-dimensional edge according to any one of (1) to (5), wherein the second process mold is configured to hold the clamping portion. .
(7) The above-mentioned (1) to (2), wherein the second step mold is configured to move both sides or one end of the bent edge with respect to the molded product that has undergone the broken line applying step. 6) A metal mold for manufacturing a metal part with a solid edge according to any one of the above.
(8) The mold for manufacturing a metal part with a three-dimensional edge according to (7), wherein the second-step mold is configured to move both ends of the bent edge using a cylindrical pin. Type.
(9) Said 2nd process metal mold | die was set as the structure which pushes the circular-arc-shaped edge part provided in the molded article formed through the said blank or the said broken line provision process, It describes to said (7) characterized by the above-mentioned. Mold for manufacturing metal parts with solid edges.
(10) Any one of the above (1) to (9), wherein the second step mold is configured to hold down a vertical wall portion that is a portion adjacent to the curved edge portion to be three-dimensionalized. Mold for manufacturing metal parts with three-dimensional edges described in 1.
(11) The metal mold with a three-dimensional edge according to any one of (1) to (10), wherein the second-step mold is configured to suppress the three-dimensionalization of the bent line. Production mold.
(12) The (2) to (11), wherein the second step mold is configured to correct a shape of a bent edge part during the three-dimensionalization or after the three-dimensionalization. The metal mold | die for manufacture of the metal component with a solid edge as described in any one of these.

  According to the present invention, the work material (material) is bent and deformed with little deformation of the drawing, overhanging, and extension flange, so that the bent edge is broken, and the three-dimensional shape is formed into a vertical wall or a chevron without wrinkles. It is possible to form a metal part with a three-dimensional edge even from a single sheet of high-strength steel sheet. Further, since the molding can be performed with almost no expansion and contraction, the three-dimensional molding can be performed even on a bent edge portion having a small radius of curvature R, which has been impossible in the conventional three-dimensional molding.

It is the schematic which shows embodiment example (1) of this invention. It is the schematic which shows embodiment example (2) of this invention. It is the schematic which shows embodiment example (3) of this invention. It is the schematic which shows embodiment example (4) of this invention. It is the schematic which shows embodiment example (5) of this invention. It is the schematic which shows embodiment example (6) of this invention. It is the schematic which shows embodiment example (7) of this invention. It is the schematic which shows embodiment example (8) of this invention. It is the schematic which shows embodiment example (9) of this invention. It is the schematic which shows embodiment example (10) of this invention.

The present invention comprises (1) a blank having a curved curved edge having both ends cut out from a metal plate, and forming the curved edge or a blank part adjacent to the curved edge in three dimensions. It is a metal mold for manufacturing a metal part with a three-dimensional edge used when manufacturing a metal part with a three-dimensional edge.
The manufacturing mold is a first-step mold used in a bent line applying process in which a bent line of either a mountain fold or a valley fold along the bent edge is bent on the bent edge. By moving the both ends of the bent edge so that the interval between the ends is narrowed or widened, the bent edge or further the blank portion adjacent to the bent edge is made three-dimensional from the bent line. And a second-step mold used in the three-dimensional molding step [Invention (1)]. Here, the curve having both ends includes a broken line having both ends.

  When a bent line is applied in the bent line applying step, the bent line is moved by moving both ends of the bent edge portion so that the distance between the ends is narrowed or widened in the next three-dimensional forming step. From the difference in line length on both sides with the boundary as a boundary, one of these sides naturally rises or sinks with respect to the other, and therefore the bent edge or the blank adjacent to the bent edge starts from the bent line. It becomes possible and easy to make the portion three-dimensional. Three-dimensionalization by the three-dimensional molding process is extremely difficult without the bent line applying process.

  In addition, as long as the 1st process die used for the above-mentioned bent line giving process can give a bent line to a blank, roll forming, sequential forming, liquid pressure forming, rubber forming, foam forming, draw forming, A mold used for any molding such as stretch molding may be used. However, considering the positional accuracy and production efficiency of the bent line, a press working mold having a mold shape corresponding to the bent shape is preferable.

  Further, the shape of the bent line is preferably a bending radius of 0.5 mm or more and 30 mm or less [present invention (2)]. Since a high-strength steel plate is inferior in bending workability to mild steel, if the bending radius of the bent wire is less than 0.5 mm, cracks may occur in the bent portion. On the other hand, when it exceeds 30 mm, it is difficult to become a starting point for three-dimensionalization in the three-dimensional molding process. In addition, in order to make a three-dimensional shaping | molding process more efficient and to prevent the crack in a bending part more effectively, it is preferable that it is a bending radius 1 mm or more and 10 mm or less.

In contrast to the first-step molded product (molded product that has undergone the above-mentioned broken line application step), the second-step mold is configured to move so as to widen or narrow the distance between both ends of the bent edge [this invention (5). ]. Such a configuration has a mechanism that applies force to both ends or one end by a jig and moves the outer side or the inner side.
In the three-dimensional molding process, both ends themselves are three-dimensionalized as both ends of the bent edge move, so that there is a problem that a mechanism is required to apply force even if both ends are three-dimensional. Furthermore, since both ends of the bent edge portion rotate around the position that is the starting point of the three-dimensionalization, it is necessary to apply a force even if both ends rotate. However, there is a problem that the mechanism is complicated in order to reproduce such movement with a mold.

  As a solution to the above problems, it is preferable that the portion to which force is applied has a curved shape. If a mechanism that pushes the end of the bent edge with a curved shape provided on the mold is used, the contact between the molded product of the first step and the mold is sequentially positioned on the curved surface with the above three-dimensionalization and rotational movement. change. As a result, the above-mentioned problem can be solved by simply moving the mold, for example, linearly. Specifically, it is sufficient if there is a mechanism for making a round hole in a blank or a first-step molded product and pressing the hole with a cylindrical pin [present invention (8)]. As another means, there is a method of making the end of the blank or the first-step molded product into an arc shape [present invention (9)].

  In order to perform molding more stably, a mechanism for moving both ends or one end while holding both ends so that the first-step molded product does not jump out of the mold is good [present invention (6 to 7)]. In the case of clamping, it is preferable to simply hold it with upper and lower molds or the like so that the holding part of the first-step molded product can be moved while being kept horizontal. However, if it is moved while keeping it simply horizontal, the sandwiched portion is prevented from standing up during molding, and a portion where the desired three-dimensional edged metal part shape cannot be given to the first-step molded product is generated. Therefore, the first-step mold is formed between the flat clamping portion, and both ends or middle portions of the portion to which at least one bent line is provided from one or a plurality of the blank main body portions from the clamping portion. It is preferable that the intermediate part to be connected is provided to the blank [present invention (3)]. By applying the intermediate portion to a portion where the angle with respect to the horizontal continuously changes during molding, the both ends can be easily moved while the holding portion is kept horizontal.

  Furthermore, it is preferable to apply a method of making the contact point with the second-step mold a curved surface in the clamping portion. In the present invention (8), if the round hole provided in the first-step molded product and the cylindrical pin of the second-step mold have the same diameter, the end of the bent edge and the pin always kept the same distance. Since it rotates on the same plane as it is, the holding part can be easily held. The same applies to the embodiment of the present invention (9) in which the end of the blank or the first-step molded product has an arc shape.

  The mold mechanism that moves both ends of the bent edge of the first-step molded product is not limited to the mechanism that directly transmits the vertical movement of the slide of the press machine via a jig such as a punch. As a method of converting and using, a mechanism using an inclined surface represented by a cam mechanism, a link mechanism, and a mechanism using a lever may be used. In addition to the driving force of the press machine, a cylinder using electricity, air pressure, or hydraulic pressure may be used.

  In the three-dimensional molding process, if there is a part that deforms more easily than the three-dimensional molding of the first process is made three-dimensional from the bent line, that part is preferentially deformed. In order to prevent molding defects such as buckling of a bent line, it is effective to preferentially three-dimensionalize the bent edge of the first-step molded product, which is likely to be cracked or wrinkled. For this purpose, the bent line is formed into a plurality of curves around the bent edge portion to be preferentially three-dimensionalized, and at least one of the plurality of curves is connected to both sides of the part. It is preferable that the curvature be larger than that of the curved portion [present invention (4)]. When the curvature of the bent line is increased, the difference in line length between both sides with the bent line as a boundary increases with respect to the movement amount of both ends of the bent edge. For this reason, the bent edge is easily three-dimensionalized.

  On the other hand, when the three-dimensionalization of the bent edge is localized, the three-dimensionalization of the other bent edge may be insufficient. As a countermeasure, it is effective to configure the second-step mold so as to hold down the vertical wall portion, which is a portion adjacent to the bent edge to be locally three-dimensionalized while the bent edge is three-dimensionalized [ Invention (10)]. If you hold down the bend edge that you want to make into a three-dimensional shape, you will be forced to make the surroundings three-dimensional. Therefore, a wide range can be made three-dimensionally by using a second-step mold having a configuration in which a pressing jig is arranged at a required place.

  Further, the bent edge can be formed into a desired shape by correcting the shape of the bent edge during the three-dimensionalization of the bent edge by the second process die or after the three-dimensionalization [the present invention (12 ]]. The correction method may be any method as long as it can correct the shape, such as foam molding, coining, ironing, and re-molding by re-striking. More preferably, the bent edge portion may be reshaped by re-striking using a cam mechanism. For processing such as foam molding, coining, ironing, and restructuring, a pair of male and female jigs for processing a molded product, or a jig for fixing a molded product is required. However, since the shape of the periphery of the bent edge is easily disturbed when three-dimensionalizing the bent edge, the shape of the jig and the finished product do not match until the three-dimensional bending edge is completed, or the jig is a molded product. Installation may be difficult due to interference. Therefore, if the jig is moved using the cam mechanism, the jig can be retracted to a position where it does not interfere with the molded product except when correcting the shape of the bent edge. In addition, if a wrist-like jig is used, it is possible to correct locally bent edges and wrinkles.

  If the bent line and the bent edge of the first process molded product or the distance between the bent lines are not equal, in the second process mold, it will be bent with the above starting point as the apex along with the three-dimensional bending edge. The shape line tries to be three-dimensional in a bow shape when seen from the horizontal plane. At this time, if the bent line is pressed, the deformation of the first-step molded product is dispersed to other positions, so that the bent line can be prevented from being three-dimensional in a bow shape [present invention (11)]. . The pressing position is preferably only around the apex of the bow, and the pressing method may be any method such as placing a metal plate near the folded line. Further, if the three-dimensional shape of the bent line is excessively advanced, the bent line may be buckled in the vicinity of the starting point, which also has an effect of preventing buckling. Furthermore, since the buckling can be prevented, the first-step molded product portions on both ends of the bent edge can be moved more smoothly, and the bent edge can be more effectively three-dimensionalized.

  FIG. 1 is a schematic diagram showing an embodiment (1) of the present invention. In this example, a structure of a first-step mold for manufacturing a member having a V-shaped cross section by giving a mountain fold line (mountain fold line) 110 to the blank 10 is shown. This first-step mold has a die 1 and a punch 2 having a mold cross-sectional shape corresponding to the V-shaped cross section of the product. Reference numeral 15 denotes a bent edge, and 16 denotes an end of the bent edge. SOA and COA are observation sites for the occurrence of wrinkles and observation sites for occurrence of cracks in the product manufactured from the blank 10 (the same applies hereinafter).

  FIG. 2 is a schematic view showing an embodiment (2) of the present invention. In this example, by adding a mountain fold line 111 and a valley fold line (valley fold line) 120 to the blank 10 in the embodiment example (1), the intermediate part 6 and the sandwiching part 5 (the bent edge in FIG. 1) A structure of a first-step mold having a configuration in which (corresponding to the end 16) is given is shown. In addition, the same code | symbol is attached | subjected to the part same as an above-mentioned figure, or an equivalent part, and description is abbreviate | omitted.

FIG. 3 is a schematic view showing an embodiment (3) of the present invention. In this example, in order to manufacture a member having an M-shaped cross section, the intermediate portion 6 and the sandwiching portion 5 are provided by adding the mountain fold lines 111 and 112 and the valley fold lines 121 and 122 in the embodiment example (1). The structure of the 1st process metal mold | die made into the structure is shown. In addition, the same code | symbol is attached | subjected to the part same as an above-mentioned figure, or an equivalent part, and description is abbreviate | omitted.
FIG. 4 is a schematic view showing an embodiment (4) of the present invention. In this example, in the embodiment example (3), instead of the mountain fold line 111 and the valley fold line 121, the first process when the mountain fold line 113 and the valley fold line 123 each have a portion 50 having a larger curvature than the other part is used. The structure of the mold is shown. In addition, the same code | symbol is attached | subjected to the part same as an above-mentioned figure, or an equivalent part, and description is abbreviate | omitted.

  FIG. 5 is a schematic view showing an embodiment (5) of the present invention. In this example, the structure of the second step mold is shown. A bent slider edge 16 of the first-step molded product 11 is held by fixed blocks (lower and upper) 21 and 22, and a cam slider 24 and a cam driver 25 are provided as a mechanism for pressing them. The edge 16 of the bent edge is pushed by the contact surface of the fixed block (upper) 22 and the distance from the opposite end is narrowed.

  FIG. 6 is a schematic view showing an embodiment (6) of the present invention. This example shows a structure of a second-step mold in which a cylindrical pilot pin 23 is added as a holding mechanism for the first-step molded product 11 in the embodiment example (5). The first molded product 11 is provided with a round hole 30 for passing the pilot pin 23 from the blank stage. In addition, the same code | symbol is attached | subjected to the part same as an above-mentioned figure, or an equivalent part, and description is abbreviate | omitted.

  FIG. 7 is a schematic view showing an embodiment (7) of the present invention. In this example, in the embodiment example (5), as the holding mechanism of the first-step molded product 11, both ends of the bent edge are convex arcs and the contact surface of the fixed block (upper) 22 is concave arcs. Shows the structure of the second-step mold when the arc-shaped contact portion 31 is formed. In addition, the same code | symbol is attached | subjected to the same part as the previous figure, or an equivalent part, and description is abbreviate | omitted.

FIG. 8 is a schematic view showing an embodiment (8) of the present invention. In this example, the case where the second-step mold includes a pressing jig 40 that presses the bent edge that is locally three-dimensionalized at the rising edge 41 of the bent edge is shown. In addition, the same code | symbol is attached | subjected to the part same as an above-mentioned figure, or an equivalent part, and description is abbreviate | omitted.
FIG. 9 is a schematic view showing an embodiment (9) of the present invention. In this example, a case is shown in which the second step mold includes a pressing block 42 that presses the arcuate rise 43 of the mountain fold line 110 that is three-dimensionally shaped like a bow. In addition, the same code | symbol is attached | subjected to the part same as an above-mentioned figure, or an equivalent part, and description is abbreviate | omitted.

  FIG. 10 is a schematic view showing an embodiment (10) of the present invention. In this example, the second-step mold is a wrist-like tool (concave, convex) 60 that corrects the bent edge 15 that is locally three-dimensionalized after the second step or in the middle of the molded product 12 to a desired shape. The case where 61 is provided is shown. In addition, the same code | symbol is attached | subjected to the part same as an above-mentioned figure, or an equivalent part, and description is abbreviate | omitted.

Using a blank cut out from a steel sheet having the mechanical properties shown in Table 1 as a raw material, a solid edged metal part was manufactured by the forming method shown in Table 2 (Table 2-1 to Table 2-2), and the resulting part was broken. The presence or absence of wrinkles was determined.
Further, the degree of coincidence with the target shape was visually observed, and Example No. If the degree of coincidence with the target shape is equivalent to that of 5, the shape evaluation was evaluated as ◎.

Here, in the example of the present invention, the fold angle of the mountain fold line and the valley fold line was 90 degrees. Comparative Example No. In 1-4, the parts to be manufactured were the same as those in the embodiments (1) to (4) of the present invention. The presence / absence of cracking was determined by visually observing the observation site COA in FIGS. 1 to 4, and the presence / absence of wrinkling was determined by visual observation of the observation site SOA. The results are shown in Table 2.
According to Table 2, when manufacturing a metal part with a three-dimensional edge by three-dimensionally forming the bent edge of a blank made of a high-strength steel plate, conventional press forming has caused wrinkles, but in the present invention, wrinkles and wrinkles have been generated. The desired part could be manufactured without generating it.

  Furthermore, by using the embodiment examples (8) to (9) in combination, it was possible to manufacture a solid-edged metal part having a better match with the target shape (shape evaluation is ◎).

DESCRIPTION OF SYMBOLS 1 Die 2 Punch 5 Clamping part 6 Intermediate part 10 Blank 11 1st process molded product 12 Molded product 15 after the 2nd process or in the middle 15 Bend edge 16 Bend edge end 20 Holder 21 Fixed block (bottom)
22 Fixed block (top)
23 Pilot pin 24 Cam slider 25 Cam driver 30 Round hole 31 Arc-shaped contact portion 43 Arc-shaped rising portion 40 Holding jig 41 Bending edge rising portion 42 Holding block 43 Arc-shaped rising portion 50 A portion having a larger curvature than other portions 60 Wrist-like tool (concave type)
61 Wrist-like tool (convex)
110, 111, 112, 113 Mountain line 120, 121, 122, 123 Valley line

Claims (12)

  A blank having a curved bent edge with both ends cut out from a metal plate is used as a material, and the bent edge or a blank part adjacent to the bent edge is formed in a three-dimensional shape to produce a metal part with a three-dimensional edge. A metal mold for manufacturing a metal part with a three-dimensional edge used in the case, wherein a bent line is applied to the bent edge to give a bent line of either a mountain or a valley along the bent edge Next to the first-step mold used in the process, and then moving the both ends of the bent edge so that the distance between the ends is narrowed or widened, the bent edge or further the bent from the bent line. A metal mold for manufacturing a metal part with a three-dimensional edge, comprising: a second-step metal mold used in a three-dimensional molding process for three-dimensionalizing a blank portion adjacent to an edge part.   2. The mold for manufacturing a metal part with a three-dimensional edge according to claim 1, wherein the bent line provided using the first-step mold is a bent line having a bending radius of 0.5 mm to 30 mm.   The first-step mold is connected to both ends or a middle portion of a flat clamping portion and a portion to which at least one bent line is provided from one or a plurality of blank body portions from the clamping portion. The metal mold for manufacturing a metal part with a three-dimensional edge according to claim 1 or 2, wherein an intermediate part is applied to the blank.   The bent line is a plurality of curves, and a part of at least one of the plurality of curves has a larger curvature than a curved part connected to both sides of the part. 3. A mold for manufacturing a metal part with a solid edge according to any one of 3.   The said 2nd process metal mold | die was comprised by the structure which moved so that the space | interval of the both ends of the said bending edge part may be narrowed or expanded with respect to the molded article which passed through the said broken line provision process. The metal mold | die for manufacture of the metal component with a solid edge as described in any one of these.   The metal mold for manufacturing a metal part with a three-dimensional edge according to any one of claims 1 to 5, wherein the second process mold is configured to hold down the clamping portion.   The said 2nd process metal mold | die was set as the structure which moves the both sides or the edge of one side of the said bending edge part with respect to the molded article which passed through the said broken line provision process, The any one of Claims 1-6 characterized by the above-mentioned. Mold for manufacturing metal parts with three-dimensional edges described in 1.   The metal mold for manufacturing a metal part with a three-dimensional edge according to claim 7, wherein the second process mold is configured to move both ends of the bent edge using a cylindrical pin.   The solid metal with a three-dimensional edge according to claim 7, wherein the second step metal mold is configured to push an arc-shaped end portion provided in the blank or a molded product that has undergone the broken line applying step. Mold for manufacturing parts.   The said 2nd process metal mold | die was set as the structure which hold | suppresses the vertical wall part which is a site | part adjacent to the said bending | flexion edge part to make into a three-dimensional object, The solid edge with any one of Claim 1-9 characterized by the above-mentioned. Mold for manufacturing metal parts.   The metal mold for manufacturing a metal part with a solid edge according to any one of claims 1 to 10, wherein the second process mold is configured to suppress the three-dimensionalization of the bent line.   The said 2nd process metal mold | die was set as the structure which correct | amends the shape of the bending edge part in the middle of the said three-dimensionalization, or after the said three-dimensionalization. A mold for manufacturing the metal part with the three-dimensional edge described.

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