JP2017189785A - Punching method and punching device of ribbon laminate material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a punching method of accurately punching in a target shape even when a plurality of ribbon materials are laminated without bonding.SOLUTION: A material W0 is punched by a punch 2a which includes an inclined part 6, and 7a, 7b formed on a part of it. Shape parts 5a, 5b are portions punched by the parts 7a, 7b. A shape part 4 is a portion punched by the part 6. The shape part 4 is punched by proceeding cutting along an outline while the part 6 contacts with all layers of the material W0. In a next process, the shape parts 5a, 5b are punched and cut off from the shape part 4 by punches 2b, 2b.SELECTED DRAWING: Figure 1

Description

  TECHNICAL FIELD The present invention relates to a method and apparatus for punching a thin strip laminated material in which a material in which a plurality of thin strips is laminated is simultaneously punched into the same shape.

The punching device is shown in FIG.
One plate material 51 is pressed against the upper surface of the die 52 by a stripper 53 and set. A stripper hole 55 is formed in the stripper 53, and a die hole 54 is formed in the die 52. In the process in which the punch 56 is pushed toward the die hole 54, as shown in FIG. 27, the die blade 62 of the die 52 contacts the back surface of the single plate material 51, and the punch blade 61 of the punch 56 is the single plate material 51. In contact with the surface. When the punch 56 is pushed toward the die hole 54, a crack 63 is generated in the plate material 51 by the punch blade 61, a crack 64 is generated in the plate material 51 by the die blade 62, and the crack 63 and the crack 64 are a single plate material. The plate material 51 is cut by progressing inside 51 and joining at a junction 65, and is punched as shown in FIG.

JP2004-154913 JP2012-254495

  One of the highly efficient methods for producing products with laminated metal punching materials such as motor iron cores is to reduce the number of stacking steps after punching by stacking multiple metal sheets at the same time. Is mentioned.

  However, when a conventional punching device is used for punching a thin strip laminated material obtained by laminating a plurality of thin strips in place of a single plate 51, cracks are generated in the intermediate layer of the laminated structure at the time of punching. However, it cannot be punched into the desired shape. The cause is as follows.

FIG. 29 shows a cross-sectional view when a material obtained by laminating a plurality of ribbons is punched by a conventional punching apparatus.
In FIG. 29, the punch blade 61 and the die blade 62 are in contact with the ribbon laminated material 66 obtained by laminating a plurality of ribbons from the front and back, and cracks 63 and cracks 64 are generated on the front and back, respectively. The progress of the crack 63 and the crack 64 is limited to about one thin ribbon, and the intermediate layer 67 of the thin strip laminated material 66 does not come into contact with the punch blade 61 and the die blade 62 but is torn. In the torn material of the intermediate layer 67, burrs or the like are generated on the cut end face due to the occurrence of cracks, and the target shape cannot be satisfied.

  An object of the present invention is to provide a punching method capable of accurately punching a target shape even when a plurality of thin ribbon materials are laminated without bonding.

  In the method of punching a ribbon laminate of the present invention, a ribbon laminate obtained by laminating a plurality of ribbons without bonding them is provided with at least two or more slopes and perpendicular to the punching direction. Using a first punch having a convex or concave shape as viewed from the direction, the first step of punching into a shape that combines a punched shape portion of a target shape and a discarded shape portion different from the punched shape portion, Using the second punch having a concave shape when viewed from a direction perpendicular to the punching direction, the boundary between the punched shape portion and the discarded shape portion is provided with at least two or more slopes with the second die. The second step of cutting off the shape portion is performed.

  In addition, the ribbon laminating material punching device of the present invention includes a first die having a die hole corresponding to a shape obtained by combining a punching shape portion having a target shape and a discarding shape portion different from the punching shape portion, A first punch having a tip shape punched into a shape in which at least two or more inclinations are given to the surface and the shape viewed from the direction perpendicular to the punching direction is convex or concave and the punched shape portion and the discard shape portion are combined; A second die having a die hole corresponding to a shape that cuts off the discarded shape portion from the punched shape portion, and at least two or more inclinations on the surface, and the shape viewed from a direction perpendicular to the punching direction is concave and the discarded A second punch having a tip shape for cutting off the shape portion is provided.

  According to the present invention, in the first step, the laminated ribbon material is formed using a die and a first punch having an inclined surface, and a shape obtained by combining the punched shape portion of the target shape and the discarded shape portion. Therefore, an intermediate layer that does not come in contact with either the first punch or the die is partially generated in the laminated ribbon material, but the first punch first contacts with the intermediate layer in this way. By setting the position to be a layer to be a discarded shape portion, a crack in which the material is not properly punched is generated in a part of the discarded shape portion. No cracks occur in the punched shape part of the target shape.

  Since the surface of the first punch is inclined, in the first step, as the first punch is pushed toward the die, gradually from the upper layer of the ribbon laminated material on which the first punch is laminated. The laminated ribbon material is punched out in contact with the lower layer.

In the second step, the discarded shape portion can be cut out using the second punch, and only the punched shape portion in which no crack is generated can be punched out.
According to this method, in the production of a product obtained by laminating a punching material of a metal material such as a motor core, the number of laminating steps after punching can be reduced and production can be performed with high efficiency.

Embodiment 1 (a) A sectional view of a first step of a punching apparatus using a punch, and (b) a sectional view of a second step. (A) Perspective view of thin ribbon laminate, (b) perspective view of shape W1 upon completion of first step, and (c) perspective view of shape W2 upon completion of second step. A perspective view of the first punch 2a (A) Front view and (b) Side view and (c) Bottom view of the first punch 2a The perspective view of the 1st process which shows the detailed shape of the 1st die | dye 1a. Explanatory drawing of (a) comparative example and (b) Example of inclination pattern of 1st punch 2a Explanatory drawing when punching the material laminated with the first punch 2a of the comparative example and (b) Explanatory drawing when punching the material laminated with the first punch 2a of the embodiment Explanatory drawing when the first punch 2a starts to contact the ribbon laminated material W0 (A) Front view of second portions 7a, 7b of first punch 2a and (b) Plan view of discarded shape portions 5a, 5b in shape W1 at the completion of the first step. The top view of the 1st process explaining the relationship between the inclination direction of the 1st punch 2a, and cutting timing Perspective view of second punch 2b and second die 1b used in the second step The top view which shows the discard shape parts 5a and 5b cut off in the 2nd process (A) (b) Explanatory drawing at the time of performing a 2nd process using the 2nd punch 2b which provided one inclination. Explanatory drawing in the case of performing a 2nd process using the 2nd punch 2b which provided the inclination to the concave shape. (A) a perspective view of the ribbon laminated material in the second embodiment, (b) a perspective view of the shape W1 when the first step is completed, and (c) a perspective view of the shape W2 when the second step is completed. A perspective view of the first punch 2a (A) Front view and (b) Side view and (c) Bottom view of the first punch 2a A perspective view of the first punch 2a and the first die 1a The top view of the 1st process explaining the relationship between the inclination direction of the 1st punch 2a, and cutting timing Perspective view of second punch 2b and second die 1b used in the second step The perspective view of the 1st punch 2a in the case of making the planar shape of the discard shape parts 5a and 5b into a triangle in Embodiment 1 The perspective view of the 1st punch 2a in the case of making the planar shape of the discard shape parts 5a and 5b into a triangle in Embodiment 2 (A) Front view, (b) Side view, and (c) Bottom view of convex first punch 2a in the first embodiment. (A) Front view, (b) Side view, and (c) Bottom view of convex first punch 2a in the second embodiment The perspective view at the time of making 2nd punch into convex shape in each embodiment Cross-sectional view of a conventional punching device Enlarged cross-sectional view of the state of punching a plate Cross-sectional view of punched plate Enlarged cross-sectional view of a thin strip laminated material obtained by laminating multiple thin strips using a conventional punching device

Hereinafter, the method for punching a strip laminated material of the present invention will be described based on specific embodiments.
(Embodiment 1)
1 (a) and 1 (b) show a punching apparatus used for carrying out the method for punching a thin ribbon laminate of the present invention.

  A thin strip laminated material W0 shown in FIG. 2A, in which a plurality of thin strips are laminated without bonding, is similar to the conventional punching device shown in FIG. 26 by the stripper 3a and the upper surface of the first die 1a. Is pressed. In addition to the first punch 2a used as a set with the first die 1a, this punching apparatus includes a second die 1b, second punches 2b and 2b, and a stripper described later, as shown in FIG. 1B. 3b.

  Assuming that the shape W2 of the target product is a quadrilateral planar shape as shown in FIG. 2 (c), first, in the first step, the ribbon laminated material W0 is used as the first die 1a and the first punch 2a. Is punched into the shape W1 shown in FIG. This shape W1 is formed by forming discard shape portions 5a and 5b different from the punch shape portion 4 on the outer periphery of the punch shape portion 4 corresponding to a quadrangle of the shape of the product.

  The detailed shape of the first punch 2a is shown in FIGS. 3 and 4A, 4B, and 4C. The detailed shape of the first die 1a is shown in FIG. The first die 1a has a first hole 8a corresponding to the punched shape portion 4 and second holes 8b and 8b corresponding to the discarded shape portions 5a and 5b.

  The first punch 2a is provided with two inclinations θ1 and θ2 on the surface of the first portion 6 that punches the punching shape portion 4, and is formed in a concave shape when viewed from a direction perpendicular to the punching direction. Further, on both sides of the tip of the first portion 6 of the first punch 2a, second portions 7a and 7b for punching out the discarded portions 5a and 5b are formed. In the first step using the first punch 2a, when the first punch 2a is pushed toward the die hole 8 of the first die 1a, the second portions 7a and 7b of the first punch 2a are formed on the first punch 2a. In order to contact the strip laminated material W0 prior to the first portion 6, the second portions 7a and 7b of the first punch 2a and the second holes 8b and 8b of the first die 1a Punching proceeds. Next, punching of the punched shape portion 4 proceeds by the first portion 6 of the first punch 2a and the second hole 8a of the first die 1a.

  In a state in which the second portions 7a and 7b of the first punch 2a are in contact with the vicinity of the upper surface of the ribbon laminated material W0 and started to be pushed into the first die 1a, a die blade or a first Since there is an intermediate layer of the ribbon laminated material W0 that is not in contact with any of the punches 2a, cracks occur in the intermediate layer of the ribbon laminated material W0 at the ends of the discarded shape portions 5a and 5b.

  Since the second portion 7a, 7b of the first punch 2a is also formed with the same inclination slope that decreases toward the first portion 6, when the first punch 2a is further pushed toward the first die 1a, The ribbon-shaped laminated material W0 of the discard shape portions 5a and 5b is in contact with the first portion 6 of the first punch 2a from the upper layer through the intermediate layer toward the lower layer, and the punch shape portion 4 and the discard shape portions 5a and 5b. Cutting proceeds gradually to the boundary.

  Then, when the first punch 2a is further pushed toward the first die 1a, the first portion 6 to which the first punch 2a is inclined bites into the center from the end of the ribbon laminated material W0, The outline of the punched shape portion 4 is gradually cut.

  Here, a description will be given of a point where a plurality of thin ribbons of the thin ribbon laminate material W0 are laminated without bonding, the inclination of the first portion 6 of the first punch 2a, and the discarded shape portions 5a and 5b. The thin ribbon laminate W0 has a thickness of 0.25 mm, for example, by laminating 10 thin ribbons of 25 μm amorphous metal.

The inclination of the first portion 6 of the first punch 2a is given in order to prevent cracking due to tearing that occurs in the intermediate layer of the ribbon laminated material W0 during punching.
FIG. 6B shows an inclination imparting pattern to the first punch 2a. FIG. 6A is a comparative example.

The comparative example in FIG. 6A shows a first punch 2a provided with one inclination θ1.
FIG. 6B shows the first punch 2a of the embodiment in which two inclinations θ1 are provided so that the tip of the punch has a concave shape.

  Note that even when the number of slopes 6 is 2 or more (eg, 4 slopes, 6 ...), the same idea as in the case of 2 slopes can be applied. Let us explain the case of.

  FIG. 7A shows a state in which the ribbon laminated material W0 is punched with the first punch 2a of the comparative example. Although the ribbon laminated material W0 laminated without bonding is sandwiched between the first die 1a and the stripper 3a, it is slightly pushed away in the direction of arrow F1 by the inclination θ1 of the first punch 2a, and the position of the material of each layer Is displaced during punching, resulting in a difference in punching shape for each layer. Specifically, since the layer pushed away during punching moves slightly, the part punched at the timing after movement shifts by the amount moved relative to the original punching shape, and the shape is reduced from the original punching shape It becomes. Such a difference can be tolerated if the shape accuracy required for the laminated product is low, but not acceptable if the shape accuracy is extremely high. Therefore, the first punch 2a of the comparative example shown in FIG. 6A is not used.

  FIG. 7B shows a state in which the ribbon laminated material W0 is punched with the first punch 2a of the embodiment. Without bonding, the ribbon laminated material W0 is sandwiched between the first die 1a and the stripper 3a. The first punch 2a is pushed in the directions of arrows F1 and F2 by the inclinations θ1 and θ2, but the two directions are opposite to each other, so that the action of pushing away the material by the inclinations θ1 and θ2 is canceled out, and the material positions of each layer are punched out. The possibility of shifting in is reduced. Therefore, the first punch 2a of the embodiment shown in FIG. 6B can be used.

  When the thin ribbon laminate material W0 is punched using the first punch 2a of the embodiment shown in FIG. 6B, the second portions 7a and 7b of the first punch 2a start to contact the thin ribbon laminate material W0. Is shown in FIG. At this time, the punching of the intermediate layer 9 of the thin laminate material W0 is proceeding without being in contact with the first punch 2a or the first die 1a, and is in the same state as in FIG. . The portions where the ribbon laminated material W0 and the second portions 7a, 7b of the first convex portion of the first punch 2a first contact are cracked in the same manner as in FIG. Can't meet. In view of this, a portion where cracks are generated is shown by hatching in FIG. The portions indicated by hatching are discarded as shape portions 5a and 5b. For example, the inclination of the second portions 7a and 7b is the same as the inclination θ1 of the second portion 7a. The inclination of the second portion 7b is the same as the inclination θ2. The inclination θ1 = θ2.

  FIG. 10 shows an example of the case where the discarded shape portions 5a and 5b are provided as shown in FIG. 9 with respect to the punching timing on the contour of the punched shape portion 4 when the inclinations θ1 and θ2 are given to the first punch 2a. Show. Here, FIG. 10 is a view of the punched shape of the thin ribbon laminate material W0 viewed from the punching direction.

  At this time, as the first punch 2a enters from the two start points P1 and P1 and the first punch 2a descends, the first punch 2a moves downward along the arrows A1 and A1 indicating the punching timing on the contour of the punching shape portion 4. Cutting by punching proceeds in sequence to the positions of the end points P2, P2 of the places. Arrows A2 and A2 indicate the direction of the inclined surface of the first punch 2a.

  When the sides 4a and 4b of the punched shape portion 4 and the arrows A2 and A2 indicating the inclined surfaces of the first punch 2a and the sides 4a and 4b of the arrows A1 and A1 are perpendicular, the sides of the punched shape portion 4 In the portions 4a and 4b, the ribbon laminated material W0 is simultaneously punched. In this case, since the cutting timing is not shifted, the intermediate layer is not in contact with either the punch or the die as in FIG. 29, and the punching shape is cracked due to the tearing of the intermediate layer, which is not preferable. However, in other words, it can be seen that the first punch 2a shown in FIG. 3 is effective when the punched shape portion 4 and the arrows A2 and A2 are not perpendicular. The shape of the first punch 2a effective when the punched shape portion 4 and the arrows A2 and A2 indicating the punch inclined surfaces are perpendicular to each other will be described in the second embodiment.

  The punching process to a predetermined shape including the discarded shape portions 5a and 5b so far is the first step, and from here, the discarded shape portions 5a and 5b are cut off from the shape W1 when the first step is completed, A second process for completing the punching of the product W2 to the shape W2 will be described.

  The shape of the second punches 2b and 2b used in the second step is shown in FIG. Using the second punches 2b and 2b and the second die 1b, the discarded shape portions 5a and 5b are discarded from the punched shape portion 4 of the shape W1 when the first step is completed. 8c and 8c are die holes of the second die 1b.

  FIG. 12 shows a range B in which the discarded shape portions 5a and 5b are cut in the second step. The inclinations of the second punches 2b and 2b are set so that a part of the range B overlaps the boundary C between the punched shape portion 4 and the discarded shape portions 5a and 5b.

FIG. 13 (a) and FIG. 13 (b) show two types of second punches 2b and 2b of the comparative example to which one inclination is given as the inclination pattern of the second punches 2b and 2b.
FIG. 13 (a) shows a case where two second punches 2b and 2b, each having a single inclination with respect to the two discarded shape portions 5a and 5b, are used and the inclination directions of the two punches are the same. FIG. 13 (b) shows the case where the two second punches 2b, 2b having one inclination are reversed.

  However, in the case of the comparative example of FIG. 13 (a), the direction of the arrow F2 indicating the direction in which the strip laminated material is pushed away during punching due to the inclination of the second punches 2b, 2b is the two second punches 2b, 2b. The positions of the materials in each layer are shifted in the direction of the arrow F2 during punching, so that a punching shape difference occurs for each layer. Specifically, since the layer pushed away during punching moves slightly, the part punched at the timing after movement shifts by the amount moved relative to the original punching shape, and the shape is reduced from the original punching shape It becomes.

  In the case of the comparative example of FIG. 13B, the directions of the arrows F2 and F3 are opposite to each other by the two second punches 2b and 2b, and as shown by the arrow F4 by the action of the force that pushes away the stacked materials. By shifting so as to rotate, there is a difference in the punching shape for each layer. Specifically, since the layer pushed away during punching rotates slightly, the part punched at the timing after movement shifts by the amount rotated relative to the original punching shape, and the shape is inclined from the original punching shape It becomes. Therefore, it is not recommended to use the second punches 2b and 2b provided with one inclination as shown in FIGS. 13A and 13B in the second step.

FIG. 14 shows the case of the second punches 2b and 2b of the embodiment.
Since the second punches 2b and 2b of this embodiment are provided with two inclinations so that the tips have a concave shape, each of the arrows F2 and F3 indicating the direction in which the thin ribbon laminate is pushed away during punching The direction is offset. Here, by setting so that cutting starts simultaneously from both ends of the boundary C between the punched shape portion 4 and the discarded shape portions 5a and 5b, and the cutting ends at the center of the boundary C, the position of the material of each layer is being punched The discarded shape portions 5a and 5b can be punched without slipping.

  By setting the punching direction of the punch in the first step and the punching direction in the second step to be the same direction, the directionality of the cross section in the product cross section, such as the direction of minute burrs that does not affect the product performance Can be aligned with the punched shape cross section in the first step and the punched shape cross section in the second step, and a product almost the same as a product obtained by punching one sheet of ribbon in only one step is obtained.

(Embodiment 2)
15A to 15C show the steps of the punching method according to the second embodiment.
A different part from Embodiment 1 is demonstrated.

  The shape of the punching shape portion 4 shown in FIG. 15C is the same as that shown in FIG. 2C, but the shape W1 punched in the first step is different from that of the first embodiment. The shapes of the first punch and the first die are also different from the first embodiment. The shapes of the second punch and the second die are the same as those in the first embodiment.

  In the first step shown in FIG. 2C, any of the discarded shape portions 5a and 5b is formed at the center between the sides 4a and 4b of the punched shape portion 4, but is shown in FIG. 15B. In the first step, the position of one discarded shape portion 5a approaches the side 4c adjacent to the side 4a of the punched shape portion 4, and the position of the other discarded shape portion 5b is adjacent to the side 4b of the stamped shape portion 4. It is formed close to the side 4d side.

  In order to punch like this, the shape of the first punch 2a used in the second embodiment is shown in FIGS. 16 and 17A, 17B, and 17C. The valley line 10 of the first punch 2a is not parallel to the sides 4a and 4b of the punched shape portion 4, but is inclined at an angle θ3. The shape of the first die 1a used in the first step is shown in FIG.

  In the case of the first punch 2a shown in FIG. 3, the sides 4a and 4b of the punched shape portion 4 and the arrow A2 indicating the inclined surface of the first punch 2a are perpendicular to each other as shown in FIG. The side 4a, 4b of the portion 4 is cracked, and burrs or the like are generated on the cut end face, so that the predetermined shape cannot be satisfied. Then, the direction of the inclination of the first punch 2a is set as shown in FIG. 17C so that the sides 4a and 4b of the punched shape portion 4 and the arrow A2 indicating the inclination of the first punch 2a are not perpendicular to each other. As shown in FIG. 18, the direction of the sides 4 a, 4 b of the punched shape 4 and the inclined surfaces 6 a, 6 b of the punched shape 4 when the punched shape of the ribbon laminated material W 0 is viewed from the punching direction is not perpendicular. The trough 10 of the punch 2a is punched Sides 4a parts 4, is inclined at an angle θ3 in not parallel to the 4b.

  Accordingly, as shown in FIG. 19, the cutting starts from the start points P1 and P2 of the discarded portions 5a and 5b, and from the start point P1 as the first punch 2a is pushed toward the first die 1a. Cutting gradually proceeds toward the sides 4c and 4d, and the cutting is performed to the end point P3 on the side 4c and the end point P4 on the side 4d. At the same time, the cutting progresses gradually from the start point P1 toward the side 4d and is cut to the end point P4 on the side 4d.

  Thus, even if the shape of the punched shape portion 4 is a quadrangle, by inclining the valley line 10 of the first punch 2a with respect to the discarded shape portions 5a and 5b, it can be cut without generating cracks, A good state in which no burrs or the like occur on the end face was realized.

In the second step, as shown in FIG. 20, the discarded shape portions 5a and 5b are cut off by the second punches 2b and 2b and the second die 1b having the same shape as the second step of the first embodiment.
(Embodiment 3)
In each of the embodiments described above, the planar shape of the discard shape portions 5a and 5b is a square, but the planar shape may be a triangle. FIG. 21 shows the first punch 2a of the first embodiment. FIG. 22 shows the first punch 2a of the second embodiment.

According to this, the front-end | tip part corresponding to the discard shape parts 5a and 5b of the 1st punch 2a can be comprised with a point.
(Embodiment 4)
In each of the above-described embodiments, the shape viewed from the direction perpendicular to the punching direction of the first punch 2a is a concave shape, but may be configured in a concave shape. FIGS. 23A, 23B, and 23C show the first punch 2a of the first embodiment. 24A, 24B and 24C show the first punch 2a of the second embodiment.

According to this, the positions of the discarded shape portions 5a and 5b are just moved in the middle of the sides 4c and 4d of the discarded shape portions 5a and 5b, and the others are the same as in the first and second embodiments.
(Embodiment 5)
In each of the embodiments described above, the case where the shape of the second punches 2b, 2b is concave when viewed from the direction perpendicular to the punching direction has been described. However, when the shape viewed from the direction perpendicular to the punching direction is convex But it can be done in the same way. The first punch 2a in this case is shown in FIG.

  The present invention contributes to an improvement in the productivity of products in which punched materials are laminated.

DESCRIPTION OF SYMBOLS 1a 1st die 1b 2nd die 2a 1st punch 2b 2nd punch 3a Stripper 3b Stripper 4 Punching shape part 5a, 5b Discarding shape part 6 1st part 7a, 7b 2nd part 8a 1st hole 8b 2nd hole 9 Middle Layer W0 Strip laminated material W1 Shape when the first process is completed W2 Shape of the target product

Claims (6)

A first punch having a convex or concave shape as viewed from a direction perpendicular to the punching direction, in which a plurality of thin ribbons are laminated without adhering, and the first die and at least two or more slopes are provided. The first step of punching into a shape that combines a punched shape portion of the target shape and a discarded shape portion different from the punched shape portion,
Using the second punch having a concave shape when viewed from a direction perpendicular to the punching direction, the boundary between the punched shape portion and the discarded shape portion is provided with at least two or more slopes with the second die. Implement the second step of cutting off the shape part,
A method for punching thin ribbon laminates. In the first step, two or more discarded shape portions are provided around a punched shape portion of a target shape,
The method for punching a laminated ribbon material according to claim 1. In both the first step and the second step, the first punch and the second punch are held in a state where a thin strip laminated material obtained by laminating a plurality of thin strips without bonding them is also pressed using a die and a stripper. It is characterized by being arranged only on one side of the front side or the back side of the ribbon laminate material,
3. A method for punching a laminated ribbon material according to claim 1 or 2. For the first punch, the one provided with the inclination in a direction not perpendicular to the linear shape indicating the punching shape in the first step,
The second punch is characterized by using the one provided with the inclination in a direction not perpendicular to the linear shape indicating the punching shape in the second step,
The method for punching a laminated ribbon material according to any one of claims 1 to 3. In the second step, cutting is started simultaneously from both ends of the boundary between the punched shape portion of the target shape and the discarded shape portion, and cutting is ended at the center of the boundary,
The method for punching a laminated ribbon material according to any one of claims 1 to 4. A first die having a die hole corresponding to a shape formed by combining a punched shape portion of a target shape and a discarded shape portion different from the punched shape portion;
A first punch having a tip shape punched into a shape in which at least two or more inclinations are given to the surface and the shape viewed from the direction perpendicular to the punching direction is convex or concave and the punched shape portion and the discard shape portion are combined;
A second die having a die hole corresponding to the shape of cutting off the discarded shape portion from the punched shape portion;
A tip-shaped second punch that has at least two or more inclinations on the surface and has a concave shape viewed from a direction perpendicular to the punching direction and cuts off the discarded shape portion;
Thin ribbon laminate punching equipment.

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