Punching device, method for manufacturing iron core, method for manufacturing rotating electrical machine, and rotating electrical machine

Abstract

In a punching device for punching a material (600) to manufacture a product (100), in punching of a narrow portion (101) formed with a width (W1) smaller than a plate thickness (T1) of the material (600) in a width direction (XX) of the product (100), punching is performed by suppressing movement of the narrow portion (101) in all parallel directions including a planar direction, a transverse direction (X), and a longitudinal direction (Z), and strength of the narrow portion (101) is ensured.

Description

Technical Field

[0001] The present disclosure relates to a punching device, a method for manufacturing an iron core, a method for manufacturing a rotating electric machine, and the rotating electric machine. Background Art

[0002] In conventional stamping processes, for example, the mold consists solely of a punch and die for blanking. Material blanked with a circular punch is returned directly to the original hole, and the adjacent hole is then blanked and discarded. The returned material is then dropped and discarded, thereby forming two adjacent holes with a width less than the plate thickness in the remaining material, thereby performing narrow blanking (see, for example, Patent Document 1). Alternatively, for example, a narrow portion of a product is crushed to be thinner than the plate thickness outside of that portion, resulting in a product shape where the apparent narrow dimension is larger than the plate thickness (see, for example, Patent Document 2).

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Laid-Open No. 2002-143942

[0006] Patent Document 2: Japanese Patent Application Laid-Open No. 2016-7136 Summary of the Invention

[0007] Problems to be solved by the invention

[0008] Previous stamping devices did not have a structure to suppress the warping of the product. Generally, with such a mold structure, the collapsed edge of the punched hole becomes larger. After two punchings, the thickness of the narrow width part becomes significantly thinner than the original thickness, and the narrow width part tilts and twists. As a result, there are problems such as reduced strength of the narrow width part and deterioration of the dimensional accuracy of the product.

[0009] The present disclosure discloses a technology for solving the above-mentioned problems, and an object of the present disclosure is to provide a press device, a method for manufacturing an iron core, a method for manufacturing a rotating electric machine, and a rotating electric machine, which can ensure the strength of a narrow width portion.

[0010] Means for solving problems

[0011] The punching device disclosed herein punches out a material to produce a product. When punching out a narrow portion of the product having a width smaller than the thickness of the material, the punching device performs punching while suppressing movement of the narrow portion in a planar direction.

[0012] Furthermore, the iron core manufacturing method of the present disclosure uses the above-described press apparatus to manufacture the product obtained by punching out the material as an iron core of a rotating electrical machine.

[0013] Furthermore, the method for manufacturing a rotating electric machine disclosed herein manufactures a rotating electric machine using the iron core manufactured by the method for manufacturing an iron core described above.

[0014] In addition, the rotating electric machine disclosed in the present invention includes the following rotating electric machine core: in a narrow width portion formed on the rotating electric machine core punched out from a material by a stamping device and formed with a width smaller than the plate thickness of the material, when a surface formed by cutting one side of the narrow width portion in the width direction is set as a first surface, and a surface formed by cutting the other side of the narrow width portion in the width direction is set as a second surface, a first burr protruding from the one end surface in the plate thickness direction of the material is formed on one end side of the first surface in the plate thickness direction, and a second burr protruding from the other end surface in the plate thickness direction of the material is formed on the other end side of the second surface in the plate thickness direction, the first burr has a mark of being flattened, and the height of the first burr protruding from the one end surface in the plate thickness direction of the material is smaller than the height of the second burr protruding from the other end surface in the plate thickness direction of the material.

[0015] Effects of the Invention

[0016] According to the press device, the method for manufacturing an iron core, the method for manufacturing a rotating electrical machine, and the rotating electrical machine disclosed herein, the strength of the narrow width portion can be ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a plan view showing the structure of a rotating electrical machine using the iron core manufactured by the press apparatus according to the first embodiment.

[0018] Figure 2 Yes Figure 1 A cross-sectional view of the structure of a rotating electrical machine is shown.

[0019] Figure 3 This is a plan view showing the structure of a product manufactured by the press device according to the first embodiment.

[0020] Figure 4 Yes Figure 3 A cross-sectional view of the structure of the product shown.

[0021] Figure 5 It is a top view showing the manufacturing process of the product of embodiment 1.

[0022] Figure 6 It is a cross-sectional view showing the manufacturing process of the product of embodiment 1.

[0023] Figure 7 It is a top view showing the manufacturing process of the product of embodiment 1.

[0024] Figure 8It is a cross-sectional view showing the manufacturing process of the product of embodiment 1.

[0025] Figure 9 It is a top view showing the manufacturing process of the product of embodiment 1.

[0026] Figure 10 It is a cross-sectional view showing the manufacturing process of the product of embodiment 1.

[0027] Figure 11 It is a top view showing the manufacturing process of the product of embodiment 1.

[0028] Figure 12 It is a cross-sectional view showing the manufacturing process of the product of embodiment 1.

[0029] Figure 13 This is an enlarged cross-sectional view showing a part of the structure of the product according to the first embodiment.

[0030] Figure 14 It is a partially enlarged cross-sectional view showing the manufacturing process of the product of embodiment 1.

[0031] Figure 15 It is a top view showing the manufacturing process of the product of embodiment 2.

[0032] Figure 16 It is a cross-sectional view showing the manufacturing process of the product of embodiment 2.

[0033] Figure 17 It is a top view showing the manufacturing process of the product of embodiment 2.

[0034] Figure 18 It is a cross-sectional view showing the manufacturing process of the product of embodiment 2.

[0035] Figure 19 It is a partially enlarged cross-sectional view showing the manufacturing process of the product of embodiment 2.

[0036] Figure 20 It is a partially enlarged cross-sectional view showing the manufacturing process of the product of embodiment 2.

[0037] Figure 21 This is an enlarged cross-sectional view showing a portion of the structure of the product of the second embodiment.

[0038] Figure 22 It is a top view showing the manufacturing process of the product of embodiment 3.

[0039] Figure 23 It is a cross-sectional view showing the manufacturing process of the product of embodiment 3.

[0040] Figure 24 It is a top view showing the manufacturing process of the product of embodiment 3.

[0041] Figure 25 It is a cross-sectional view showing the manufacturing process of the product of embodiment 3.

[0042] Figure 26 It is a partially enlarged cross-sectional view showing the manufacturing process of the product of embodiment 3.

[0043] Figure 27 This is an enlarged cross-sectional view showing a portion of the structure of the product of the third embodiment.

[0044] Figure 28 It is a top view showing the manufacturing process of the product of embodiment 4.

[0045] Figure 29 It is a cross-sectional view showing the manufacturing process of the product of embodiment 4.

[0046] Figure 30 It is a top view showing the manufacturing process of the product of embodiment 4.

[0047] Figure 31 It is a cross-sectional view showing the manufacturing process of the product of embodiment 4.

[0048] Figure 32 It is a top view showing the manufacturing process of the product of embodiment 4.

[0049] Figure 33 It is a cross-sectional view showing the manufacturing process of the product of embodiment 4.

[0050] Figure 34 It is a top view showing the manufacturing process of the product of embodiment 4.

[0051] Figure 35 It is a cross-sectional view showing the manufacturing process of the product of embodiment 4.

[0052] Figure 36 It is a top view showing the manufacturing process of the product of embodiment 4.

[0053] Figure 37 It is a cross-sectional view showing the manufacturing process of the product of embodiment 4.

[0054] Figure 38 It is a top view showing the manufacturing process of the product of embodiment 4.

[0055] Figure 39 It is a cross-sectional view showing the manufacturing process of the product of embodiment 4.

[0056] Figure 40 in Figure 40 A is a partially enlarged cross-sectional view showing a portion of the structure of a product of embodiment 4, Figure 40B is a partially enlarged cross-sectional view of a comparative example.

[0057] Figure 41 It is a top view showing the manufacturing process of the product of embodiment 5.

[0058] Figure 42 It is a cross-sectional view showing the manufacturing process of the product of embodiment 5.

[0059] Figure 43 It is a partially enlarged cross-sectional view showing the manufacturing process of the product of embodiment 5.

[0060] Figure 44 It is a top view showing the manufacturing process of the product of embodiment 5.

[0061] Figure 45 It is a cross-sectional view showing the manufacturing process of the product of embodiment 5.

[0062] Figure 46 in Figure 46 A is a partially enlarged cross-sectional view showing a portion of the structure of a product of embodiment 5, Figure 46 B is a partially enlarged cross-sectional view of a comparative example.

[0063] Figure 47 It is a top view showing the manufacturing process of the product of embodiment 6.

[0064] Figure 48 It is a cross-sectional view showing the manufacturing process of the product of embodiment 6.

[0065] Figure 49 It is a partially enlarged cross-sectional view showing the manufacturing process of the product of embodiment 6.

[0066] Figure 50 It is a top view showing the manufacturing process of the product of embodiment 6.

[0067] Figure 51 It is a cross-sectional view showing the manufacturing process of the product of embodiment 6.

[0068] Figure 52 It is a partially enlarged cross-sectional view showing the manufacturing process of the product of embodiment 6.

[0069] Figure 53 It is a top view showing the manufacturing process of the product of embodiment 6.

[0070] Figure 54 It is a cross-sectional view showing the manufacturing process of the product of embodiment 6.

[0071] Figure 55 It is a top view showing the manufacturing process of the product of embodiment 6.

[0072] Figure 56 It is a cross-sectional view showing the manufacturing process of the product of embodiment 6.

[0073] Figure 57 This is an enlarged cross-sectional view showing a portion of the structure of the product of embodiment 6.

[0074] Figure 58 It is an overhead view showing the manufacturing process of the product of embodiment 7.

[0075] Figure 59 It is a cross-sectional view showing the manufacturing process of the product of embodiment 7.

[0076] Figure 60 It is a three-dimensional diagram showing the manufacturing process of the product of embodiment 7.

[0077] Figure 61 It is a three-dimensional diagram showing the manufacturing process of the product of embodiment 7.

[0078] Figure 62 It is an overhead view showing the manufacturing process of the product of embodiment 7.

[0079] Figure 63 It is a cross-sectional view showing the manufacturing process of the product of embodiment 7.

[0080] Figure 64 It is an overhead view showing the manufacturing process of the product of embodiment 7.

[0081] Figure 65 It is a cross-sectional view showing the manufacturing process of the product of embodiment 7.

[0082] Figure 66 It is an overhead view showing the manufacturing process of the product of embodiment 7.

[0083] Figure 67 It is a cross-sectional view showing the manufacturing process of the product of embodiment 7.

[0084] Figure 68 This is an enlarged cross-sectional view showing a portion of the structure of the product of embodiment 7.

[0085] Figure 69 It is a plan view showing the structure of a product manufactured by the press device of the eighth embodiment.

[0086] Figure 70 Yes Figure 69 A cross-sectional view of the structure of the product shown.

[0087] Figure 71 It is an overhead view showing the manufacturing process of the product of embodiment 8.

[0088] Figure 72It is a cross-sectional view showing the manufacturing process of the product of embodiment 8.

[0089] Figure 73 It is an overhead view showing the manufacturing process of the product of embodiment 8.

[0090] Figure 74 It is a cross-sectional view showing the manufacturing process of the product of embodiment 8.

[0091] Figure 75 It is an overhead view showing the manufacturing process of the product of embodiment 8.

[0092] Figure 76 It is a cross-sectional view showing the manufacturing process of the product of embodiment 8.

[0093] Figure 77 It is an overhead view showing the manufacturing process of the product of embodiment 8.

[0094] Figure 78 It is a cross-sectional view showing the manufacturing process of the product of embodiment 8.

[0095] Figure 79 It is an overhead view showing the manufacturing process of the product of embodiment 8.

[0096] Figure 80 It is a cross-sectional view showing the manufacturing process of the product of embodiment 8.

[0097] Figure 81 This is an enlarged cross-sectional view showing a portion of the structure of the product of embodiment 8.

[0098] Figure 82 in Figure 82 A is a plan view showing a method for manufacturing a product of a comparative example. Figure 82 B is a cross-sectional view showing a method for manufacturing a product of a comparative example. Figure 82 C is a plan view showing a method for manufacturing a product of a comparative example. Figure 82 D is a cross-sectional view showing a method for manufacturing a product of a comparative example. Figure 82 E is a plan view showing a method for manufacturing a product of a comparative example. Figure 82 F is a cross-sectional view showing a method for manufacturing a product of a comparative example. Figure 82 G is a top view showing a method for manufacturing a product of a comparative example. Figure 82 H is a cross-sectional view showing a method for manufacturing a product of a comparative example. Figure 82 1 is a plan view showing a method for manufacturing a product of a comparative example, Figure 82 J is a cross-sectional view showing a method for manufacturing a product of a comparative example.

[0099] Figure 83 It is an overhead view showing the manufacturing process of the product of embodiment 9.

[0100] Figure 84 It is a cross-sectional view showing the manufacturing process of the product of embodiment 9.

[0101] Figure 85 It is a cross-sectional view showing the manufacturing process of the product of embodiment 9.

[0102] Figure 86 It is a three-dimensional diagram showing the manufacturing process of the product of embodiment 9.

[0103] Figure 87 in Figure 87 A is a side view showing the structure of the punch of embodiment 9, Figure 87 B is a plan view showing the structure of the punch according to the ninth embodiment.

[0104] Figure 88 It is an overhead view showing the manufacturing process of the product of embodiment 9.

[0105] Figure 89 It is a cross-sectional view showing the manufacturing process of the product of embodiment 9.

[0106] Figure 90 It is a cross-sectional view showing the manufacturing process of the product of embodiment 9.

[0107] Figure 91 It is an overhead view showing the manufacturing process of the product of embodiment 9.

[0108] Figure 92 It is a cross-sectional view showing the manufacturing process of the product of embodiment 9.

[0109] Figure 93 It is a cross-sectional view showing the manufacturing process of the product of embodiment 9.

[0110] Figure 94 It is an overhead view showing the manufacturing process of the product of embodiment 9.

[0111] Figure 95 It is a cross-sectional view showing the manufacturing process of the product of embodiment 9.

[0112] Figure 96 It is a cross-sectional view showing the manufacturing process of the product of embodiment 9.

[0113] Figure 97 in Figure 97 A is an enlarged cross-sectional view showing a portion of the structure of a product of embodiment 9, Figure 97 B is an enlarged cross-sectional view showing another partial structure of the product of embodiment 9.

[0114] Figure 98It is a top view showing the manufacturing process of the product of embodiment 10.

[0115] Figure 99 It is a cross-sectional view showing the manufacturing process of the product of embodiment 10.

[0116] Figure 100 It is a top view showing the manufacturing process of the product of embodiment 10.

[0117] Figure 101 It is a cross-sectional view showing the manufacturing process of the product of embodiment 10.

[0118] Figure 102 It is a three-dimensional diagram showing other manufacturing processes of the product of embodiment 9.

[0119] Figure 103 in Figure 103 A means Figure 102 A side view of the structure of the die is shown. Figure 103 B means Figure 102 A top view of the structure of the die is shown. DETAILED DESCRIPTION

[0120] The following describes an embodiment of the punching device disclosed herein. The punching device shown in each of the following embodiments is a punching device for punching a material to produce a product, and in the punching of a narrow portion of the product formed with a width smaller than the plate thickness of the material, the movement of the narrow portion in the planar direction is suppressed and the punching is performed.

[0121] Moreover, specifically, the punching device shown in each embodiment has a punch, a support (backup), a stripper plate and a die, the punch and the support are arranged opposite each other with the material clamped therebetween, the stripper plate and the die are arranged opposite each other with the material clamped therebetween, and the punch, the support, the stripper plate and the die are arranged at a position that suppresses the narrow width portion from moving in the plane direction. Therefore, it is possible to consider the situation of having a variety of punches, support members, stripper plates and dies according to their respective uses. These are the same in the following embodiments, so their description is appropriately omitted.

[0122] Implementation method 1.

[0123] First, use Figure 1 and Figure 2 , an iron core of a rotating electric machine manufactured using the punching device of the present disclosure and a rotating electric machine manufactured from the iron core are described. Figure 1 It is a plan view showing the structure of a rotating electrical machine using the iron core manufactured by the press apparatus according to the first embodiment. Figure 2 Yes Figure 1 A cross-sectional view of the structure of a rotating electrical machine is shown.

[0124] In the figures, a rotating electrical machine 1 includes an annular outer frame 2; a stator core 30 formed of a plurality of stator core sheets 3 arranged annularly on the inner circumference of the outer frame 2; a rotor core 4 arranged on the inner circumference of the stator core 30 with gaps therebetween; and a shaft 5 secured to the center of the rotor core 4. The rotating electrical machine 1 rotates about the shaft 5, which is integral with the rotor core 4 and rotates relative to the annular stator core 30. Hereinafter, the direction parallel to the shaft 5 is referred to as the axial direction, the direction in which the rotor core 4 rotates is referred to as the circumferential direction, and the direction perpendicular to the axial direction is referred to as the radial direction.

[0125] The stator core sheet 3 includes a core back 6 shaped as a portion of a circular ring and teeth 7 protruding inwardly from the core back 6, and is fixed to the outer frame 2 via a fitting 8. Coils 9 formed by winding a conductive wire are arranged around the teeth 7. Rotor magnets 10 are embedded in the rotor core 4 along the circumferential direction. The rotor core 4 is formed by stacking a plurality of cores 40 in the axial direction. The core 40 forming the rotor core 4 has a flux barrier 11 provided on the outer circumference, connected to the magnet holes for inserting the rotor magnets 10. A bridge with a small radial width, or narrow portion 12, is provided on the outer circumference of the flux barrier 11, connecting to the outer circumferential surface of the rotor core 4. The provision of this narrow portion (bridge 12) prevents short-circuiting of magnetic flux between adjacent magnets of different poles.

[0126] The narrow portion 12 formed on the iron core 40 forming the rotor core 4 is formed with a width smaller than the thickness of the material used to manufacture the iron core 40. How to manufacture this narrow portion 12 with high precision while ensuring strength affects the quality of the rotating electrical machine 1. Therefore, in order to manufacture this narrow portion 12 with high precision while ensuring strength, the press machine disclosed herein is used.

[0127] Next, a method for manufacturing the iron core 40 as a product punched out using the punching device will be described. Figure 1 Although the shapes shown are different, they are the same in that they have a width slightly larger than the thickness of the plate of the material used to manufacture the core 40 . For the sake of convenience, the shapes are simplified for easier understanding.

[0128] First, in the following description, the portion identical to the previously described iron core 40 is represented as a product 100, and the portion identical to the previously described narrow width portion 12 of the iron core 40 is represented as a narrow width portion 101. Figure 3 and Figure 4 , the relationship between the material 600, the product 100, and the narrow width portion 101 will be described. Figure 3 This is a plan view showing the structure of a product manufactured by the press device according to the first embodiment. Figure 4 Yes Figure 3The sectional view of the structure of the AA line section of the product shown. In addition, for convenience, only Figure 4 1 and 2 show hatching of a portion corresponding to a cross section of the product 100 .

[0129] The product 100 is manufactured by punching out the material 600. The direction of the thickness of the material 600 is referred to as the thickness direction Y. The thickness direction Y is the same as the punching direction of the material 600. In addition, the upper surface side of the material 600 in the thickness direction Y is referred to as the upper side Y1, and the lower surface side is referred to as the lower side Y2. Moreover, the plane direction of the material 600 and the product 100 is the plane direction including the plane. Figure 3 All directions parallel to the paper plane of the horizontal X and vertical Z. Figure 4 In the cross section shown, the direction of the width W1 smaller than the thickness T1 of the material 600 of the narrow width portion 101 is described as the width direction XX. Therefore, the width direction XX is a part of the planar direction of the material 600.

[0130] The outermost cut surface of product 100 is referred to as outermost surface 102. Regarding the surfaces cut to form narrow portion 101, the cut surface on one side in width direction XX is referred to as first surface 111, and the cut surface on the other side in width direction XX is referred to as second surface 112. Furthermore, the opening for forming narrow portion 101 is referred to as hole 120. First surface 111 is a portion of outermost surface 102, and second surface 112 is a portion of hole 120.

[0131] In addition, the punching device disclosed in the present invention suppresses the movement of the narrow width portion 101 in the planar direction during the punching of the narrow width portion 101 and performs the punching. Specifically, the punching device disclosed in the present invention includes a punch, a support, a stripper plate, and a die. The punch and the support are arranged so as to be opposed to each other in the upper and lower directions of the plate thickness direction Y with the material 600 clamped thereon. In addition, the punch and the support are of the same shape on the plane. The stripper plate and the die are arranged so as to be opposed to each other in the upper and lower directions of the plate thickness direction Y with the material 600 clamped thereon. In addition, the stripper plate and the die are of the same shape on the plane. Moreover, the punch, the support, the stripper plate, and the die are arranged at a position that suppresses the movement of the narrow width portion 101 in the planar direction.

[0132] Then, based on Figures 5 to 14 , a method for manufacturing a product using the punching device of the embodiment 1 constructed as described above will be described. Figure 5 and Figure 6 As shown, the material 600 is punched out by the punch 200 to perform a punching return process for forming the outermost peripheral surface 102 of the product 100 . Figure 5 The figure shows a state where the material 600 is punched out along the outermost peripheral surface 102 of the product 100 and then subjected to return processing. Figure 6 yes Figure 5A cross-sectional view showing the blanking process at the AA line section.

[0133] like Figure 6 As shown, a punch 200 is positioned on the upper side Y1 of a material 600, and a support member 300 having the same planar shape as the punch 200 is positioned from the lower side Y2 of the material 600. While the punch 200 is sandwiching the material 600, the material 600 is punched out to form the outermost surface 102 of the product 100. This outermost surface 102 includes the first surface 111 of the narrow width portion 101. At this time, the support member 300 presses the material 600 toward the upper side Y1 against the punch 200 with a force that is at least 50% of the shear load of the material 600. The punch 200 and support member 300 are used to perform the punching process, while the portion of the material 600 that will become the product 100 is sandwiched between the punch 200 and support member 300. This prevents warping of the product 100 and the occurrence of edge collapse.

[0134] Furthermore, at this time, a stripper plate 400 is arranged around the punch 200 on the upper side Y1 of the material 600, and a die 500 having the same planar shape as the stripper plate 400 is arranged on the lower side Y2 of the stripper plate 400, opposite to the material 600. Therefore, the material 600 on the outer side of the product 100 is clamped and fixed by the stripper plate 400 and the die 500.

[0135] Furthermore, in this process, the outermost peripheral surface 102 having the first surface 111 of the narrow width portion 101 is formed. Therefore, the outermost peripheral surface 102 is in a fixed state by the punch 200 and the support member 300, the stripper plate 400 and the die 500, and the material 600 clamped by the stripper plate 400 and the die 500, so that the outermost peripheral surface 102, that is, the first surface 111 of the narrow width portion 101, is suppressed from moving in the planar direction.

[0136] and, Figure 5 The relationship between the material 600 and the product 100 when the process is completed is as follows. Figure 14 As shown, the support member 300 pushes the punched product 100 back so that the punched product 100 is embedded in the original material 600 by at least 20% of the plate thickness. Figure 5 In the blanking return process, the product 100 may not be fully returned to the same position as the material 600. Therefore, next, as Figure 7 and Figure 8 As shown, a punching process is performed to embed the product 100 in the material 600.

[0137] Figure 7 It is a top view showing the state after the product 100 is flattened into the material 600. Figure 8 yes Figure 7 The cross-sectional view of the AA line section represents the flattening process. Figure 8As shown in FIG, by using the stripper plate 401 having a flat surface in the plane direction and the die 501 to clamp the product 100, the product 100 is embedded back into the original position of the material 600. Figure 7 As shown, the product 100 is embedded back into the material 600 .

[0138] That is, after the punch 200 punches out at least a portion of the entire circumference of the outermost peripheral surface 102 of the product 100, the support member 300 is configured to embed the outermost peripheral surface 102 punched out by the punch 200 back into the material 600. After the support member 300 embeds the outermost peripheral surface 102 punched out by the punch 200 back into the material 600, the stripper plate 400 and the die 500 are configured to press the narrow width portion 101 on the inner side of the outermost peripheral surface 102 and the material 600 on the outer side of the outermost peripheral surface 102. In addition, the inner side of the outermost peripheral surface 102 refers to the side of the material 600 where the product 100 is formed, and the outer side of the outermost peripheral surface 102 refers to the side of the material 600 where the product 100 is not formed. This matter is the same in the following embodiments, and therefore its description is appropriately omitted.

[0139] Then, if Figure 9 and Figure 10 As shown, a hole machining step of forming the hole portion 120 is performed. Figure 9 It is a plan view showing a state after the hole portion 120 is formed. Figure 10 yes Figure 9 The cross-sectional view of the hole processing process of the hole portion 120 at the AA line cross section is shown. Figure 10 As shown, punch 201 is positioned on upper side Y1 of material 600. Punch 201 then punches material 600, forming hole 120 of product 100. Hole 120 includes second surface 112 of narrow portion 101. Hole scrap 601 released from hole 120 is ejected into die 502.

[0140] Furthermore, at this time, a stripper plate 402 is arranged around the punch 201 on the upper side Y1 of the material 600, and a die 502 having the same planar shape as the stripper plate 402 is arranged on the lower side Y2 opposite to the stripper plate 402 across the material 600. Therefore, the product 100 and the material 600 outside the product 100 are clamped and fixed by the stripper plate 402 and the die 502.

[0141] In this process, a hole portion 120 is formed on the second surface 112 of the narrow width portion 101. Thus, the hole portion 120 is formed by clamping the upper side Y1 and lower side Y2 surfaces of the narrow width portion 101, and then using the punch 201, the stripper plate 402, the die 502, and the material 600 clamped by the stripper plate 402 and the die 502 to fix the first surface 111 and the second surface 112 of the narrow width portion 101. Therefore, the narrow width portion 101 is formed while being prevented from moving in a planar direction. This prevents deformation and edge collapse of the narrow width portion 101.

[0142] That is, when the embedded outermost peripheral surface 102 is cut off in the plate thickness direction Y, and the stripper plate 402 and the die 502 press the narrow width portion 101 on the inner side of the outermost peripheral surface 102 and the material 600 on the outer side of the outermost peripheral surface 102, the punch 201 is configured to punch out the second surface 112 of the narrow width portion 101.

[0143] exist Figure 10 In the process, the hole portion 120 is punched out, and the product 100 having completed the formation of the narrow width portion 101 becomes embedded and pressed into the material 600. Therefore, next, in order to discharge and stack the product 100, the support member is removed, such as Figure 11 and Figure 12 As shown, the dropping process is performed. Figure 11 It is a plan view showing a state where the product 100 has fallen from the material 600 . Figure 12 yes Figure 11 The sectional view of the AA line section showing the falling process. Figure 12 As shown, the punch 202 having a flat surface in the plane direction is used to press the product 100 downward, so that the product 100 is separated from the material 600 and discharged into a die 500 different from the die originally used to form the product 100. Figure 11 As shown, product 100 is formed from material 600 .

[0144] The narrow width portion 101 of the product 110 manufactured through the above process is characterized in that Figure 13 As shown, burrs or traces of burrs being flattened are observed on the upper side Y1 of the first surface 111 and the lower side Y2 of the second surface 112 of the narrow portion 101. Furthermore, characteristically, edge collapse is observed on the lower side Y2 of the first surface 111 and the upper side Y1 of the second surface 112. The burrs and edge collapse shown here do not indicate defects but rather represent characteristic appearances resulting from this manufacturing process.

[0145] Thus, in the first embodiment, after the outermost peripheral surface 102 of the product 100 is punched and returned, the flattening process is performed, and then the hole processing process for forming the hole portion 120 inside the product 100 is performed, and the product 100 is manufactured by dropping. Therefore, the product 100 can be manufactured in four steps. In contrast, in the comparative example, as shown in FIG. Figure 82 A, B → Figure 82 C, D → Figure 82 E, F → Figure 82 G, H → Figure 82 As shown in I and J, the product is manufactured in a minimum of five steps. Therefore, the first embodiment can reduce the number of steps compared to the comparative example. Furthermore, the first embodiment improves the material yield.

[0146] The punching device of the first embodiment constructed as described above is a punching device for punching out a material to manufacture a product, and when punching out a narrow portion of the product having a width smaller than the plate thickness of the material, the punching is performed while suppressing movement of the narrow portion in the planar direction.

[0147] Furthermore, the iron core manufacturing method uses the above-described press apparatus to manufacture the product obtained by punching out the material as the iron core of the rotating electrical machine.

[0148] Furthermore, a method for manufacturing a rotating electric machine manufactures a rotating electric machine using the iron core manufactured by the method for manufacturing an iron core described above.

[0149] Therefore, the strength of the narrow width portion can be ensured, an iron core with excellent precision can be obtained, and a rotating electrical machine with excellent quality can be obtained.

[0150] Moreover, the stamping device of embodiment 1 has a punch, a support, a stripper plate and a die, the punch and the support clamping the material and arranged opposite to each other up and down, the stripper plate and the die clamping the material and arranged opposite to each other up and down, and the punch, the support, the stripper plate and the die are arranged at a position to suppress the narrow width portion from moving in the planar direction, so that the strength of the narrow width portion can be reliably ensured.

[0151] Moreover, in the stamping device of embodiment 1, when the surface formed by cutting one side of the width direction of the narrow width portion is set as the first surface, and the surface formed by cutting the other side of the width direction of the narrow width portion is set as the second surface, and the outermost peripheral surface formed by cutting the product has the first surface or the second surface of the narrow width portion, the punch is configured to punch out the first surface or the second surface of the narrow width portion after punching out the outermost peripheral surface of the product, thereby reliably ensuring the strength of the narrow width portion.

[0152] Furthermore, in the press device of the first embodiment, the support member is arranged so as to press the material against the punch, and therefore the strength of the narrow width portion can be reliably ensured.

[0153] Moreover, in the stamping device of embodiment 1, the surface formed by cutting one side of the width direction of the narrow width portion is set as the first surface, and the surface formed by cutting the other side of the width direction of the narrow width portion is set as the second surface, and the outermost peripheral surface formed by cutting the product has the first surface of the narrow width portion, after the punch punches at least a part of the entire circumference of the outermost peripheral surface of the product, the support member is configured to embed the outermost peripheral surface punched by the punch back into the material, and after the support member embeds the outermost peripheral surface punched by the punch back into the material, the stripper plate and the die are configured to press the narrow width portion on the inner side of the outermost peripheral surface and the material on the outer side of the outermost peripheral surface, so that the strength of the narrow width portion can be more reliably ensured.

[0154] Moreover, in the stamping device of embodiment 1, when the outermost peripheral surface that is embedded back is cut off in the direction of the plate thickness, and the stripper plate and the die press the narrow width portion on the inner side of the outermost peripheral surface and the material on the outer side of the outermost peripheral surface, the punch is configured to punch out the second surface of the narrow width portion, thereby being able to more reliably ensure the strength of the narrow width portion.

[0155] Implementation method 2.

[0156] In this second embodiment, unlike the first embodiment, the case where the hole portion 120 of the product 100 is formed first and the outermost peripheral surface 102 is formed later will be described. The same reference numerals are used to designate the same parts as those in the first embodiment. The description will focus on the parts that differ from the first embodiment.

[0157] First, if Figure 15 and Figure 16 As shown, a hole machining step of forming the hole portion 120 is performed. Figure 15 It is a plan view showing a state after the hole portion 120 is formed. Figure 16 yes Figure 15 The cross-sectional view of the hole processing process of the hole portion 120 at the AA line cross section is shown. Figure 16 As shown, punch 201 is positioned on upper side Y1 of material 600. Punch 201 then punches material 600, forming hole 120 of product 100. Hole 120 includes second surface 112 of narrow portion 101. Hole scrap 601 released from hole 120 is ejected into die 502.

[0158] Furthermore, at this time, a stripper plate 402 is arranged around the punch 201 on the upper side Y1 of the material 600, and a die 502 having the same planar shape as the stripper plate 402 is arranged on the lower side Y2 opposite to the stripper plate 402 across the material 600. Therefore, the material 600 outside the hole 120 is clamped and fixed by the stripper plate 402 and the die 502.

[0159] In this process, the hole portion 120 is formed in the second surface 112 of the narrow portion 101. Thus, the hole portion 120 is formed while the second surface 112 of the narrow portion 101 is fixed by the punch 201, the stripper plate 402, the die 502, and the material 600 clamped by the stripper plate 402 and the die 502, while the upper surface Y1 and lower surface Y2 of the narrow portion 101 are clamped. Therefore, the second surface 112 of the narrow portion 101 is prevented from moving in a planar direction. This prevents deformation and edge collapse of the narrow portion 101.

[0160] Then, if Figure 17 and Figure 18 As shown, the material 600 is punched out by the punch 200 to perform a punching process for forming the outermost peripheral surface 102 of the product 100 . Figure 17 The state in which the product 100 is punched out by punching out the material 600 along the outermost peripheral surface 102 of the product 100 is shown. Figure 18 yes Figure 17 A cross-sectional view showing the blanking process at the AA line section.

[0161] like Figure 18 As shown, a punch 200 is arranged on the upper side Y1 of the material 600, and a support member 300 having the same shape as the punch 200 on the plane is arranged from the lower side Y2 of the material 600. The punch 200 is used to perform blanking while clamping the previously formed product 100 housed in the die 500. Thus, the outermost peripheral surface 102 of the product 100 is formed and discharged into the die 500 as the product 100. At this time, a protrusion 222 is formed on the punch 200 to abut against the previously formed second surface 112 of the narrow width portion 101. In addition, Figure 17 , for convenience, the planar arrangement position of the protrusion 222 is shown. As can be seen from this figure, the protrusion 222 is arranged along the second surface 112 of the narrow width portion 101.

[0162] Furthermore, at this time, a stripper plate 400 is arranged around the punch 200 on the upper side Y1 of the material 600, and a die 500 having the same planar shape as the stripper plate 400 is arranged on the lower side Y2 of the stripper plate 400, opposite to the material 600. Therefore, the material 600 on the outer side of the product 100 is clamped and fixed by the stripper plate 400 and the die 500.

[0163] Furthermore, in this process, the outermost peripheral surface 102 of the first surface 111 having the narrow width portion 101 is formed. Therefore, the second surface 112 and the first surface 111 of the narrow width portion 101 are in a state of being fixed by the punch 200 and the support 300 of the formed product 100, the protrusion 222, the stripper plate 400 and the die 500, and the material 600 clamped by the stripper plate 400 and the die 500, so that the movement of the narrow width portion 101 in the plane direction is suppressed. At this time, the fixed portion is Figure 19 The portions indicated by the bold lines, namely, the second surface 112, the upper surface 103 on the upper side Y1 of the narrow portion 101, and the lower surface 104 on the lower side Y2 of the narrow portion 101, are fixed. This prevents the narrow portion 101 from falling, deforming, or reducing its cross-sectional area, thereby ensuring the strength of the narrow portion 101.

[0164] In addition, in the above embodiment 2 Figure 18 , an example is shown in which the protrusion 222 is formed over the entire height of the second surface 112 of the narrow width portion 101 in the plate thickness direction Y, but the present invention is not limited thereto. Figure 20 As shown in FIG, it can also be about 50% of the thickness of the narrow width portion 101. This is because when punching, Figure 20 The protrusion 222 is configured to prevent the rotational force in the direction of the arrow R1 and the arrow R2 shown. In addition, the gap between the protrusion 22 and the narrow width portion 101 is allowed as long as it is less than the deflection amount within the elastic deformation range of the narrow width portion 101. Figure 18 In the process, the punching of the product 100 and the formation of the narrow width portion 101 can be performed simultaneously.

[0165] The narrow width portion 101 of the product 110 manufactured through the above process is characterized in that Figure 21 As shown, burrs or traces of burrs being flattened are observed on the upper side Y1 of the first surface 111 and the lower side Y2 of the second surface 112 of the narrow portion 101. Furthermore, characteristically, edge collapse is observed on the lower side Y2 of the first surface 111 and the upper side Y1 of the second surface 112. The burrs and edge collapse shown here do not indicate defects but rather represent characteristic appearances resulting from this manufacturing process.

[0166] In addition, in the second embodiment, the punching process is performed after the hole processing process of the product 100 to manufacture the product 100, so the product 100 can be manufactured in two steps. Figure 82 The comparative example of FIG. 1 manufactures a product in five steps, so the present embodiment 2 can reduce the number of steps compared to the comparative example. Furthermore, according to the present embodiment 2, the material yield is improved.

[0167] The stamping device of embodiment 2 constructed as described above has the same effect as that of embodiment 1 described above, and, when the surface formed by cutting one side of the width direction of the narrow width portion is set as the first surface, and the surface formed by cutting the other side of the width direction of the narrow width portion is set as the second surface, and the first surface and the second surface are punched out at different stages, the punch has a protrusion that abuts against the first surface or the second surface that is punched out first, thereby reliably ensuring the strength of the narrow width portion.

[0168] Implementation method 3.

[0169] In this third embodiment, unlike the first embodiment, similar to the second embodiment, the case where the hole portion 120 of the product 100 is formed first and the outermost peripheral surface 102 is formed later will be described. The same reference numerals are used to designate the same parts as those in the above embodiments. The description will focus on the parts that differ from those in the above embodiments.

[0170] First, similarly to the above-mentioned embodiment 2, Figure 15 and Figure 16 As shown, a hole machining step of forming the hole portion 120 is performed.

[0171] Then, if Figure 22 and Figure 23 As shown, the material 600 is punched out by the punch 200 , and a punching return process is performed to form the outermost peripheral surface 102 of the product 100 . Figure 22 The state in which the product 100 is punched out by punching out the material 600 along the outermost peripheral surface 102 of the product 100 is shown. Figure 23 yes Figure 17 A cross-sectional view showing the blanking process at the AA line section.

[0172] like Figure 23 As shown, a punch 200 is placed on the upper side Y1 of the material 600, and a support member 300 having the same shape as the punch 200 on the plane is placed from the lower side Y2 of the material 600, and punching is performed using the punch 200. Then, the outermost peripheral surface 102 of the product 100 is formed. At this time, a protrusion 333 is formed on the support member 300 to abut against the second surface 112 formed previously of the narrow width portion 101. In addition, Figure 22 , for convenience, the planar arrangement position of the protrusion 333 is shown. As can be seen from this figure, the protrusion 333 is arranged along the second surface 112 of the narrow width portion 101.

[0173] Furthermore, at this time, a stripper plate 400 is arranged around the punch 200 on the upper side Y1 of the material 600, and a die 500 having the same planar shape as the stripper plate 400 is arranged on the lower side Y2 of the stripper plate 400, opposite to the material 600. Therefore, the material 600 on the outer side of the product 100 is clamped and fixed by the stripper plate 400 and the die 500.

[0174] Furthermore, in this process, the outermost peripheral surface 102 having the first surface 111 of the narrow width portion 101 is formed. Therefore, the second surface 112 and the first surface 111 of the narrow width portion 101 are fixed by the punch 200 and the support member 300, the protrusion 333, the stripper plate 400 and the die 500, and the material 600 clamped by the stripper plate 400 and the die 500, so that the movement of the narrow width portion 101 in the planar direction is suppressed.

[0175] In addition, if Figure 26 As shown in the enlarged cross-sectional view of FIG, it is not necessary to form the protrusion 333 along the entire height of the second surface 112 of the narrow portion 101 in the plate thickness direction Y, and it is sufficient to form it along a height of more than 80% of the thickness of the narrow portion 101. This is because during punching, a protrusion 333 is generated. Figure 26 The protrusion 333 is designed to prevent rotational forces in the directions of arrows R1 and R2 shown. Furthermore, the gap between the protrusion 333 and the narrow portion 101 is permitted as long as it is less than the deflection within the elastic deformation range of the narrow portion 101. This prevents the narrow portion 101 from collapsing, deforming, or reducing its cross-sectional area, thereby ensuring the strength of the narrow portion 101.

[0176] and, Figure 22 The relationship between the material 600 and the product 100 when the process is completed is similar to that of the first embodiment. Figure 14 As shown, the punched product 100 is pushed back by the support member 300 so that the punched product 100 is embedded in the original material 600 by at least 20% of the plate thickness.

[0177] Therefore, next, in order to discharge and stack the product 100, the support is removed, such as Figure 24 and Figure 25 As shown, the dropping process is performed. Figure 24 It is a plan view showing a state where the product 100 has fallen from the material 600 . Figure 25 yes Figure 24 The sectional view of the AA line section showing the falling process. Figure 25 As shown in FIG. 1 , the punch 202 having a flat surface in the plane direction is used to press the product 100 downward, so that the product 100 is separated from the material 600 and discharged into the die 500. Figure 24 As shown, product 100 is formed from material 600 .

[0178] The narrow width portion 101 of the product 110 manufactured through the above process is characterized in that Figure 27 As shown, burrs or traces of burrs being flattened are observed on the upper side Y1 of the first surface 111 and the lower side Y2 of the second surface 112 of the narrow portion 101. Furthermore, characteristically, edge collapse is observed on the lower side Y2 of the first surface 111 and the upper side Y1 of the second surface 112. The burrs and edge collapse shown here do not indicate defects but rather represent characteristic appearances resulting from this manufacturing process.

[0179] In addition, in the third embodiment, after the hole processing step of the product 100 is performed, the punching return step is performed, and the dropping step is performed to manufacture the product 100, so the product 100 can be manufactured in three steps. Figure 82 The comparative example of FIG. 1 manufactures a product in five steps, so the present embodiment 3 can reduce the number of steps compared to the comparative example. Furthermore, according to the present embodiment 3, the material yield is improved.

[0180] The stamping device of embodiment 3 constructed as described above has the same effect as the above-mentioned embodiments, and, when the surface formed by cutting one side of the width direction of the narrow width portion is set as the first surface, and the surface formed by cutting the other side of the width direction of the narrow width portion is set as the second surface, and the first surface and the second surface are punched out at different stages, the support member has a protrusion that abuts against the first surface or the second surface that is punched out first, thereby being able to reliably ensure the strength of the narrow width portion.

[0181] Implementation method 4.

[0182] In this fourth embodiment, unlike the first embodiment, similar to the second and third embodiments, the case where the hole portion 120 of the product 100 is formed first and the outermost peripheral surface 102 is formed later will be described. The same reference numerals are used to designate the same parts as those in the above embodiments. The description will focus on the parts that differ from those in the above embodiments.

[0183] First, if Figure 28 and Figure 29 As shown, a punching return process is performed to form the hole portion 120. Figure 28 It is a plan view showing a state after the hole portion 120 is formed. Figure 29 yes Figure 28 The cross-sectional view of the punching return process of the hole portion 120 at the AA line cross section is shown. Figure 29As shown, a punch 201 is positioned on the upper side Y1 of a material 600, and a support member 301 having the same planar shape as the punch 201 is positioned from the lower side Y2 of the material 600. While the material 600 is being held between the punch 201, the punch 201 is used to perform blanking to form a hole 120 in the product 100. The hole 120 includes the second surface 112 of the narrow width portion 101.

[0184] Furthermore, at this time, a stripper plate 402 is arranged around the punch 201 on the upper side Y1 of the material 600, and a die 502 having the same planar shape as the stripper plate 402 is arranged on the lower side Y2 opposite to the stripper plate 402 across the material 600. Therefore, the material 600 outside the hole 120 is clamped and fixed by the stripper plate 402 and the die 502.

[0185] In this process, a hole 120 is formed on the second surface 112 of the narrow portion 101. Thus, the hole 120 is formed while the second surface 112 of the narrow portion 101 is fixed by the punch 201 and the support 301, the stripper plate 402 and the die 502, and the material 600 clamped by the stripper plate 402 and the die 502. Consequently, the second surface 112 of the narrow portion 101 is prevented from moving in a planar direction. This prevents deformation and edge collapse of the narrow portion 101.

[0186] and, Figure 28 The relationship between the material 600 and the hole waste 601 when the process is completed is similar to the above-mentioned embodiments, in which the support member 301 pushes back the punched hole portion 120, so that the punched hole waste 601 is embedded in the original material 600 by at least 20% of the plate thickness. Figure 28 In the punching return process, the hole waste 601 may not be fully returned to the same position as the material 600. Therefore, next, as Figure 30 and Figure 31 As shown, a punching process is performed to embed hole scrap 601 into material 600. Figure 30 1 is a top view showing a state after the hole waste 601 is punched into the material 600. Figure 31 yes Figure 30 The cross-sectional view of the AA line section represents the flattening process. Figure 31 As shown, the hole waste 601 is clamped by the stripper plate 401 and the die 501 having a flat surface in the plane direction, and the hole waste 601 is embedded back into the original position in the hole portion 120 of the material 600. Figure 30 As shown, hole scrap 601 is embedded back into material 600 .

[0187] Then, if Figure 32 and Figure 33As shown, the material 600 into which the hole scrap 601 has been inserted is punched out by the punch 200 , thereby performing a punching-back process for forming the outermost peripheral surface 102 of the product 100 . Figure 32 The figure shows a state where the material 600 into which the hole scrap 601 has been inserted is punched out along the outermost peripheral surface 102 of the product 100 and then subjected to return processing. Figure 33 yes Figure 32 A cross-sectional view showing the blanking process at the AA line section.

[0188] like Figure 33 As shown, a punch 200 is positioned on the upper side Y1 of the material 600 with the hole waste 601 re-embedded. A support member 300, having the same planar shape as the punch 200, is positioned from the lower side Y2 of the material 600. While sandwiching the material 600 with the hole waste 601 re-embedded, the punch 200 performs blanking to form the outermost peripheral surface 102 of the product 100. This outermost peripheral surface 102 includes the first surface 111 of the narrow width portion 101. At this time, the support member 300 presses the material 600 toward the upper side Y1 against the punch 200 with a force that is at least 50% of the shear load of the material 600. The blanking process is performed while the material 600 that will become the product 100 is sandwiched between the punch 200 and the support member 300. This prevents warping of the product 100 and the occurrence of edge collapse.

[0189] Furthermore, at this time, a stripper plate 400 is arranged around the punch 200 on the upper side Y1 of the material 600, and a die 500 having the same planar shape as the stripper plate 400 is arranged on the lower side Y2 of the stripper plate 400, opposite to the material 600. Therefore, the material 600 on the outer side of the product 100 is clamped and fixed by the stripper plate 400 and the die 500.

[0190] Furthermore, in this process, the outermost peripheral surface 102 having the first surface 111 of the narrow width portion 101 is formed. Therefore, the outermost peripheral surface 102 is in a fixed state by the punch 200 and the support member 300, the stripper plate 400 and the die 500, and the material 600 clamped by the stripper plate 400 and the die 500, so that the outermost peripheral surface 102, that is, the first surface 111 of the narrow width portion 101, is suppressed from moving in the planar direction.

[0191] Thus, when using the punch 200 and the support 300, Figure 40 A is formed as shown in FIG. 1 , and when only a punch is used, as in the comparative example Figure 40 It is formed as shown in B. Figure 40 A and Figure 40 As can be seen from the comparison of B, the case where the support 300 is used suppresses the occurrence of edge collapse, and the dimensional accuracy of the product 100 is improved, compared with the case where no support is used.

[0192] and, Figure 32 The relationship between the material 600 and the product 100 in which the hole waste 601 is embedded after the process is completed is similar to that of the first embodiment. Figure 14 As shown, the support member 300 pushes back the product 100 embedded in the punched hole waste 601, so that the punched product 100 is embedded in the original material 600 by at least 20% of the plate thickness. Figure 32 In the blanking return process, the product 100 may not be fully returned to the same position as the material 600. Therefore, next, as Figure 34 and Figure 35 As shown, a punching process is performed to embed the product 100 with the hole waste 601 embedded back into the material 600.

[0193] Figure 34 1 is a top view showing a state in which the product 100 with the hole waste 601 embedded therein is punched flat into the material 600 . Figure 35 yes Figure 34 The cross-sectional view of the AA line section represents the flattening process. Figure 35 As shown, the product 100 with the hole waste 601 inserted back is clamped by using the stripper plate 401 having a flat surface in the plane direction and the die 501, and the product 100 with the hole waste 601 inserted back is inserted back into the original position of the material 600. Figure 34 As shown, the product 100 with the hole waste 601 embedded back is embedded back into the material 600.

[0194] Next, in order to discharge the hole waste 601 of the product 100 in which the hole waste 601 is embedded, the support member is removed, such as Figure 36 and Figure 37 As shown, the hole dropping process is carried out. Figure 36 It is a plan view showing a state where the hole scrap 601 has fallen from the product 100 . Figure 37 yes Figure 36 The cross-sectional view of the hole dropping process at the AA line section of FIG. Figure 37 As shown, the punch 215 having a flat surface in the planar direction is used to press down the hole waste 601 embedded in the product 100 so that the hole waste 601 is separated from the product 100 and discharged into the die 502.

[0195] Next, in order to discharge and stack the product 100, the support is removed, such as Figure 38 and Figure 39 As shown, the dropping process is performed. Figure 38 It is a plan view showing a state where the product 100 has fallen from the material 600 . Figure 39 yes Figure 38 The sectional view of the AA line section showing the falling process. Figure 39As shown in FIG. 1 , the punch 202 having a flat surface in the plane direction is used to press the product 100 downward, so that the product 100 is separated from the material 600 and discharged into the die 500. Figure 38 As shown, product 100 is formed from material 600 .

[0196] The narrow width portion 101 of the product 110 manufactured through the above process is characterized in that, similarly to the first embodiment, Figure 13 As shown, burrs or traces of burrs being flattened are observed on the upper side Y1 of the first surface 111 and the lower side Y2 of the second surface 112 of the narrow portion 101. Furthermore, characteristically, edge collapse is observed on the lower side Y2 of the first surface 111 and the upper side Y1 of the second surface 112. The burrs and edge collapse shown here do not indicate defects but rather represent characteristic appearances resulting from this manufacturing process.

[0197] The press device of the fourth embodiment configured as described above can achieve the same effects as those of the above-described embodiments and can reliably ensure the strength of the narrow width portion.

[0198] Implementation method 5.

[0199] In this fifth embodiment, similar to the first embodiment, the outermost peripheral surface 102 of the product 100 is formed first, and then the hole 120 is formed. The same reference numerals are used to designate the same parts as those in the above embodiments. The description will focus on the parts that differ from the first embodiment.

[0200] First, similarly to the above-mentioned embodiment 1, Figure 5 and Figure 6 As shown, the blanking return process is performed to form the outermost peripheral surface 102 of the product 100. Then, Figure 5 In the blanking return process, the product 100 is not fully returned to the same position as the material 600, so next, as shown in FIG. Figure 7 and Figure 8 As shown, a punching process is performed to embed the product 100 in the material 600.

[0201] Then, if Figures 41 to 43 As shown, a hole machining step of forming the hole portion 120 is performed. Figure 41 It is a plan view showing a state after the hole portion 120 is formed. Figure 42 yes Figure 41 AA line cross-sectional view showing the hole machining step of the hole portion 120 . Figure 43 Yes Figure 42 An enlarged cross-sectional view of a portion of the details. Figure 42As shown, punch 201 is positioned on upper side Y1 of material 600. Punch 201 then punches material 600, forming hole 120 of product 100. Hole 120 includes second surface 112 of narrow portion 101. Hole scrap 601 released from hole 120 is ejected into die 502.

[0202] Moreover, at this time, a stripper plate 402 is arranged around the punch 201 on the upper side Y1 of the material 600, and a die 502 having the same shape as the stripper plate 402 on the plane is arranged on the lower side Y2 of the stripper plate 402 opposite to the material 600. Figure 43 As shown, a protrusion 555 is formed on the upper side Y1 of the die 502. The protrusion 555 is formed at a position where it contacts the narrow width portion 101 in a plane. Figure 41 , shows the planar arrangement position of the protrusion 555. As can be seen from this figure, the protrusion 555 is arranged at a position that abuts against the narrow width portion 101 in the planar direction as described above.

[0203] In this process, the hole portion 120 having the second surface 112 of the narrow width portion 101 is formed. Therefore, the hole portion 120 is formed in a state where the upper side Y1 and the lower side Y2 surfaces of the narrow width portion 101 are clamped, and the first surface 111 and the second surface 112 of the narrow width portion 101 are fixed using the punch 201, the stripper plate 402 and the die 502, and the material 600 clamped by the stripper plate 402 and the die 502. Moreover, the surface of the lower side Y2 of the narrow width portion 101 is pressed by the protrusion 555 of the die 502. Therefore, the narrow width portion 101 is suppressed from moving in the planar direction and is formed. As a result, deformation and collapse of the narrow width portion 101 are suppressed.

[0204] exist Figure 41 In the process, the hole portion 120 is punched out, and the product 100 having completed the formation of the narrow width portion 101 becomes embedded and pressed into the material 600. Therefore, next, in order to discharge and stack the product 100, the support member is removed, such as Figure 44 and Figure 45 As shown, the dropping process is performed. Figure 44 It is a plan view showing a state where the product 100 has fallen from the material 600 . Figure 45 yes Figure 11 The sectional view of the AA line section showing the falling process. Figure 45 As shown in FIG. 1 , the punch 202 having a flat surface in the plane direction is used to press the product 100 downward, so that the product 100 is separated from the material 600 and discharged into the die 500. Figure 44 As shown, product 100 is formed from material 600 .

[0205] The narrow width portion 101 of the product 110 manufactured by the above process is characterized in that Figure 46 B is different. In this embodiment 5, as Figure 46 As shown in Figure A, traces of burrs being flattened are observed on the upper side Y1 of the first surface 111 of the narrow portion 101, and burrs are observed on the lower side Y2 of the second surface 112. Furthermore, collapsed edges are observed on the lower side Y2 of the first surface 111 and the upper side Y1 of the second surface 112.

[0206] That is, Figure 46 As shown in Figure A, a first burr 701 protruding from one end surface of the material 600 in the plate thickness direction Y is formed on one end side of the first surface 111, i.e., the upper side Y1 in the plate thickness direction Y, and a second burr 702 protruding from the other end surface of the material in the plate thickness direction Y is formed on the other end side of the second surface 112 in the plate thickness direction Y, i.e., the lower side Y2. The first burr 701 has a mark of being flattened, and the height H1 of the first burr 701 protruding from one end surface of the material 600 in the plate thickness direction Y is smaller than the height H2 of the second burr 702 protruding from the other end surface of the material in the plate thickness direction Y. The product 100 having the narrow portion 101 formed in this way is used as the core 40 of the rotating motor 1. Moreover, the narrow portion 101 is equivalent to the narrow portion (bridge) 12 of the core 40, and the rotating motor 1 having the core 40 is, for example, Figure 1 and Figure 2 As shown.

[0207] The reason why the traces of the burrs being crushed are observed on the upper side Y1 of the first surface 111 of the narrow width portion 101 is that, first, similarly to the first embodiment, Figure 7 and Figure 8 The clamping is performed once in the flattening process, and in this embodiment 5, as Figure 41 、 Figure 42 、 Figure 43 As shown in FIG, the protrusion 555 is provided, thereby pressing the narrow width portion 101 in the upper and lower directions of the plate thickness direction Y in a manner such that the narrow width portion 101 is completely flattened. Figure 5 and Figure 6 The burrs generated during the return punching process are flattened. The burrs and edge collapse shown here do not indicate defects but rather represent the characteristic appearance of this process.

[0208] Thus, in the fifth embodiment, after the outermost peripheral surface 102 of the product 100 is punched and returned, a flattening process is performed, and then a hole processing process is performed to form the hole portion 120 inside the product 100, and the product 100 is manufactured by dropping processing, so that the product 100 can be manufactured in four steps. Figure 82The product is manufactured in a minimum of five steps. Therefore, the fifth embodiment can reduce the number of steps compared to the comparative example. Furthermore, the fifth embodiment improves the yield of the material.

[0209] The press device of the fifth embodiment configured as described above achieves the same effects as those of the above embodiments. Furthermore, since the die includes the protruding portion protruding along the plane direction of the narrow width portion, the strength of the narrow width portion can be reliably ensured.

[0210] Moreover, the rotating electric machine of embodiment 5 constructed as described above includes the following rotating electric machine core: in a narrow width portion formed on the rotating electric machine core punched out from a material by a stamping device and formed with a width smaller than the plate thickness of the material, when a surface formed by cutting one side of the width direction of the narrow width portion is set as a first surface, and a surface formed by cutting the other side of the width direction of the narrow width portion is set as a second surface, a first burr protruding from the one end surface of the material in the plate thickness direction is formed on one end side of the first surface in the plate thickness direction, and a second burr protruding from the other end surface of the material in the plate thickness direction is formed on the other end side of the second surface in the plate thickness direction, the first burr has a mark of being flattened, and the height of the first burr protruding from the one end surface of the material in the plate thickness direction is smaller than the height of the second burr protruding from the other end surface of the material in the plate thickness direction, so that the strength of the narrow width portion can be ensured, thereby improving the quality of the rotating electric machine.

[0211] Implementation method 6.

[0212] In this sixth embodiment, a press working process different from that of the above-mentioned embodiments will be described. However, the product 100 having the narrow width portion 101 has the same shape.

[0213] First, based on Figures 47 to 56 , a method for manufacturing a product using a punching device having the same structure as in the above-mentioned embodiments will be described. Figures 47 to 49 As shown, the material 600 is half-blanked by the punch 210 , and a half-blanking step is performed to form a portion of the outermost peripheral surface 102 of the product 100 in the plate thickness direction Y. Figure 47 The material 600 is shown in a state where a half-blanking process is performed along the outermost peripheral surface 102 of the product 100 . Figure 48 yes Figure 47 A cross-sectional view showing the half blanking process at the AA line section. Figure 49 Yes Figure 48The partially enlarged cross-sectional view of the structure of the details only briefly shows the main parts. In addition, in this disclosure, "half blanking" means cutting off a part of the material 600 in the plate thickness direction Y and retaining a part, and is used in the same meaning in each embodiment, so its description is appropriately omitted.

[0214] like Figure 48 and Figure 49 As shown, a punch 210 is positioned on the upper side Y1 of the material 600, and a support member 300, approximately the same shape as the punch 210 in plan view, is positioned on the lower side Y2 of the material 600. While sandwiching the material 600, the punch 210 performs a partial blanking operation, forming a portion of the outermost surface 102 of the product 100 in the thickness direction Y, down to approximately 80% of the thickness in the thickness direction Y. The material 600 is not completely cut. This outermost surface 102 includes the first surface 111 of the narrow width portion 101. At this time, the support member 300 presses the material 600 toward the upper side Y1 against the punch 210 with a force that is at least 50% of the shear load of the material 600. Blanking is performed while the portion of the material 600 that will become the product 100 is sandwiched between the punch 210 and the support member 300. This prevents warping of the product 100 and the occurrence of edge collapse.

[0215] Furthermore, at this time, a stripper plate 400 is arranged around the punch 210 on the upper side Y1 of the material 600, and a die 500 having the same planar shape as the stripper plate 400 is arranged on the lower side Y2 of the stripper plate 400, opposite to the material 600. Therefore, the material 600 on the outer side of the product 100 is clamped and fixed by the stripper plate 400 and the die 500.

[0216] Furthermore, during this process, the outermost surface 102 of the first surface 111 having the narrowed portion 101 is half-blanked to approximately 80% of its original thickness in the plate thickness direction Y. This prevents the punch 210 from moving to a position where it contacts the die 500. Consequently, the difference between the outer dimensions of the punch 210 and the inner diameter of the die 500 can be reduced to zero or less, further suppressing the occurrence of edge collapse in the material 600.

[0217] In addition, the outermost peripheral surface 102 is in a state of being fixed by the punch 210 and the support 300, the stripper plate 400 and the die 500, and the material 600 clamped by the stripper plate 400 and the die 500, so the movement of the outermost peripheral surface 102, that is, the first surface 111 of the narrow width portion 101 in the planar direction is suppressed.

[0218] and, Figure 47 The relationship between the material 600 and the product 100 when the process is completed is as described above. Figure 49 As shown in FIG, the half blanking process makes the product 100 connected to the original material 600 by more than 20% of the plate thickness. Figures 50 to 52 As shown, a punching process is performed to embed the product 100 in the material 600. Figure 50 It is a top view showing the state after the product 100 is flattened into the material 600. Figure 51 yes Figure 50 A cross-sectional view showing the flattening process at the AA line section. Figure 52 Yes Figure 51 This is a partially enlarged cross-sectional view of the detailed structure of FIG. 1 , and only the main parts are shown for simplicity.

[0219] like Figure 51 As shown in FIG, by using the stripper plate 401 having a flat surface in the plane direction and the die 501 to clamp the product 100, the product 100 is embedded back into the original position of the material 600. Figure 50 As shown, the product 100 is embedded back into the material 600. In this process, the outermost peripheral surface 102 of the first surface 111 having the narrow width portion 101, which is connected to the plate thickness direction Y, returns to its original position. Figure 52 As shown in FIG. 1 , the outermost peripheral surface 102 of the product 100 is formed by being completely cut. Therefore, collapsed edges are formed on both the upper side Y1 and the lower side Y2 of the outermost peripheral surface 102 of the product 100.

[0220] Then, if Figure 53 and Figure 54 As shown, a hole machining step of forming the hole portion 120 is performed. Figure 53 It is a plan view showing a state after the hole portion 120 is formed. Figure 54 yes Figure 53 The cross-sectional view of the hole processing process of the hole portion 120 at the AA line cross section is shown. Figure 54 As shown, punch 201 is positioned on upper side Y1 of material 600. Punch 201 then punches material 600, forming hole 120 of product 100. Hole 120 includes second surface 112 of narrow portion 101. Hole scrap 601 released from hole 120 is ejected into die 502.

[0221] Furthermore, at this time, a stripper plate 402 is arranged around the punch 201 on the upper side Y1 of the material 600, and a die 502 having the same planar shape as the stripper plate 402 is arranged on the lower side Y2 opposite to the stripper plate 402 across the material 600. Therefore, the product 100 and the material 600 outside the product 100 are clamped and fixed by the stripper plate 402 and the die 502.

[0222] In this process, a hole portion 120 is formed on the second surface 112 of the narrow width portion 101. Thus, the hole portion 120 is formed by clamping the upper side Y1 and lower side Y2 surfaces of the narrow width portion 101, and then using the punch 201, the stripper plate 402, the die 502, and the material 600 clamped by the stripper plate 402 and the die 502 to fix the first surface 111 and the second surface 112 of the narrow width portion 101. Therefore, the narrow width portion 101 is formed while being prevented from moving in a planar direction. This prevents deformation and edge collapse of the narrow width portion 101.

[0223] exist Figure 53 In the process, the hole portion 120 is punched out, and the product 100 having completed the formation of the narrow width portion 101 becomes embedded and pressed into the material 600. Therefore, next, in order to discharge and stack the product 100, the support member is removed, such as Figure 55 and Figure 56 As shown, the dropping process is performed. Figure 55 It is a plan view showing a state where the product 100 has fallen from the material 600 . Figure 56 yes Figure 55 The sectional view of the AA line section showing the falling process. Figure 56 As shown in FIG. 1 , the punch 202 having a flat surface in the plane direction is used to press the product 100 downward, so that the product 100 is separated from the material 600 and discharged into the die 500. Figure 55 As shown, product 100 is formed from material 600 .

[0224] The narrow width portion 101 of the product 110 manufactured through the above process is characterized in that Figure 57 As shown, burrs or traces of burrs being flattened are observed on the lower side Y2 of the second surface 112 of the narrow portion 101. Furthermore, characteristically, collapsed edges are observed on the upper side Y1 of the first surface 111, the lower side Y2 of the first surface 111, and the upper side Y1 of the second surface 112. The burrs and collapsed edges shown here do not indicate defects but rather represent a characteristic appearance resulting from this process.

[0225] Thus, in the sixth embodiment, after the semi-blanking process of the outermost peripheral surface 102 of the product 100 is performed, the flattening process is performed, and then the hole processing process of forming the hole portion 120 inside the product 100 is performed, and the product 100 is manufactured by the drop processing, so that the product 100 can be manufactured in four steps. Figure 82 The product is manufactured in a minimum of five steps. Therefore, the sixth embodiment can reduce the number of steps compared to the comparative example. Furthermore, the sixth embodiment improves the yield of the material.

[0226] The press device of the sixth embodiment configured as described above can achieve the same effects as those of the above-described embodiments and can stably manufacture a narrow width portion.

[0227] Implementation method 7.

[0228] In this seventh embodiment, a press working process different from that of the above-mentioned embodiments will be described. However, the product 100 having the narrow width portion 101 has the same shape.

[0229] First, based on Figures 58 to 68 , a method for manufacturing a product using a punching device having the same structure as in the above-mentioned embodiments will be described. Figures 58 to 61 As shown, the material 600 is partially punched out by the punch 203 , and a partial punching process is performed to leave a portion 666 of the outermost peripheral surface 102 of the product 100 in the plane direction. Figure 58 The material 600 is shown as being partially punched out along the outermost peripheral surface 102 of the product 100 . Figure 59 yes Figure 58 A cross-sectional view showing the local blanking process at the AA line section.

[0230] Figure 60 and Figure 61 Yes Figure 59 The enlarged perspective view of the detailed structure of FIG. 5 simply shows the main parts of the stripper plate 400 and the die 500, with only the stripper plate 400 and the die 500 omitted.

[0231] like Figure 58 and Figure 60 As shown, the punch 203 is arranged on the upper side Y1 of the material 600, and the support 303 having the same shape as the punch 203 on the plane is arranged from the lower side Y2 of the material 600. Then, in the state of clamping the material 600, as shown in FIG. Figure 61 As shown, the punch 203 performs partial blanking, forming a portion 666 of the outermost peripheral surface 102 of the product 100 in the planar direction without cutting. This portion 666 remains uncut and connected to the material 600. This outermost peripheral surface 102 includes the first surface 111 of the narrow portion 101. At this time, the support member 303 presses the material 600 toward the upper side Y1 against the punch 203 with a force that is at least 50% of the shear load of the material 600. The blanking process is performed while the portion of the material 600 that will become the product 100 is sandwiched between the punch 203 and the support member 303. This suppresses warping of the product 100 and prevents the occurrence of edge collapse.

[0232] Furthermore, at this time, a stripper plate 400 is arranged around the punch 203 on the upper side Y1 of the material 600, and a die 500 having the same planar shape as the stripper plate 400 is arranged on the lower side Y2 of the stripper plate 400, opposite to the material 600. Therefore, the material 600 on the outer side of the product 100 is clamped and fixed by the stripper plate 400 and the die 500.

[0233] Furthermore, in this process, as previously described, the outermost surface 102 of the first surface 111 having the narrow portion 101 is formed with a portion thereof not cut in the planar direction. Thus, in this seventh embodiment, a portion of the material 600 is not cut, and only a portion 666 is retained, and only the target portion is cut, without forming the entire outermost surface 102 of the product 100. Therefore, in the aforementioned embodiments in which the outermost surface 102 of the product 100 is punched out at once, there is a possibility of displacement during the process because the product 100 is moved between processes while being pressed in. However, in this seventh embodiment, by connecting a portion 666 of the outermost surface 102 to the material 600 without cutting, the possibility of displacement is eliminated, and stable dimensions can be achieved.

[0234] In addition, the outermost peripheral surface 102 which retains a portion 666 is in a state of being fixed by the punch 203 and the support 303, the stripper plate 400 and the die 500, and the material 600 clamped by the stripper plate 400 and the die 500, so that the movement of the outermost peripheral surface 102, that is, the first surface 111 of the narrow width portion 101 in the planar direction is suppressed.

[0235] and, Figure 58 The relationship between the material 600 and the product 100 at the completion of the process is that a portion of the outermost surface 102 of the product 100 is connected to the original material 600 through the partial punching process. Figure 62 and Figure 63 As shown, a punching process is performed to embed the product 100 in the material 600. Figure 62 It is a top view showing the state after the product 100 is flattened into the material 600. Figure 63 yes Figure 62 A cross-sectional view showing the flattening process at the AA line section.

[0236] like Figure 63 As shown in FIG, by using the stripper plate 401 having a flat surface in the plane direction and the die 501 to clamp the product 100, the product 100 is embedded back into the original position of the material 600. Figure 62 As shown, the product 100 is embedded back into the material 600. In this process, the portion connected to the outermost peripheral surface 102 of the first surface 111 having the narrow width portion 101 returns to its original position. Figure 62As shown, the outermost peripheral surface 102 of the product 100 is completely cut. Therefore, collapsed edges are formed on both the upper side Y1 and the lower side Y2 of the outermost peripheral surface 102 of the product 100.

[0237] Then, if Figure 64 and Figure 65 As shown, a hole machining step of forming the hole portion 120 is performed. Figure 64 It is a plan view showing a state after the hole portion 120 is formed. Figure 65 yes Figure 64 The cross-sectional view of the hole processing process of the hole portion 120 at the AA line cross section is shown. Figure 65 As shown, punch 201 is positioned on upper side Y1 of material 600. Punch 201 then punches material 600, forming hole 120 of product 100. Hole 120 includes second surface 112 of narrow portion 101. Hole scrap 601 released from hole 120 is ejected into die 502.

[0238] Furthermore, at this time, a stripper plate 402 is arranged around the punch 201 on the upper side Y1 of the material 600, and a die 502 having the same planar shape as the stripper plate 402 is arranged on the lower side Y2 opposite to the stripper plate 402 across the material 600. Therefore, the product 100 and the material 600 outside the product 100 are clamped and fixed by the stripper plate 402 and the die 502.

[0239] In this process, a hole portion 120 is formed on the second surface 112 of the narrow width portion 101. Thus, the hole portion 120 is formed by clamping the upper side Y1 and lower side Y2 surfaces of the narrow width portion 101, and then using the punch 201, the stripper plate 402, the die 502, and the material 600 clamped by the stripper plate 402 and the die 502 to fix the first surface 111 and the second surface 112 of the narrow width portion 101. Therefore, the narrow width portion 101 is formed while being prevented from moving in a planar direction. This prevents deformation and edge collapse of the narrow width portion 101.

[0240] exist Figure 64 In the process, the hole portion 120 is punched out, and the product 100 having completed the formation of the narrow width portion 101 becomes embedded and pressed into the material 600. Therefore, next, in order to discharge and stack the product 100, the support member is removed, such as Figure 66 and Figure 67 As shown, the dropping process is performed. Figure 66 It is a plan view showing a state where the product 100 has fallen from the material 600 . Figure 67 yes Figure 66 The sectional view of the AA line section showing the falling process. Figure 67As shown in FIG. 1 , the punch 202 having a flat surface in the plane direction is used to press the product 100 downward, so that the product 100 is separated from the material 600 and discharged into the die 500. Figure 66 As shown, product 100 is formed from material 600 .

[0241] The narrow width portion 101 of the product 110 manufactured through the above process is characterized in that Figure 68 As shown, burrs or traces of burrs being flattened are observed on the upper side Y1 of the first surface 111 and the lower side Y2 of the second surface 112 of the narrow portion 101. Furthermore, characteristically, edge collapse is observed on the lower side Y2 of the first surface 111 and the upper side Y1 of the second surface 112. The burrs and edge collapse shown here do not indicate defects but rather represent characteristic appearances resulting from this manufacturing process.

[0242] Thus, in the seventh embodiment, after the partial punching process of the outermost peripheral surface 102 of the product 100 is performed, the flattening process is performed, and then the hole processing process of forming the hole portion 120 inside the product 100 is performed, and the product 100 is manufactured by the drop processing, so that the product 100 can be manufactured in four steps. Figure 82 In the embodiment 7, the product is manufactured in a minimum of five steps. Therefore, the number of steps can be reduced. Furthermore, according to the embodiment 7, the material yield is improved.

[0243] The press device of the seventh embodiment configured as described above can achieve the same effects as those of the above-described embodiments and can stably manufacture a narrow width portion.

[0244] Implementation method 8.

[0245] In the above-mentioned embodiments, an example is shown in which the first surface 111 is a part of the outermost peripheral surface 102 of the product 100, which is either a surface formed by cutting one side of the width direction XX of the narrow width portion 101 or a surface formed by cutting the other side of the width direction XX of the narrow width portion 101. However, the present invention is not limited to this. In this embodiment 8, a case is described in which the surface formed by cutting one side of the width direction of the narrow width portion is set as the first surface, the surface formed by cutting the other side of the width direction of the narrow width portion is set as the second surface, and either surface is formed at a position different from the outermost peripheral surface 102 of the product 100.

[0246] First, in Figure 69 and Figure 70 , the relationship between the material 600, the product 100, and the narrow width portion 101 will be described. Figure 69 It is a plan view showing the structure of a product manufactured by the press device of the eighth embodiment. Figure 70 Yes Figure 69The same parts as those in the above-mentioned embodiments are denoted by the same reference numerals and their descriptions are omitted.

[0247] Will Figure 70 In the cross section shown, the direction of width W2, which is smaller than the plate thickness T1 of material 600 in narrow width portion 101, is described as width direction XXX. Therefore, width direction XXX represents a portion of the planar direction of material 600. A first hole 121 and a second hole 122 are formed as holes for forming narrow width portion 101 of product 100. The portion of narrow width portion 101 formed by first hole 121 is the first surface 111, formed by cutting along one side of width direction XXX. The portion formed by second hole 122 is the second surface 112, formed by cutting along the other side of width direction XXX.

[0248] Then, based on Figures 71 to 81 , a method for manufacturing a product using a punching device of embodiment 8 having the same structure as the above-mentioned embodiments will be described. First, similarly to embodiment 1, Figure 5 and Figure 6 As shown, the blanking return process is performed to form the outermost peripheral surface 102 of the product 100. Then, Figure 5 In the blanking return process, the product 100 is not fully returned to the same position as the material 600, so next, as Figure 7 and Figure 8 As shown, a punching process is performed to embed the product 100 in the material 600.

[0249] Then, if Figure 71 and Figure 72 As shown, a punching return process is performed to form the first hole portion 121. Figure 71 It is a plan view showing a state after the first hole portion 121 is formed. Figure 72 yes Figure 71 The cross-sectional view of the punching return process of the first hole portion 121 at the BB line cross section is shown. Figure 72 As shown, a punch 211 is positioned on the upper side Y1 of a material 600, and a support member 311 having the same planar shape as the punch 211 is positioned from the lower side Y2 of the material 600. While the material 600 is being held between the punch 211, the punch 211 is used to perform blanking, thereby forming a first hole 121 in the product 100. The first hole 121 includes the first surface 111 of the narrow width portion 101.

[0250] Furthermore, at this time, a stripper plate 411 is arranged around the punch 211 on the upper side Y1 of the material 600, and a die 511 having the same planar shape as the stripper plate 411 is arranged on the lower side Y2 of the stripper plate 411, which is opposite to the material 600. Therefore, the material 600 outside the first hole 121 is clamped and fixed by the stripper plate 411 and the die 511.

[0251] In this process, a first hole portion 121 having the first surface 111 of the narrow portion 101 is formed. Thus, the first hole portion 121 is formed while the first surface 111 of the narrow portion 101 is fixed by the punch 211 and support member 311, the stripper plate 411 and the die 511, and the material 600 clamped by the stripper plate 411 and the die 511, by clamping the upper surface Y1 and the lower surface Y2 of the narrow portion 101. Therefore, the first surface 111 of the narrow portion 101 is formed while being restrained from moving in a planar direction. This prevents deformation and edge collapse of the narrow portion 101.

[0252] and, Figure 71 The relationship between the material 600 and the first hole waste 611 when the process is completed is similar to the above-mentioned embodiments, in which the support member 311 pushes back the punched first hole portion 121, so that the punched first hole waste 611 is embedded in the original material 600 by at least 20% of the plate thickness. Figure 71 In the punching return process, the first hole waste 611 may not be fully returned to the same position as the material 600, so next, as Figure 73 and Figure 74 As shown, a punching process is performed to embed the first hole waste 611 into the material 600.

[0253] Figure 73 1 is a top view showing a state after the first hole waste 611 is punched into the material 600 . Figure 74 yes Figure 7 The cross-sectional view of the BB line section showing the flattening process. Figure 74 As shown, the first hole waste 611 is clamped by using the stripper plate 401 having a flat surface in the plane direction and the die 501, and the first hole waste 611 is embedded back into the original position in the first hole portion 121 of the material 600. Figure 73 As shown, first hole slug 611 is embedded back into material 600 .

[0254] Then, if Figure 75 and Figure 76 As shown, a hole machining step of forming the second hole portion 122 is performed. Figure 75 It is a plan view showing a state after the second hole portion 122 is formed. Figure 76 yes Figure 75The cross-sectional view of the hole machining process of the second hole portion 122 at the BB line cross section is shown. Figure 76 As shown, punch 212 is positioned on upper side Y1 of material 600, into which first hole scrap 611 is embedded. Punch 212 then punches material 600, forming second hole portion 122 of product 100. This second hole portion 122 includes second surface 112 of narrow width portion 101. Furthermore, second hole scrap 612 released from second hole portion 122 is ejected into die 512.

[0255] Furthermore, at this time, a stripper plate 412 is disposed around the punch 212 on the upper side Y1 of the material 600 into which the first hole scrap 611 is embedded. A die 512 having the same planar shape as the stripper plate 412 is disposed on the lower side Y2 of the stripper plate 412, opposite the material 600 into which the first hole scrap 611 is embedded. Therefore, the product 100, the first hole scrap 611, and the material 600 outside the product 100 are clamped and fixed by the stripper plate 412 and the die 512.

[0256] In this process, a second hole portion 122 is formed, which has the second surface 112 of the narrow portion 101. Thus, the second hole portion 122 is formed while the first surface 111 and the second surface 112 of the narrow portion 101 are fixed by the punch 212, the stripper plate 412, the die 512, and the product 100 and the material 600, which are clamped by the stripper plate 412 and the die 512 and have the first hole scrap 611 embedded therein. Consequently, the narrow portion 101 is formed while being restrained from moving in a planar direction. This prevents deformation and edge collapse of the narrow portion 101.

[0257] Next, in order to discharge the first hole waste 611 embedded in the product 100, the support is removed, such as Figure 77 and Figure 78 As shown, the hole dropping process is carried out. Figure 77 It is a plan view showing a state where the first hole scrap 611 has fallen from the product 100 . Figure 78 yes Figure 77 The cross-sectional view of the hole dropping process at the BB line section of FIG. Figure 78 As shown, the punch 213 having a flat surface in the plane direction is used to press down the first hole waste 611 embedded back into the product 100 , so that the first hole waste 611 is separated from the product 100 and discharged into the die 511 .

[0258] Next, in order to discharge and stack the product 100, the support is removed, such as Figure 79 and Figure 80 As shown, the dropping process is performed. Figure 79 It is a plan view showing a state where the product 100 has fallen from the material 600 . Figure 80yes Figure 79 The sectional view of the BB line section showing the falling process. Figure 80 As shown in FIG. 1 , the punch 202 having a flat surface in the plane direction is used to press the product 100 downward, so that the product 100 is separated from the material 600 and discharged into the die 500. Figure 79 As shown, product 100 is formed from material 600 .

[0259] The narrow width portion 101 of the product 110 manufactured through the above process is characterized in that Figure 81 As shown, burrs or traces of burrs being flattened are observed on the lower side Y2 of the first surface 111 of the narrow portion 101. Furthermore, edge collapse is characteristically observed on the upper side Y1 of the first surface 111 and on both the upper side Y1 and lower side Y2 of the second surface 112. The burrs and edge collapse shown here do not indicate defects but rather represent characteristic appearances resulting from this manufacturing process.

[0260] The press device of the eighth embodiment configured as described above achieves the same effects as those of the above-described embodiments, and enables stable production even if the first and second surfaces of the narrow width portion are not the outermost peripheral surfaces.

[0261] Implementation method 9.

[0262] In this embodiment 9, unlike the above-mentioned embodiment 1, based on Figures 83 to 97 The following describes a method in which a portion of the entire circumference of the outermost circumference 102 of the product 100 is punched out, followed by the entire circumference of the outermost circumference 102 of the product 100. The same reference numerals are used for the same parts as in the above-described embodiments. In the figures, the direction of the cross-section along the line CC in the longitudinal direction Z is referred to as the longitudinal direction ZZ, and the direction of the cross-section along the line DD in the longitudinal direction Z is referred to as the longitudinal direction ZZZ. Therefore, the longitudinal direction ZZ and the longitudinal direction ZZZ represent portions of the planar direction of the material 600.

[0263] First, if Figures 83 to 85 As shown, a half blanking step is performed for blanking a portion of the material 600 in the plate thickness direction Y along a portion of the entire circumference of the outermost peripheral surface 102 of the product 100 using the punch 214 . Figure 83 The figure shows a state where a half-blanking process is performed on a portion of the entire circumference of the outermost peripheral surface 102 of the product 100 in the material 600 . Figure 84 yes Figure 83 A cross-sectional view showing the half blanking process at the CC line section. Figure 85 yes Figure 83 A cross-sectional view showing the half blanking process at the DD line section. Figure 83The portion of the outermost peripheral surface 102 indicated by the solid line represents a portion that has been half-blanked, and the portion where the solid line is interrupted represents a portion of the outermost peripheral surface 102 that has not been half-blanked. Figure 84 represents the half-punched portion of the outermost peripheral surface 102, Figure 85 The portion of the outermost peripheral surface 102 that has not been half-blanked is shown.

[0264] like Figure 84 and Figure 85 As shown, the punch 214 is positioned on the upper side Y1 of the material 600, and the support 312 is positioned on the lower side Y2 of the material 600. While sandwiching the material 600, the punch 214 performs a semi-blanking operation, shearing a portion of the product 100's outermost surface 102 in the thickness direction Y to approximately 80% of the thickness along a portion of the entire circumference. Therefore, the material 600 is not completely sheared along a portion of the entire circumference of the product 100's outermost surface 102. This semi-blanked portion of the outermost surface 102 includes the first surface 111 of the narrow width portion 101. At this time, the support 312 presses the material 600 toward the upper side Y1 against the punch 214 with a force greater than 50% of the shear load of the material 600. The blanking process is performed while the portion of the material 600 that will become the product 100 is sandwiched between the punch 214 and the support 312. This prevents warping of the product 100 and prevents the occurrence of edge collapse.

[0265] Furthermore, at this time, the stripper plate 400 is arranged around the punch 214 on the upper side Y1 of the material 600, and the die 500 having the same planar shape as the stripper plate 400 is arranged on the lower side Y2 opposite to the stripper plate 400 across the material 600. Therefore, the material 600 on the outer side of the product 100 is clamped and fixed by the stripper plate 400 and the die 500.

[0266] Furthermore, as previously mentioned, in this process, a portion of the outermost circumference 102 of the first surface 111 having the narrowed portion 101 is half-blanked to approximately 80% of its circumference in the plate thickness direction Y. This prevents the punch 214 from moving to a point where it contacts the die 500. Consequently, the difference between the outer dimensions of the punch 214 and the inner diameter of the die 500 can be kept to zero or less, further suppressing the occurrence of edge collapse in the material 600.

[0267] In addition, a portion of the entire circumference of the outermost peripheral surface 102 is in a state of being fixed by the punch 214 and the support member 312, the stripper plate 400 and the die 500, and the material 600 clamped by the stripper plate 400 and the die 500, so that the movement of a portion of the entire circumference of the outermost peripheral surface 102, that is, the first surface 111 of the narrow width portion 101 in the planar direction is suppressed.

[0268] Furthermore, in this process, as previously described, a portion of the outermost peripheral surface 102 is formed in a partially uncut state in the planar direction. Thus, in this ninth embodiment, a portion of the material 600 is not cut and retained, and only the target portion is cut, without forming the entire outermost peripheral surface 102 of the product 100. Therefore, in the aforementioned embodiments in which the outermost peripheral surface 102 of the product 100 is punched out at once, there is a possibility of displacement during the process because the product 100 is moved between processes while being pressed in. However, in this ninth embodiment, by cutting a portion of the entire circumference of the outermost peripheral surface 102 and leaving a portion connected to the material 600 without cutting, the possibility of displacement is eliminated, resulting in a stable dimension.

[0269] and, Figure 83 The relationship between the material 600 and the product 100 when the process is completed is as follows Figure 84 As shown (for example, referring to embodiment 6 Figure 49 ), through the half-blanking process, the product 100 is connected to the original material 600 with more than 20% of the plate thickness.

[0270] Further details are given. Figure 86 214, support 312, die 500 and material 600 for forming the punch 214. Figure 86 The actual stripper plate 400 is omitted for illustration in order to show the detailed shape of the punch 214. The punch 214 and the support 312 perform half blanking on a portion of the entire circumference of the outermost peripheral surface 102, so that Figure 86 As shown, the punch 214 has a cutout portion 244 having a shape obtained by cutting out the portion that is not half-blanked. Figure 87 A. Figure 87 As shown in B, Figure 86 The CC and DD lines correspond to which positions of the shape of the punch 214. The CC line cross section shows the position of a portion of the perfect circular cylindrical shape of the punch 214, and the DD line cross section shows the position after a portion of the perfect circular shape is cut away.

[0271] and, Figure 84 and Figure 85 FIG. 2 shows the behavior of the material 600 when the punch 214 reaches the bottom dead center. Figure 85 As shown, in the DD line cross section, a portion of the material 600 is not sheared due to the wide tool gap of the punch 214, and only the material 600 is stretched. Figure 84 As shown, only the target portion (a portion of the entire circumference of the outermost peripheral surface 102) is half-blanked as shown in the CC line cross section. As a result, the entire circumference of the outermost peripheral surface 102 of the product 100 is not half-blanked, and a portion remains.

[0272] Then, if Figures 88 to 90 As shown, a punching process is performed to embed the product 100 in the material 600. Figure 88 It is a top view showing the state after the product 100 is flattened into the material 600. Figure 89 yes Figure 88 A cross-sectional view showing the punching process at the CC line section. Figure 90 yes Figure 88 A cross-sectional view showing the punching process at the DD line section. Figure 88 The portion of the outermost peripheral surface 102 indicated by the solid line represents a cut portion, and the portion where the solid line is interrupted represents an uncut portion of the entire circumference of the outermost peripheral surface 102 . Figure 89 represents the punched portion of the outermost peripheral surface 102, Figure 90 The portion of the outermost peripheral surface 102 that has not been punched out is shown.

[0273] like Figure 89 and Figure 90 As shown in FIG, by using the stripper plate 401 having a flat surface in the plane direction and the die 501 to clamp the product 100, the product 100 is embedded back into the original position of the material 600. Figure 89 and Figure 90 As shown, the product 100 is embedded back into the material 600. In this process, about 20% of the entire circumference of the outermost surface 102 of the first surface 111 having the narrow width portion 101 is returned to its original position. Figure 89 As shown, a portion of the entire circumference of the outermost circumference 102 of the product 100 is completely cut off. Therefore, a portion of the entire circumference of the outermost circumference 102 of the product 100 forms a collapsed edge on both the upper side Y1 and the lower side Y2 (for example, refer to the sixth embodiment). Figure 52 However, in this process, as in the previous process ( Figures 83 to 85 The portions other than the portion that is not half-punched in the step shown in FIG. 1 and the portion of the entire circumference of the outermost peripheral surface 102 are not cut and are in a connected state.

[0274] Then, if Figures 91 to 93 As shown, a hole machining step of forming the hole portion 120 is performed. Figure 91 It is a plan view showing a state after the hole portion 120 is formed. Figure 92 yes Figure 91 AA line cross-sectional view showing the hole machining process of the hole portion 120. Figure 93 yes Figure 91 DD line cross section is a cross-sectional view showing a hole machining step of the hole portion 120 . Figure 91The portion of the outermost peripheral surface 102 indicated by the solid line represents a cut portion, and the portion where the solid line is interrupted represents an uncut portion of the outermost peripheral surface 102 . Figure 92 represents the punched portion of the outermost peripheral surface 102, Figure 93 The portion of the outermost peripheral surface 102 that has not been punched out is shown.

[0275] like Figure 92 As shown, the punch 201 is placed on the upper side Y1 of the material 600. Then, the material 600 is punched by the punch 201 to form the hole 120 of the product 100. The hole 120 includes the second surface 112 of the narrow width portion 101. In addition, the hole waste 601 separated from the hole 120 is discharged into the die 502. Figure 93 The part shown in the DD line section is relative to Figure 90 The status shown does not change.

[0276] Furthermore, at this time, a stripper plate 402 is arranged around the punch 201 on the upper side Y1 of the material 600, and a die 502 having the same planar shape as the stripper plate 402 is arranged on the lower side Y2 opposite to the stripper plate 402 across the material 600. Therefore, the product 100 and the material 600 outside the product 100 are clamped and fixed by the stripper plate 402 and the die 502.

[0277] In this process, a hole portion 120 is formed on the second surface 112 of the narrow width portion 101. Thus, the hole portion 120 is formed by clamping the upper side Y1 and lower side Y2 surfaces of the narrow width portion 101, and then using the punch 201, the stripper plate 402, the die 502, and the material 600 clamped by the stripper plate 402 and the die 502 to fix the first surface 111 and the second surface 112 of the narrow width portion 101. Therefore, the narrow width portion 101 is formed while being prevented from moving in a planar direction. This prevents deformation and edge collapse of the narrow width portion 101.

[0278] exist Figure 91 In the process, the hole portion 120 is punched out, and the product 100 having completed the formation of the narrow width portion 101 is embedded and pressed into the material 600. However, at this stage, a portion of the outermost peripheral surface 102 of the product 100 is not cut. Therefore, in order to cut off the portion of the outermost peripheral surface 102 of the product 100 that is not cut and discharge the stack, the support member is removed, such as Figures 94 to 96 As shown, the cutting and dropping process is performed.

[0279] Figure 94 This is a plan view showing a state in which a portion of the outermost peripheral surface 102 that has not been cut from the material 600 is cut and the product 100 is dropped. Figure 95 yes Figure 94A cross-sectional view showing the cutting and dropping process at the AA line section. Figure 96 yes Figure 94 The sectional view of the DD line section showing the cutting and dropping process. Figure 95 and Figure 96 As shown, a punch 200 having a flat surface in the plane direction is used to cut off a portion of the uncut outermost peripheral surface 102 and press the product 100 downward, so that the product 100 is separated from the material 600 and discharged into a die 500 different from the die originally used to form the product 100. Figure 94 As shown, product 100 is formed from material 600 .

[0280] The narrow width portion 101 of the product 110 manufactured through the above process is characterized in that Figure 97 As shown in A, in the portion corresponding to the cross section along line AA, collapsed edges are observed on the upper side Y1 and the lower side Y2 of the first surface 111 of the narrow width portion 101. In addition, burrs are observed on the lower side Y2 of the second surface 112. Figure 97 As shown in B, burrs are observed on the upper side Y1 of the outermost peripheral surface 102 in a portion corresponding to the cross section along the line DD along the outermost peripheral surface 102. The burrs and collapsed edges shown here do not indicate defects but rather represent a characteristic appearance structure based on this process.

[0281] Thus, in the ninth embodiment, after a portion of the entire circumference of the outermost peripheral surface 102 of the product 100 is subjected to the half-blanking return process, a flattening process is performed, and then a hole processing process is performed to form the hole portion 120 inside the product 100, and the product 100 is manufactured by cutting and dropping. Therefore, the product 100 can be manufactured in four steps. In contrast, in the comparative example, as Figure 82 A, B → Figure 82 C, D → Figure 82 E, F → Figure 82 G, H → Figure 82 As shown in I and J, the product is manufactured in a minimum of five steps. Therefore, the number of steps can be reduced in the ninth embodiment compared to the comparative example. Furthermore, the material yield rate is improved according to the ninth embodiment.

[0282] In the ninth embodiment, the punch 214 is provided with the cutout 244 to cope with the problem. However, the present invention is not limited thereto and, for example, a punch 214 without the cutout 244 may be used. Alternatively, a die 500 with the cutout 244 may be used to cope with the problem.

[0283] Specifically, Figure 102 The structure of the punch 214, the die 500 and the material 600 is shown. Figure 102In order to show the detailed shape of the punch 214 and the die 500, the actual stripper plate 400 and the support member 312 are omitted in the figure. When the punch 214 is used for blanking, in order to perform half blanking on a portion of the entire circumference of the outermost peripheral surface 102, as shown in FIG. Figure 102 As shown, the die 500 has a cutout portion 244 having a shape obtained by cutting out the portion that is not half-blanked. Figure 103 A. Figure 103 FIG. 2B shows the positions of the cross-sections along lines CC and DD corresponding to the shape of the die 500. The cross-section along line CC represents the position of a portion of the perfectly circular cylindrical hole of the die 500, while the cross-section along line DD represents the position after a portion of the perfectly circular cylindrical hole has been cut away. Using the die 500 having the cutout portion 244, the same formation as in the ninth embodiment can be achieved.

[0284] The punching device of embodiment 9 constructed as described above has the same effect as the above-mentioned embodiments, and, when the surface formed by cutting one side of the width direction of the narrow width portion is set as the first surface, and the surface formed by cutting the other side of the width direction of the narrow width portion is set as the second surface, and the outermost peripheral surface formed by cutting the product has the first surface of the narrow width portion, after the punch half-punches a part of the entire circumference of the outermost peripheral surface of the product, the support is configured to embed the outermost peripheral surface punched out by the punch back into the material, and through the stripping The material plate and the die will embed the outermost peripheral surface after half-punching by the punch back into the material, and a part of the entire circumference of the outermost peripheral surface that has been embedded back will be cut off in the direction of the plate thickness, and the stripping plate and the die will press the narrow width portion on the inner circumference side of the outermost peripheral surface and the material on the outer circumference side of the outermost peripheral surface. The punch is configured to punch out the second surface of the narrow width portion. After the punch punches out the second surface of the narrow width portion, the punch punches out the entire circumference of the outermost peripheral surface, thereby reliably ensuring the strength of the narrow width portion.

[0285] Implementation method 10.

[0286] In this tenth embodiment, unlike the first embodiment, the case where the hole portion 120 of the product 100 is formed first and the outermost peripheral surface 102 is formed later, as in the fourth embodiment, will be described. The same reference numerals are used to designate the same parts as those in the above embodiments. The description will focus on the parts that differ from those in the above embodiments.

[0287] First, similarly to the above-mentioned embodiment 4, Figures 28 to 35 The process shown, such as Figure 34 and Figure 35As shown, the hole portion 120 and the outermost peripheral surface 102 of the product 100 are formed, and the product 100 with the hole scrap 601 embedded back is in a state of being embedded back into the material 600.

[0288] Next, in order to discharge and stack a plurality of products 100 in which the hole waste 601 is embedded, the support member is removed, such as Figure 98 and Figure 99 As shown, the dropping process is performed. Figure 98 It is a plan view showing a state in which the product 100 with the hole scrap 601 re-embedded has fallen from the material 600 . Figure 99 yes Figure 98 The sectional view of the AA line section showing the falling process. Figure 99 As shown, the punch 202 having a flat surface in the plane direction presses down the product 100 with the hole waste 601 embedded therein, so that the product 100 with the hole waste 601 embedded therein is separated from the material 600 and discharged into the die 500. Thus, the product 100 with the hole waste 601 embedded therein is stacked in the die 500. Figure 98 As shown, the product 100 is formed from the material 600 with the hole waste 601 embedded therein.

[0289] Next, in order to discharge the hole waste 601 of the plurality of products 100 in which the hole waste 601 is embedded, the support member is removed, such as Figure 100 and Figure 101 As shown, the hole dropping process is carried out. Figure 100 It is a plan view showing a state where the hole scrap 601 has fallen from the product 100 . Figure 101 yes Figure 100 The cross-sectional view of the hole dropping process at the AA line section of FIG. Figure 101 As shown, the punch 215 having a flat surface in the plane direction is used to press down the hole waste 601 embedded in the product 100 from the multiple stacked products 100, so that the hole waste 601 is separated from the multiple stacked products 100 and discharged into the die 513. Figure 101 As shown, the stripper plate 413 is configured to cover the upper surface and the hole portion 120 on the side of the product 100. Figure 100 As shown, a plurality of products 100 are formed from a material 600 .

[0290] The characteristics of the narrow width portion 101 of the product 110 manufactured through the above steps can be compared with those of the fourth embodiment. Figure 40 A is obtained in the same way.

[0291] The stamping device of embodiment 10 constructed as described above has the same effect as the above-mentioned embodiments, and, when the surface formed by cutting one side of the width direction of the narrow width portion is set as the first surface, and the surface formed by cutting the other side of the width direction of the narrow width portion is set as the second surface, and the outermost peripheral surface formed by cutting the product has the first surface of the narrow width portion, after the punch punches the second surface of the narrow width portion, the stripper plate and the die are configured to embed the second surface punched by the punch back into the material and punch the outermost peripheral surface of the product. After stacking a plurality of punched products, all the second surfaces of the narrow width portions of the plurality of products are punched out, thereby reliably ensuring the strength of the narrow width portion and efficiently manufacturing a plurality of products.

[0292] Here, main uses of each punch, support, stripper plate, and die used in each of the above-mentioned embodiments are shown.

[0293] The punch 200 is a first punch for cutting for punching out the outermost peripheral surface 102 of the product 100 from the material 600 .

[0294] The punch 201 is a second punch for cutting for punching out the hole 120 from the material 600 (product 100 ).

[0295] The punch 202 is a third punch for pressing to separate the outermost peripheral surface 102 of the product 100 from the material 600 .

[0296] The punch 215 is a fourth punch for pressing to separate the hole scrap 601 from the material 600 (product 100 ).

[0297] The punch 210 is a fifth punch for cutting to half-blank the outermost peripheral surface 102 of the product 100 from the material 600 in the plate thickness direction Y.

[0298] The punch 203 is a sixth punch for cutting, which is used to punch out the material 600 while leaving a portion 666 of the outermost peripheral surface 102 of the product 100 .

[0299] The punch 211 is a seventh punch for cutting for punching out the first hole portion 121 from the material 600 (product 100 ).

[0300] The punch 212 is an eighth punch for cutting for punching out the second hole portion 122 from the material 600 (product 100 ).

[0301] The punch 213 is a ninth punch for pressing to separate the first hole scrap 611 from the material 600 (product 100 ).

[0302] The punch 214 is a tenth punch for cutting that performs half blanking in the plate thickness direction Y while leaving a portion of the outermost peripheral surface 102 of the product 100 .

[0303] The support 300 is a first support of the punch 200 or the punch 210 .

[0304] The support 301 is a second support for the punch 201 .

[0305] The support 303 is a third support for the punch 203 .

[0306] The support member 311 is a fourth support member of the punch 211 .

[0307] The support 312 is a fifth support for the punch 214 .

[0308] In addition, each support member also has the function of fitting the portion punched out by the punch back to its original position.

[0309] The stripper plate 400 and the die 500 are a first stripper plate and a first die for clamping the material 600 outside the outermost peripheral surface 102 of the product 100 .

[0310] However, as described in the above embodiments, the die 500 may include a die 500 used in the manufacturing stage of the product 100 and a different die 500 used to finally separate the product 100 from the material 600 and store the product 100. Therefore, the different die 500 for storing the product 100 is distinguished from the first die and is the seventh die.

[0311] The stripper plate 401 and the die 501 are a second stripper plate and a second die for holding the entire surface of the material 600 (product 100 ).

[0312] The stripper plate 402 and the die 502 are a third stripper plate and a third die for holding the material 600 (product 100 ) other than the hole portion 120 .

[0313] The stripper plate 411 and the die 511 are a fourth stripper plate and a fourth die for holding the material 600 (product 100 ) other than the first hole portion 121 .

[0314] The stripper plate 412 and the die 512 are a fifth stripper plate and a fifth die for holding the material 600 (product 100 ) other than the second hole portion 122 .

[0315] The stripper plate 413 and the die 513 are a sixth stripper plate and a sixth die for holding the product 100 excluding the hole portion 120 .

[0316] The present disclosure describes various exemplary embodiments and examples, but various features, modes, and functions described in one or more embodiments are not limited to application in specific embodiments and can be applied to the embodiments alone or in various combinations.

[0317] Therefore, numerous modifications not shown in the examples are conceivable within the scope of the presently disclosed technology, including, for example, modifying, adding, or omitting at least one component, and extracting at least one component and combining it with components from other embodiments.

[0318] Hereinafter, various aspects of the present disclosure are collectively described as supplementary notes.

[0319] (Note 1)

[0320] A punching device, which punches out materials to produce products, wherein

[0321] In the punching of the narrow portion of the product formed with a width smaller than the plate thickness of the material,

[0322] The punching device performs punching while suppressing movement of the narrow width portion in a planar direction.

[0323] (Note 2)

[0324] The punching device according to Supplementary Note 1, wherein:

[0325] The punching device comprises a punch, a support, a stripper plate and a die.

[0326] The punch and the support are arranged to face each other vertically with the material sandwiched therebetween.

[0327] The stripper plate and the punching die are arranged to face each other vertically with the material sandwiched therebetween, and

[0328] The punch, the support, the stripper plate, and the die are arranged at positions that suppress movement of the narrow width portion in a planar direction.

[0329] (Note 3)

[0330] The punching device according to Supplementary Note 2, wherein:

[0331] The stripper plate and the die are configured to return the portion blanked out by the punch to the material.

[0332] (Note 4)

[0333] The punching device according to Supplement 2 or 3, wherein:

[0334] In the case where a surface formed by cutting one side of the narrow width portion in the width direction is defined as a first surface, and a surface formed by cutting the other side of the narrow width portion in the width direction is defined as a second surface, and the first surface and the second surface are punched in different steps,

[0335] The punch includes a protrusion that abuts against the first surface or the second surface that is punched out first.

[0336] (Note 5)

[0337] The punching device according to Supplement 2 or 3, wherein:

[0338] In the case where a surface formed by cutting one side of the narrow width portion in the width direction is defined as a first surface, and a surface formed by cutting the other side of the narrow width portion in the width direction is defined as a second surface, and the first surface and the second surface are punched in different steps,

[0339] The support member includes a protrusion that abuts against the first surface or the second surface that is punched out first.

[0340] (Note 6)

[0341] The punching device according to any one of Supplementary Notes 2 to 5, wherein:

[0342] In the case where the surface formed by cutting one side of the narrow width portion in the width direction is defined as the first surface, and the surface formed by cutting the other side of the narrow width portion in the width direction is defined as the second surface, and the outermost peripheral surface formed by cutting the product has the first surface or the second surface of the narrow width portion,

[0343] The punch is configured to punch out the first surface or the second surface of the narrow width portion after punching out the outermost peripheral surface of the product.

[0344] (Note 7)

[0345] The punching device according to any one of Supplementary Notes 2 to 6, wherein:

[0346] The support is configured to press the material against the punch.

[0347] (Note 8)

[0348] The punching device according to any one of Supplementary Notes 2 to 7, wherein:

[0349] The die includes a protruding portion that protrudes along a planar direction of the narrow width portion.

[0350] (Note 9)

[0351] A method for manufacturing an iron core, wherein:

[0352] Using the punching device described in any one of Supplementary Notes 1 to 8,

[0353] The product obtained by punching the material is manufactured as an iron core of a rotating electrical machine.

[0354] (Note 10)

[0355] A method for manufacturing a rotating electrical machine, wherein:

[0356] A rotating electrical machine is manufactured using the iron core manufactured by the method for manufacturing an iron core described in Supplementary Note 9.

[0357] Label Description

[0358] 1: Rotating electric machine, 10: Rotor magnet, 11: Magnetic flux barrier, 12: Narrow portion, 100: Product, 101: Narrow portion, 102: Outermost peripheral surface, 103: Upper surface, 104: Lower surface, 111: First surface, 112: Second surface, 120: Hole, 121: First hole, 122: Second hole, 2: Outer frame, 3: Stator core sheet, 30: Stator core, 4 : Rotor core, 40: Core, 5: Shaft, 6: Core back, 7: Teeth, 8: Fitting portion, 9: Coil, 200: Punch, 201: Punch, 202: Punch, 203: Punch, 210: Punch, 211: Punch, 212: Punch, 213: Punch, 214: Punch, 215: Punch, 222: Protrusion, 244: Cutout, 300: Support, 30 1: support member, 303: support member, 311: support member, 312: support member, 333: protrusion, 400: stripper plate, 401: stripper plate, 402: stripper plate, 411: stripper plate, 412: stripper plate, 413: stripper plate, 500: die, 501: die, 502: die, 511: die, 512: die, 513: die, 555: protrusion, 600: material, 601: hole waste, 666: part, 611: first hole waste, 612: second hole waste, 701: first burr, 702: second burr, H1: height, H2: height, X: horizontal direction, XX: width direction, XXX: width direction, Y: plate thickness direction, Y1: upper side, Y2: lower side, Z: longitudinal direction, ZZ: longitudinal direction, ZZZ: longitudinal direction.

Claims

1. A punching device for punching a material to produce a product, wherein: In the punching of the narrow portion of the product formed with a width smaller than the plate thickness of the material, The punching device performs punching while suppressing movement of the narrow width portion in a planar direction.

2. The punching device according to claim 1, wherein: The punching device comprises a punch, a support, a stripper plate and a die. The punch and the support are arranged to face each other vertically with the material sandwiched therebetween. The stripper plate and the punching die are arranged to face each other vertically with the material sandwiched therebetween, and The punch, the support, the stripper plate, and the die are arranged at positions that suppress movement of the narrow width portion in a planar direction.

3. The punching device according to claim 2, wherein: The stripper plate and the die are configured to return the portion blanked out by the punch to the material.

4. The punching device according to claim 2 or 3, wherein: In the case where a surface formed by cutting one side of the narrow width portion in the width direction is defined as a first surface, and a surface formed by cutting the other side of the narrow width portion in the width direction is defined as a second surface, and the first surface and the second surface are punched in different steps, The punch includes a protrusion that abuts against the first surface or the second surface that is punched out first.

5. The punching device according to claim 2 or 3, wherein: In the case where a surface formed by cutting one side of the narrow width portion in the width direction is defined as a first surface, and a surface formed by cutting the other side of the narrow width portion in the width direction is defined as a second surface, and the first surface and the second surface are punched in different steps, The support member includes a protrusion that abuts against the first surface or the second surface that is punched out first.

6. The punching device according to any one of claims 2 to 5, wherein: In the case where the surface formed by cutting one side of the narrow width portion in the width direction is defined as the first surface, and the surface formed by cutting the other side of the narrow width portion in the width direction is defined as the second surface, and the outermost peripheral surface formed by cutting the product has the first surface of the narrow width portion, After the punch punches at least a portion of the entire circumference of the outermost peripheral surface of the product, the support member is configured to embed the outermost peripheral surface punched by the punch back into the material. After the support member embeds the outermost peripheral surface punched out by the punch back into the material, the stripper plate and the die are configured to press the narrow width portion inside the outermost peripheral surface and the material outside the outermost peripheral surface.

7. The punching device according to claim 6, wherein: When the embedded outermost surface is cut off in the direction of the plate thickness, and the stripper plate and the die press the narrow width portion on the inner side of the outermost surface and the material on the outer side of the outermost surface, the punch is configured to punch out the second surface of the narrow width portion.

8. The punching device according to any one of claims 2 to 5, wherein: In the case where the surface formed by cutting one side of the narrow width portion in the width direction is defined as the first surface, and the surface formed by cutting the other side of the narrow width portion in the width direction is defined as the second surface, and the outermost peripheral surface formed by cutting the product has the first surface of the narrow width portion, After the punch half-punches a portion of the entire circumference of the outermost peripheral surface of the product, the support member is configured to embed the outermost peripheral surface punched by the punch back into the material. The outermost peripheral surface half-punched by the punch is embedded back into the material by the stripper plate and the die, and a portion of the entire circumference of the embedded outermost peripheral surface is cut away in the plate thickness direction, and the stripper plate and the die press the narrow width portion on the inner side of the outermost peripheral surface and the material on the outer side of the outermost peripheral surface, and the punch is configured to blank the second surface of the narrow width portion. After the punch punches the second surface of the narrow width portion, the punch punches the entire circumference of the outermost peripheral surface.

9. The punching device according to any one of claims 2 to 5, wherein: In the case where the surface formed by cutting one side of the narrow width portion in the width direction is defined as the first surface, and the surface formed by cutting the other side of the narrow width portion in the width direction is defined as the second surface, and the outermost peripheral surface formed by cutting the product has the first surface of the narrow width portion, After the punch punches the second surface of the narrow width portion, the stripper plate and the die are configured to embed the second surface punched by the punch back into the material and punch the outermost peripheral surface of the product. After stacking a plurality of the punched products, all of the second surfaces of the narrow width portions of the plurality of products are punched out.

10. The punching device according to any one of claims 2 to 9, wherein: The support is configured to press the material against the punch.

11. The punching device according to any one of claims 2 to 10, wherein: The die includes a protruding portion that protrudes along a planar direction of the narrow width portion.

12. A method for manufacturing an iron core, wherein: Using the punching device according to any one of claims 1 to 11, The product obtained by punching the material is manufactured as an iron core of a rotating electrical machine.

13. A method for manufacturing a rotating electrical machine, wherein: A rotating electrical machine is manufactured using the iron core manufactured by the method for manufacturing an iron core according to claim 12 .

14. A rotating electrical machine comprising the following rotating electrical machine iron core: In a narrow portion formed on the iron core of the rotating electrical machine punched out from a material by a punching device and having a width smaller than the plate thickness of the material, When a surface formed by cutting one side of the narrow width portion in the width direction is defined as the first surface, and a surface formed by cutting the other side of the narrow width portion in the width direction is defined as the second surface, A first burr is formed on one end side of the first surface in the plate thickness direction and protrudes from one end surface of the material in the plate thickness direction. A second burr is formed on the other end side of the second surface in the plate thickness direction, protruding from the other end surface of the material in the plate thickness direction. The first burr has a trace of being flattened, A height of the first burr protruding from one end surface of the material in the plate thickness direction is smaller than a height of the second burr protruding from the other end surface of the material in the plate thickness direction.

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