Press device, method for manufacturing iron core, method for manufacturing rotary electrical machine, and rotary electrical machine

Abstract

In this press device for punching out a material (600) to manufacture a product (100), when punching out a thin-width portion (101) of the product (100), the thin-width portion (101) being formed with a width (W1) that is smaller in a width direction (XX) than a plate thickness (T1) of the material (600), the strength of the thin-width portion (101) is ensured by performing punching-out with movement suppressed in all parallel directions of the thin-width portion (101), including a planar direction, a lateral direction (X) and a longitudinal direction (Z).

Description

Pressing device, iron core manufacturing method, rotating electric machine manufacturing method, and rotating electric machine

[0001] The present disclosure relates to a press machine, a method for manufacturing an iron core, a method for manufacturing a rotating electric machine, and a rotating electric machine.

[0002] In conventional press working, for example, a mold consists only of a punch and a die used for punching. The material punched using a circular punch is returned to the original hole, and then adjacent holes are punched out and discarded. The returned material is then discarded and discarded, forming two adjacent holes in the remaining material with a width equal to or less than the plate thickness, thereby achieving thin-width punching (see, for example, Patent Document 1). Also, for example, a thin-width portion of a product is crushed and processed to be thinner than the plate thickness of the remaining portion, resulting in a product shape in which the apparent thin width dimension is greater than the plate thickness dimension (see, for example, Patent Document 2).

[0003] JP 2002-143942 A JP 2016-7136 A

[0004] Conventional press machines do not have a structure to suppress warping of the product, and generally, with such a mold configuration, the punched holes droop significantly, and after two punchings, the thickness of the thin width portion becomes significantly thinner than the original thickness, and the thin width portion falls over and twists, resulting in problems such as a decrease in the strength of the thin width portion and a deterioration in the dimensional accuracy of the product.

[0005] The present disclosure discloses technology for solving the above-mentioned problems, and aims 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 that can ensure the strength of thin-width portions.

[0006] The press apparatus disclosed herein is a press apparatus that punches out material to manufacture a product, and that, when punching out a thin portion of the product formed with a width smaller than the plate thickness of the material, suppresses movement of the thin portion in a planar direction. The iron core manufacturing method disclosed herein uses the above-described press apparatus to manufacture the product punched out of the material as an iron core for a rotating electric machine. The rotating electric machine manufacturing method disclosed herein manufactures a rotating electric machine using the iron core manufactured by the above-described iron core manufacturing method. Furthermore, the rotating electric machine of the present disclosure is provided with an iron core for a rotating electric machine that is punched out of material by a press machine and has a thin portion formed with a width smaller than the thickness of the material, wherein when a surface formed by cutting one side of the thin portion in the width direction is defined as a first surface and a surface formed by cutting the other side in the width direction is defined as a second surface, a first burr protruding from one end surface in the thickness direction of the material is formed on one end side of the first surface, and a second burr protruding from the other end surface in the thickness direction of the material is formed on the other end side of the second surface, the first burr has traces of being crushed, and the height of the first burr protruding from one end surface in the thickness direction of the material is smaller than the height of the second burr protruding from the other end surface in the thickness direction of the material.

[0007] According to the press machine, the method for manufacturing an iron core, the method for manufacturing a rotating electric machine, and the rotating electric machine of the present disclosure, the strength of the thin width portion can be ensured.

[0008] FIG. 4 is a plan view showing the configuration of a rotating electric machine using an iron core manufactured by the press apparatus according to embodiment 1. FIG. 5 is a cross-sectional view showing the configuration of the rotating electric machine shown in FIG. 1. FIG. 6 is a plan view showing the configuration of a product manufactured by the press apparatus according to embodiment 1. FIG. 7 is a cross-sectional view showing the configuration of the product shown in FIG. 3. FIG. 8 is a plan view showing a manufacturing process of the product according to embodiment 1. FIG. 9 is a cross-sectional view showing the manufacturing process of the product according to embodiment 1. FIG. 10 is a cross-sectional view showing the manufacturing process of the product according to embodiment 1. FIG. 11 is a cross-sectional view showing the manufacturing process of the product according to embodiment 1. FIG. 12 is a cross-sectional view showing the manufacturing process of the product according to embodiment 1. FIG. 13 is a cross-sectional view showing the manufacturing process of the product according to embodiment 1. FIG. 14 is an enlarged cross-sectional view showing a partial configuration of the product according to embodiment 1. FIG. 15 is a partially enlarged cross-sectional view showing the manufacturing process of the product according to embodiment 1. FIG. 16 is a plan view showing the manufacturing process of the product according to embodiment 2. FIG. 17 is a cross-sectional view showing the manufacturing process of the product according to embodiment 2. FIG. 18 is a cross-sectional view showing the manufacturing process of the product according to embodiment 2. FIG. 19 is a partially enlarged cross-sectional view showing the manufacturing process of the product according to embodiment 2. FIG. 1 is a plan view showing a manufacturing process of a product according to embodiment 3. FIG. 2 is a cross-sectional view showing a manufacturing process of a product according to embodiment 3. FIG. 3 is a cross-sectional view showing a manufacturing process of a product according to embodiment 3. FIG. 4 is a partially enlarged cross-sectional view showing a manufacturing process of a product according to embodiment 3. FIG. 5 is an enlarged cross-sectional view showing a partial configuration of a product according to embodiment 3. FIG. 6 is a plan view showing a manufacturing process of a product according to embodiment 4. FIG. 7 is a cross-sectional view showing a manufacturing process of a product according to embodiment 4. FIG. 8 is a cross-sectional view showing a manufacturing process of a product according to embodiment 4. FIG. 9 is a plan view showing a manufacturing process of a product according to embodiment 4. FIG. 10 is a cross-sectional view showing a manufacturing process of a product according to embodiment 4. FIG. 11 is a cross-sectional view showing a manufacturing process of a product according to embodiment 4. FIG. 12 is a plan view showing a manufacturing process of a product according to embodiment 4.40A is a partially enlarged cross-sectional view showing a partial configuration of the product according to embodiment 4, and FIG. 40B is a partially enlarged cross-sectional view showing a comparative example. FIG. 40B is a partially enlarged cross-sectional view showing a comparative example. FIG. 40A is a partially enlarged cross-sectional view showing a partial configuration of the product according to embodiment 4, and FIG. 40B is a partially enlarged cross-sectional view showing a comparative example. FIG. 40B is a partially enlarged cross-sectional view showing a comparative example. FIG. 40A is a partially enlarged cross-sectional view showing a partial configuration of the product according to embodiment 4, and FIG. 40B is a partially enlarged cross-sectional view showing a comparative example. FIG. 40B is a partially enlarged cross-sectional view showing a comparative example. FIG. 40B is a partially enlarged cross-sectional view showing a comparative example. FIG. 40A is a partially enlarged cross-sectional view showing a comparative example. FIG. 40B is a partially enlarged cross-sectional view showing a comparative example. 69 is a cross-sectional view showing a manufacturing process of a product according to embodiment 6. FIG. 70 is an enlarged cross-sectional view showing a partial configuration of the product according to embodiment 6. FIG. 71 is a plan view showing a manufacturing process of a product according to embodiment 7. FIG. 72 is a cross-sectional view showing a manufacturing process of a product according to embodiment 7. FIG. 73 is a perspective view showing a manufacturing process of a product according to embodiment 7. FIG. 74 is a plan view showing a manufacturing process of a product according to embodiment 7. FIG. 75 is a cross-sectional view showing a manufacturing process of a product according to embodiment 7. FIG. 76 is a cross-sectional view showing a manufacturing process of a product according to embodiment 7. FIG. 77 is a cross-sectional view showing a manufacturing process of a product according to embodiment 7. FIG. 78 is an enlarged cross-sectional view showing a partial configuration of the product according to embodiment 7. FIG. 79 is a plan view showing a configuration of a product manufactured by the press device according to embodiment 8. FIG. 79 is a cross-sectional view showing the configuration of the product shown in FIG. 69. FIG. 71 is a plan view showing a manufacturing process of a product according to embodiment 8.82A is a cross-sectional view showing a manufacturing process of a product according to embodiment 8. FIG. 82B is a cross-sectional view showing a manufacturing process of a product according to embodiment 8. FIG. 82C is a cross-sectional view showing a manufacturing process of a product according to embodiment 8. FIG. 82D is a cross-sectional view showing a manufacturing process of a product according to embodiment 8. FIG. 82E is a cross-sectional view showing a manufacturing process of a product according to embodiment 8. FIG. 82F is a cross-sectional view showing a manufacturing process of a product according to embodiment 8. FIG. 82G is a cross-sectional view showing a manufacturing process of a product according to embodiment 8. FIG. 82H is a cross-sectional view showing a manufacturing process of a product according to embodiment 8. FIG. 82I is a cross-sectional view showing a manufacturing process of a product according to embodiment 8. FIG. 82J is a cross-sectional view showing a manufacturing process of a product according to embodiment 8. 87A is a side view showing the configuration of a punch according to embodiment 9, and FIG. 87B is a plan view showing the configuration of the punch according to embodiment 9. FIG. 87B is a plan view showing the manufacturing process of a product according to embodiment 9. FIG. 87A is a side view showing the configuration of a punch according to embodiment 9, and FIG. 87B is a plan view showing the configuration of the punch according to embodiment 9. FIG. 87B is a plan view showing the manufacturing process of a product according to embodiment 9. FIG. 87A is a side view showing the configuration of a punch according to embodiment 9, and FIG. 87B is a plan view showing the configuration of a punch according to embodiment 9. FIG. 87B is a plan view showing the manufacturing process of a product according to embodiment 9. FIG. 87B is a cross-sectional view showing the manufacturing process of a product according to embodiment 9. FIG. 87A is a cross-sectional view showing the manufacturing process of a product according to embodiment 9. FIG. 87B is a cross-sectional view showing the manufacturing process of a product according to embodiment 9. FIG. 87B is a cross-sectional view showing the manufacturing process of a product according to embodiment 9. FIG. 87A is an enlarged cross-sectional view showing a partial configuration of a product according to embodiment 9, and FIG. 97B is an enlarged cross-sectional view showing another partial configuration of a product according to embodiment 9.103A is a plan view showing a manufacturing process of a product according to embodiment 10. FIG. 103B is a cross-sectional view showing a manufacturing process of a product according to embodiment 10. FIG. 103C is a perspective view showing another manufacturing process of a product according to embodiment 9. FIG. 103A is a side view showing the configuration of the die shown in FIG. 102, and FIG. 103B is a plan view showing the configuration of the die shown in FIG. 102.

[0009] The following describes embodiments of a press device according to the present disclosure. The press device described in each of the following embodiments is a press device that punches out a material to manufacture a product, and that suppresses movement of the thin portion of the product, which is formed to have a width smaller than the thickness of the material, in a planar direction.

[0010] More specifically, the press device shown in each embodiment has a punch, a backup, a stripper, and a die, the punch and the backup being arranged vertically opposite each other with the material sandwiched therebetween, the stripper and the die being arranged vertically opposite each other with the material sandwiched therebetween, and the punch, the backup, the stripper, and the die being arranged in positions that suppress movement of the thin width portion in the planar direction. Therefore, it is conceivable that multiple types of punches, backups, strippers, and dies are provided depending on the respective applications. These are the same in each of the following embodiments, so description thereof will be omitted as appropriate.

[0011] First Embodiment First, a rotating electric machine core manufactured using the press device of the present disclosure and a rotating electric machine manufactured using the core will be described with reference to Figures 1 and 2. Figure 1 is a plan view showing the configuration of a rotating electric machine using an iron core manufactured by the press device according to embodiment 1. Figure 2 is a cross-sectional view showing the configuration of the rotating electric machine shown in Figure 1.

[0012] In each drawing, a rotating electric machine 1 has an annular outer frame 2, a stator core 30 formed from a plurality of stator core pieces 3 arranged in an annular shape on the inner circumferential side of the outer frame 2, a rotor core 4 arranged with a gap between them on the inner circumferential side of the stator core 30, and a shaft 5 fastened to the center of the rotor core 4. In this rotating electric machine 1, the shaft 5 serves as the rotation axis, and the shaft 5 and rotor core 4 rotate together relative to the annular stator core 30. Hereinafter, the direction parallel to the shaft 5 will be referred to as the axial direction, the direction in which the rotor core 4 rotates will be referred to as the circumferential direction, and the direction perpendicular to the axial direction will be referred to as the radial direction.

[0013] The stator core pieces 3 include a core back 6 shaped as part of a circular ring and teeth 7 protruding inward from the core back 6, and are fixed to the outer frame 2 by fitting portions 8. Coils 9, each made of wire wound around the teeth 7, are arranged. Rotor magnets 10 are embedded circumferentially in the rotor core 4. The rotor core 4 is formed by stacking multiple iron cores 40 in the axial direction. The iron cores 40 that form the rotor core 4 have flux barriers 11 on the outer periphery that connect to the magnet holes into which the rotor magnets 10 are inserted. The outer periphery of the flux barrier 11 is provided with thin width portions 12 that are bridges with a reduced radial width to the outer periphery of the rotor core 4. The provision of these thin width portions (bridges) 12 prevents short-circuiting of magnetic flux between adjacent magnets of different poles.

[0014] The thin width portions 12 formed in the iron core 40 that forms the rotor core 4 are formed to have a width smaller than the thickness of the material used to manufacture the iron core 40, and how precisely the thin width portions 12 are manufactured while ensuring strength affects the quality of the rotating electric machine 1. Therefore, the press device of the present disclosure is used to manufacture the thin width portions 12 accurately while ensuring strength.

[0015] A method for manufacturing the punched product, iron core 40, using the press machine will be described below. Note that the shape of thin width portion 12 shown in the following description differs from the shape shown in Fig. 1, but is similar in that it has a width smaller than the thickness of the material used to manufacture iron core 40. For convenience of explanation, an example in which the shape is simplified for ease of understanding will be described.

[0016] First, in the following explanation, a portion similar to the previously shown iron core 40 will be referred to as product 100, and a portion similar to the previously shown thin portion 12 of iron core 40 will be referred to as thin portion 101. First, the relationship between material 600, product 100, and thin portion 101 will be explained with reference to FIGS. 3 and 4. FIG. 3 is a plan view showing the configuration of a product manufactured by the press apparatus according to embodiment 1. FIG. 4 is a cross-sectional view showing the configuration of the cross section of line A-A of the product shown in FIG. 3. For convenience, hatching of the portion corresponding to the cross section of product 100 is shown only in FIG. 4.

[0017] The product 100 is manufactured by punching out the material 600. The thickness direction 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. 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. Furthermore, the planar directions of the material 600 and the product 100 refer to all directions parallel to the paper surface, including the horizontal direction X and vertical direction Z in FIG. 3. Of these, the direction of width W1, which is smaller than the thickness T1 of the material 600 in the thin width portion 101 in the cross section shown in FIG. 4, will be described as the width direction XX. Therefore, the width direction XX is part of the planar directions of the material 600.

[0018] The cut surface of the outermost periphery of the product 100 is referred to as the outermost peripheral surface 102. Of the surfaces cut to form the thin width portion 101, one cut surface in the width direction XX is referred to as a first surface 111, and the other cut surface in the width direction XX is referred to as a second surface 112. In addition, the opening for forming the thin width portion 101 is referred to as a hole portion 120. The first surface 111 is part of the outermost peripheral surface 102, and the second surface 112 is part of the hole portion 120.

[0019] Furthermore, the press device of the present disclosure performs punching of the thin portion 101 while suppressing movement of the thin portion 101 in a planar direction. Specifically, the press device of the present disclosure includes a punch, a backup, a stripper, and a die. The punch and the backup are arranged facing each other above and below in the thickness direction Y, sandwiching the material 600 therebetween. The punch and the backup have the same shape in a planar view. The stripper and the die are arranged facing each other above and below in the thickness direction Y, sandwiching the material 600 therebetween. The stripper and the die have the same shape in a planar view. The punch, backup, stripper, and die are arranged in positions that suppress movement of the thin portion 101 in a planar direction.

[0020] Next, a method for manufacturing a product using the press apparatus of the first embodiment configured as described above will be described with reference to Figures 5 to 14. First, as shown in Figures 5 and 6, a punch 200 is used to punch out material 600, and a punch-back process is performed to form the outermost peripheral surface 102 of product 100. Figure 5 shows the state of material 600 after being punched out along outermost peripheral surface 102 of product 100 and then punched back. Figure 6 is a cross-sectional view taken along line A-A in Figure 5, showing the punching process.

[0021] As shown in Figure 6, a punch 200 is placed on the upper side Y1 of the material 600, and a backup 300 of the same shape as the punch 200 is placed on the lower side Y2 of the material 600 in a plane with the punch 200. With the material 600 sandwiched between them, the punch 200 punches out the material 600, forming the outermost surface 102 of the product 100. The outermost surface 102 includes the first surface 111 of the thin width portion 101. At this time, the backup 300 presses the material 600 against the punch 200 on the upper side Y1 with a force of at least 50% of the shear load of the material 600, and punching is performed with the portion of the material 600 that will become the product 100 sandwiched between the punch 200 and the backup 300. This suppresses warping of the product 100 and the occurrence of sagging.

[0022] Furthermore, at this time, the stripper 400 is disposed around the punch 200 on the upper side Y1 of the material 600, and the die 500, which has the same shape in plan view as the stripper 400, is disposed on the lower side Y2 opposite the stripper 400 across the material 600. Therefore, the material 600 on the outside of the product 100 is sandwiched and fixed by the stripper 400 and the die 500.

[0023] In this process, an outermost surface 102 is formed, which has a first surface 111 of the thin width portion 101. Therefore, the outermost surface 102 is fixed by the punch 200 and the backup 300, the stripper 400 and the die 500, and the material 600 sandwiched between the stripper 400 and the die 500, and therefore the outermost surface 102, i.e., the first surface 111 of the thin width portion 101, is prevented from moving in the planar direction.

[0024] 5 is completed, the relationship between the material 600 and the product 100 is, for example, as shown in Fig. 14, such that the punched product 100 is pushed back by the backup 300, and at least 20% of the thickness of the punched product 100 is fitted into the original material 600. As such, in the punch-back process of Fig. 5, there is a possibility that the product 100 has not sufficiently returned to the same position as the material 600, so next, as shown in Figs. 7 and 8, a flat-strike process is performed in which the product 100 is fitted into the material 600.

[0025] Fig. 7 is a plan view showing the state after the product 100 has been flattened onto the material 600. Fig. 8 is a cross-sectional view showing the flattening process along the line A-A in Fig. 7. As shown in Fig. 8, the product 100 is sandwiched between a stripper 401 and a die 501, which have flat surfaces in the planar direction, thereby fitting the product 100 back into its original position in the material 600. Then, as shown in Fig. 7, the product 100 is fitted back into the material 600.

[0026] 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 backup 300 is arranged to fit the outermost peripheral surface 102 punched out by the punch 200 back into the material 600, and after the backup 300 fits the outermost peripheral surface 102 punched out by the punch 200 back into the material 600, the stripper 400 and the die 500 are arranged to press the thin width portion 101 on the inside of the outermost peripheral surface 102 and the material 600 on the outside of the outermost peripheral surface 102. Note that the inside of the outermost peripheral surface 102 refers to the side of the material 600 on which the product 100 is formed, and the outside of the outermost peripheral surface 102 refers to the side of the material 600 on which the product 100 is not formed; these matters are the same in the following embodiments, so description thereof will be omitted as appropriate.

[0027] Next, as shown in Figures 9 and 10, a hole processing step is performed to form the hole 120. Figure 9 is a plan view showing the state after the hole 120 has been formed. Figure 10 is a cross-sectional view taken along line A-A in Figure 9, showing the hole processing step for the hole 120. As shown in Figure 10, a punch 201 is placed on the upper side Y1 of the material 600. The material 600 is then punched out by the punch 201, and the hole 120 of the product 100 is formed. The hole 120 includes the second surface 112 of the thin width portion 101. The hole waste material 601 removed from the hole 120 is discharged into the die 502.

[0028] Furthermore, at this time, a stripper 402 is arranged around the punch 201 on the upper side Y1 of the material 600, and a die 502 having the same shape in plan as the stripper 402 is arranged on the lower side Y2 opposite the stripper 402 across the material 600. Therefore, the product 100 and the material 600 outside the product 100 are sandwiched and fixed by the stripper 402 and the die 502.

[0029] In this process, a hole 120 is formed having the second surface 112 of the thin portion 101. Thus, the hole 120 is formed in a state in which the upper Y1 and lower Y2 surfaces of the thin portion 101 are sandwiched, and further, both the first surface 111 and the second surface 112 of the thin portion 101 are fixed by the punch 201, the stripper 402 and the die 502, and the material 600 sandwiched between the stripper 402 and the die 502. Thus, the thin portion 101 is formed while being prevented from moving in the planar direction. This prevents deformation and sagging of the thin portion 101.

[0030] That is, the fitted outermost surface 102 is cut off in the plate thickness direction Y, and while the stripper 402 and the die 502 press the thin width portion 101 on the inside of the outermost surface 102 and the material 600 on the outside of the outermost surface 102, the punch 201 is positioned to punch out the second surface 112 of the thin width portion 101.

[0031] In FIG. 10 , the product 100, after punching the hole 120 and completing the formation of the thin width portion 101, is fitted back into the material 600 and pressed in. Therefore, in order to eject and stack the product 100, the backup is removed and a dropping process is performed as shown in FIGS. 11 and 12 . FIG. 11 is a plan view showing the state after the product 100 has been dropped from the material 600. FIG. 12 is a cross-sectional view showing the dropping process along the line A-A in FIG. 11 . As shown in FIG. 12 , the product 100 is pressed down with a punch 202 having a flat surface in the planar direction, removing the product 100 from the material 600 and ejecting it into a die 500 different from the one used to initially form the product 100. Then, the product 100 is formed from the material 600 as shown in FIG. 11 .

[0032] The thin width portion 101 of the product 110 manufactured by the above process is characterized in that, as shown in Figure 13, burrs or traces of crushed burrs are visible on the upper side Y1 of the first surface 111 and the lower side Y2 of the second surface 112 of the thin width portion 101. Also, sagging is visible on the lower side Y2 of the first surface 111 and the upper side Y1 of the second surface 112. Note that the burrs and sagging shown here do not indicate defects, but rather indicate the characteristic appearance configuration resulting from this process.

[0033] As described above, in the first embodiment, after the punching process of the outermost peripheral surface 102 of the product 100 is performed, a flat punching process is performed, and then a hole processing process is performed to form the hole 120 inside the product 100, followed by a drop processing to manufacture the product 100. Therefore, the product 100 can be manufactured in four processes. In contrast, in the comparative example, the product was manufactured in at least five processes, as shown in Figures 82A, B → Figures 82C, D → Figures 82E, F → Figures 82G, H → Figures 82I, J. Therefore, the number of processes can be reduced in the first embodiment compared to the comparative example. Furthermore, according to the first embodiment, the material yield is improved.

[0034] The press apparatus of the first embodiment configured as described above is a press apparatus that punches out material to manufacture a product, and when punching out a thin portion of the product, which is formed with a width smaller than the thickness of the material, the punching is performed while suppressing movement of the thin portion in a planar direction. Furthermore, a method for manufacturing an iron core uses the above-described press apparatus to manufacture the product punched out of the material as an iron core for a rotating electric machine. Furthermore, a method for manufacturing a rotating electric machine uses the iron core manufactured by the above-described iron core manufacturing method to manufacture a rotating electric machine. This ensures the strength of the thin portion, making it possible to obtain an iron core with excellent precision, and ultimately a rotating electric machine with excellent quality.

[0035] Furthermore, the press device of embodiment 1 has a punch, a backup, a stripper, and a die, the punch and the backup are arranged facing each other above and below with the material in between, the stripper and the die are arranged facing each other above and below with the material in between, and the punch, the backup, the stripper, and the die are arranged in positions that suppress movement of the thin width portion in the planar direction, so that the strength of the thin width portion can be reliably ensured.

[0036] Furthermore, in the press device of embodiment 1, the surface formed by cutting one side of the thin width portion in the width direction is designated as a first surface, and the surface formed by cutting the other side in the width direction is designated as a second surface, and when the first surface or the second surface of the thin width portion is located on the outermost peripheral surface formed by cutting the product, the punch is positioned so as to punch the first surface or the second surface of the thin width portion after punching out the outermost peripheral surface of the product, thereby ensuring the strength of the thin width portion.

[0037] Furthermore, in the press device of the first embodiment, the backup is disposed so as to press the material against the punch, so that the strength of the thin width portion can be reliably ensured.

[0038] Furthermore, in the press device of embodiment 1, when the surface formed by cutting one side of the thin width portion in the width direction is designated as a first surface and the surface formed by cutting the other side in the width direction is designated as a second surface, and the first surface of the thin width portion is located on the outermost peripheral surface formed by cutting the product, after the punch punches out at least a portion of the entire circumference of the outermost peripheral surface of the product, the backup is positioned so as to fit the outermost peripheral surface punched out by the punch back into the material, and after the backup fits the outermost peripheral surface punched out by the punch back into the material, the stripper and the die are positioned so as to press the thin width portion inside the outermost peripheral surface and the material outside the outermost peripheral surface, the strength of the thin width portion can be ensured more reliably.

[0039] Furthermore, in the press device of embodiment 1, the outermost peripheral surface that has been fitted back is separated in the plate thickness direction, and the punch is positioned to punch out the second surface of the thin width portion while the stripper and the die press down on the thin width portion inside the outermost peripheral surface and the material outside the outermost peripheral surface, thereby more reliably ensuring the strength of the thin width portion.

[0040] Embodiment 2 In this embodiment 2, unlike the above-mentioned embodiment 1, a case will be described in which the hole 120 of the product 100 is formed first, and then the outermost peripheral surface 102 is formed. Note that the same parts as those in the above-mentioned embodiment 1 will be denoted by the same reference numerals. The description will focus on parts that are different from the above-mentioned embodiment 1.

[0041] First, as shown in Figures 15 and 16, a hole processing step is performed to form the hole 120. Figure 15 is a plan view showing the state after the hole 120 has been formed. Figure 16 is a cross-sectional view taken along line A-A in Figure 15, showing the hole processing step for the hole 120. As shown in Figure 16, a punch 201 is placed on the upper side Y1 of the material 600. The material 600 is then punched out by the punch 201, and the hole 120 of the product 100 is formed. The hole 120 includes the second surface 112 of the thin width portion 101. Furthermore, the waste hole material 601 removed from the hole 120 is discharged into the die 502.

[0042] Furthermore, at this time, a stripper 402 is disposed around the punch 201 on the upper side Y1 of the material 600, and a die 502 having the same shape in plan view as the stripper 402 is disposed on the lower side Y2 opposite the stripper 402 across the material 600. Therefore, the material 600 outside the hole 120 is sandwiched and fixed by the stripper 402 and the die 502.

[0043] In this process, a hole 120 is formed having the second surface 112 of the thin portion 101. Thus, the hole 120 is formed in a state in which the upper Y1 and lower Y2 surfaces of the thin portion 101 are sandwiched, and the second surface 112 of the thin portion 101 is fixed by the punch 201, the stripper 402 and the die 502, and the material 600 sandwiched between the stripper 402 and the die 502. Thus, the second surface 112 of the thin portion 101 is formed while being prevented from moving in the planar direction. This prevents deformation and sagging of the thin portion 101.

[0044] Next, as shown in Figures 17 and 18, a punching process is performed in which material 600 is punched with punch 200 to form outermost peripheral surface 102 of product 100. Figure 17 shows the state in which material 600 is punched along outermost peripheral surface 102 of product 100 to form product 100. Figure 18 is a cross-sectional view showing the punching process at the cross section of line A-A in Figure 17.

[0045] As shown in FIG. 18 , a punch 200 is placed on the upper side Y1 of the material 600, and a backup 300, which is identical in shape to the punch 200 in plan view, is placed on the lower side Y2 of the material 600. The punch 200 punches out the product 100, which is housed in a previously formed die 500, sandwiching it between the punch 200 and the product 100. The outermost peripheral surface 102 of the product 100 is then formed, and the product 100 is ejected into the die 500. At this time, the punch 200 is formed with a protrusion 222 that abuts against the second surface 112 formed on the thin portion 101. Note that FIG. 17 illustrates the planar location of the protrusion 222 for convenience. As is clear from this figure, the protrusion 222 is positioned so as to follow the second surface 112 of the thin portion 101.

[0046] Furthermore, at this time, the stripper 400 is disposed around the punch 200 on the upper side Y1 of the material 600, and the die 500, which has the same shape in plan view as the stripper 400, is disposed on the lower side Y2 opposite the stripper 400 across the material 600. Therefore, the material 600 on the outside of the product 100 is sandwiched and fixed by the stripper 400 and the die 500.

[0047] In this process, the outermost peripheral surface 102 having the first surface 111 of the thin portion 101 is formed. Therefore, the second surface 112 and the first surface 111 of the thin portion 101 are fixed by the backup 300 via the punch 200 and the formed product 100, the protrusion 222, the stripper 400 and the die 500, and the material 600 sandwiched between the stripper 400 and the die 500, thereby suppressing movement of the thin portion 101 in the planar direction. The fixed locations are indicated by bold lines in FIG. 19 , i.e., the second surface 112, the upper surface 103 on the upper side Y1 of the thin portion 101, and the lower surface 104 on the lower side Y2 of the thin portion 101. This suppresses collapse, deformation, and reduction in cross-sectional area of ​​the thin portion 101, ensuring the strength of the thin portion 101.

[0048] While FIG. 18 of the second embodiment shows an example in which the protrusion 222 is formed on the entire second surface 112 of the thin portion 101 in the thickness direction Y, this is not limiting. For example, as shown in FIG. 20 , the protrusion 222 may have a height of approximately 50% of the thickness of the thin portion 101. This is because, during punching, rotational forces are generated in the directions of arrows R1 and R2 shown in FIG. 20 , and the protrusion 222 is positioned to prevent this rotational force. Furthermore, the gap between the protrusion 222 and the thin portion 101 is permissible as long as it is equal to or less than the deflection allowance within the elastic deformation range of the thin portion 101. This allows the process of FIG. 18 to simultaneously punch out the product 100 and form the thin portion 101.

[0049] The thin width portion 101 of the product 110 manufactured by the above process is characterized in that, as shown in Figure 21, burrs or traces of crushed burrs are visible on the upper side Y1 of the first surface 111 and the lower side Y2 of the second surface 112 of the thin width portion 101. Also, sagging is visible on the lower side Y2 of the first surface 111 and the upper side Y1 of the second surface 112. Note that the burrs and sagging shown here do not indicate defects, but rather indicate the characteristic appearance configuration resulting from this process.

[0050] Furthermore, in the second embodiment, the product 100 is manufactured by performing a punching process after performing a hole processing process on the product 100, so that the product 100 can be manufactured in two processes. In contrast, the comparative example shown in Fig. 82 previously manufactured the product in five processes, so the second embodiment can reduce the number of processes compared to the comparative example. Furthermore, according to the second embodiment, the material yield is improved.

[0051] The press device of the second embodiment configured as described above achieves the same effects as the first embodiment, and in addition, when the surface formed by cutting one side of the thin width portion in the width direction is a first surface and the surface formed by cutting the other side of the width direction is a second surface, and the first surface and the second surface are punched out at different stages, the punch has a protrusion that abuts the first surface or the second surface that was punched out earlier, so that the strength of the thin width portion can be reliably ensured.

[0052] Embodiment 3. In this embodiment 3, unlike the above-mentioned embodiment 1, a case will be described in which the hole 120 of the product 100 is formed first, and the outermost peripheral surface 102 is formed later, as in the above-mentioned embodiment 2. Note that parts similar to the above-mentioned embodiments will be described with the same reference numerals. Also, the description will focus on parts different from the above-mentioned embodiments.

[0053] First, as in the second embodiment, a hole processing step for forming the hole 120 is carried out as shown in FIGS.

[0054] 22 and 23, a punching-back process is performed in which the material 600 is punched with the punch 200 to form the outermost peripheral surface 102 of the product 100. Fig. 22 shows the state in which the material 600 is punched along the outermost peripheral surface 102 of the product 100 to form the punched product 100. Fig. 23 is a cross-sectional view showing the punching process at the cross section of line A-A in Fig. 17.

[0055] As shown in Figure 23, a punch 200 is placed on the upper side Y1 of a material 600, and a backup 300 having the same shape as the punch 200 in plan view is placed on the lower side Y2 of the material 600, and the material is punched out by the punch 200. The outermost peripheral surface 102 of the product 100 is then formed. At this time, a protrusion 333 is formed on the backup 300, which abuts against the second surface 112 formed at the end of the thin width portion 101. Note that Figure 22 shows the planar location of the protrusion 333 for convenience. As is clear from this figure, the protrusion 333 is arranged so as to follow the second surface 112 of the thin width portion 101.

[0056] Furthermore, at this time, the stripper 400 is disposed around the punch 200 on the upper side Y1 of the material 600, and the die 500, which has the same shape in plan view as the stripper 400, is disposed on the lower side Y2 opposite the stripper 400 across the material 600. Therefore, the material 600 on the outside of the product 100 is sandwiched and fixed by the stripper 400 and the die 500.

[0057] In this process, an outermost surface 102 having a first surface 111 of the thin portion 101 is formed. Therefore, the second surface 112 and the first surface 111 of the thin portion 101 are fixed by the punch 200 and the backup 300, the protrusion 333, the stripper 400 and the die 500, and the material 600 sandwiched between the stripper 400 and the die 500, and thus movement of the thin portion 101 in the planar direction is suppressed.

[0058] As shown in the enlarged cross-sectional view of Figure 26, the protrusion 333 does not need to be formed on the entire second surface 112 of the thin portion 101 in the thickness direction Y, but may be formed along a height corresponding to at least 80% of the thickness of the thin portion 101. This is because, during punching, rotational forces are generated in the directions of arrows R1 and R2 shown in Figure 26, and the protrusion 333 is arranged to prevent this rotational force. Furthermore, the gap between the protrusion 333 and the thin portion 101 is permissible as long as it is equal to or smaller than the deflection allowance within the elastic deformation range of the thin portion 101. This makes it possible to suppress collapse, deformation, and reduction in cross-sectional area of ​​the thin portion 101, thereby ensuring the strength of the thin portion 101.

[0059] Then, when the process of Figure 22 is completed, the relationship between the material 600 and the product 100 is, for example, the same as in the above-mentioned embodiment 1, as shown in Figure 14, in which the punched product 100 is pushed back by the backup 300, and the punched product 100 is fitted into the original material 600 by at least 20% of the plate thickness.

[0060] Therefore, next, in order to eject and stack the product 100, the backup is removed and a dropping process is performed as shown in Figures 24 and 25. Figure 24 is a plan view showing the state after the product 100 has been dropped from the material 600. Figure 25 is a cross-sectional view showing the dropping process at the cross section of line A-A in Figure 24. As shown in Figure 25, the product 100 is pressed down with a punch 202 having a flat surface in the planar direction, removing the product 100 from the material 600 and ejecting it into the die 500. Then, the product 100 is formed from the material 600 as shown in Figure 24.

[0061] The thin width portion 101 of the product 110 manufactured by the above process is characterized in that, as shown in Figure 27, burrs or traces of crushed burrs are visible on the upper side Y1 of the first surface 111 and the lower side Y2 of the second surface 112 of the thin width portion 101. Also, sagging is visible on the lower side Y2 of the first surface 111 and the upper side Y1 of the second surface 112. Note that the burrs and sagging shown here do not indicate defects, but rather indicate the characteristic appearance configuration resulting from this process.

[0062] Furthermore, in the third embodiment, after the hole drilling process of the product 100, the punching-out process is performed, and then the dropping process is performed to manufacture the product 100, so that the product 100 can be manufactured in three processes. In contrast, the comparative example shown in Fig. 82 previously manufactured the product in five processes, so the third embodiment can reduce the number of processes compared to the comparative example. Furthermore, according to the third embodiment, the material yield is improved.

[0063] The press device of embodiment 3 configured as described above achieves the same effects as the above embodiments, and in addition, when the surface formed by cutting one side of the thin width portion in the width direction is a first surface and the surface formed by cutting the other side of the width direction is a second surface, and the first surface and the second surface are punched out at different stages, the backup has a protrusion that abuts the first surface or the second surface that was punched out earlier, so the strength of the thin width portion can be reliably ensured.

[0064] Embodiment 4. In this embodiment 4, unlike the above-mentioned embodiment 1, a case will be described in which the hole 120 of the product 100 is formed first, and the outermost peripheral surface 102 is formed later, as in the above-mentioned embodiments 2 and 3. Note that the same parts as in the above-mentioned embodiments will be described with the same reference numerals. Furthermore, the description will focus on parts that are different from the above-mentioned embodiments.

[0065] First, as shown in Figures 28 and 29, a punching and returning step is performed to form the hole 120. Figure 28 is a plan view showing the state after the hole 120 has been formed. Figure 29 is a cross-sectional view taken along line A-A in Figure 28, showing the punching and returning step for the hole 120. As shown in Figure 29, a punch 201 is placed on the upper side Y1 of the material 600, and a backup 301 having the same shape as the punch 201 is placed on the lower side Y2 of the material 600 in a planar manner. With the material 600 sandwiched between them, the punch 201 punches out the material 600, forming the hole 120 in the product 100. The hole 120 includes the second surface 112 of the thin width portion 101.

[0066] Furthermore, at this time, a stripper 402 is disposed around the punch 201 on the upper side Y1 of the material 600, and a die 502 having the same shape in plan view as the stripper 402 is disposed on the lower side Y2 opposite the stripper 402 across the material 600. Therefore, the material 600 outside the hole 120 is sandwiched and fixed by the stripper 402 and the die 502.

[0067] In this process, a hole 120 is formed having the second surface 112 of the thin portion 101. Therefore, the hole 120 is formed in a state in which the upper Y1 and lower Y2 surfaces of the thin portion 101 are sandwiched, and the second surface 112 of the thin portion 101 is fixed by the punch 201 and backup 301, the stripper 402 and die 502, and the material 600 sandwiched between the stripper 402 and die 502. Therefore, the second surface 112 of the thin portion 101 is formed while being prevented from moving in the planar direction. This prevents deformation and sagging of the thin portion 101.

[0068] Then, at the completion of the process of FIG. 28 , the relationship between the material 600 and the waste hole material 601 is, for example, similar to the above-described embodiments, in which the punched hole portion 120 is pushed back by the backup 301, and the punched waste hole material 601 is fitted into the original material 600 by at least 20% of the plate thickness. As such, in the hole punching return process of FIG. 28 , there is a possibility that the waste hole material 601 has not sufficiently returned to the same position as the material 600. Therefore, as shown in FIGS. 30 and 31 , a flat-fitting process is then performed in which the waste hole material 601 is fitted into the material 600. FIG. 30 is a plan view showing the state after the waste hole material 601 has been flat-fitted into the material 600. FIG. 31 is a cross-sectional view showing the flat-fitting process at the A-A line cross section of FIG. 30 . 31, the hole waste material 601 is sandwiched between the stripper 401 and the die 501, which have flat surfaces in the planar direction, so that the hole waste material 601 is fitted back to its original position in the hole portion 120 of the material 600. Then, as shown in FIG.

[0069] Next, as shown in Figures 32 and 33, the material 600 into which the hole waste material 601 has been fitted is punched out with a punch 200, and a punching-out process is carried out to form the outermost peripheral surface 102 of the product 100. Figure 32 shows the state in which the material 600 into which the hole waste material 601 has been fitted out has been punched out along the outermost peripheral surface 102 of the product 100 and has been subjected to a punching-out process. Figure 33 is a cross-sectional view showing the punching process at the cross section of line A-A in Figure 32.

[0070] As shown in FIG. 33 , a punch 200 is placed on the upper side Y1 of the material 600 into which the waste hole material 601 has been inserted. A backup 300 of the same shape as the punch 200 is placed on the lower side Y2 of the material 600, and the punch 200 punches out the material 600 with the waste hole material 601 inserted therein, forming the outermost peripheral surface 102 of the product 100. The outermost peripheral surface 102 includes the first surface 111 of the thin width portion 101. At this time, the backup 300 presses the material 600 against the upper side Y1 of the punch 200 with a force of at least 50% of the shear load of the material 600. The punching process is performed with the portion of the material 600 that will become the product 100 sandwiched between the punch 200 and the backup 300. This suppresses warping of the product 100 and the occurrence of sagging.

[0071] Furthermore, at this time, the stripper 400 is disposed around the punch 200 on the upper side Y1 of the material 600, and the die 500, which has the same shape in plan view as the stripper 400, is disposed on the lower side Y2 opposite the stripper 400 across the material 600. Therefore, the material 600 on the outside of the product 100 is sandwiched and fixed by the stripper 400 and the die 500.

[0072] In this process, an outermost surface 102 is formed, which has a first surface 111 of the thin width portion 101. Therefore, the outermost surface 102 is fixed by the punch 200 and the backup 300, the stripper 400 and the die 500, and the material 600 sandwiched between the stripper 400 and the die 500, and therefore the outermost surface 102, i.e., the first surface 111 of the thin width portion 101, is prevented from moving in the planar direction.

[0073] In this way, when punch 200 and backup 300 are used, the product is formed as shown in Fig. 40A, and when only the punch is used, the product is formed as shown in Fig. 40B, which is a comparative example. As is clear from a comparison between Fig. 40A and Fig. 40B, when backup 300 is used, the occurrence of sagging is suppressed more than when no backup is used, and the dimensional accuracy of product 100 is improved.

[0074] 32 is completed, the relationship between the material 600 and the product 100 with the hole waste material 601 fitted back is, for example, as in the first embodiment, as shown in Fig. 14, the product 100 with the punched hole waste material 601 fitted back by the backup 300 is pushed back, and the punched product 100 is fitted into the original material 600 by at least 20% of the plate thickness. In this way, in the punching back process of Fig. 32, there is a possibility that the product 100 has not sufficiently returned to the same position as the material 600, so next, as shown in Figs. 34 and 35, a flat punching process is performed in which the product 100 with the hole waste material 601 fitted back into the material 600 is fitted.

[0075] Figure 34 is a plan view showing the state of the product 100 in which the hole waste material 601 has been fitted back into the material 600 after being flattened. Figure 35 is a cross-sectional view showing the flattening process at the A-A line cross section in Figure 34. As shown in Figure 35, the product 100 in which the hole waste material 601 has been fitted back is sandwiched between a stripper 401 and a die 501, which have flat surfaces in the planar direction, thereby fitting the product 100 in which the hole waste material 601 has been fitted back into its original position in the material 600. Then, as shown in Figure 34, the product 100 in which the hole waste material 601 has been fitted back into the material 600.

[0076] Next, in order to discharge the hole waste material 601 of the product 100 into which the hole waste material 601 has been fitted back, a hole dropping process is performed, excluding the backup, as shown in Figures 36 and 37. Figure 36 is a plan view showing the state after the hole waste material 601 has been dropped from the product 100. Figure 37 is a cross-sectional view showing the hole dropping process at the cross section of line A-A in Figure 36. As shown in Figure 37, the hole waste material 601 fitted back into the product 100 is pressed down by a punch 215 having a flat surface in the planar direction, and is removed from the hole waste material 601 from the product 100 and discharged into the die 502.

[0077] Next, in order to eject and stack the product 100, the backup is removed and a dropping process is performed as shown in FIGS. 38 and 39. FIG. 38 is a plan view showing the state after the product 100 has been dropped from the material 600. FIG. 39 is a cross-sectional view showing the dropping process at the cross section of line A-A in FIG. 38. As shown in FIG. 39, the product 100 is pressed down with a punch 202 having a flat surface in the planar direction, removing the product 100 from the material 600 and ejecting it into the die 500. Then, the product 100 is formed from the material 600 as shown in FIG.

[0078] The thin portion 101 of the product 110 manufactured by the above process is characterized in that, as in the first embodiment, burrs or traces of crushed burrs are found on the upper side Y1 of the first surface 111 and the lower side Y2 of the second surface 112 of the thin portion 101, as shown in Figure 13. Also, sagging is found on the lower side Y2 of the first surface 111 and the upper side Y1 of the second surface 112. Note that the burrs and sagging shown here do not indicate defects, but rather indicate the characteristic appearance configuration resulting from this process.

[0079] The press device of the fourth embodiment configured as described above has the same effects as the above-described embodiments, and can also reliably ensure the strength of the thin width portion.

[0080] Fifth Embodiment In this fifth embodiment, as in the first embodiment, the outermost peripheral surface 102 of the product 100 is formed first, and then the hole 120 is formed. Note that the same parts as in the above-described embodiments are denoted by the same reference numerals. The following description will focus on parts that differ from the first embodiment.

[0081] First, as in the first embodiment, a punching-back process is performed to form the outermost peripheral surface 102 of the product 100, as shown in Figures 5 and 6. Then, since the product 100 does not fully return to the same position as the material 600 in the punching-back process of Figure 5, a flat-fitting process is performed to fit the product 100 into the material 600, as shown in Figures 7 and 8.

[0082] Next, as shown in FIGS. 41 to 43, a hole processing step is performed to form the hole 120. FIG. 41 is a plan view showing the state after the hole 120 has been formed. FIG. 42 is a cross-sectional view taken along line A-A in FIG. 41, showing the hole processing step for the hole 120. FIG. 43 is an enlarged cross-sectional view showing a portion of FIG. 42 in detail. As shown in FIG. 42, a punch 201 is placed on the upper side Y1 of the material 600. The material 600 is then punched out by the punch 201, forming the hole 120 of the product 100. The hole 120 includes the second surface 112 of the thin width portion 101. The waste hole material 601 removed from the hole 120 is discharged into the die 502.

[0083] Furthermore, at this time, a stripper 402 is disposed around the punch 201 on the upper side Y1 of the material 600, and a die 502 having the same shape as the stripper 402 in plan view is disposed on the lower side Y2 opposite the stripper 402 with the material 600 in between. Furthermore, as shown in FIG. 43 , a protrusion 555 is formed on the upper side Y1 of the die 502. The protrusion 555 is formed at a position where it abuts against the thin width portion 101 in plan view. Note that FIG. 41 shows the planar location of the protrusion 555. As is clear from this figure, the protrusion 555 is disposed at a position where it abuts against the thin width portion 101 in plan view, as previously shown.

[0084] In this process, a hole 120 having a second surface 112 of the thin portion 101 is formed. Thus, the hole 120 is formed in a state in which the upper Y1 and lower Y2 surfaces of the thin portion 101 are sandwiched, and further, both the first surface 111 and the second surface 112 of the thin portion 101 are fixed by the punch 201, the stripper 402 and the die 502, and the material 600 sandwiched between the stripper 402 and the die 502. Furthermore, the lower Y2 surface of the thin portion 101 is pressed by the protrusion 555 of the die 502. Therefore, the thin portion 101 is formed while being prevented from moving in the planar direction. This prevents deformation and sagging of the thin portion 101.

[0085] In FIG. 41 , the product 100, after punching the hole 120 and completing the formation of the thin width portion 101, is fitted back into the material 600 and pressed in. Therefore, in order to eject and stack the product 100, the backup is removed and a dropping process is carried out as shown in FIGS. 44 and 45 . FIG. 44 is a plan view showing the state after the product 100 has been dropped from the material 600. FIG. 45 is a cross-sectional view showing the dropping process at the cross section of line A-A in FIG. 11 . As shown in FIG. 45 , the product 100 is pressed down by a punch 202 having a flat surface in the planar direction, removing the product 100 from the material 600 and ejecting it into the die 500. Then, the product 100 is formed from the material 600 as shown in FIG. 44 .

[0086] The thin width portion 101 of the product 110 manufactured by the above process has a feature that, unlike the comparative example shown in Fig. 46B, in the present embodiment 5, as shown in Fig. 46A, traces of burrs being crushed are visible on the upper side Y1 of the first surface 111 of the thin width portion 101, and burrs are visible on the lower side Y2 of the second surface 112. Furthermore, the product is characterized in that sagging is visible on the lower side Y2 of the first surface 111 and the upper side Y1 of the second surface 112.

[0087] 46A , a first burr 701 protruding from one end surface of the material 600 in the thickness direction Y is formed on an upper side Y1, which is one end side of the first surface 111 in the thickness direction Y. A second burr 702 protruding from the other end surface of the material in the thickness direction Y is formed on a lower side Y2, which is the other end side of the second surface 112 in the thickness direction Y. The first burr 701 has crushed traces, and a height H1 of the first burr 701 protruding from one end surface of the material 600 in the thickness direction Y is smaller than a height H2 of the second burr 702 protruding from the other end surface of the material in the thickness direction Y. A product 100 having a thin width portion 101 formed in this manner is the iron core 40 of a rotating electric machine 1. The thin width portion 101 corresponds to the thin width portion (bridge) 12 of the iron core 40, and a rotating electric machine 1 including the iron core 40 is configured, for example, as shown in FIGS. 1 and 2 .

[0088] The reason why traces of crushed burrs can be seen on the upper side Y1 of the first surface 111 of the thin width portion 101 is that, first, as in the first embodiment, the thin width portion 101 is sandwiched once in the flattening process shown in Figures 7 and 8, and furthermore, in the fifth embodiment, by providing protrusions 555 as shown in Figures 41, 42, and 43, the thin width portion 101 is pressed down from above and below in the thickness direction Y in a manner that completely crushes it, so that the burrs that were generated in the punching back process shown in Figures 5 and 6, which were formed in a process similar to the first embodiment, are crushed. Note that the burrs and sagging shown here do not indicate any defects, but rather indicate the characteristic appearance of the process.

[0089] As described above, in the fifth embodiment, after the punching process of the outermost peripheral surface 102 of the product 100 is performed, a flat punching process is performed, and then a hole processing process is performed to form the hole 120 inside the product 100, and then a drop processing is performed to manufacture the product 100, so that the product 100 can be manufactured in four processes. In contrast, in the comparative example shown in FIG. 82, the product was manufactured in at least five processes. Therefore, the fifth embodiment can reduce the number of processes compared to the comparative example. Furthermore, according to the fifth embodiment, the material yield is improved.

[0090] The press device of embodiment 5 configured as described above has the same effects as the above embodiments, and since the die is provided with a protrusion that protrudes along the planar direction of the thin width portion, the strength of the thin width portion can be reliably ensured.

[0091] Furthermore, the rotating electric machine of embodiment 5 configured as described above is provided with a rotating electric machine core punched out of material by a press machine, and in a thin width portion formed with a width smaller than the thickness of the material, when a surface formed by cutting one side of the thin width portion in the width direction is defined as a first surface and a surface formed by cutting the other side in the width direction is defined as a second surface, a first burr protruding from one end face in the thickness direction of the material is formed on one end side of the first surface, and a second burr protruding from the other end face in the thickness direction of the material is formed on the other end side of the second surface, the first burr has crushed marks, and the height of the first burr protruding from one end face in the thickness direction of the material is smaller than the height of the second burr protruding from the other end face in the thickness direction of the material, thereby ensuring the strength of the thin width portion and improving the quality of the rotating electric machine.

[0092] Sixth Embodiment In this sixth embodiment, a press working process different from that of the above-described embodiments will be described. However, the product 100 having the thin width portion 101 has the same shape.

[0093] First, a method for manufacturing a product using a press machine configured similarly to the above-described embodiments will be described with reference to FIGS. 47 to 56 . First, as shown in FIGS. 47 to 49 , a half-blanking process is performed in which a material 600 is half-blanked with a punch 210 to form a portion of the outermost peripheral surface 102 of the product 100 in the thickness direction Y. FIG. 47 shows the material 600 after half-blanking along the outermost peripheral surface 102 of the product 100. FIG. 48 is a cross-sectional view taken along line A-A in FIG. 47 , illustrating the half-blanking process. FIG. 49 is a partially enlarged cross-sectional view showing the details of the configuration of FIG. 48 , simply illustrating only the essential parts. Note that in this disclosure, the term "half-blanking" refers to a case in which a portion of the material 600 is cut in the thickness direction Y and a portion is left uncut. Since this meaning is used in the respective embodiments, its description will be omitted as appropriate.

[0094] As shown in Figures 48 and 49, a punch 210 is placed on the upper side Y1 of the material 600, and a backup 300, which has a substantially identical planar shape to the punch 210, is placed on the lower side Y2 of the material 600. With the material 600 sandwiched between them, the punch 210 performs half-punching, forming a portion of the outermost peripheral surface 102 of the product 100 in the thickness direction Y, approximately 80% of the thickness direction Y, without completely shearing the material 600. The outermost peripheral surface 102 includes the first surface 111 of the thin width portion 101. At this time, the backup 300 presses the material 600 against the punch 210 on the upper side Y1 with a force of at least 50% of the shear load of the material 600, and punching is performed with the portion of the material 600 that will become the product 100 sandwiched between the punch 210 and the backup 300. This suppresses warping of the product 100 and the occurrence of sagging.

[0095] Furthermore, at this time, the stripper 400 is disposed around the punch 210 on the upper side Y1 of the material 600, and the die 500, which has the same shape in plan view as the stripper 400, is disposed on the lower side Y2 opposite the stripper 400 across the material 600. Therefore, the material 600 on the outside of the product 100 is sandwiched and fixed by the stripper 400 and the die 500.

[0096] In this process, the outermost peripheral surface 102 having the first surface 111 of the thin width portion 101 is formed by half-punching to a position that is about 80% of the way in the plate thickness direction Y. As a result, the punch 210 does not move to a position where it comes into contact with the die 500. Therefore, the difference between the outer dimension of the punch 210 and the inner diameter dimension of the die 500 can be made zero or less, which further suppresses the occurrence of sagging of the material 600.

[0097] Furthermore, since the outermost surface 102 is fixed by the punch 210 and backup 300, the stripper 400 and die 500, and the material 600 sandwiched between the stripper 400 and die 500, the outermost surface 102, i.e., the first surface 111 of the thin width portion 101, is prevented from moving in the planar direction.

[0098] Then, when the process of Figure 47 is completed, the relationship between the material 600 and the product 100 is such that more than 20% of the thickness of the product 100 is connected to the original material 600 by the half-blanking process, as shown in Figure 49 described above. Next, as shown in Figures 50 to 52, a flat-forcing process is performed in which the product 100 is fitted into the material 600. Figure 50 is a plan view showing the state after the product 100 has been flat-forged into the material 600. Figure 51 is a cross-sectional view showing the flat-forcing process at the cross section of line A-A in Figure 50. Figure 52 is a partially enlarged cross-sectional view showing the details of the configuration of Figure 51, simply showing only the main parts.

[0099] As shown in Figure 51, the product 100 is sandwiched between a stripper 401 and a die 501, both of which have flat surfaces in the planar direction, to fit the product 100 back into its original position in the material 600. Then, as shown in Figure 50, the product 100 is fitted back into the material 600. In this process, approximately 20% of the outermost surface 102 having the first surface 111 of the thin width portion 101, which was connected in the thickness direction Y, returns to its original position. As a result, as shown in Figure 52, the outermost surface 102 of the product 100 is completely cut and formed. Therefore, sagging is formed on both the upper side Y1 and the lower side Y2 of the outermost surface 102 of the product 100.

[0100] Next, as shown in Figures 53 and 54, a hole processing step is performed to form hole 120. Figure 53 is a plan view showing the state after hole 120 has been formed. Figure 54 is a cross-sectional view taken along line A-A in Figure 53, showing the hole processing step for hole 120. As shown in Figure 54, a punch 201 is placed on the upper side Y1 of material 600. Then, material 600 is punched out by punch 201, and hole 120 of product 100 is formed. Hole 120 includes second surface 112 of thin width portion 101. Furthermore, waste hole material 601 removed from hole 120 is discharged into die 502.

[0101] Furthermore, at this time, a stripper 402 is arranged around the punch 201 on the upper side Y1 of the material 600, and a die 502 having the same shape in plan as the stripper 402 is arranged on the lower side Y2 opposite the stripper 402 across the material 600. Therefore, the product 100 and the material 600 outside the product 100 are sandwiched and fixed by the stripper 402 and the die 502.

[0102] In this process, a hole 120 is formed having the second surface 112 of the thin portion 101. Thus, the hole 120 is formed in a state in which the upper Y1 and lower Y2 surfaces of the thin portion 101 are sandwiched, and further, both the first surface 111 and the second surface 112 of the thin portion 101 are fixed by the punch 201, the stripper 402 and the die 502, and the material 600 sandwiched between the stripper 402 and the die 502. Thus, the thin portion 101 is formed while being prevented from moving in the planar direction. This prevents deformation and sagging of the thin portion 101.

[0103] In FIG. 53 , the product 100, after punching the hole 120 and completing the formation of the thin width portion 101, is fitted back into the material 600 and pressed in. Therefore, in order to eject and stack the product 100, the backup is removed and a dropping process is carried out as shown in FIGS. 55 and 56 . FIG. 55 is a plan view showing the state after the product 100 has been dropped from the material 600. FIG. 56 is a cross-sectional view showing the dropping process at the A-A line cross section in FIG. 55 . As shown in FIG. 56 , the product 100 is pressed down by a punch 202 having a flat surface in the planar direction, removing the product 100 from the material 600 and ejecting it into the die 500. Then, the product 100 is formed from the material 600 as shown in FIG. 55 .

[0104] The thin width portion 101 of the product 110 manufactured by the above process is characterized in that, as shown in Figure 57, burrs or traces of crushed burrs are visible on the lower side Y2 of the second surface 112 of the thin width portion 101. Also, sagging is visible 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. Note that the burrs and sagging shown here do not indicate defects, but rather indicate the characteristic appearance configuration resulting from this process.

[0105] As described above, in the sixth embodiment, after the half-blanking process of the outermost peripheral surface 102 of the product 100, a flat punching process is performed, and then a hole processing process for forming the hole 120 inside the product 100 is performed, followed by a drop processing to manufacture the product 100. Therefore, the product 100 can be manufactured in four processes. In contrast, in the comparative example shown in FIG. 82, the product was manufactured in at least five processes. Therefore, the sixth embodiment can reduce the number of processes compared to the comparative example. Furthermore, according to the sixth embodiment, the material yield is improved.

[0106] The press device of the sixth embodiment configured as described above has the same effects as the above-described embodiments, and can stably manufacture thin width portions.

[0107] Seventh Embodiment In this seventh embodiment, a press working different from that of each of the above-described embodiments will be described. However, the product 100 having the thin width portion 101 has the same shape.

[0108] First, a method for manufacturing a product using a press machine configured similarly to the above-described embodiments will be described with reference to FIGS. 58 to 68. First, as shown in FIGS. 58 to 61, a partial punching process is performed in which a portion of material 600 is punched with punch 203 to form product 100, leaving a planar portion 666 of outermost peripheral surface 102. FIG. 58 shows material 600 after partial punching along outermost peripheral surface 102 of product 100. FIG. 59 is a cross-sectional view taken along line A-A in FIG. 58, showing the partial punching process. FIGS. 60 and 61 are enlarged perspective views showing the details of the configuration of FIG. 59, simply illustrating the essential parts with stripper 400 and die 500 omitted.

[0109] As shown in Figures 58 and 60, a punch 203 is placed on the upper side Y1 of the material 600, and a backup 303 having the same shape as the punch 203 is placed on the lower side Y2 of the material 600. Then, with the material 600 sandwiched between them, as shown in Figure 61, a partial punching operation is performed with the punch 203, forming a planar portion 666 of the outermost peripheral surface 102 of the product 100 without shearing, leaving the material 600 unsheared and connected. The outermost peripheral surface 102 includes the first surface 111 of the thin width portion 101. At this time, the backup 303 presses the material 600 against the punch 203 on the upper side Y1 with a force of at least 50% of the shear load of the material 600, and punching is performed with the portion of the material 600 that will become the product 100 sandwiched between the punch 203 and the backup 303. This suppresses warping of the product 100 and the occurrence of sagging.

[0110] Furthermore, at this time, the stripper 400 is disposed around the punch 203 on the upper side Y1 of the material 600, and the die 500, which has the same shape in plan view as the stripper 400, is disposed on the lower side Y2 opposite the stripper 400 across the material 600. Therefore, the material 600 on the outside of the product 100 is sandwiched and fixed by the stripper 400 and the die 500.

[0111] In this process, as described above, the outermost peripheral surface 102 having the first surface 111 of the thin width portion 101 is formed in a state in which a portion of the outermost peripheral surface 102 is not cut in the planar direction. As described above, in the seventh embodiment, the material 600 is not cut in part, and only a portion 666 is left, cutting only the target location, and the entire outermost peripheral surface 102 of the product 100 is not formed. Therefore, in the above-described embodiments in which the outermost peripheral surface 102 of the product 100 is punched out at one time, the product 100 is moved between processes in a pressed-fit state, and there is a possibility of misalignment during the process. However, in the seventh embodiment, the portion 666 of the outermost peripheral surface 102 is left uncut and connected to the material 600, thereby eliminating the possibility of misalignment and achieving stable dimensions.

[0112] Furthermore, since the outermost surface 102, of which a portion 666 remains, is fixed by the punch 203 and backup 303, the stripper 400 and die 500, and the material 600 sandwiched between the stripper 400 and die 500, the outermost surface 102, i.e., the first surface 111 of the thin width portion 101, is prevented from moving in the planar direction.

[0113] 58 is completed, the relationship between the material 600 and the product 100 is such that a portion of the outermost surface 102 of the product 100 is connected to the original material 600 due to the partial punching process. Next, as shown in Figures 62 and 63, a flat punching process is performed in which the product 100 is fitted into the material 600. Figure 62 is a plan view showing the state after the product 100 has been flat punched into the material 600. Figure 63 is a cross-sectional view showing the flat punching process at the cross section of line A-A in Figure 62.

[0114] As shown in Fig. 63, the product 100 is sandwiched between a stripper 401 and a die 501, which have flat surfaces in the planar direction, to fit the product 100 back into its original position in the material 600. Then, as shown in Fig. 62, the product 100 is fitted back into the material 600. In this process, the part of the outermost peripheral surface 102 that had been connected and that has the first surface 111 of the thin width portion 101 returns to its original position. As a result, the outermost peripheral surface 102 of the product 100 is completely cut off, as shown in Fig. 62. Therefore, sagging is formed on both the upper side Y1 and the lower side Y2 of the outermost peripheral surface 102 of the product 100.

[0115] Next, as shown in Figures 64 and 65, a hole processing step is performed to form hole 120. Figure 64 is a plan view showing the state after hole 120 has been formed. Figure 65 is a cross-sectional view taken along line A-A in Figure 64, showing the hole processing step for hole 120. As shown in Figure 65, a punch 201 is placed on the upper side Y1 of material 600. Then, material 600 is punched out by punch 201, and hole 120 of product 100 is formed. Hole 120 includes second surface 112 of thin width portion 101. Furthermore, waste hole material 601 removed from hole 120 is discharged into die 502.

[0116] Furthermore, at this time, a stripper 402 is arranged around the punch 201 on the upper side Y1 of the material 600, and a die 502 having the same shape in plan as the stripper 402 is arranged on the lower side Y2 opposite the stripper 402 across the material 600. Therefore, the product 100 and the material 600 outside the product 100 are sandwiched and fixed by the stripper 402 and the die 502.

[0117] In this process, a hole 120 is formed having the second surface 112 of the thin portion 101. Thus, the hole 120 is formed in a state in which the upper Y1 and lower Y2 surfaces of the thin portion 101 are sandwiched, and further, both the first surface 111 and the second surface 112 of the thin portion 101 are fixed by the punch 201, the stripper 402 and the die 502, and the material 600 sandwiched between the stripper 402 and the die 502. Thus, the thin portion 101 is formed while being prevented from moving in the planar direction. This prevents deformation and sagging of the thin portion 101.

[0118] In FIG. 64 , the product 100, after punching the hole 120 and completing the formation of the thin width portion 101, is fitted back into the material 600 and pressed in. Therefore, in order to eject and stack the product 100, the backup is removed and a dropping process is carried out as shown in FIGS. 66 and 67 . FIG. 66 is a plan view showing the state after the product 100 has been dropped from the material 600. FIG. 67 is a cross-sectional view showing the dropping process at the A-A line cross section in FIG. 66 . As shown in FIG. 67 , the product 100 is pressed down with a punch 202 having a flat surface in the planar direction, removing the product 100 from the material 600 and ejecting it into the die 500. Then, the product 100 is formed from the material 600 as shown in FIG. 66 .

[0119] The thin width portion 101 of the product 110 manufactured by the above process is characterized in that, as shown in Figure 68, burrs or traces of crushed burrs are visible on the upper side Y1 of the first surface 111 and the lower side Y2 of the second surface 112 of the thin width portion 101. Also, sagging is visible on the lower side Y2 of the first surface 111 and the upper side Y1 of the second surface 112. Note that the burrs and sagging shown here do not indicate defects, but rather indicate the characteristic appearance configuration resulting from this process.

[0120] As described above, in the seventh embodiment, after a partial punching process is performed on the outermost peripheral surface 102 of the product 100, a flat punching process is performed, and then a hole processing process is performed to form the hole 120 inside the product 100, and then a drop processing is performed to manufacture the product 100, so that the product 100 can be manufactured in four processes. In contrast, in the comparative example shown in FIG. 82, the product is manufactured in at least five processes. Therefore, the number of processes can be reduced in the seventh embodiment. Furthermore, according to the seventh embodiment, the material yield is improved.

[0121] The press device of the seventh embodiment configured as described above has the same effects as the above-described embodiments, and can stably manufacture thin width portions.

[0122] Eighth Embodiment In each of the above-described embodiments, an example was shown in which the first surface 111, which is either a surface formed by cutting the thin width portion 101 in one direction in the width direction XX or a surface formed by cutting the thin width portion 101 in the other direction in the width direction XX, is part of the outermost surface 102 of the product 100, but this is not limited to this, and in the eighth embodiment, a case will be described in which the surface formed by cutting the thin width portion in one direction in the width direction is the first surface, and the surface formed by cutting the thin width portion in the other direction in the width direction is the second surface, and both surfaces are formed in a location different from the outermost surface 102 of the product 100.

[0123] First, the relationship between the material 600, the product 100, and the thin width portion 101 will be described with reference to Figures 69 and 70. Figure 69 is a plan view showing the configuration of a product manufactured by the press device according to embodiment 8. Figure 70 is a cross-sectional view showing the configuration of the cross section of line B-B of the product shown in Figure 69. Parts similar to those in the above embodiments are given the same reference numerals, and descriptions thereof will be omitted.

[0124] In the cross section shown in Figure 70, the direction of width W2, which is smaller than the thickness T1 of material 600 of thin width portion 101, will be described as width direction XXX. Therefore, the width direction XXX is part of the planar direction of material 600. A first hole 121 and a second hole 122 are formed as holes for forming thin width portion 101 of product 100. The part formed by first hole 121 of thin width portion 101 is first surface 111 of the surface formed by cutting on one side in the width direction XXX, and the part formed by second hole 122 is second surface 112 of the surface formed by cutting on the other side in the width direction XXX.

[0125] Next, a method for manufacturing a product using a press machine according to an eighth embodiment configured similarly to the above-described embodiments will be described with reference to Figures 71 to 81. First, as in the first embodiment, a punching-back process is performed to form the outermost peripheral surface 102 of the product 100, as shown in Figures 5 and 6. Then, since the product 100 does not fully return to the same position as the material 600 in the punching-back process shown in Figure 5, a flat-stripping process is performed in which the product 100 is fitted into the material 600, as shown in Figures 7 and 8.

[0126] Next, as shown in Figures 71 and 72, a punching and returning process is performed to form the first hole portion 121. Figure 71 is a plan view showing the state after the first hole portion 121 has been formed. Figure 72 is a cross-sectional view taken along line B-B in Figure 71, showing the punching and returning process for the first hole portion 121. As shown in Figure 72, a punch 211 is placed on the upper side Y1 of the material 600, and a backup 311 having the same shape as the punch 211 is placed on the lower side Y2 of the material 600 in a planar manner. With the material 600 sandwiched between them, the punch 211 punches out the material 600, forming the first hole portion 121 of the product 100. The first hole portion 121 includes the first surface 111 of the thin width portion 101.

[0127] Furthermore, at this time, a stripper 411 is disposed around the punch 211 on the upper side Y1 of the material 600, and a die 511 having the same shape in plan view as the stripper 411 is disposed on the lower side Y2 opposite the stripper 411 across the material 600. Therefore, the material 600 outside the first hole portion 121 is sandwiched and fixed by the stripper 411 and the die 511.

[0128] In this process, a first hole 121 having a first surface 111 of the thin portion 101 is formed. Therefore, the first hole 121 is formed in a state in which the upper Y1 and lower Y2 surfaces of the thin portion 101 are sandwiched, and the first surface 111 of the thin portion 101 is fixed by the punch 211 and backup 311, the stripper 411 and die 511, and the material 600 sandwiched between the stripper 411 and die 511. Therefore, the first surface 111 of the thin portion 101 is formed while being prevented from moving in the planar direction. This prevents deformation and sagging of the thin portion 101.

[0129] 71 is completed, the relationship between the material 600 and the first waste hole material 611 is, for example, similar to the above-described embodiments, such that the punched first hole portion 121 is pushed back by the backup 311, and the punched first waste hole material 611 is fitted into the original material 600 by at least 20% of the plate thickness. In this way, in the hole punching return process of FIG. 71, there is a possibility that the first waste hole material 611 has not sufficiently returned to the same position as the material 600, so next, as shown in FIGS. 73 and 74, a flat punching process is performed in which the first waste hole material 611 is fitted into the material 600.

[0130] Figure 73 is a plan view showing the state after the first hole waste material 611 has been flattened into the material 600. Figure 74 is a cross-sectional view showing the flattening process at the B-B line cross section in Figure 7. As shown in Figure 74, the first hole waste material 611 is sandwiched between the stripper 401 and the die 501, which have flat surfaces in the planar direction, so that the first hole waste material 611 is fitted back into the original position within the first hole portion 121 of the material 600. Then, as shown in Figure 73, the first hole waste material 611 is fitted back into the material 600.

[0131] Next, as shown in FIGS. 75 and 76 , a hole drilling process is performed to form the second hole portion 122. FIG. 75 is a plan view showing the state after the second hole portion 122 has been formed. FIG. 76 is a cross-sectional view taken along line B-B in FIG. 75 , showing the hole drilling process for the second hole portion 122. As shown in FIG. 76 , a punch 212 is placed on the upper side Y1 of the material 600 into which the first hole waste material 611 has been fitted. The material 600 is then punched out by the punch 212, forming the second hole portion 122 of the product 100. The second hole portion 122 includes the second surface 112 of the thin width portion 101. The second hole waste material 612 removed from the second hole portion 122 is discharged into the die 512.

[0132] Furthermore, at this time, a stripper 412 is arranged around the punch 212 on the upper side Y1 of the material 600 into which the first hole waste material 611 is fitted, and a die 512 having the same shape in plan view as the stripper 412 is arranged on the lower side Y2 opposite the stripper 412 across the material 600 into which the first hole waste material 611 is fitted. Therefore, the product 100, the first hole waste material 611, and the material 600 outside the product 100 are sandwiched and fixed by the stripper 412 and the die 512.

[0133] In this process, a second hole portion 122 having a second surface 112 of the thin width portion 101 is formed. Therefore, the second hole portion 122 is formed in a state in which the upper Y1 and lower Y2 surfaces of the thin width portion 101 are sandwiched, and further, both the first surface 111 and the second surface 112 of the thin width portion 101 are fixed by the punch 212, the stripper 412 and the die 512, and the product 100 and material 600 into which the first hole waste material 611 sandwiched between the stripper 412 and the die 512 is fitted. Therefore, the thin width portion 101 is formed while movement in the planar direction is suppressed. This suppresses deformation and sagging of the thin width portion 101.

[0134] Next, in order to eject the first hole waste material 611 that has been fitted back into the product 100, a hole dropping process is performed, excluding the backup, as shown in Figures 77 and 78. Figure 77 is a plan view showing the state after the first hole waste material 611 has been dropped from the product 100. Figure 78 is a cross-sectional view showing the hole dropping process, taken along line B-B in Figure 77. As shown in Figure 78, the first hole waste material 611 that has been fitted back into the product 100 is pressed down by a punch 213 having a flat surface in the planar direction, and is removed from the first hole waste material 611 and ejected into the die 511.

[0135] Next, in order to eject and stack the product 100, the backup is removed and a dropping process is performed as shown in FIGS. 79 and 80. FIG. 79 is a plan view showing the state after the product 100 has been dropped from the material 600. FIG. 80 is a cross-sectional view showing the dropping process at the cross section of line B-B in FIG. 79. As shown in FIG. 80, the product 100 is pressed down with a punch 202 having a flat surface in the planar direction, removing the product 100 from the material 600 and ejecting it into the die 500. Then, the product 100 is formed from the material 600 as shown in FIG.

[0136] The thin width portion 101 of the product 110 manufactured by the above process is characterized in that, as shown in Figure 81, burrs or traces of crushed burrs are visible on the lower side Y2 of the first surface 111 of the thin width portion 101. Also, sagging is visible on the upper side Y1 of the first surface 111 and the upper side Y1 and lower side Y2 of the second surface 112. Note that the burrs and sagging shown here do not indicate defects, but rather indicate the characteristic appearance configuration resulting from this process.

[0137] The press device of embodiment 8 configured as described above has the same effects as the above embodiments, and can stably manufacture products even if the first and second surfaces of the thin width portion are not the outermost peripheral surfaces.

[0138] Embodiment 9. In this embodiment 9, unlike the above-described embodiment 1, a case will be described with reference to FIGS. 83 to 97 in which a portion of the entire circumference of the outermost peripheral surface 102 of the product 100 is punched out, and then the entire circumference of the outermost peripheral surface 102 of the product 100 is punched out. Note that parts similar to those in the above-described embodiments will be described with the same reference numerals. Also, in each figure, the direction of a cross section taken along line CC in the vertical direction Z is indicated as the vertical direction ZZ, and the direction of a cross section taken along line D-D in the vertical direction Z is indicated as the vertical direction ZZZ. Therefore, the vertical direction ZZ and the vertical direction ZZZ are part of the planar directions of the material 600.

[0139] First, as shown in Figures 83 to 85, a half-blanking process is performed on the material 600 using a punch 214 to punch out a portion of the entire circumference of the outermost peripheral surface 102 of the product 100 in the plate thickness direction Y. Figure 83 shows the material 600 after half-blanking along a portion of the entire circumference of the outermost peripheral surface 102 of the product 100. Figure 84 is a cross-sectional view taken along line CC in Figure 83, showing the half-blanking process. Figure 85 is a cross-sectional view taken along line DD in Figure 83, showing the half-blanking process. The portions of the outermost peripheral surface 102 shown by solid lines in Figure 83 indicate the half-blanked areas, and the interrupted portions of the solid lines indicate the portions of the outermost peripheral surface 102 that are not half-blanked. Figure 84 shows the portions of the outermost peripheral surface 102 that are half-blanked, and Figure 85 shows the portions of the outermost peripheral surface 102 that are not half-blanked.

[0140] As shown in Figures 84 and 85, a punch 214 is placed on the upper side Y1 of the material 600, a backup 312 is placed on the lower side Y2 of the material 600, and half-punching is performed with the material 600 sandwiched between them, so that a portion of the entire circumference of the outermost surface 102 of the product 100, a portion in the thickness direction Y, up to about 80% in the thickness direction Y, is sheared off. Therefore, the material 600 is not completely sheared off, but only a portion of the entire circumference of the outermost surface 102 of the product 100. The half-punched portion of the entire circumference of the outermost surface 102 includes the first surface 111 of the thin width portion 101. At this time, the backup 312 presses the material 600 against the punch 214 on the upper side Y1 with a force of at least 50% of the shear load of the material 600, and punching is performed with the portion of the material 600 that will become the product 100 sandwiched between the punch 214 and the backup 312. This prevents the product 100 from warping and sagging.

[0141] Furthermore, at this time, the stripper 400 is disposed around the punch 214 on the upper side Y1 of the material 600, and a die 500 having the same shape in plan view as the stripper 400 is disposed on the lower side Y2 opposite the stripper 400 across the material 600. Therefore, the material 600 on the outside of the product 100 is sandwiched and fixed by the stripper 400 and the die 500.

[0142] As described above, in this process, a portion of the entire circumference of the outermost peripheral surface 102 having the first surface 111 of the thin width portion 101 is half-punched to a position that is about 80% of the way therein in the plate thickness direction Y. This prevents the punch 214 from moving to a position where it comes into contact with the die 500. Therefore, the difference between the outer dimension of the punch 214 and the inner diameter dimension of the die 500 can be made zero or less, which further suppresses sagging of the material 600.

[0143] Furthermore, since a portion of the entire circumference of the outermost surface 102 is fixed by the punch 214 and backup 312, the stripper 400 and die 500, and the material 600 sandwiched between the stripper 400 and die 500, movement of a portion of the entire circumference of the outermost surface 102, i.e., the first surface 111 of the thin width portion 101, in the planar direction is suppressed.

[0144] Furthermore, in this process, as described above, a portion of the outermost peripheral surface 102 is formed without being cut in the planar direction. Thus, in the ninth embodiment, a portion of the material 600 is left uncut, and only the targeted portion is cut, and the entire outermost peripheral surface 102 of the product 100 is not formed. Therefore, in the above-described embodiments in which the outermost peripheral surface 102 of the product 100 is punched out at once, the product 100 is moved between processes in a press-fit state, and there is a possibility of misalignment during the process. However, in the ninth embodiment, a portion of the entire circumference of the outermost peripheral surface 102 is cut, and a portion is left uncut and connected to the material 600, thereby eliminating the possibility of misalignment and obtaining stable dimensions.

[0145] Then, at the completion of the process of Figure 83, the relationship between the material 600 and the product 100 is as shown in Figure 84 (see, for example, Figure 49 of embodiment 6), in which the half-punching process connects the product 100 to the original material 600 for more than 20% of the plate thickness.

[0146] Further details will be explained. The configuration of the punch 214, backup 312, die 500, and material 600 required for this formation is shown in FIG. 86. Note that FIG. 86 omits the stripper 400, which is actually present, in order to show the detailed shape of the punch 214. Because the punch 214 and backup 312 half-punch a portion of the entire circumference of the outermost peripheral surface 102, as shown in FIG. 86, the punch 214 has a notch 244 formed by cutting out the portion that is not half-punched. Furthermore, the configuration of the punch 214 is shown in FIGS. 87A and 87B, which show which positions on the shape of the punch 214 correspond to the cross sections along lines CC and DD in FIG. 86. The cross section along line CC shows a portion of the cylindrical shape of the punch 214, and the cross section along line DD shows a portion of the circular shape where a portion is cut out.

[0147] 84 and 85 show the behavior of the material 600 when the punch 214 reaches the bottom dead center. As shown in Fig. 85, in the cross section taken along line D-D, a portion of the material 600 is not sheared due to the wide blade clearance of the punch 214, and only the material 600 elongates. Also, as shown in Fig. 84, only the targeted portion (a portion of the entire circumference of the outermost surface 102) is half-punched, as in the cross section taken along line C-C. As a result, the entire circumference of the outermost surface 102 of the product 100 is not half-punched, and a portion remains.

[0148] Next, as shown in Figures 88 to 90, a flat-punching process is performed in which the product 100 is fitted into the material 600. Figure 88 is a plan view showing the state after the product 100 has been flat-punched into the material 600. Figure 89 is a cross-sectional view taken along line CC in Figure 88, showing the flat-punching process. Figure 90 is a cross-sectional view taken along line DD in Figure 88, showing the flat-punching process. The portions of the outermost surface 102 shown by solid lines in Figure 88 indicate cut locations, and the interrupted portions of the solid lines indicate portions of the entire circumference of the outermost surface 102 that are not cut. Figure 89 shows the punched portions of the outermost surface 102, and Figure 90 shows the unpunched portions of the outermost surface 102.

[0149] As shown in Figures 89 and 90 , the product 100 is sandwiched between a stripper 401 and a die 501, both of which have flat surfaces in the planar direction, to return the product 100 to its original position in the material 600. Then, as shown in Figures 89 and 90 , the product 100 is fitted back into the material 600. In this process, approximately 20% of the entire periphery of the outermost surface 102 having the first surface 111 of the thin width portion 101, which was connected in the thickness direction Y, returns to its original position. As a result, as shown in Figure 89 , the entire periphery of the outermost surface 102 of the product 100 is completely cut and formed. Therefore, sagging is formed on both the upper side Y1 and the lower side Y2 of the entire periphery of the outermost surface 102 of the product 100 (see, for example, Figure 52 of Embodiment 6). However, in this process, all but a portion of the entire circumference of the outermost surface 102, which is the portion that was not half-punched in the previous process (the process shown in Figures 83 to 85), is not sheared and remains connected.

[0150] Next, as shown in Figures 91 to 93, a hole processing step is performed to form hole 120. Figure 91 is a plan view showing the state after hole 120 has been formed. Figure 92 is a cross-sectional view taken along line A-A in Figure 91, showing the hole processing step for hole 120. Figure 93 is a cross-sectional view taken along line D-D in Figure 91, showing the hole processing step for hole 120. The portions of outermost peripheral surface 102 shown by solid lines in Figure 91 indicate cut locations, and the interrupted portions of the solid lines indicate portions of outermost peripheral surface 102 that are not cut. Figure 92 shows the punched portions of outermost peripheral surface 102, and Figure 93 shows the unpunched portions of outermost peripheral surface 102.

[0151] As shown in Fig. 92, a punch 201 is placed on the upper side Y1 of the material 600. The material 600 is then punched out by the punch 201, forming a hole 120 of the product 100. The hole 120 includes the second surface 112 of the thin width portion 101. The waste hole material 601 removed from the hole 120 is discharged into the die 502. The area shown in the cross section of line D-D in Fig. 93 remains unchanged from the state shown in Fig. 90.

[0152] Furthermore, at this time, a stripper 402 is arranged around the punch 201 on the upper side Y1 of the material 600, and a die 502 having the same shape in plan as the stripper 402 is arranged on the lower side Y2 opposite the stripper 402 across the material 600. Therefore, the product 100 and the material 600 outside the product 100 are sandwiched and fixed by the stripper 402 and the die 502.

[0153] In this process, a hole 120 is formed having the second surface 112 of the thin portion 101. Thus, the hole 120 is formed in a state in which the upper Y1 and lower Y2 surfaces of the thin portion 101 are sandwiched, and further, both the first surface 111 and the second surface 112 of the thin portion 101 are fixed by the punch 201, the stripper 402 and the die 502, and the material 600 sandwiched between the stripper 402 and the die 502. Thus, the thin portion 101 is formed while being prevented from moving in the planar direction. This prevents deformation and sagging of the thin portion 101.

[0154] 91, the product 100, in which the hole 120 has been punched and the formation of the thin width portion 101 has been completed, is fitted back into the material 600 and pressed in. However, at this stage, a portion of the outermost surface 102 of the product 100 remains uncut. Therefore, next, in order to cut off the uncut portion of the outermost surface 102 of the product 100 and eject and stack it, a cutting-off process is carried out, excluding the backup, as shown in FIGS.

[0155] FIG. 94 is a plan view showing the state after a portion of the outermost peripheral surface 102 that has not been cut has been cut from the material 600 and the product 100 has been dropped. FIG. 95 is a cross-sectional view showing the cutting-off process along the line A-A in FIG. 94. FIG. 96 is a cross-sectional view showing the cutting-off process along the line D-D in FIG. 94. As shown in FIGS. 95 and 96, a punch 200 having a flat surface in the planar direction cuts off a portion of the outermost peripheral surface 102 that has not been cut and presses down on the product 100, removing the product 100 from the material 600 and discharging it into a die 500 different from the one used to initially form the product 100. Then, the product 100 is formed from the material 600 as shown in FIG.

[0156] A feature of the thin width portion 101 of the product 110 manufactured by the above process is that, as shown in Figure 97A, sagging is observed on the upper side Y1 and lower side Y2 of the first surface 111 of the thin width portion 101 in the portion corresponding to the cross section of line A-A. Also, burrs are observed on the lower side Y2 of the second surface 112. Also, as shown in Figure 97B, a feature is that burrs are observed on the upper side Y1 of the outermost peripheral surface 102 in the portion corresponding to the cross section of line D-D along the outermost peripheral surface 102. Note that the burrs and sagging shown here do not indicate defects, but rather indicate the characteristic appearance configuration resulting from this process.

[0157] Thus, in the ninth embodiment, a part of the entire circumference of the outermost surface 102 of the product 100 is subjected to a half-blanking process, followed by a flat-punching process, and then a hole-cutting process to form a hole 120 inside the product 100, followed by a cutting-off process to manufacture the product 100. Therefore, the product 100 can be manufactured in four processes. In contrast, in the comparative example, the product was manufactured in at least five processes, as shown in Figures 82A, B → 82C, D → 82E, F → 82G, H → 82I, J. Therefore, the number of processes can be reduced in the ninth embodiment compared to the comparative example. Furthermore, according to the ninth embodiment, the material yield is improved.

[0158] Furthermore, in the above-described ninth embodiment, an example has been shown in which the notch portion 244 is formed in the punch 214, but this is not limitative, and for example, a punch 214 without the notch portion 244 may be used. Alternatively, a die 500 with the notch portion 244 may be used.

[0159] Specifically, the configuration of the punch 214, die 500, and material 600 is shown in FIG. 102 . Note that FIG. 102 omits the stripper 400 and backup 312, which are actually present, in order to show the detailed shapes of the punch 214 and die 500. When punching with the punch 214, the die 500 half-punches a portion of the entire circumference of the outermost surface 102. Therefore, as shown in FIG. 102 , the die 500 has a cutout portion 244, which is a cutout of the portion that is not half-punched. Furthermore, the configuration of the die 500, as shown in FIGS. 103A and 103B , shows which positions on the shape of the die 500 correspond to the cross sections along lines C-C and D-D. The cross section along line C-C shows a portion of the circular cylindrical hole in the die 500, and the cross section along line D-D shows a portion of the circular cylindrical hole where a cutout is made. Using a die 500 with the cutout portion 244 in this manner, a similar formation to that of the ninth embodiment can be achieved.

[0160] The press apparatus of the ninth embodiment configured as described above has the same effects as those of the above-described embodiments, and in addition, when a surface formed by cutting one side of the thin width portion in the width direction is a first surface, a surface formed by cutting the other side in the width direction is a second surface, and the first surface of the thin width portion is the outermost surface formed by cutting the product, the punch half-punches an inner part of the entire circumference of the outermost surface of the product, and then the backup is arranged to fit the outermost surface punched out by the punch back into the material, the stripper and the die fit the outermost surface half-punched out by the punch back into the material, and the inner part of the entire circumference of the outermost surface that has been fitted back is cut off in the plate thickness direction, and the punch is arranged to punch out the second surface of the thin width portion while the stripper and the die are pressing the thin width portion on the inner side of the outermost surface and the material on the outer side of the outermost surface, and after the punch punches out the second surface of the thin width portion, the punch punches out the entire circumference of the outermost surface, The strength of the thin width portion can be reliably ensured.

[0161] Embodiment 10. In this embodiment 10, unlike the above-mentioned embodiment 1, a case will be described in which the hole 120 of the product 100 is formed first, and the outermost peripheral surface 102 is formed later, as in the above-mentioned embodiment 4. Note that parts similar to the above-mentioned embodiments will be described with the same reference numerals. Furthermore, the description will focus on parts different from the above-mentioned embodiments.

[0162] First, as in the above-mentioned fourth embodiment, the steps shown in Figures 28 to 35 are carried out, and as shown in Figures 34 and 35, the hole portion 120 and the outermost peripheral surface 102 of the product 100 are formed, and the product 100 with the hole waste material 601 fitted back in is fitted back into the material 600.

[0163] Next, in order to eject the product 100 with the hole waste material 601 fitted back and stack multiple products, a dropping process is performed, excluding the backup, as shown in Figures 98 and 99. Figure 98 is a plan view showing the state after the product 100 with the hole waste material 601 fitted back has been dropped from the material 600. Figure 99 is a cross-sectional view showing the dropping process at the A-A cross section in Figure 98. As shown in Figure 99, a punch 202 having a flat surface in the planar direction presses down on the product 100 with the hole waste material 601 fitted back, removing the product 100 with the hole waste material 601 fitted back from the material 600 and ejecting it into the die 500. Then, the product 100 with the hole waste material 601 fitted back in is stacked in the die 500. Then, as shown in Figure 98, the product 100 with the hole waste material 601 fitted back is formed from the material 600.

[0164] Next, in order to eject the hole waste material 601 from the multiple products 100 into which the hole waste material 601 has been inserted, a hole removal process is performed, as shown in FIGS. 100 and 101 , excluding the backup. FIG. 100 is a plan view showing the state after the hole waste material 601 has been removed from the product 100. FIG. 101 is a cross-sectional view showing the hole removal process along line A-A in FIG. 100. As shown in FIG. 101 , a punch 215 having a flat surface in the planar direction presses down the hole waste material 601 that has been inserted back into the multiple stacked products 100, removing it from the hole waste material 601 and ejecting it into the die 513. At this time, as shown in FIG. 101 , a stripper 413 is positioned so as to cover the hole portions 120 on the top and side surfaces of the product 100. Then, multiple products 100 are formed from the material 600, as shown in FIG.

[0165] The thin width portion 101 of the product 110 manufactured by the above steps has the same characteristics as those of the fourth embodiment shown in FIG. 40A.

[0166] The press device of embodiment 10 configured as described above achieves the same effects as the above embodiments, and in addition, when the surface formed by cutting one side of the thin width portion in the width direction is a first surface and the surface formed by cutting the other side in the width direction is a second surface, and the first surface of the thin width portion is located on the outermost surface formed by cutting the product, after the punch punches out the second surface of the thin width portion, the stripper and the die are arranged to fit the second surface punched out by the punch back into the material and punch out the outermost surface of the product, and after a plurality of the punched products are stacked, the second surfaces of the thin width portions of all of the plurality of products are punched out, so that the strength of the thin width portion can be reliably ensured and a plurality of products can be efficiently manufactured.

[0167] Here, the main uses of each punch, backup, stripper, and die used in each of the above embodiments will be described. Punch 200 is a first cutting punch used to punch out the outermost peripheral surface 102 of product 100 from material 600. Punch 201 is a second cutting punch used to punch out a hole 120 from material 600 (product 100). Punch 202 is a third pushing punch used to remove the outermost peripheral surface 102 of product 100 from material 600. Punch 215 is a fourth pushing punch used to remove hole waste material 601 from material 600 (product 100). Punch 210 is a fifth cutting punch used to half-blanket the outermost peripheral surface 102 of product 100 from material 600 in the plate thickness direction Y. Punch 203 is a sixth cutting punch used to punch out the outermost peripheral surface 102 of product 100 from material 600, leaving a portion 666 of the outermost peripheral surface 102 of product 100. The punch 211 is a seventh cutting punch used to punch the first hole portion 121 from the material 600 (product 100). The punch 212 is an eighth cutting punch used to punch the second hole portion 122 from the material 600 (product 100). The punch 213 is a ninth pushing punch used to remove the first hole waste material 611 from the material 600 (product 100). The punch 214 is a tenth cutting punch used to half-punch in the plate thickness direction Y while leaving a portion of the outermost peripheral surface 102 of the product 100.

[0168] Backup 300 is a first backup for punch 200 or punch 210. Backup 301 is a second backup for punch 201. Backup 303 is a third backup for punch 203. Backup 311 is a fourth backup for punch 211. Backup 312 is a fifth backup for punch 214. Each backup also has the function of fitting the portion punched out by the punch back into its original position.

[0169] The stripper 400 and the die 500 are a first stripper and a first die that sandwich the material 600 outside the outermost surface 102 of the product 100. However, as described in the above embodiments, there may be a die 500 used in the manufacturing stage of the product 100 and a different die 500 that is finally used to remove the product 100 from the material 600 and store the product 100. Therefore, the different die 500 used to store the product 100 is distinguished from the first die and is the seventh die. The stripper 401 and the die 501 are a second stripper and a second die that sandwich the entire surface of the material 600 (product 100). The stripper 402 and the die 502 are a third stripper and a third die that sandwich the material 600 (product 100) other than the hole 120. The stripper 411 and the die 511 are a fourth stripper and a fourth die that sandwich the material 600 (product 100) other than the first hole 121. The stripper 412 and the die 512 are a fifth stripper and a fifth die that sandwich the material 600 (product 100) other than the second hole 122. The stripper 413 and the die 513 are a sixth stripper and a sixth die that sandwich the product 100 other than the hole 120.

[0170] Although various exemplary embodiments and examples are described in this disclosure, the various features, aspects, and functions described in one or more embodiments are not limited to the application of a particular embodiment, but may be applied to the embodiments alone or in various combinations. Therefore, countless variations not illustrated are contemplated within the scope of the technology of this disclosure. For example, this includes cases where at least one component is modified, added, or omitted, and even cases where at least one component is extracted and combined with components of another embodiment.

[0171] Various aspects of the present disclosure are summarized below as appendices.

[0172] (Supplementary Note 1) A press device that punches out material to manufacture a product, wherein, when punching out a thin portion of the product formed with a width smaller than the plate thickness of the material, the press device performs the punching while suppressing movement of the thin portion in a planar direction. (Supplementary Note 2) The press device according to Supplementary Note 1 has a punch, a backup, a stripper, and a die, the punch and the backup are arranged opposite each other above and below with the material in between, the stripper and the die are arranged opposite each other above and below with the material in between, and the punch, the backup, the stripper, and the die are arranged at positions that suppress movement of the thin portion in a planar direction. (Supplementary Note 3) The press device according to Supplementary Note 2, wherein the stripper and the die are arranged so as to return the portion punched out by the punch to the material. (Supplementary Note 4) The press device according to Supplementary Note 2 or Supplementary Note 3, wherein a surface formed by cutting one side of the thin width portion in the width direction is a first surface, a surface formed by cutting the other side of the width direction is a second surface, and the first surface and the second surface are punched out in different processes, the punch is provided with a protruding portion that abuts against the first surface or the second surface that was punched out first. (Supplementary Note 5) The press device according to Supplementary Note 2 or Supplementary Note 3, wherein a surface formed by cutting one side of the thin width portion in the width direction is a first surface, and a surface formed by cutting the other side of the width direction is a second surface, and the first surface and the second surface are punched out in different processes, the backup is provided with a protruding portion that abuts against the first surface or the second surface that was punched out first. (Supplementary Note 6) The press device according to any one of Supplementary Notes 2 to 5, wherein a surface formed by cutting one side of the thin width portion in the width direction is a first surface, a surface formed by cutting the other side in the width direction is a second surface, and the first surface or the second surface of the thin width portion is located on the outermost peripheral surface formed by cutting the product, the punch is positioned to punch the first surface or the second surface of the thin width portion after punching the outermost peripheral surface of the product. (Supplementary Note 7) The press device according to any one of Supplementary Notes 2 to 6, wherein the backup is positioned to press the material against the punch. (Supplementary Note 8) The press device according to any one of Supplementary Notes 2 to 7, wherein the die has a protrusion that protrudes along the planar direction of the thin width portion.(Supplementary Note 9) A method for manufacturing an iron core, the method comprising: manufacturing the product punched out from the material as an iron core for a rotating electric machine using the press device according to any one of Supplementary Note 1 to Supplementary Note 8; (Supplementary Note 10) A method for manufacturing a rotating electric machine, the method comprising manufacturing a rotating electric machine using the iron core manufactured by the iron core manufacturing method according to Supplementary Note 9.

[0173] REFERENCE SIGNS LIST 1 Rotating electric machine, 10 Rotor magnet, 11 Flux barrier, 12 Thin width portion, 100 Product, 101 Thin width portion, 102 Outermost peripheral surface, 103 Upper surface, 104 Lower surface, 111 First surface, 112 Second surface, 120 Hole portion, 121 First hole portion, 122 Second hole portion, 2 Outer frame, 3 Stator core piece, 30 Stator core, 4 Rotor core, 40 Iron 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 portion, 244 Notch portion, 300 Backup, 301 Backup, 303 Backup, 311 Backup, 312 Backup, 333 Protrusion, 400 Stripper, 401 Stripper, 402 Stripper, 411 Stripper, 412 Stripper, 413 Stripper, 500 Die, 501 Die, 502 Die, 511 Die, 512 Die, 513 Die, 555 Protrusion, 600 Material, 601 Hole waste material, 666 Part, 611 First hole waste material, 612 Second hole waste material, 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 Vertical direction, ZZ Vertical direction, ZZZ Vertical direction.

Claims

1. A press device for punching out a material and manufacturing a product, In punching out the thin portion of the product, which is formed to have a width smaller than the plate thickness of the material, A punch, a backup, a stripper and a die are included, The punch and the backup are disposed vertically opposite to each other with the material therebetween, The stripper and the die are disposed vertically opposite to each other with the material therebetween, the punch, the backup, the stripper, and the die are disposed at positions that suppress movement of the thin width portion in a planar direction; When a surface formed by cutting one side of the thin width portion in the width direction is a first surface, a surface formed by cutting the other side of the width direction is a second surface, and the first surface and the second surface are punched out in different steps, The stripper and the die are positioned to return the punched portion to the material so as to contact the first surface or the second surface previously punched; A press device that performs punching by preventing the thin width portion from rotating and falling toward the first surface side or the second surface side that was previously punched out from the area that was previously punched out and returned to the material.

2. A press device for punching material and manufacturing a product, comprising: In punching out the thin portion of the product, which is formed to have a width smaller than the plate thickness of the material, A punch, a backup, a stripper and a die are included, The punch and the backup are disposed vertically opposite to each other with the material therebetween, The stripper and the die are disposed vertically opposite to each other with the material therebetween, the punch, the backup, the stripper, and the die are disposed at positions that suppress movement of the thin width portion in a planar direction; When a surface formed by cutting one side of the thin width portion in the width direction is a first surface, a surface formed by cutting the other side of the width direction is a second surface, and the first surface and the second surface are punched out in different steps, The punch has a protruding portion that comes into contact with the first surface or the second surface that has been punched out previously, The press device performs punching by suppressing the thin width portion from rotating and falling toward the first surface side or the second surface side that has been punched out previously, wherein the protruding portion performs punching.

3. A press device for punching out material and manufacturing a product, comprising: In punching out the thin portion of the product, which is formed to have a width smaller than the plate thickness of the material, A punch, a backup, a stripper and a die are included, The punch and the backup are disposed vertically opposite to each other with the material therebetween, The stripper and the die are disposed vertically opposite to each other with the material therebetween, the punch, the backup, the stripper, and the die are disposed at positions that suppress movement of the thin width portion in a planar direction; When a surface formed by cutting one side of the thin width portion in the width direction is a first surface, a surface formed by cutting the other side of the width direction is a second surface, and the first surface and the second surface are punched out in different steps, The backup is a press device having a protrusion that abuts against the first surface or the second surface that has been previously punched out.

4. A press device for punching out material and manufacturing a product, comprising: In punching out the thin portion of the product, which is formed to have a width smaller than the plate thickness of the material, A punch, a backup, a stripper and a die are included, The punch and the backup are disposed vertically opposite to each other with the material therebetween, The stripper and the die are disposed vertically opposite to each other with the material therebetween, the punch, the backup, the stripper, and the die are disposed at positions that suppress movement of the thin width portion in a planar direction; A surface formed by cutting one side of the thin width portion in the width direction is a first surface, a surface formed by cutting the other side of the width direction is a second surface, and the first surface of the thin width portion is located on the outermost peripheral surface formed by cutting the product. After the punch has punched out at least a portion of the entire circumference of the outermost surface of the product, the backup is positioned to fit the outermost surface punched out by the punch back into the material; A press device in which the backup fits the outermost peripheral surface punched out by the punch back into the material, and the stripper and the die are positioned to press the thin width portion inside the outermost peripheral surface and the material outside the outermost peripheral surface.

5. 5. The press device according to claim 4, wherein the outermost peripheral surface is cut off in the plate thickness direction, and the punch is positioned to punch out the second surface of the thin width portion while the stripper and the die press the thin width portion inside the outermost peripheral surface and the material outside the outermost peripheral surface.

6. A press device for punching out material and manufacturing a product, comprising: In punching out the thin portion of the product, which is formed to have a width smaller than the plate thickness of the material, A punch, a backup, a stripper and a die are included, The punch and the backup are disposed vertically opposite to each other with the material therebetween, The stripper and the die are disposed vertically opposite to each other with the material therebetween, the punch, the backup, the stripper, and the die are disposed at positions that suppress movement of the thin portion in a planar direction, and punching is performed while suppressing movement of the thin portion in the planar direction; A surface formed by cutting one side of the thin width portion in the width direction is a first surface, a surface formed by cutting the other side of the width direction is a second surface, and the first surface of the thin width portion is located on the outermost peripheral surface formed by cutting the product. After the punch has punched out a part of the entire circumference of the outermost peripheral surface of the product, the backup is arranged to fit the outermost peripheral surface punched out by the punch back into the material; A press device in which the stripper and die are used to fit the outermost surface that has been half-punched by the punch back into the material, and an inner portion of the entire circumference of the outermost surface that has been fitted back is cut off in the plate thickness direction, and the stripper and die are arranged to press the thin width portion on the inside of the outermost surface and the material on the outside of the outermost surface.

7. A press device as described in Claim 6, wherein the punch is positioned so as to punch out the second surface of the thin width portion while the stripper and the die are holding the thin width portion inside the outermost surface and the material outside the outermost surface.

8. A press device as described in Claim 7, wherein after the punch punches out the second surface of the thin width portion, the punch punches out the entire circumference of the outermost surface.

9. A press device as described in Claim 5, wherein a portion of the outermost peripheral surface of the material is connected and not sheared.

10. A press device as described in Claim 7, wherein a portion of the outermost peripheral surface of the material is in an unsheared connected state.

11. A press device for punching out material and manufacturing a product, comprising: In punching out the thin portion of the product, which is formed to have a width smaller than the plate thickness of the material, A punch, a backup, a stripper and a die are included, The punch and the backup are disposed vertically opposite to each other with the material therebetween, The stripper and the die are disposed vertically opposite to each other with the material therebetween, the punch, the backup, the stripper, and the die are disposed at positions that suppress movement of the thin width portion in a planar direction; A surface formed by cutting one side of the thin width portion in the width direction is a first surface, a surface formed by cutting the other side of the width direction is a second surface, and the first surface of the thin width portion is located on the outermost peripheral surface formed by cutting the product. After the punch has punched out the second surface of the thin width portion, the stripper and the die are arranged to fit the second surface punched out by the punch back into the material and punch out the outermost peripheral surface of the product; a press device that, after a plurality of the punched products are stacked, punches out all of the second surfaces of the thin width portions of the plurality of the products.

12. The press apparatus according to claim 1 , wherein the backup is arranged to press the material against the punch.

13. The press device according to claim 1 , wherein the die is provided with a protruding portion that protrudes along a planar direction of the thin width portion.

14. Using a press device according to any one of claims 1 to 11, A method for manufacturing an iron core, in which the product punched out from the material is manufactured as an iron core for a rotating electric machine.

15. A method for manufacturing a rotating electric machine, comprising the steps of: manufacturing a rotating electric machine using the iron core manufactured by the iron core manufacturing method described in claim 14.

16. A thin-width portion is formed on an iron core of a rotating electric machine punched out of a material by a press machine, the thin-width portion having a width smaller than the plate thickness of the material, When a surface formed by cutting one side of the thin width portion in the width direction is defined as a first surface, and a surface formed by cutting the other side of the width direction is defined as a second surface, A first burr is formed on one end side of the first surface in a thickness direction thereof so as to protrude from one end face of the material in the thickness direction thereof, A second burr is formed on the other end side of the second surface in the plate thickness direction so as to protrude from the other end surface in the plate thickness direction of the material, The first burr has a crushed mark, A rotating electric machine having an iron core of the rotating electric machine, wherein the height at which the first burr protrudes from one end face in the thickness direction of the material is smaller than the height at which the second burr protrudes from the other end face in the thickness direction of the material.