JP2019054727A - Method for manufacturing laminated iron core - Google Patents

Abstract

To specify from which position a punched member is punched in the width direction of a metal plate while suppressing the complication of an apparatus when a plurality of punched members are punched from the metal plate in the width direction of the metal plate.SOLUTION: The method for manufacturing a stator laminated iron core comprises: a first step of punching an electromagnetic steel sheet W at first to Nth (N is a natural number of 2 or more) positions arranged in line in the width direction of the electromagnetic steel sheet W to form punched members 10-10; and a second step of laminating the punched members 10-10to form a stator laminated iron core. The shape or arrangement of at least one of a plurality of irregular shape parts in a punched member 10(k is a natural number of 1-N) are different from these of at least one of a plurality of irregular shape parts in a punched member 10(m is a natural number of 1-N and satisfies m≠k) so that the shapes of any two punched members 10 are not coincident with each other.SELECTED DRAWING: Figure 10

Description

  The present disclosure relates to a method of manufacturing a laminated core.

  Patent Document 1 discloses a method of punching a metal plate with a punch while intermittently feeding a coil material, which is a strip-shaped metal plate (processed plate) wound in a coil shape, intermittently at a predetermined pitch from an uncoiler. A first step of forming a plurality of punched members in the width direction, a second step of stacking the punched members to form a split core piece, and a third step of assembling the split core pieces to obtain an annular stacked core The manufacturing method of the laminated iron core containing a process is disclosed. In the first step, in order to identify from which position in the width direction of the metal plate the punching member has been punched, according to the position in the width direction (width position) of the metal plate, Identification marks are formed at different locations. Thereby, even if a defect of the punching member is found after the formation of the split core pieces or after the formation of the laminated core, it is determined from which position in the width direction the punching member is punched out of the metal plate. Can be identified.

JP 2013-013189 A

  However, the method described in Patent Document 1 requires a punch and a die for forming an identification mark. Therefore, the number of punches and dies increases, and the structure of an apparatus for manufacturing a laminated core can be complicated.

  In view of this, the present disclosure discloses that when a plurality of punching members are punched from the metal plate in the width direction of the metal plate, the punching member is punched from any position in the width direction of the metal plate while suppressing complication of the apparatus. A method for manufacturing a laminated iron core capable of specifying whether the core has been removed will be described.

  [1] A method for manufacturing a laminated core according to one aspect of the present disclosure includes a predetermined first at a position of first to Nth (N is a natural number of 2 or more) arranged in a line in the width direction of a strip-shaped metal plate. A first step of punching a metal plate along the Nth punching shape to form first to Nth punching members respectively corresponding to the first to Nth punching shapes, and laminating a plurality of punching members And a second step of forming a laminate. Each of the first to Nth punching members is formed with a plurality of deformed portions having a concave shape or a convex shape at positions where they overlap each other at the time of lamination in the second step. The kth (k is a natural number from 1 to N) punched member and the kth (m is a natural number satisfying 1 to N and m ≠ k) punched member shape do not match each other. The shape or arrangement of at least one deformed portion of the plurality of deformed portions in the punching member is different from the shape or arrangement of at least one deformed portion of the plurality of deformed portions in the mth punching member.

  In the method for manufacturing a laminated core according to one aspect of the present disclosure, the first to Nth punched members punched from the metal plate in the first step are respectively positioned so as to overlap each other at the time of stacking in the second step. A plurality of deformed portions having a concave shape or a convex shape are formed. The shape or arrangement of at least one deformed portion of the plurality of deformed portions in the kth punching member is such that the shape of the kth punching member and the shape of the mth punching member do not coincide with each other. It is different from the shape or arrangement of at least one deformed portion among the plurality of deformed portions in the punching member. Therefore, since the shapes of the punching members punched at the first to Nth positions in the width direction of the metal plate are different from each other, any punching member is any of the first to Nth positions. It is possible to specify whether it was punched at the position. Here, various deformed portions may be formed on the punched member for the convenience of manufacturing the laminated iron core. In the method for manufacturing a laminated core according to one aspect of the present disclosure, the shape of the kth punching member and the shape of the mth punching member are distinguished by the shape or arrangement of the deformed portion. Therefore, since different punching members can be identified using existing punches and dies for forming the deformed portion, it is necessary to newly add punches and dies for identifying the punching members. Absent. From the above, it is possible to specify from which position in the width direction of the metal plate the punching member is punched while suppressing complication of the apparatus.

  [2] In the method described in the above item 1, the deformed portion is formed on the periphery of each of the first to Nth punching members, and a welded portion for welding the punching members to each other, a metal plate of the punching member It may be any one of a fitting part that fits with the mold when punching out from the die, or a roll-out identifying part for identifying the roll-out. In the case where the deformed portion is a welded portion, the deformed portion can have two functions of a punching position identifying function and a welding function. When the deformed portion is a fitting portion, the deformed portion can have two functions of a punching member identification function and a fitting function. In the case where the deformed portion is a roll-off identifying portion, the deformed portion can have two functions of a punching position identifying function of the punching member and an identifying function identifying the rolled state.

  [3] In the method described in the first or second item, the punching member may have an annular shape.

  [4] In the method according to any one of the above items 1 to 3, in the second step, a laminated body is obtained by rolling a punched member or a block body in which a predetermined number of punched members are laminated. May be formed.

  [5] In the method according to any one of the above items 1 to 4, in the first step, an identification mark for identifying the front and back of the punched member may be formed. In this case, even if the shapes of two different punching members match when the front and back are turned over, it is possible to specify at which position of the metal plate the punching members are punched. Therefore, the number of patterns of the shape of the punching member without duplication can be increased by using the identification mark in addition to the shape type of the deformed portion.

  According to the method for manufacturing a laminated core according to the present disclosure, when a plurality of punching members are punched from the metal plate in the width direction of the metal plate, the punching member is the metal plate of the metal plate while suppressing complication of the apparatus. It is possible to specify from which position in the width direction the punching has been performed.

FIG. 1 is a perspective view showing an example of a stator laminated iron core. FIG. 2 is a top view showing an example of the punching member. FIG. 3 is a schematic diagram illustrating an example of the shape of the deformed portion. FIG. 4 is a diagram illustrating an example of a layout of a deformed portion in the punching member. FIG. 5 is a diagram illustrating an example of a layout of a deformed portion in the punching member. FIG. 6 is a side view mainly showing an example of a deformed portion of the stator laminated core. FIG. 7 is a schematic view illustrating an example of a manufacturing apparatus for a stator laminated core. FIG. 8 is a schematic view showing an example of a punching device. FIG. 9 is a cross-sectional view schematically showing a mechanism for stacking the punching members and a mechanism for discharging the stator laminated core from the die plate. FIG. 10 is a diagram showing an example of the layout of the punching process. FIG. 11 is a top view showing another example of the stamped member of the stator laminated core. FIG. 12 is a top view showing an example of a punched member of a rotor laminated core.

  Since the embodiment according to the present disclosure described below is an example for explaining the present invention, the present invention should not be limited to the following contents. In the following description, the same reference numerals are used for the same elements or elements having the same function, and redundant description is omitted.

[Stator laminated core]
First, the configuration of the stator laminated core 1 will be described with reference to FIG. The stator laminated iron core 1 (stator) has a cylindrical shape. That is, a through hole 1 a extending along the central axis Ax is provided in the central portion of the stator laminated core 1. A rotor laminated core (rotor) (not shown) can be disposed in the through hole 1a. The stator laminated iron core 1 constitutes an electric motor (motor) together with the rotor laminated iron core.

  The stator laminated core 1 is a laminated body in which a plurality of punching members 10 are stacked. The stator laminated iron core 1 includes a yoke portion 2, a plurality of teeth portions 3 (six teeth portions 3 in FIG. 1), and a plurality of ear metal portions 4 (three ear metal portions 4 in FIG. 1). Have.

  The yoke portion 2 has an annular shape and extends so as to surround the central axis Ax. The width of the yoke part 2 in the radial direction, the inner diameter of the yoke part 2, the outer diameter of the yoke part 2, and the thickness of the yoke part 2 can be set to various sizes according to the application and performance of the motor.

  A plurality of deformed portions 5 (six deformed portions in FIG. 1) are provided on the outer peripheral edge of the yoke portion 2. Each deformed portion 5 is recessed toward the central axis Ax. The deformed portions 5 are arranged at substantially equal intervals in the circumferential direction of the yoke portion 2 (hereinafter simply referred to as “circumferential direction”). Each deformed portion 5 extends linearly from one end surface to the other end surface of the stator laminated core 1 in the lamination direction of the stator laminated core 1 (hereinafter simply referred to as “lamination direction”).

  An identification mark 6 is formed on the surface of the yoke portion 2. The identification mark 6 functions as a mark for identifying the surface of the yoke portion 2. The identification mark 6 is a character, a figure, or the like printed by a laser marker, for example. A mark may not be formed on the back surface of the yoke portion 2, or a mark different from the identification mark 6 may be formed. Thereby, the front surface and the back surface of the punching member 10 can be distinguished.

  Each tooth portion 3 extends along the radial direction of the stator laminated core 1 (hereinafter simply referred to as “radial direction”) from the inner edge of the yoke portion 2 toward the central axis Ax. In the stator laminated core 1 shown in FIG. 1, each tooth portion 3 is integrally formed with the yoke portion 2.

  The teeth portions 3 are arranged at substantially equal intervals in the circumferential direction. The width of each tooth part 3 in the circumferential direction, the length of each tooth part 3 in the radial direction, the interval between adjacent tooth parts 3, and the thickness of each tooth part 3 vary depending on the application and performance of the motor. Can be set to a size of

  When the stator laminated iron core 1 is configured as a motor, a winding (not shown) is wound around each tooth portion 3 a predetermined number of times. A slot 1b, which is a space for arranging the windings, is defined between the adjacent tooth portions 3. Each teeth part 3 is provided with a caulking part 7. The caulking portion 7 joins the punching members 10 adjacent in the stacking direction.

  Each ear metal part 4 protrudes radially outward from the outer edge of the yoke part 2 so as to be away from the central axis Ax. The ear metal parts 4 are arranged at substantially equal intervals in the circumferential direction. Each ear metal part 4 extends linearly from one end surface to the other end surface of the stator laminated core 1 in the central axis Ax direction.

  Each ear metal part 4 is provided with a through hole 4a that penetrates the metal ear part 4 in the stacking direction. The through hole 4a functions as a bolt insertion hole for fixing the stator laminated iron core 1 to a motor housing (not shown).

  The punching member 10 is obtained, for example, by processing (for example, punching, cutting and bending) the electromagnetic steel sheet W (see FIGS. 6 to 9). When the punching member 10 is not provided with temporary crimping, the shape of the punching member 10 viewed from the central axis Ax direction is substantially the same as the shape of the stator laminated core 1 viewed from the central axis Ax direction (see FIG. 1 and FIG. 1). (See FIG. 2). Therefore, the punching member 10 also has an annular shape as seen from the direction of the central axis Ax, as shown in FIG. A through hole 10 a is provided in the central portion of the punching member 10.

  The punching member 10 includes a yoke portion 12, a plurality of teeth portions 13 (six teeth portions 13 in FIG. 2), and a plurality of ear metal portions 14 (three ear metal portions 14 in FIG. 1). The yoke part 12, the teeth part 13 and the ear metal part 14 correspond to the yoke part 2, the tooth part 3 and the metal ear part 4 of the stator laminated core 1, respectively. Therefore, the shape of the yoke part 12, the teeth part 13, and the ear metal part 14 is the same shape as the yoke part 2, the teeth part 3, and the ear metal part 4 of the stator laminated core 1, respectively. That is, when the punching member 10 is laminated to form the stator laminated core 1, the yoke portion 12 of the punching member 10 becomes the yoke portion 2 of the stator laminated core 1, and the teeth portion 13 of the punching member 10 is the stator laminated core. 1, and the ear metal part 14 of the punching member 10 becomes the ear metal part 4 of the stator laminated core 1.

  A plurality of deformed portions 15 (six deformed portions 15 </ b> A to 15 </ b> F in FIG. 1) are provided on the outer peripheral edge of the yoke portion 12. Each deformed portion 15 is recessed toward the central axis Ax. The deformed portions 15 are arranged at substantially equal intervals in the circumferential direction of the yoke portion 12. In FIG. 2, the deformed portions 15A to 15F are arranged in this order in the clockwise direction when viewed from above. An identification mark 6 is formed on the surface of the yoke portion 12.

  A slot 10b, which is a space for arranging windings, is defined between the adjacent tooth portions 13. The ear metal part 14 is provided with a through hole 14a that penetrates the metal ear part 14 in the central axis Ax direction.

  Here, the deformed portion 15 has one shape selected from a plurality of different types. For example, the deformed portion 15 may be any one of the three types of shapes a to c shown in FIGS. Therefore, in the punching member 10 shown in FIG. 2, each of the deformed portions 15A to 15F can take three shapes a to c.

  As illustrated in FIG. 3A, the shape a is a notch configured by a convex portion a <b> 1 and a pair of concave portions a <b> 2. The convex portion a1 has an arc shape protruding toward the side away from the central axis Ax (the radially outer side of the punching member 10). The pair of concave portions a2 has an arc shape that is recessed toward the central axis Ax, and is located on both sides of the convex portion a1. Each inner end of the pair of concave portions a2 is connected to each end of the convex portion a1. Each outer end of the pair of concave portions a <b> 2 is connected to the outer peripheral edge of the punching member 10.

  As shown in FIG. 3B, the shape b is a notch formed by a convex portion b1, a pair of concave portions b2, and a straight portion b3. The convex portion b1 has an arc shape protruding toward the side away from the central axis Ax (the radially outer side of the punching member 10). The pair of concave portions b2 has an arc shape that is recessed toward the central axis Ax, and is located on both sides of the convex portion b1. Each inner end of the pair of concave portions b2 is connected to each end of the convex portion b1. The outer end of one concave portion b <b> 2 is connected to the outer peripheral edge of the punching member 10. The straight line portion b <b> 3 extends linearly along the radial direction of the punching member 10. The straight line portion b3 connects the outer end of the other concave portion b2 and the outer peripheral edge of the punching member 10. The opening width d2 of the shape b is set smaller than the opening width d1 of the shape 15a (d1> d2).

  As illustrated in FIG. 3C, the shape c is a notch that includes a convex portion c <b> 1, a pair of concave portions c <b> 2, and a pair of straight portions c <b> 3. The convex portion c1 has an arc shape protruding toward the side away from the central axis Ax (the radially outer side of the punching member 10). The pair of concave portions c2 has an arc shape that is recessed toward the central axis Ax, and is located on both sides of the convex portion c1. Each inner end of the pair of concave portions c2 is connected to each end of the convex portion c1. Both of the pair of straight portions c3 extend linearly along the radial direction of the punching member 10. One linear portion c3 connects the outer end of one concave portion c2 and the outer peripheral edge of the punching member 10. The other straight line portion c3 connects the outer end of the other concave portion c2 and the outer peripheral edge of the punching member 10. The opening width d3 of the shape c is set to be smaller than the opening width d2 of the shape b (d2> d3).

  In the punching member 10 shown in FIG. 2, the position and shape of the deformed portion are expressed by a combination of the symbols 15A to 15F indicating the position of the deformed portion 15 and the symbols a to c indicating the shape of the deformed portion 15. be able to. For example, in the punching member 10A illustrated in FIG. 4A, the deformed portions 15A and 15B have the shape c, the deformed portions 15C and 15D have the shape b, and the deformed portions 15E and 15F have the shape a. Therefore, the punching member 10A of FIG. 4A has deformed portions 15Ac, 15Bc, 15Cb, 15Db, 15Ea, and 15Fa.

  Similarly, the punching member 10B illustrated in FIG. 4B has deformed portions 15Aa, 15Bc, 15Cc, 15Db, 15Eb, and 15Fa. The punching member 10C illustrated in FIG. 4C has deformed portions 15Ab, 15Bc, 15Ca, 15Db, 15Ec, and 15Fa. The punching member 10D illustrated in FIG. 4D has deformed portions 15Ac, 15Bb, 15Ca, 15Dc, 15Eb, and 15Fa.

  The punching member 10E illustrated in FIG. 5A has deformed portions 15Aa, 15Bc, 15Cb, 15Dc, 15Eb, and 15Fa. The punching member 10F illustrated in FIG. 5B has deformed portions 15Ab, 15Bb, 15Cc, 15Da, 15Ea, and 15Fa. The punching member 10G illustrated in FIG. 5C has deformed portions 15Ab, 15Bb, 15Cb, 15Da, 15Ea, and 15Fa. The punching member 10H illustrated in FIG. 5D has deformed portions 15Aa, 15Ba, 15Ca, 15Db, 15Ea, and 15Fa.

  The number of combinations of the positions and shapes of the deformed portions 15 is determined by a circular permutation or a necklace permutation method depending on the presence or absence of the ear metal portion 14 and the presence or absence of the identification mark 6. Can do.

  The stator laminated core 1 may be configured by so-called inversion. “Rolling” refers to relative shifting of the angle between the punching members 10 when laminating a plurality of punching members 10 to obtain the stator laminated core 1, and stacking while rotating the punching members 10. including. Rolling is performed mainly for the purpose of offsetting the thickness deviation of the punching member 10. In obtaining the stator laminated core 1, the punching members 10 may be rolled up one by one, or may be rolled up every unit block 20 (see FIG. 6) in which a predetermined number of punching members 10 are stacked. . The roll angle may be set to an arbitrary size as long as the ear metal parts 14 of the punching member 10 overlap each other. For example, in the present embodiment, since the punching member 10 has the three ear metal parts 14, the angle of rollover may be set to 120 °. In addition, when the unit blocks 20 are rolled, the number of unit blocks 20 to be stacked may be a times the number of the ear metal parts 14 of the punching member 10 (a is a natural number of 1 or more). In this case, it is possible to improve the flatness, parallelism and perpendicularity of the obtained stator laminated core 1.

  In FIG. 6, for example, the punching member 10 </ b> A illustrated in FIG. 4A is a unit block 20, and an example of the stator laminated core 1 manufactured by rolling the unit block 20 while shifting the unit block 20 by 120 °. Show. Since the shapes (widths) of the shapes a to c are different, the boundaries of the unit blocks 20 can be easily recognized as shown in FIG. Thereby, when joining the unit blocks 20 by welding, the boundary part of the unit blocks 20 can be welded by a pinpoint. Therefore, since the size of the welded portion 21 that joins the unit blocks 20 can be reduced, the influence of the welded portion 21 on the magnetic characteristics of the stator laminated core 1 can be reduced.

[Stator laminated iron core manufacturing equipment]
Then, with reference to FIG. 7, the manufacturing apparatus 100 of the stator laminated core 1 is demonstrated. The manufacturing apparatus 100 is an apparatus for manufacturing the stator laminated core 1 from the electromagnetic steel plate W (working plate) which is a strip-shaped metal plate. The manufacturing apparatus 100 includes an uncoiler 110, a delivery device 120 (a delivery unit), a punching device 130, and a controller 150 (a control unit).

  The uncoiler 110 rotatably holds the coil material 111 in a state in which the coil material 111 that is a strip-shaped electromagnetic steel sheet W wound in a coil shape is mounted. The feeding device 120 includes a pair of rollers 121 and 122 that sandwich the electromagnetic steel sheet W from above and below. The pair of rollers 121 and 122 rotate and stop based on an instruction signal from the controller 150, and intermittently sequentially feed the electromagnetic steel sheet W toward the punching device 130.

  The length of the electromagnetic steel plate W constituting the coil material 111 may be, for example, about 500 m to 10000 m. The thickness of the electromagnetic steel sheet W may be, for example, about 0.1 mm to 0.5 mm. The thickness of the electromagnetic steel plate W may be, for example, about 0.1 mm to 0.3 mm from the viewpoint of obtaining the stator laminated core 1 having more excellent magnetic characteristics. The width of the electromagnetic steel sheet W may be, for example, about 50 mm to 500 mm.

  The controller 150 generates and sends instruction signals for operating the sending device 120 and the punching device 130 based on, for example, a program recorded on a recording medium (not shown) or an operation input from the operator. Transmit to the device 120 and the punching device 130.

[Punching device]
Next, the punching device 130 will be described with reference to FIGS. The punching device 130 is formed by punching the magnetic steel sheets W intermittently delivered by the delivery device 120 to form the punching member 10 and the stacking members 10 obtained by the punching are stacked and fixed in order. And a function of manufacturing the child laminated core 1.

  7 and 8, the punching device 130 includes a base 131, a lower die 132, a die plate 133, a stripper 134, an upper die 135, a top plate 136, and a press machine 137 (drive unit). And suspenders 138, punches A1 to A6, and pressing pins B1 to B6. The base 131 supports the lower mold 132 placed on the base 131.

  The lower mold 132 holds the die plate 133 placed on the lower mold 132. The lower mold 132 is provided with discharge holes C1 to C6 through which materials punched from the electromagnetic steel sheet W (for example, the punching member 10, waste materials, etc.) are discharged, at positions corresponding to the punches A1 to A6. As shown in FIG. 9, a cylinder 132a, a stage 132b, and a pusher 132c are arranged in the discharge hole C6.

  The cylinder 132a supports the punching member 10 in order to prevent the punching member 10 punched from the electromagnetic steel sheet W by the punch A6 from falling downward. The cylinder 132a is configured to be movable in the vertical direction based on an instruction signal from the controller 150. Specifically, the cylinder 132a intermittently moves downward every time the punching member 10 is stacked on the cylinder 132a. When a predetermined number of punching members 10 are stacked on the cylinder 132a and the stator laminated core 1 is formed, the cylinder 132a moves to a position where the surface of the cylinder 132a is flush with the surface of the stage 132b.

  The stage 132b is provided with a hole through which the cylinder 132a can pass. The pusher 132c is configured to be movable in the horizontal direction on the surface of the stage 132b based on an instruction signal from the controller 150. With the cylinder 132a moved to a position where the surface of the cylinder 132a is flush with the surface of the stage 132b, the pusher 132c pays out the stator laminated core 1 from the cylinder 132a to the stage 132b. The stator laminated iron core 1 delivered to the stage 132b is transported outside the manufacturing apparatus 100.

  Returning to FIG. 8, the die plate 133 has a function of forming the punching member 10 together with the punches A1 to A6. The die plate 133 is provided with dies D1 to D6 at positions corresponding to the punches A1 to A6, respectively. Each of the dies D1 to D6 is provided with through holes D1a to D6a (die holes) that extend in the vertical direction and communicate with the corresponding discharge holes C1 to C6. The diameter of each of the through holes D1a to D6a is such that the tip of the corresponding punch A1 to A6 can be inserted and is slightly smaller than the tip. The die plate 133 is provided with insertion holes E1 to E6 at positions corresponding to the pressing pins B1 to B6.

  The stripper 134 includes a stripper plate 134a and a holding plate 134b. The stripper plate 134a has a function of removing, from the punches A1 to A6, the electromagnetic steel sheet W that has bitten into the punches A1 to A6 when the electromagnetic steel sheet W is punched with the punches A1 to A6. The stripper plate 134 a is located above the die plate 133. The holding plate 134b holds the stripper plate 134a from above.

  The stripper 134 is provided with through holes F1 to F6 at positions corresponding to the punches A1 to A6. Each of the through holes F1 to F6 extends in the vertical direction, and communicates with the corresponding through holes D1a to D6a of the dies D1 to D6 when the stripper plate 134a contacts the die plate 133. The lower portions of the punches A1 to A6 are inserted into the through holes F1 to F6, respectively. The lower portions of the punches A1 to A6 can slide in the through holes F1 to F6, respectively.

  The stripper 134 is provided with through holes F7 to F12 at positions corresponding to the pressing pins B1 to B6. Each of the through holes F7 to F12 extends in the vertical direction and communicates with the corresponding insertion holes E1 to E6 when the stripper plate 134a contacts the die plate 133. The lower portions of the pressing pins B1 to B6 are inserted into the through holes F7 to F12, respectively. The lower portions of the pressing pins B1 to B6 are slidable in the through holes F7 to F12, respectively.

  The upper mold 135 is located above the stripper 134. To the upper mold 135, the bases (upper parts) of the punches A1 to A6 and the pressing pins B1 to B6 are fixed. Therefore, the upper mold 135 holds the punches A1 to A6 and the pressing pins B1 to B6. The upper mold 135 has an end portion on the upstream side and a downstream side of the punching device 130, which is located on the top plate 136 side and extends in the vertical direction, and a penetration that penetrates downward from the accommodation space 135 a. A hole 135b is provided.

  The top plate 136 is located above the upper mold 135. The top plate 136 holds the upper mold 135. The press machine 137 is located above the top plate 136. The piston of the press machine 137 is connected to the top plate 136 and operates based on an instruction signal from the controller 150. When the press machine 137 operates, the piston expands and contracts, and the stripper 134, the upper die 135, the top plate 136, the hanger 138, the punches A1 to A6, and the pressing pins B1 to B6 (hereinafter referred to as the movable portion 160). Moves up and down as a whole.

  The hanger 138 suspends the stripper 134 from the upper mold 135 and holds it. The hanger 138 has a long rod portion 138a and a head portion 138b provided at the upper end of the rod portion 138a. The lower end portion of the rod portion 138a is fixed to the stripper 134. The upper end portion of the rod portion 138a is inserted into the through hole 135b of the upper die 135. The head portion 138 b has a diameter larger than that of the lower end portion and is accommodated in the accommodation space 135 a of the upper die 135. Therefore, the head 138b can move up and down with respect to the upper mold 135 in the accommodation space 135a.

  The punches A1 to A6 have a function of punching the electromagnetic steel sheet W into a predetermined shape together with the die plate 133 (dies D1 to D6). The punches A1 to A6 are arranged so as to be arranged in this order from the upstream side (the delivery device 120 side) to the downstream side of the punching device 130. In the width direction of the electrical steel sheet W (hereinafter simply referred to as “width direction”), a plurality of punches A1 are arranged in a line. A plurality of punches A2 are arranged in a line in the width direction. A plurality of punches A3 are arranged in a line in the width direction. A plurality of punches A4 are arranged in a line in the width direction. A plurality of punches A5 are arranged in a line in the width direction. A plurality of punches A6 are arranged in a line in the width direction.

  The tip shape of each punch A1 is almost the same. That is, the punching shape of the electromagnetic steel sheet W by each punch A1 is almost the same. The tip shapes of the plurality of punches A2 are almost the same. That is, the punching shape of the electromagnetic steel sheet W by each punch A2 is substantially the same. The tip shapes of the punches A3 are different from each other. That is, the punching shapes of the electromagnetic steel sheets W by the punches A3 do not match each other.

  The tip shape of each punch A4 is almost the same. That is, the punching shape of the electromagnetic steel sheet W by each punch A4 is almost the same. The tip shape of each punch A5 is substantially the same. That is, the punching shape of the electromagnetic steel sheet W by each punch A5 is almost the same. The tip shape of each punch A6 is substantially the same. That is, the punching shape of the electromagnetic steel sheet W by each punch A6 is almost the same.

  The holding pins B1 to B6 have a function of pressing the electromagnetic steel sheet W against the die plate 133 when the electromagnetic steel sheet W is punched by the punches A1 to A6. The holding pins B1 to B6 are arranged so as to be arranged in this order from the upstream side (the delivery device 120 side) to the downstream side of the punching device 130.

[Method for manufacturing stator core]
Then, with reference to FIGS. 7-10, the manufacturing method of the stator laminated core 1 is demonstrated. First, when the electromagnetic steel sheet W is sent to the punching device 130 by the delivery device 120 and the processed portion of the electromagnetic steel sheet W reaches the punch A1, the controller 150 instructs the press machine 137, and the press machine 137 moves the movable part 160. Push down toward the die plate 133. Even after the stripper 134 reaches the die plate 133 and the electromagnetic steel sheet W is sandwiched between them, the controller 150 instructs the press machine 137 to push the movable part 160 downward.

  At this time, the stripper 134 does not move, but the tip portions of the punches A1 to A6 and the holding pins B1 to B6 move in the through holes F1 to F12 of the stripper plate 104, and the corresponding through holes D1a to D1 in the die plate 133 are moved. It reaches D6a and the insertion holes E1 to E6. Therefore, the electromagnetic steel sheet W is punched along the predetermined punching shape by the punch A1, and a pair of through holes W1 are formed in the vicinity of both side edges of the electromagnetic steel sheet W (see position S1 in FIGS. 8 and 10). That is, the pair of through holes W1 are arranged in a line in the width direction. The punched waste material is discharged from the discharge hole C1 of the lower mold 132. Thereafter, the press machine 137 operates to raise the movable part 160.

  Next, when the electromagnetic steel sheet W is sent out by the feeding device 120 and the processed portion of the electromagnetic steel sheet W reaches the punch A2, the controller 150 instructs the press machine 137, and the press machine 137 moves the movable part 160 up and down. Thus, the electromagnetic steel sheet W is punched along a predetermined punching shape by the plurality of punches A2 arranged in a line in the width direction, and a plurality of punched portions W2 are formed in the electromagnetic steel sheet W (position S3 in FIGS. 8 and 10). reference). That is, the plurality of punched portions W2 are arranged in a line in the width direction.

  Each punched portion W2 is configured by six through holes arranged in a circular shape in FIG. Each through hole corresponds to the slot 10 b of the punching member 10. The punched waste material is discharged from the discharge hole C2 of the lower mold 132. When the electromagnetic steel sheet W is punched by the punch A2, the pressing pins B1 and B2 are inserted into the through hole W1 and the insertion holes E1 and E2 (see positions S2 and S4 in FIGS. 8 and 10).

Next, when the electromagnetic steel sheet W is sent out by the feeding device 120 and the processed part of the electromagnetic steel sheet W reaches the punch A3, the controller 150 instructs the press machine 137, and the press machine 137 moves the movable part 160 up and down. Thereby, the electromagnetic steel sheet W is punched along a predetermined punching shape by the plurality of punches A3 arranged in a line in the width direction, and a plurality of punched portions W3 _{1 to} W3 _N (N is a natural number of 2 or more) are formed in the electromagnetic steel sheet W. It is formed (see position S5 in FIGS. 8 and 10). That is, the plurality of punched portions W3 _{1 to} W3 _N are arranged in a line in the width direction.

Each punching portion W3 _{1 to} W3 _N is configured by six through holes arranged in a circle in FIG. The inner peripheral edge of each through hole corresponds to the deformed portion 15 of the punching member 10. Here, since the tip shapes of the plurality of punches A3 arranged in a line in the width direction are different from each other, the punched shapes of the punched portions W3 _{1 to} W3 _N (the shapes of the inner peripheral edges of the through holes) are mutually coincident. do not do. The punched waste material is discharged from the discharge hole C3 of the lower mold 132. When the electromagnetic steel sheet W is punched by the punch A3, the pressing pins B2 and B3 are inserted into the through hole W1 and the insertion holes E2 and E3 (see positions S4 and S6 in FIGS. 8 and 10).

  Next, when the electromagnetic steel sheet W is sent out by the delivery device 120 and the processed portion of the electromagnetic steel sheet W reaches the punch A4, the controller 150 instructs the press machine 137, and the press machine 137 moves the movable part 160 up and down. As a result, the electromagnetic steel sheet W is punched or half-punched along a predetermined punching shape by the plurality of punches A4 arranged in the width direction, and a plurality of processed portions W4 are formed on the electromagnetic steel sheet W (FIGS. 8 and 10). Position S7). That is, the plurality of processed portions W4 are arranged in a line in the width direction.

  Each processed portion W4 is configured by six through holes or uneven portions arranged in a circular shape in FIG. Each through hole corresponds to the through hole of the caulking portion 7. Each uneven portion corresponds to the caulking of the caulking portion 7. When each processed portion W4 is a through hole, the punched waste material is discharged from the discharge hole C4 of the lower mold 132. When the electromagnetic steel sheet W is punched by the punch A4, the pressing pins B3 and B4 are inserted into the through hole W1 and the insertion holes E3 and E4 (see positions S6 and S8 in FIGS. 8 and 10).

  Next, when the electromagnetic steel sheet W is sent out by the delivery device 120 and the processed part of the electromagnetic steel sheet W reaches the punch A5, the controller 150 instructs the press machine 137, and the press machine 137 moves the movable part 160 up and down. Thereby, the electromagnetic steel sheet W is punched by the plurality of punches A5 arranged in a line in the width direction, and a plurality of punched portions W5 are formed on the electromagnetic steel sheet W (see position S9 in FIGS. 8 and 10). That is, the plurality of punched portions W5 are arranged in a line in the width direction.

  In FIG. 10, each punched portion W5 is configured by a central through hole surrounded by the punched portion W2 and three through holes arranged in a circle outside the punched portion W2. One through hole in the center corresponds to the through hole 10 a of the punching member 10. The three through holes on the outer circumference correspond to the through holes 14 a of the punching member 10. The punched waste material is discharged from the discharge hole C5 of the lower mold 132. When the electromagnetic steel sheet W is punched by the punch A5, the pressing pins B4 and B5 are inserted into the through hole W1 and the insertion holes E4 and E5 (see positions S8 and S10 in FIGS. 8 and 10).

  Next, when the electromagnetic steel sheet W is sent out by the feeding device 120 and the processed part of the electromagnetic steel sheet W reaches the punch A6, the controller 150 instructs the press machine 137, and the press machine 137 moves the movable part 160 up and down. Thus, the electromagnetic steel sheet W is punched along a predetermined punching shape by the plurality of punches A6 arranged in a line in the width direction, and a plurality of punched portions W6 are formed in the electromagnetic steel sheet W (position S11 in FIGS. 8 and 10). reference). That is, the plurality of punched portions W6 are arranged in a line in the width direction. In other words, the punched portions W6 are located at the first to Nth positions arranged in a line in the width direction.

Each punched portion W6 has an annular shape corresponding to the shape of the outer peripheral edge of the punched member 10 excluding the deformed portion 15 in FIG. Thereby, a plurality of punching members 10 ₁ to 10 _N are formed in the width direction (see position S11 in FIGS. 8 and 10). When the electromagnetic steel sheet W is punched by the punch A6, the pressing pins B5 and B6 are inserted into the through hole W1 and the insertion holes E5 and E6 (see positions S10 and S12 in FIGS. 8 and 10). Thus, the punching members 10 ₁ to 10 _N are placed on the cylinder 132a in the discharge hole C6, and are stacked while being joined to the punched members 10 ₁ to 10 _{N that} are punched next. By repeating the above steps, the stator laminated iron core 1 is formed. The identification mark 6 may be formed by a laser marker or the like after the punching member 10 is discharged from the mold (lower mold 132 and upper mold 135) and reaches the discharge hole C6.

Here, since the punching shapes of the punched portions W3 _{1 to} W3 _N do not match each other, the shapes of the punching members 10 ₁ to 10 _N also do not match each other. For example, when N = 2, the punching member 10A illustrated in FIGS. 4 (a) is formed as a punched member 10 _1, and the punching member 10B illustrated in FIG. 4 (b) are formed as punching member 10 ₂ Also good. At this time, in the punching member 10 ₁ and the punching member 10 _2, unlike in the shape of irregular portion 15A is the c and a, unlike the shape of the profile portion 15C is in the b and c, the shape of the profile portion 15E is a and b And is different. Thus, at least one shape or arrangement of the profiled portion 15 of the plurality of profiled portions 15 in the punching member 10 _1, and at least one shape or arrangement of the profiled portion 15 of the plurality of profiled portions 15 in the punching member 10 ₂ different ing.

[Action]
In the present embodiment as described above, the plurality of deformed portions 15 are formed in the positions where the punching members 10 ₁ to 10 _N punched from the electromagnetic steel sheet W overlap each other at the time of lamination. In the present embodiment, the shape of the punching member 10 _k (k is a natural number of 1 to N) and the shape of the punching member 10 _m (m is a natural number satisfying 1 to N and m ≠ k) do not match each other. The shape or arrangement of at least one deformed portion of the plurality of deformed portions 15 in the punching member 10 _k is different from the shape or arrangement of at least one deformed portion of the plurality of deformed portions 15 in the punching member 10 _m . Therefore, since the shapes of the punching members 10 ₁ to 10 _N punched at the _first to _Nth positions in the width direction of the electromagnetic steel sheet W are different from each other, the arbitrary punching members 10 are the first to first punches. Which of the N positions is punched can be specified.

In the present embodiment, a plurality of deformed portions 15 are formed in the punching member 10 for the convenience of manufacturing the stator laminated core 1. The shape or arrangement of the deformed portion 15 distinguishes the shape of the punching member 10 _{k from} the shape of the punching member 10 _m . Therefore, since different punching members 10 can be identified using existing punches and dies for forming the deformed portion 15, punches and dies for identifying the punching members 10 are newly added. There is no need to do. As described above, it is possible to specify from which position in the width direction of the electromagnetic steel sheet W the punching member 10 is punched while suppressing the complication of the apparatus.

  In the present embodiment, the deformed portion 15 has a function for identifying the punching position of the punching member 10, a function as a welded portion 21 for joining the punching members 10 to each other by welding, and a boundary for rollover. It has three functions together with the function as the inversion identification unit. Therefore, it is not necessary to separately provide the punching member 10 with members and shapes for exhibiting these functions.

  In the present embodiment, an identification mark 6 for identifying the front and back of the punching member 10 is formed on the punching member 10. Therefore, even if the shapes of two different punching members 10 match when the front and back are turned over, it is possible to specify at which position of the electromagnetic steel sheet W the punching members 10 are punched. Therefore, the number of patterns of the shape of the punching member 10 having no overlap can be increased by using the identification mark 6 in addition to the type of the shape of the deformed portion 15.

[Other Embodiments]
As mentioned above, although embodiment concerning this indication was described in detail, you may add various deformation | transformation to said embodiment within the range of the summary of this invention. For example, the identification mark 6 may not be provided on the punching member 10.

  The punching member 10 may have an annular shape other than an annular shape. The punching member 10 may not have an annular shape. That is, the punching member 10 may be a single piece of metal that forms a ring and forms a split-type laminated iron core when a plurality of punching members 10 are combined.

  In order to fasten the plurality of punching members 10, various known methods may be employed in addition to or in place of the crimping portion 7. For example, the plurality of punching members 10 may be fastened by joining, welding, or the like using an adhesive or a resin material. Among these, from the viewpoint of low cost and work efficiency, a plurality of punching members 10 may be fastened by caulking or welding. On the other hand, a plurality of punching members 10 may be fastened by bonding using an adhesive or a resin material from the viewpoint of high torque and low iron loss in the motor. In addition, a temporary crimping plate (not shown) on which temporary crimping is formed is provided on the punching member 10, and a plurality of punching members 10 are fastened via the temporary crimping of the temporary crimping plate to obtain an intermediate body. You may obtain the stator lamination | stacking iron core 1 by removing the temporary crimping block in which the board was laminated | stacked from an intermediate body. The “temporary caulking” means caulking used to temporarily integrate a plurality of punching members 10.

  In addition to the function for identifying the punching position of the punching member 10, the deformed portion 15 may have another function for convenience in manufacturing the stator laminated core 1. For example, as shown in FIG. 11, the deformed portion 15 may be a notch configured so that the punching member 10 can engage with the protrusion of the die D <b> 6. In this case, when the punching member 10 is punched from the electromagnetic steel sheet W by the punch A6, the deformed portion 15 formed on the outer peripheral edge of the punching member 10 (yoke portion 12) is fitted with the protrusion of the die D6. When A6 is pulled out from the die D6, the punching member 10 can be prevented from jumping out of the die D6 along with the punch A6. That is, in the embodiment of FIG. 11, the deformed portion 15 has a function for identifying the punching position of the punching member 10 and a function as a fitting portion for fitting the punching member 10 to the die D6. Have both.

  The shape of the deformed portion 15 is not particularly limited, and may be a concave shape, a convex shape, or an uneven shape.

  The deformed portion 15 may be formed in the ear metal portion 14 of the punching member 10. In other words, the deformed portion 5 may be formed on the ear metal portion 4 of the stator laminated core 1. At this time, a protrusion, a notch, or a concavo-convex portion is provided on the metal ear portion 14 (metal ear portion 4). Also in this case, the deformed portion 15 has a function for identifying the punching position of the punching member 10, a function as a welded portion 21 for joining the punching members 10 to each other by welding, and a rolling for identifying the boundary of rolling. It can have three functions as a product identification unit.

A caulking may be used as the deformed portion 15. For example, the shape or arrangement of the caulking in the punching member 10 _k may be different from the shape or arrangement of the caulking in the punching member 10 _m .

  As shown in FIG. 12, the present invention may be applied to the punching member 30 of the rotor laminated iron core. In the form shown in FIG. 12, a plurality of deformed portions 15 (two deformed portions 15 in FIG. 12) are formed on the inner peripheral edge of the punching member 30. One deformed portion 15 is one convex portion that protrudes toward the center side of the punching member 30. The other deformed portion 15 is two concave portions that are recessed toward the outer peripheral edge side of the punching member 30. These two different shaped portions 15 having different shapes can identify the boundary portion of the translocation. In other words, in the form of FIG. 12, the deformed portion 15 has both a function for identifying the punching position of the punching member 10 and a function as a transposition identifying unit for identifying the boundary of transposition.

DESCRIPTION OF SYMBOLS 1 ... Stator laminated iron core (stator), 6 ... Identification mark, 10, 10A-10H, 10 _{1-10 N} ... Punching member, 15, 15A-15F ... Deformed part, 100 ... Manufacturing apparatus, 130 ... Punching apparatus, 150 ... controller (control part), ac ... shape, W ... electromagnetic steel plate (metal plate; processed plate).

Claims (5)

In the first to Nth positions (N is a natural number of 2 or more) arranged in a line in the width direction of the belt-shaped metal plate, the metal plate is punched along a predetermined first to Nth punching shape, and the first A first step of forming first to Nth punching members respectively corresponding to the 1st to Nth punching shapes;
A second step of laminating a plurality of the punched members to form a laminate,
Each of the first to Nth punching members is formed with a plurality of deformed portions having a concave shape or a convex shape at positions overlapping each other at the time of lamination in the second step,
The shape of the punching member of the kth (k is a natural number of 1 to N) and the shape of the punching member of the mth (m is a natural number satisfying m ≠ k) are not matched with each other. The shape or arrangement of at least one of the plurality of deformed parts in the kth punching member is different from the shape or arrangement of at least one of the plurality of deformed parts in the mth punching member. A method for producing a laminated core.   The deformed portions are formed on the peripheral edges of the first to Nth punching members, respectively, a welded portion for welding the punching members to each other, and fitted with a mold when punching the punching member from the metal plate. The method according to claim 1, wherein the method is any one of a mating portion to be mated or a transposition identification unit for identifying a transposition.   The method according to claim 1, wherein the punching member has an annular shape.   The said 2nd process WHEREIN: The said punching member or the said laminated body is formed by rolling over the block body in which the predetermined number of the punching members were laminated | stacked, The said laminated body is formed. the method of.   The method according to any one of claims 1 to 4, wherein in the first step, an identification mark for identifying the front and back of the punching member is formed.

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