A production mold for a cutting-free stator core

Abstract

The utility model provides a kind of production mould of free-cutting stator core, including the upper die and lower die of pairing use, lower die is equipped with stamping hole site, stamping hole site includes stator outer type punch station;Stator outer type punch station includes several arc grooves, and arc groove is annular array arrangement;Upper die is connected with male module, and male module is driven to stretch out and retract by pneumatic actuator;When the silicon steel sheet at the both ends of stamping stator core is controlled male module to stretch out, corresponding arc portion is cut directly, and male module is retracted when the silicon steel sheet in middle part is punched, and the outside of silicon steel sheet is not cut, finally, after the whole stator core is stacked, it is formed naturally, without additional secondary cutting, avoid the time consumed by secondary processing, shorten stator core production cycle, improve product output in unit time.

Description

Technical Field

[0001] This utility model relates to the field of stator core production mold technology, and in particular to a stator core production mold that does not require cutting. Background Technology

[0002] The stator core is a component of an electric motor, formed by stacking multiple stamped silicon steel sheets. Currently, during the stamping process, the shape of each silicon steel sheet is completely identical, and the stator core formed by stacking the silicon steel sheets is as follows: Figure 1 As shown. However, when connecting the stator core to the motor end cover, a stop structure 30 needs to be machined into the stator core, such as... Figure 2 As shown, the stop structure 30 is used to form a concave-convex fit with the stop groove of the motor end cover to ensure the radial positioning accuracy of the bearing hole and the stator core after the end cover is assembled.

[0003] However, secondary cutting not only consumes a lot of time and labor costs and reduces production efficiency, but may also lead to unstable product quality due to errors in the cutting process. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a production mold for stator core that does not require cutting, which can process the stop edge in a cutting-free manner.

[0005] This utility model is implemented as follows: This utility model provides a cutting-free stator core production mold, including a paired upper mold and a lower mold. The lower mold is provided with at least one set of stamping holes. Along the stamping processing direction of the strip, the stamping holes are divided into a first stamping station, a second stamping station, a third stamping station, a rotor center hole punching station, a rotor packing hole, a rotor blanking station, a stator slot punching station, a stator packing station, a stator outer shape punching station, and a stator blanking station. The stator outer punching station includes several arc-shaped grooves on the surface of the lower die, and several of the arc-shaped grooves are arranged in a circular array on the lower die; The upper mold is connected to a convex module that matches the arc-shaped groove, and the convex module is driven to extend and retract by a pneumatic actuator; When stamping the first 10 and last 10 silicon steel sheets of the stator core, the convex module extends out. When the upper die presses down, the convex module cuts off the arc-shaped part corresponding to the convex module on the outside of the silicon steel sheet. When stamping the silicon steel sheet in the middle of the stator core, the convex module retracts, and the arc-shaped part corresponding to the convex module is not cut off on the outside of the silicon steel sheet in the middle of the stator core. Thus, when the silicon steel sheets are stacked to form the stator core, a stepped stop is formed at both ends of the stator core.

[0006] Furthermore, the lower die is provided with two sets of stamping holes to simultaneously process two rows of silicon steel sheets, and the two rows of stamping holes are staggered.

[0007] Furthermore, the first stamping station is provided with guide punching positions, rivet point avoidance punching positions, stator round punching positions and stator shape marking punching positions. The second stamping station is equipped with rotor lamination holes, stator round punches, and stator outline marking punches. The third stamping station is provided with rotor slot punching positions and stator lamination holes.

[0008] The advantages of this utility model are as follows: In the stamping die for the silicon steel sheets of the stator core, a convex module that can be driven to extend and retract by a pneumatic actuator is designed for the stamping station of the stator shape. When stamping the silicon steel sheets at both ends of the stator core, the convex module is controlled to extend and directly cut off the corresponding arc-shaped part. When stamping the silicon steel sheet in the middle, the convex module is retracted, and the outer side of the silicon steel sheet is not cut off. Finally, after the stator core is stacked as a whole, a stop is naturally formed, eliminating the need for additional secondary cutting, avoiding the time spent on secondary processing, shortening the stator core production cycle, and increasing the product output per unit time. Attached Figure Description

[0009] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0010] Figure 1 A schematic diagram of the structure of a stator core formed by stacking silicon steel sheets stamped by existing molds.

[0011] Figure 2 This is a schematic diagram of a stator core structure with a stop structure.

[0012] Figure 3 This is a schematic diagram of the structure of a production mold for a non-cutting stator core according to this utility model. Figure 1 .

[0013] Figure 4 This is a schematic diagram of the specific implementation of the stamped stator core in this utility model.

[0014] Figure 5 This is a schematic diagram of the structure of the silicon steel sheet being stamped out of the stop in this utility model.

[0015] Figure 6 This is a schematic diagram of the structure of a production mold for a non-cutting stator core according to this utility model. Figure 2 .

[0016] Explanation of the labels in the diagram: 1. Upper die; 101. Protruding module; 2. Lower die; 3. Rotor center hole punching position; 4. Rotor packing hole position; 5. Rotor blanking station; 6. Stator slot punching station; 7. Stator packing station; 8. Stator outer shape punching station; 81. Arc groove; 9. Stator blanking station; 10. Silicon steel sheet; 11. Arc part; 12. Stop; 13. Guide punching position; 14. Rivet point avoidance punching position; 15. Stator round punching position; 16. Stator outer shape mark punching position; 17. Rotor lamination hole position; 18. Rotor slot punching position; 19. Stator lamination hole position. Detailed Implementation

[0017] Please see Figures 1 to 6 This utility model provides a cutting-free stator core production mold, including a paired upper mold 1 and a lower mold 2. The lower mold 2 is provided with at least one set of stamping holes along the stamping processing direction of the strip. The stamping holes are divided into a first stamping station, a second stamping station, a third stamping station, a rotor center hole punching station 3, a rotor packing hole 4, a rotor blanking station 5, a stator slot punching station 6, a stator packing station 7, a stator outer shape punching station 8, and a stator blanking station 9. The rotor packing hole 4 and the stator packing station 7 are used to punch out the fastening points of the rivets.

[0018] The stator outer punching station 8 includes a plurality of arc-shaped grooves 81 provided on the surface of the lower die 2, and the plurality of arc-shaped grooves 81 are arranged in a circular array on the lower die 2; The upper mold 1 is connected to a convex module 101 that matches the arc groove 81. The convex module 101 is driven to extend and retract by a pneumatic actuator. The pneumatic actuator is fixedly connected to the upper mold 1.

[0019] When stamping the first 10 and last 10 silicon steel sheets 10 of the stator core, the convex module 101 extends out. When the upper die 1 presses down, the convex module 101 cuts off the arc-shaped portion 11 corresponding to the convex module 101 on the outside of the silicon steel sheet 10. When stamping the silicon steel sheet 10 in the middle of the stator core, the convex module 101 retracts, and the arc-shaped portion 11 corresponding to the convex module 101 is not cut off on the outside of the silicon steel sheet 10 in the middle of the stator core. Thus, when the silicon steel sheets are stacked to form the stator core, a stepped stop 12 is formed at both ends of the stator core.

[0020] Specifically, the lower die 2 is provided with two sets of stamping holes to simultaneously process two rows of silicon steel sheets 10, and the two rows of stamping holes are staggered.

[0021] Specifically, the first stamping station is provided with a guide punching position 13, a rivet point avoidance punching position 14, a stator round punching position 15 and a stator shape mark punching position 16. The second stamping station is provided with rotor lamination hole position 17, stator round punch and stator outline marking punch position 16; The third stamping station is provided with rotor slot punching position 18 and stator lamination hole position 19.

[0022] While specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and not intended to limit the scope of the present invention. Equivalent modifications and variations made by those skilled in the art in accordance with the spirit of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A cutting-free stator core production mold, characterized in that: It includes a paired upper die and a lower die, wherein the lower die is provided with at least one set of stamping holes. Along the stamping processing movement direction of the strip, the stamping holes are divided into a first stamping station, a second stamping station, a third stamping station, a rotor center hole punching station, a rotor packing hole, a rotor blanking station, a stator slot punching station, a stator packing station, a stator outer shape punching station, and a stator blanking station. The stator outer punching station includes several arc-shaped grooves on the surface of the lower die, and several of the arc-shaped grooves are arranged in a circular array on the lower die; The upper mold is connected to a convex module that matches the arc-shaped groove, and the convex module is driven to extend and retract by a pneumatic actuator; When stamping the first 10 and last 10 silicon steel sheets of the stator core, the convex module extends out. When the upper die presses down, the convex module cuts off the arc-shaped part corresponding to the convex module on the outside of the silicon steel sheet. When stamping the silicon steel sheet in the middle of the stator core, the convex module retracts, and the arc-shaped part corresponding to the convex module is not cut off on the outside of the silicon steel sheet in the middle of the stator core. Thus, when the silicon steel sheets are stacked to form the stator core, a stepped stop is formed at both ends of the stator core.

2. The production mold for a non-cutting stator core as described in claim 1, characterized in that: The lower die is provided with two sets of stamping holes to simultaneously process two rows of silicon steel sheets, and the two rows of stamping holes are staggered.

3. The production mold for a non-cutting stator core as described in claim 1, characterized in that: The first stamping station is provided with guide punching positions, rivet point avoidance punching positions, stator round punching positions and stator shape marking punching positions; The second stamping station is equipped with rotor lamination holes, stator round punches, and stator outline marking punches. The third stamping station is equipped with rotor slot punching positions and stator lamination holes.

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