A stamping die for a stator core with a collar

Abstract

The utility model provides a kind of stamping die of stator core with stop, including the upper die and lower die of pairing use, stamping hole position includes stator outer type punch station and stator blanking station;Stator outer type punch station includes several arc grooves, and several arc grooves annular array are arranged on lower die;Upper die is connected with male module, and male module is driven to stretch out and retract by pneumatic actuator;When the first 10 pieces and the last 10 pieces of stator core silicon steel sheet are punched, male module stretches out, to cut off the arc-shaped part corresponding to male module on the outside of stator core silicon steel sheet, to punch out rectangular stop, when the silicon steel sheet in the middle of stator core is punched, male module retracts.The die of the utility model can form stop only at both ends of stator core, stop male wear slows down, die life is extended, reduces the downtime of die replacement and debugging, improves the continuous operation efficiency of stamping production line.

Description

Technical Field

[0001] This utility model relates to the field of stator core production mold technology, and in particular to a stamping mold for a stator core with a stop. Background Technology

[0002] The stator core is a component of the motor, formed by stacking multiple stamped silicon steel sheets. A stop structure is typically incorporated into the stator core, which forms a convex-concave fit with the stop groove on the motor end cover, ensuring the radial positioning accuracy of the bearing holes and the stator core after the end cover is assembled.

[0003] Currently, during the stamping process of stator cores, the stamping die stamps a stop on each silicon steel lamination (i.e., the shape of each silicon steel lamination is completely consistent). However, when the stator core is connected to the motor end cover, only the stops at both ends form a mating relationship with the stop grooves of the motor end cover. The stop in the middle part of the stator core does not participate in the mating connection with the end cover at all. Due to the stamping requirement of the stops, each lamination has a stop, and each silicon steel lamination needs to have a stop stamped. Compared with the stator slot punch, the stop punch has sharp corners or small radius arcs. The sharp corners or small radius arcs of the stop punch are prone to wear due to the high hardness of the silicon steel lamination. In contrast, the stator slots are mostly trapezoidal, rectangular, or pear-shaped, and the outline of the stator slot punch is a large radius transition or a straight section without sharp edges. Therefore, the wear rate of the stop punch is faster than that of the stator slot punch. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a stamping die for a stator core with a stop, which can reduce the wear of the stop punch.

[0005] This utility model is implemented as follows: This invention provides a stamping die for a stator core with a stop, the stamping die comprising a paired upper die and a lower die. The lower die 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 to cut off the arc-shaped part corresponding to the convex module on the outside of the silicon steel sheet of the stator core to stamp out a rectangular stop. When stamping the silicon steel sheet in the middle of the stator core, the convex module retracts.

[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. Furthermore, after the strip is stamped by the convex module, the distance between the arc-shaped portions cut off from the two rows of adjacent silicon steel sheets is 1mm.

[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 equipped with rotor slot punching positions and stator lamination holes.

[0008] The advantages of this invention are as follows: the mold of this invention can form stop marks only at both ends of the stator core, ensuring the overall assembly quality of the motor. At the same time, it avoids the problem of redundant machining and waste caused by machining stop marks in the middle of the stator core in the prior art. In addition, the wear of the stop mark punch is reduced, the mold life is extended, the downtime for mold replacement and debugging is reduced, and the continuous operation efficiency of the stamping production line is improved. Attached Figure Description

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

[0010] Figure 1 This is a schematic diagram of the structure of a stamping die for a stator core with a stop in this utility model. Figure 1 .

[0011] Figure 2 This is a schematic diagram of the structure of the silicon steel sheet being stamped with a rectangular stop in this utility model.

[0012] Figure 3 This is a schematic diagram of a specific embodiment of the present invention.

[0013] Figure 4 for Figure 3 A magnified view of part A of the structure shown.

[0014] Figure 5 This is a schematic diagram of the structure of a stamping die for a stator core with a stop in this utility model. Figure 2 .

[0015] Explanation of the labels in the diagram: 1. Upper die; 101. Protruding module; 2. Lower die; 3. Rotor center hole punching position; 4. Rotor packaging hole position; 5. Rotor blanking station; 6. Stator slot punching station; 7. Stator packaging station; 8. Stator outer shape punching station; 81. Arc groove; 9. Stator blanking station; 10. Silicon steel sheet; 11. Arc part; 12. Rectangular 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

[0016] Please see Figures 1 to 5 This utility model provides a stamping die for a stator core with a stop, the stamping die including an upper die 1 and a lower die 2 used in pairs; The lower die 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 position 3, a rotor packing hole 4, a rotor blanking station 5, a stator slot punching position 6, a stator packing station 7, a stator outer shape punching position 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. The rotor center hole punching position 3 is divided into two groups. The first group of rotor center hole punching positions 3 includes two concentric circular holes with diameters of 8mm and 10mm, respectively. 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, and the convex module 101 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 101 extends out to cut off the arc-shaped portion 11 corresponding to the convex module 101 on the outside of the silicon steel sheet 10 of the stator core, so as to stamp out a rectangular stop 12. When stamping the silicon steel sheet 10 in the middle of the stator core, the convex module 101 retracts.

[0017] 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. Furthermore, after the strip is stamped by the convex module 101, the distance between the arc-shaped portions 11 cut off from the two rows of adjacent silicon steel sheets 10 is 1mm. That is, after the stamped silicon steel sheets 10 are unloaded, two rows of staggered holes will be formed on the strip, such as... Figure 4 As shown, the minimum spacing L of the holes located in two rows and adjacent to each other is 1mm, so that there is still a narrow metal strip in the middle of the strip, which can hold the two sides of the strip.

[0018] 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 upper die 1 is equipped with corresponding punches; The second stamping station is provided with rotor lamination hole position 17, stator round punching position 15 and stator outline marking punching position 16; The upper die 1 is provided with punches corresponding to the rotor lamination hole 17, the stator round punch hole 15, and the stator outline mark punch hole 16.

[0019] The third stamping station is provided with rotor slot punching position 18 and stator lamination hole position 19.

[0020] The lower die also has a first reserved hole 31 for rotor blanking and a second reserved hole 32 for stator slot punching.

[0021] The upper die 1 is provided with punches corresponding to the rotor slot punching position 18 and the stator lamination hole position 19.

[0022] The advantages of this invention are as follows: the mold of this invention can form stop marks only at both ends of the stator core, ensuring the overall assembly quality of the motor. At the same time, it avoids the problem of redundant machining and waste caused by machining stop marks in the middle of the stator core in the prior art. In addition, the wear of the stop mark punch is reduced, the mold life is extended, the downtime for mold replacement and debugging is reduced, and the continuous operation efficiency of the stamping production line is improved.

[0023] 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 press die for a stator core with a collar, characterized by: The stamping die includes an upper die and a lower die used in pairs. The lower die 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 to cut off the arc-shaped part corresponding to the convex module on the outside of the silicon steel sheet of the stator core to stamp out a rectangular stop. When stamping the silicon steel sheet in the middle of the stator core, the convex module retracts.

2. A stamping die for a stator core with a retainer as defined 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. Furthermore, after the strip is stamped by the convex module, the distance between the arc-shaped portions cut off from the two rows of adjacent silicon steel sheets is 1mm.

3. A stamping die for a stator core with a retainer as defined in claim 1, characterized in that: The first stamping station is equipped 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.

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