Rotor punching piece manufacturing process

Abstract

The invention discloses a rotor punching piece manufacturing process and relates to a punching process. The process roughly comprises: firstly, punching a shaft hole on a plate-shaped silicon steel sheet; then, punching a coil groove with the shaft hole as a reference; punching a stator punching piece outer circumference with the shaft hole as a reference; cutting off a rotor punch piece from thestator punch piece with the shaft hole as a reference; and subjecting the stator and rotor punching pieces to correction, insulation varnish painting, and insulation detection, and assembling the rotor punching piece if qualified. The method has the following advantages and effects that the processing method of punching the shaft hole first and then punching with the shaft hole as a reference canreduce the offset of the punching piece during the processing, improves the machining accuracy of the stator and rotor punching pieces, reduces the eccentric inertia of the rotor at the start of the motor, thereby achieving a purpose of reducing the vibration strength during the start process of the motor.

Description

technical field [0001] The invention relates to a blanking process, in particular to a rotor punching manufacturing process. Background technique [0002] Motor stator punching and rotor punching are important parts in the motor. They are used to cooperate with copper core coils to convert electrical energy into mechanical energy, thereby achieving the effect of output torque. Therefore, the precision of stator punching and rotor punching in manufacturing And the quality will directly affect the performance of the motor after assembly. [0003] At present, the Chinese invention patent with the application publication number of CN101860134A discloses a stamping process for the stator and rotor of a wind power generator. It first punches the rotor light sheet on the sheet material, and at the same time punches the outer circle profile of the stator on the rotor light sheet, The process drives the keyway and the punching process hole; then, based on the punching process hole, ...

AI Technical Summary

Problems solved by technology

[0004] In the punching stamping process described above, the stator punching rough blank is first cut and punched, and then the driving keyway and the punching process hole are cut and punched on the rough blank, and then the rotor punch is cut from the center of the stator punch. Finally, the rotor middle slot (called the shaft hole in the present invention) that is used to pass through the rotating shaft of the rotor on the rotor punching sheet is processed again. Small, so it is easy to produce an offset during the blanking process, so that there is a deviation in the distance between each part of the outer circular contour of the rotor punching sheet and the middle slot of the rotor, and the motor rotor is in the process of rotation, so it is passed through the rotor The rotating shaft in the punching center is the center of rotation, so the distance from the outer circle of the rotor punching to the center of the shaft hole will directly affect the eccentric force of the rotor when it rotates. Poor machining accuracy will lead to excessive vibration during motor startup.

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