Method for making electric machine stator iron and rotor core

Abstract

The invention provides a manufacture method of a stator iron core and a rotor iron core of a motor. A rotor iron core piece is first punched by a metal thin plate and then laminating is carried out for the punched rotor iron core piece by a rotation method or a non-rotation method; after that, the common frontal part of a stator iron core piece is coarsely punched on the metal thin plate by which the rotor iron core piece is punched; the punched common frontal part is then stretched and levelled; the length of the levelled common frontal part is increased in the direction of the center compared with the common frontal part before being stretched; after that, the common frontal part and the tooth profile thereof are precisely punched to ensure the size precision of the stator iron core piece; finally the outline of the stator iron core piece is punched and the stator iron core piece is laminated. By adopting the method, the invention ensures enough punching allowance during the precise punching of the tooth profile, and the magnetic flux is not disordered as no unsmooth sectional difference exists on the surface and side surface of the common frontal part.

Description

【Technical field】 [0001] The invention relates to a method for manufacturing a motor stator and a rotor, in particular to a method for manufacturing the motor stator and rotor by sharing a material. 【Background technique】 [0002] The motors are equipped with stators and rotors, which are respectively composed of multiple stator core pieces and stator core pieces that are stamped with metal sheets and then riveted in a rotating or non-rotating manner, and in order to meet the high performance and high precision of the motor The development trend requires that the gap between the stator and the rotor should be as small as possible (less than 0.02mm) to obtain higher efficiency and torque. [0003] At present, there are two methods for manufacturing the stator core pieces and rotor core pieces in the industry: [0004] The first method is that the stator core piece and the rotor core piece are punched out of two different metal sheets. Although this method can produce product...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a manufacturing method for the stator and rotor of an electric motor, so as to solve the defects in the above two methods that the waste of materials is large, and the magnetic flux of the stator core is disturbed due to the unevenness of the surface and the side of the common forehead.

[0007] Another object of the present invention is to provide a manufacturing method of the stator core sheet of a motor, so as to solve the defects of the large waste of materials in the above two methods, and the disorder of the magnetic flux of the stator core due to the unevenness between the surface and the side of the common forehead.

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