Commutator production process

Abstract

A method for preparing a commutator is characterized in that: (1) blanking and drawing; (2) punching commutator bars; (3) washing the commutator bars; (4) punching mica plates for molding and the plates possess notches; (5) aligning the commutator bars and the mica plates; (6) compressing the commutator bars and the mica plates into a basal body for molding; (7) solidifying; (8) boring; (9) turning excircle; (10) disconnecting the notches, removing spare mica plates and then shaping an insulator groove; (11) milling a cable notch; wherein, the distance between the notches in the step (4) and the excircle after turning in step (9) is the depth of the radial insulator groove of the commutator. Compared with the prior art, the size of the insulator groove is guaranteed by the mica plates. When the mica plates are punched, the notch is pressed, thus the spare mica plates can be removed without milling after turning excircle, process procedures of milling the insulator groove are saved and the manufacturing process is more easy and simple.

Description

technical field [0001] The invention relates to a method for manufacturing a commutator. Background technique [0002] The slot commutator usually consists of multiple commutator segments and a plastic matrix for fixing the commutator segments. Multiple insulating slots are arranged in the commutator base, and mica sheets or electrician Insulating plastic is used to separate adjacent commutator segments. In addition to preventing short circuits between adjacent commutator segments, the setting of insulating slots is mainly to reduce the wear of carbon brushes. If there is no insulating slot, the commutator will work At the same time, the carbon brush will alternately rub against the two different materials of the commutator and mica (electrical insulating plastic), which will accelerate the wear of the brush and reduce the service life of the carbon brush. [0003] The molding process of the slot-type commutator in the prior art is generally as follows: 1. Carry out the bla...

AI Technical Summary

Problems solved by technology

[0004] In the above-mentioned manufacturing process, after the commutator is formed, it is necessary to process the insulating groove on the milling machine, milling the redundant mica sheet, the subsequent machining process is more complicated, and there is still such a problem when processing the insulating groove: because the mica sheet There is a certain tolerance during processing and forming. When arranging the film, the tightness of the film ring is inconsistent, so it is easy to cause the phenomenon of inclined film during forming, which will cause mica to remain in the insulating groove after processing, resulting in loud noise and carbon brush. Phenomena such as excessive wear and tear will affect the running performance of the motor

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