Method for manufacturing commutator

Abstract

The invention discloses a method for manufacturing a commutator, which is characterized by following procedures including: (1) blanking and drawing; (2) punching a commutator segment provided with a hook; (3) washing the commutator segment; (4) lining up the commutator segment which is then pressed and arranged on a locating housing wrapping the inner side of the hook of the commutator segment; (5) sheathing the locating housing on an injection molding die to complete the injection molding of the commutator; (6) removing a feed handle, stripping down the locating housing and forming an insulation groove; (7) curing; (8) machine hinging an inner hole of the commutator; (9) forming a hook of the commutator; and (10) polishing. Compared with the prior art, the insulation groove of the commutator of the invention is completed through forming in one piece of the locating housing; in the process of forming the insulation groove, no mica sheet is used, and mechanical processing such as engraving mica, etc. is not needed; the locating housing can solve the problem of over-tight matching between the molding die and the hook of the commutator segment, and improve yield of the product; simultaneously, wrapping of the commutator segment by the locating housing avoids pasting of plastic on the hook when injection molding is carried out; and a demand for clean surface of the hook can be met without turning.

Description

technical field [0001] The invention relates to a method for manufacturing a commutator, in particular to a method for manufacturing a hook type commutator. Background technique [0002] At present, there are many structures of commutators used in motor armatures, such as slot commutators, hook commutators, K-type commutators, etc. Most products include a commutator base and molded on the commutator. Multiple commutator segments on a base body. For the hook commutator, one end of the commutator segment is provided with a hook foot, and the commutator base is provided with a plurality of insulating grooves equipped with mica sheets. The insulating grooves are formed by machining, generally Turning the outer circle first, and then milling with a milling blade can be completed in multiple processes, and the mica sheet also needs to go through multiple processes such as blanking, punching, sheet arranging, and pressing. The hook commutator in the prior art The manufacturing pr...

AI Technical Summary

Problems solved by technology

[0004] In the above-mentioned manufacturing method, after the commutator is turned, the insulating groove provided with the mica sheet needs to be milled according to the regulations, the subsequent processing technology involved is relatively complicated, and the production cycle is long; in addition, there is such a problem in the processing of the insulating groove: due to There is a certain tolerance in the processing and forming of the mica sheet, which causes inconsistent tightness of the sheet ring when the sheet is arranged, so that it is easy to cause a slanted sheet phenomenon when the commutator is formed, and the existence of the slanted sheet phenomenon will lead to residues in the insulating groove after processing. Mica can cause problems such as loud noise and rapid wear of carbon brushes, which will affect the performance of the motor

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