Method for manufacturing hook type commutator

Abstract

The invention provides a method for manufacturing hook-type commutators. The method is characterized by comprising the following steps that: (1) copper materials are used as a raw material, blanked and drawn into a copper bar; (2) a commutator segment hook leg, a dovetail groove and a lower notch groove of a hook-type commutator are hierarchically and synchronously punched on the copper bar, and the copper bar is cut off; (3) a punched-molded commutator segment is cleaned; (4) mica sheets are shorn and punched and arranged; (5) the commutator segment and the mica sheets are pressed into an injection mold and injection-molded into a commutator, and a commutator matrix is formed; (6) solidification is carried out; (7) an inner hole of the commutator is reamed, and the commutator segment hook leg is pneumatically bent; and (8) polishing is carried out. The method adopts a multistage punching process for the commutator segment, omits a plurality of machining processes after the commutator is injection-molded and press-molded, shortens production circle, and prevents machining from bringing bad effect to the whole commutator product.

Description

technical field [0001] The invention relates to a commutation device of a motor armature, in particular to a manufacturing method of a hook commutator. Background technique [0002] At present, the basic structure of the hook commutator is mainly composed of multiple commutator segments and a plastic matrix for fixing the commutator segments. Multiple insulating slots are arranged in the commutator base. Equipped with mica sheet, the insulation groove is machined and formed, generally it can be completed by multiple processes such as milling, adding and turning the outer circle with milling blade; and the mica sheet also needs blanking, punching, sheet arrangement and There are multiple processes such as pressing and placing. [0003] The general manufacturing process of the existing hook-type commutator is: cutting and pulling the commutator piece—punching the commutator piece and cutting the mica piece into strips—cleaning the commutator piece and punching the mica piece—...

AI Technical Summary

Problems solved by technology

Among them, in the processing process of the above-mentioned commutator, before the step of injection molding and pressing, it is the rough machining part of the commutator piece. After injection molding, it is reprocessed through multiple processes such as turning, milling, boring, and throwing to achieve the commutator piece process. The size requirement belongs to the finishing part. In this process, the commutator piece itself needs many follow-up machining steps, and the manufacturing process of the entire commutator is complicated. Therefore, the production cycle is long and the material waste is large. make further improvements

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