Technology for manufacturing commutator with cold-pressed end face and its product

Abstract

A commutator with cold-pressed end face is made up of circular copper wire through cutting, cold pressing, cleaning, shaping, turning, milling slot and bending. Its advantages are simple technology, no spark and noise generation, and long service life.

Description

technical field [0001] The present invention relates to the invention of the manufacturing method of the commutator, and specifically relates to the invention that the whole commutator is manufactured into an end face commutator by cold extrusion method. Background technique [0002] In the prior art, the end face commutator is a step-row commutator group formed by four drawing processes. After punching according to the specified size, each step-row commutator group is separated by a piece of mica sheet by hand. A commutator is formed according to the number of designed pieces. Due to the tolerance generated during the drawing and forming process, plus the tolerance of the thickness of the mica piece, when milling the mica groove, it must be milled one piece at a time, and two pieces of mica grooves cannot be milled at one time. The milling process is complicated, and the two corresponding commutation pieces of the hand-made commutator are not symmetrical ...

AI Technical Summary

Problems solved by technology

[0003] In view of the problems existing in the known technology, the purpose of the present invention is to provide a simple and scientific process, save labor time and materials, the processed product has a long service life, and a method of manufacturing a cold extrusion commutator with a scientific structure and its Product, in order to achieve the above object, the present invention is accomplished in the following manner: the manufacturing method of this kind of cold extrusion end face commutator is characterized in that after the round copper wire is cut, it is cold extruded into a commutator blank, cleaned Afterwards, it is injection molded, and after turning, groove milling, and hook milling, the hook is finally formed; the injection molding process is to fill the cavity of the blank with bakelite powder for extrusion molding; the turning process It is to trim the inner and outer circles of the formed end face commutator; the cold extruded end face commutator product produced by the above method, when milling the groove, divide the end face into equal parts, and only need to use The milling cutter mills the slot at one time, which overcomes the problems of sparks and loud noises caused by the commutator processed by the traditional process because the corresponding commutator segments are not symmetrical on a straight line, and the service life of the commutator is improved. , while effectively maintaining the performance of the motor, it is a major breakthrough in the commutator production process

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