Process for manufacturing bank-type commutator segment group with dovetail

Abstract

The invention discloses a process for manufacturing a band-type commutator segment group provided with a dovetail and used for a commutator, and the process comprises the following steps of: firstly implementing temperature extrusion processing on a copper wire to form the band-type commutator segment group, later implementing drawing processing on the band-type commutator segment group, and thenconducting rolling gear rolling-type cold extrusion processing on the band-type commutator segment group after drawing to obtain the band-type commutator segment group with the dovetail. The manufacturing process has the advantages that: the utilization rate of raw materials is high and the materials are saved by 25 percent or so without waste materials; the dovetail on the band-type commutator segment group does not suffer deformation or intensity damage, thereby guaranteeing the mechanical strength of the commutator segment group; the groove depth and width of an inner hook in the commutator segment group are uniform, thereby leading the external roundness of the commutator products to be good; and the manufacturing process is not restricted by the mold size and is applied to the commutator products with all specifications due to the rolling gear rolling-type cold extrusion.

Description

1. Technical field [0001] The invention relates to a commutator for a motor, in particular to a manufacturing process for a belt-type commutator plate group with a dovetail for the commutator. 2. Background technology [0002] At present, the known manufacturing process of the belt-type commutator segment group with dovetails for the commutator is: through the warm extrusion treatment of the copper wire, and through two drawing treatments (that is, the belt-type commutator segment The dimensional accuracy of the group meets the required requirements), and then the belt commutator group with dovetail is produced by punching through a punching machine and a special mold. In the process of punching the dovetail of the belt-type commutator group with a mold, the punched dovetail is easy to fall off and deform due to resistance, and the quality of the punching process is unstable, which will directly affect the subsequent process of the commutator group and the molding compound. ...

AI Technical Summary

Problems solved by technology

In the process of punching the dovetail of the belt-type commutator group with a mold, the punched dovetail is easy to fall off and deform due to resistance, and the quality of the punching process is unstable, which will directly affect the subsequent process of the commutator group and the molding compound. At the same time, the depth of the inner hook groove of the commutator piece group is uneven and the width of the inner hook is uneven, resulting in insufficient outer roundness of the commutator product; and the punched copper end The material directly becomes waste, resulting in a large consumption of raw materials and high production costs

In the case of limited size of stamping production equipment and special processing molds, the commutator segment group of this structure is not suitable for large-sized commutator products, only suitable for commutator products with an outer diameter of less than 30mm

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