Assembled platy commutator processing method

Abstract

The invention relates to a motor commutator processing method. The commutator processing method sequentially includes the steps: processing a commutator bar provided with an insertion portion; adopting a support with an inner round hole, and forming a component for arranging the commutator bar on the side wall of the inner round hole; arranging the commutator bar on the support to enable the component and the commutator bar to be fixedly matched so that a composite part is obtained; placing the composite part into a corresponding mould so that the composite part forms an insulating base body by injection molding; performing heat treatment for a formed blank; and finishing so that a finished product is obtained. The commutator processing method has the advantages of lower commutator processing cost, fewer commutator processing procedures and the like.

Description

technical field [0001] The invention relates to a processing method of a motor commutator, in particular to a processing method of an assembled chip type commutator. Background technique [0002] The commutator is an important part of the motor. It is mainly composed of an insulating body and commutator segments arranged around the insulating body. At present, the processing method of a commutator with mica participating in the sheet arrangement goes through the following steps in sequence (see Figure 9 ): copper bar blanking (see the three-dimensional view of the copper bar Picture 1-1 ), copper to remove oil, mica blanking (see mica three-dimensional view Figure 1-2 ), arrange the copper bars and mica (see figure 2 , image 3 , Figure 4 ), plastic molding, heat treatment, turning inner hole, turning outer diameter, milling hook, milling groove, curved hook, brush hook, and finally form a finished commutator. In this process, the commutator segments should be arra...

AI Technical Summary

Problems solved by technology

In this process, the commutator segments should be arranged in a cylindrical shape, and mica sheets are inserted between each commutator segment for preliminary insulation. Due to the high price of mica, the cost of commutator manufacturing is increased; at the same time , due to the use of mica, after the plastic is formed, the mica between the copper bars must be milled off by milling, which increases the process and reduces work efficiency. If the mica is not milled off, the mica between the commutator segments Insulation, this kind of commutator has a greater impact on the wear of carbon brushes, and the life of the motor will be shortened

In addition, in this process, a large pre-tightening force is required when the assembled parts are pressed into the mold cavity. After molding, the internal stress of the product is relatively large. When the plastic is heat-treated, the plastic has cracking defects

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