Manufacturing method for slot forming type commutator and products thereof

Abstract

The invention discloses a manufacturing method for a slot forming type commutator. The manufacturing method sequentially comprises the following processes of: warm extruding, drawing, punching, segment ranking, compressing, curing, inner hole turning, excircle turning, sanding and polishing, wherein the segment ranking process means ranking commutator segments firstly, and then inserting and ranking inner mica sheets with the same width as that of an insulation slot and outer mica sheets with the width narrower than that of the insulation slot in sequence; and the compressing process means removing the outer mica sheets so as to naturally generate the insulation slot between the commutator segments and make residues not exist in the insulation slot between the commutator segments. In the manufactured slot forming type commutator, the width of an insulation layer between the commutator segments is the same as that of the insulation slot. By the manufacturing method, the conventional slot milling process is omitted, the materials of the commutator segments cannot be wasted, and the insulation performance among the commutator segments is effectively improved so as to improve the yield of commutator products, lower production cost and improve technical performance and quality of the products.

Description

1. Technical Field [0001] The invention relates to a method for manufacturing a commutator for a motor and its products. 2. Background technology [0002] At present, the manufacturing method of commutators for motors generally adopts the platoon type, that is: first roll, anneal, and draw the wire, then punch the drawn wire into a single piece of commutator, and then lay the piece and press , Curing, car inner hole, car outer circle, milling, sanding, polishing and other processes to make the finished commutator. Among them: the arranging process uses a cylindrical core arranging device as the skeleton, inserting the commutator pieces into the grooves of the arranging device one by one in the same direction, and then mica pieces (the raw material is mica accounting for about 92%, and the glue content is about 8%) is inserted between the commutating pieces, and then tightened with fasteners (which can be referred to as embedded commutator pieces and inserted mica pieces). The m...

AI Technical Summary

Problems solved by technology

The slot milling process is to process the insulating slots between the commutator segments with a milling cutter, and there will inevitably be burrs in the insulating slots; at the same time, in order to ensure that both sides of the commutator segments can be processed in place when milling slots, the design of the commutator segments The body part of the commutator is slightly wider than the body part after the milling groove, resulting in waste of material for the commutator segment; the insulation layer between the commutator segments is slightly narrower than the insulation slot between the segments, resulting in poor insulation performance between the commutator segments, which affects the Technical performance and quality of commutator products

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