A kind of manufacturing process of enameled bare copper flat wire

Abstract

The invention discloses a process for manufacturing an enameled bare copper flat wire. The process comprises the following steps of: directly extruding a bare copper flat wire by using a round copper rod; drawing by one or two moulds to obtain the bare copper flat wire with satisfactory appearance, size, hardness and density performances; and finally, enameling the satisfactory bare copper flat wire to obtain the finished enameled bare copper flat wire. According to the invention, the inherent defect of the traditional drawing process is overcome effectively, the appearance and size can be guaranteed and the surface quality can be improved obviously; and the product has moderate hardness, excellent electrical performance and good quality.

Description

technical field [0001] The invention relates to electric equipment, in particular to a manufacturing process of enamelled bare copper flat wire. Background technique [0002] The production process of enamelled bare copper flat wire is mainly the wire drawing process, that is, the round copper rod is first flattened, and then drawn by at least three dies such as the head die, the second die, and the third die. Special wire gauges require five dies to be drawn. , The bare copper flat wire gradually changes from large to small to reach the specified dimensions. Enamelled bare copper flat wire has high hardness, compact material and good toughness. [0003] The existing wire drawing process has the following inherent defects: [0004] ①Using the mold to control the size, the continuous friction between the copper wire and the mold causes the size of the mold to change and deform, and the shape of the bare copper flat wire changes greatly, resulting in different thicknesses of...

AI Technical Summary

Problems solved by technology

[0004] ①Using the mold to control the size, the continuous friction between the copper wire and the mold causes the size of the mold to change and deform, and the shape of the bare copper flat wire changes greatly, resulting in different thicknesses of the paint film when the mold is painted, and even with paint bumps and particles. There are hidden dangers in the insulation performance

[0005] ②The shape and size of the bare copper flat wire is fixed by the friction of the mould. Any defects such as roughness of the mould, gaps, or even a little copper scrap will cause serious problems such as tendons, dents, warping, etc. on the surface of the bare copper flat wire, which will seriously affect the safety of the transformer. pose a threat

[0006] ③The bare copper flat wire is drawn by friction with multiple molds, the yield strength will become very large, the wire is not easy to bend, and it is difficult to control the painting process, and even the wire and the paint mold are obliquely rubbed. If one side is too thin, if it is too thick, it will not be able to dry effectively to form insulation; if it is too thin, it will be charred and the insulation will be lost

During the flattening process, problems such as cracks and jagged protrusions often appear on the edge of the bare copper flat wire. During the mold drawing, problems such as cavities, edge coatings, and internal impurities are formed on the bare copper flat wire, which seriously affect the quality of the bare copper flat wire. electrical properties

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