Manufacturing method of fine insulated square wire

Abstract

The invention relates to a manufacturing method of a micro insulation square wire. The manufacturing method of the fine insulated square wire comprises the following steps: drawing a semi-finished product of a metal material into a round wire with a specific size according to the requirement of a product specification; performing high-temperature annealing on the wire; insulating paint spraying is carried out on the wire rod in a high-pressure closed pulse numerical control spraying mode, so that the thickness of a single-side paint film is 0.5-3 microns; baking and cooling the wire for the first time; carrying out combined calendering on the wire rod, and shaping the wire rod into a square conductor; and coating an insulating paint film by adopting an electrophoresis method. The manufacturing method of the fine insulation square wire has the advantages of being uniform in sharp corner paint film, smooth in winding and high in full slot rate.

Description

technical field [0001] The invention relates to the field of enameled wire production, in particular to a method for making a fine insulated square wire. Background technique [0002] At present, the wire cross section of most coils is circular. When using round wire or semicircular flat wire to manufacture coils, large gaps will naturally occur. Therefore, the utilization rate of the current low volume of the coil is very low, and the conductor impedance is very high. With the rapid growth and demand of 5G mobile phones, 5G equipment, artificial intelligence machines, new energy and intelligent electrical appliances and automobiles in recent years, and the high added value of these high-end products, it brings a wider range of applications for enameled wires. fields and bright prospects. Followed by higher and more stringent requirements for enameled wire performance. In order to significantly reduce the DCR of the product, customers have been eager for manufacturers to c...

AI Technical Summary

Problems solved by technology

In order to significantly reduce the product DCR, customers have been eager for manufacturers to cooperate with the development of enameled wires with rectangular square wires to increase the conductor cross-section ratio, so as to solve the problems of high impedance and low volume utilization

However, in the existing technology, enameled wires with fine insulated square wires close to right angles have not been produced, which is far from meeting the needs of customers. Therefore, an innovative new manufacturing process and technology is urgently needed to manufacture high-performance rectangular enameled wires.

However, due to the sharp corners of square enameled wires, the paint film at the sharp corners is prone to be abnormally weak due to uneven paint film during the painting process, and it is easy to break down during use and easily cause unevenness during winding Standard status

In conventional means, arc treatment is usually performed on the sharp corner position, that is, increasing the R angle at this position, thereby reducing the surface stress of the paint film, but increasing the R angle will lead to an increase in the gap after winding, and a decrease in the full slot rate. Can not meet customer needs

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