Method for machining combined coil of iron core

Abstract

The invention provides a method for machining a combined coil of an iron core, which solves the problems that when the iron core is pressed into a hollow coil, a coating on the surface of the iron core is partially released, and the iron core and the hollow coil relatively rotate due to non-tight fit; and the flatness of a copper ring and the iron core are difficult to guarantee. The method provided by the invention has the main points that the iron core and a special punching and riveting tire for the copper ring are mutually and integrally connected by using a punching and riveting expansion technology so as to form an iron core assembly; a magnet is placed in a cavity of the iron core assembly of a hollow coil molding mould, and the iron core assembly is arranged in the cavity, so that the iron core assembly and the mould are positioned; and the hollow coil is injected. The method provided by the invention has the beneficial effects that not only can the coating on the outer surface of the iron core be prevented from releasing, but also the iron core assembly and the hollow coil are tightly matched; and the flatness of the copper ring and the iron core can be ensured.

Description

technical field [0001] The invention relates to a processing method of an iron core combined coil, in particular to a processing method of an iron core combined coil of an AC conversion relay. Background technique [0002] At present, the steps of processing the iron core combined coil of the AC conversion relay are: [0003] 1. Injection molded coreless coils; [0004] 2. Press the iron core into the hollow coil; [0005] 3. Rivet the copper ring into the iron core. [0006] The problem in the above step 2 is: when the iron core is pressed into the hollow coil, the coating on the outer surface of the iron core is subjected to external force, causing the coating on the surface of the iron core to partially fall off. Secondly, the iron core and the hollow coil are not closely matched, easy to fall off, and relatively rotated. The problem in the above step 3 is that it is difficult to guarantee the flatness of the copper ring and the iron core. Contents of the invention ...

AI Technical Summary

Problems solved by technology

[0006] The problem in the above step 2 is: when the iron core is pressed into the hollow coil, the coating on the outer surface of the iron core is subjected to external force, causing the coating on the surface of the iron core to partially fall off

Secondly, the iron core and the hollow coil are not tightly matched, easy to fall off, and relatively rotated

The problem in the above step 3 is that it is difficult to guarantee the flatness of the copper ring and the iron core

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