Method for improving welding performance of direct-current relay

Abstract

The invention discloses a method for improving the welding performance of a direct-current relay, and relates to a lower yoke plate, a metal shell and a frame sheet, the method comprises the frame sheet welding step: firstly, the thickness of one surface, opposite to the frame sheet, of the lower yoke plate is thinned, a first sinking groove is machined, and the shape of the first sinking groove is matched with the connecting position of the frame sheet; then aligning the frame sheet to be connected with the first sinking groove and then embedding the frame sheet into the first sinking groove in a matching manner; and finally welding the frame sheet and the first sinking groove together through electric resistance welding. And a metal shell welding step: firstly, the thickness of one surface, opposite to the metal shell, of the lower yoke plate is thinned, a second sinking groove is processed, the shape of the second sinking groove is matched with that of the joint of the metal shell, then the metal shell to be connected is aligned with the second sinking groove and then is embedded into the second sinking groove in a matched manner, and finally, the metal shell and the second sinking groove are welded together through electric resistance welding. The sinking groove is designed to reduce the thickness of the lower yoke plate so as to reduce the current of the welding machine, materials can be saved, and the production efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of relays, in particular to a method for improving the welding performance of a DC relay. Background technique [0002] High-voltage DC relays are generally composed of ceramic cover components, frame pieces, lower yoke plates, metal shells, and exhaust pipes. In the existing schemes, one side of the lower yoke plate is laser-welded with frame pieces, and the ceramic cover components are covered. On the frame piece, the metal shell is laser welded on the other side of the lower yoke plate, so that a sealed cavity is formed between the ceramic cover assembly, the lower yoke plate, and the metal shell. However, this process method is gradually eliminated, and the more cost-effective resistance welding method is adopted. [0003] Resistance welding refers to the method of using the resistance heat generated by the current passing through the weldment and the contact as the heat source to locally heat the weldm...

AI Technical Summary

Problems solved by technology

If the thickness of the lower yoke plate is too large, a higher current is required, which requires a higher power resistance welding machine. Excessively high current consumes more power, and the heat transfer efficiency is low, and the welding time is long, resulting in a slow production cycle.

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