Welding method of electric contact

Abstract

The invention discloses a welding method of an electric contact and belongs to the technical field of electronic production. The method comprises the following steps that (1) welding materials are prepared first, wherein a circular electric contact with the specification of 7 mm * 5 mm is selected, the materials are AgW50, red copper is T2, the specification is a circle of 10 mm * 5 mm, and brazing materials are Ag-Cu-Zn alloy; (2) brazing equipment is prepared; and (3) resistance brazing equipment is used, the contact, the red copper and brazing filler metal are placed in order, brazing flux is arranged on the surface of the brazing filler metal in a coating mode, welding current is adjusted to be 65 A-75 A, manual pressurizing is used, electrifying and heating are carried out, when the red copper becomes red, welding flux is molten and is evenly effused to the periphery, electrifying is stopped, cooling is carried out until the welding flux is solidified, and a welding piece is taken out. A resistance brazing method is used for carrying out welding on the AgW50 contact materials and the red copper, the heating temperature and the heating time of resistance brazing can be controlled easily, an obtained brazing connector is high in quality, the problems that a flame brazing AgW50-Cu contact is low in efficiency and unstable in quality are well solved, and the electric contact is easy to operate and convenient to promote and use.

Description

technical field [0001] The invention belongs to the field of electronic production technology, and in particular relates to a welding method for electric contacts. Background technique [0002] With the rapid development of the economy, the electronics industry has also developed at an unprecedented speed. Ag-W electrical contacts are one of the most critical contact elements in high-voltage switches. Most of them are made by powder metallurgy. They have high conductivity, wear resistance and arc resistance, but their weldability is poor. In the field of electronic preparation industry, manual flame welding is widely used in the switch industry, but the efficiency is low, the working environment for operators is poor, and the product quality is not stable enough. Contents of the invention [0003] The present invention aims to solve the above problems, and provides an improved electric contact welding method. [0004] The welding method of a kind of electric contact of t...

AI Technical Summary

Problems solved by technology

Ag-W electrical contacts are one of the most critical contact elements in high-voltage switches. Most of them are made by powder metallurgy. They have high conductivity, wear resistance and arc resistance, but their weldability is poor. In the field of electronic preparation industry, manual flame welding is widely used in the switch industry, but the efficiency is low, the working environment for operators is poor, and the product quality is not stable enough