A welding method for industrial plug socket contact assembly

Abstract

The invention belongs to the technical field of welding of contact assemblies, and in particular relates to a welding method of an industrial plug socket contact assembly including the following steps: (1) preparing solder, the solder is in the shape of an annular sheet, and its inner diameter is larger than that of a rivet contact nail foot diameter, and the outer diameter is smaller than the diameter of the rivet contact nail head; (2) Prepare welding electrodes, the material of the welding electrodes is three high graphite, the welding electrodes have two, and the ends of the two welding electrodes are set There are two grooves that match the outer circumference of the nickel-plated terminal; (3) Assembly: soak the nickel-plated terminal with flux, put the solder on the contact pin of the silver alloy copper-clad rivet, and then apply the silver alloy copper-clad The rivet contact pins are inserted into the positioning holes of the nickel-plated terminals soaked in flux to complete the assembly of the contact assembly; (4) Place the assembled contact assembly into the two matching welding electrodes so that the welding electrodes The end is 1-4mm away from the head of the rivet contact, and then resistance brazing is performed to finally complete the welding of the contact assembly.

Description

technical field [0001] The invention belongs to the technical field of welding of contact assemblies, and in particular relates to a welding method of contact assemblies of industrial plugs and sockets. Background technique [0002] Industrial plugs and sockets have the characteristics of fast plugging and unplugging, convenient wiring, reliable electrical contact, good sealing and insulation, waterproof, dustproof, shockproof, and long service life. It can be used in the electrical connection between field mobile power stations and cables and loads. It is widely used in the fields of petroleum, chemical industry, national defense power and transportation, and is more and more popular and selected by users. [0003] Reasonable design and processing of contact parts are very important for the quality of industrial sockets. Many well-known manufacturers in the world have been working on this research for decades. At present, there are two common contact structures: 1) plug-in...

AI Technical Summary

Problems solved by technology

Many famous manufacturers in the world have been committed to research in this area for decades. At present, there are two common contact structures: 1) plug-in contact, which is a plug-in structure type, and the pin is inserted into the elastic socket. In China, the standard contact is often made of brass, but because it is easy to oxidize, the contact resistance is relatively large, and it is easy to cause adhesion and failure to break when subjected to short-circuit current, causing accidents, so it is not widely used; 2) Butt contact, this structure The obvious advantage is that it has a strong ability to withstand short-circuit current, but the contacts must be silver alloy contacts, which are very expensive and difficult to process, and many manufacturers are unwilling to process them.

[0004] For the butt contact type, silver alloy contacts and terminals are often used for high-frequency induction welding at present, and then the overall silver plating is carried out. The cost of silver alloy and silver plating is very high, and the friction of silver plated terminals is poor and easy to expose. Copper oxidation is difficult to be used by many manufacturers

However, it is difficult to process the butt contact that uses silver alloy copper-clad rivet contacts instead of silver alloy integral contacts and nickel-plated terminals for welding.

It is mainly manifested in its welding process. When induction welding or flame welding is used, the nickel plating layer is easy to peel due to the large heating area, and the silver alloy copper-clad rivet is easily detached at the composite part after being heated at high temperature due to the difference in expansion coefficient. Cause low welding yield

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