Copper and aluminum transition connection terminal soldering method

Abstract

The invention discloses a copper and aluminum transition connection terminal soldering method. It can be ensured that copper and aluminum connection terminal welding interfaces are tightly combined through the copper and aluminum transition connection terminal soldering method, the resistance of two metal welding faces is the resistance of tin, performance is quite stable, the rejection rate is smaller than 1%, and the defects that traditional methods such as flash welding, friction welding, braze welding and cold welding need special equipment or special processing materials, and the rejection rate is high are effectively overcome. According to the copper and aluminum transition connection terminal soldering method, no special material is adopted, a blocking layer and a weld assisting layer are formed through rosin, and the problems of the low binding face strength and insufficient soldering caused by surface oxidization in aluminum material welding can be effectively solved. The copper and aluminum transition connection terminal soldering method can be applicable to occasions in power industry, petroleum industry, chemical engineering industry and the like needing copper and aluminum terminals, and has the good market prospect.

Description

technical field [0001] The invention belongs to the technical field of copper-aluminum transition clamps in power transmission and transformation lines, and is mainly used in the soldering process of copper-aluminum transition connection terminals. Background technique [0002] The reserves of aluminum in my country are higher than the reserves of copper, and the wire and cable industry is one of the industries that consume the most copper. For the power grid, aluminum alloy cables and auxiliary products can replace copper cables in power transmission within a certain range. One of the key components in the use of aluminum alloy cables is the copper-aluminum transition connection terminal. Similar to traditional cable joints, copper-aluminum transition connection terminals are also affected by factors such as electricity, heat, machinery and the environment. There will be a potential difference at the interface, which will generate heat under the action of current, causing th...

AI Technical Summary

Problems solved by technology

The above welding methods have their advantages, but they also have disadvantages. Among them, flash welding and friction welding require special welding tools, the process is more complicated, and the cost is high. Brazing requires special solder, and the scrap rate is high. Therefore, in There are certain limitations in practical use

For the soldering of copper and aluminum, there are mainly copper tubes and aluminum plates, aluminum enameled wires and copper wires, but they all need to be treated with special soaking solutions, and for aluminum rods (with a cross-sectional area greater than 70mm 2 ) and copper rod (cross-sectional area greater than 70mm 2 ) There is no report on the use of tin welding, but the welding of aluminum rods and copper rods is a necessary step in the production of copper-aluminum transition terminals

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