Connection method of silver, copper and zinc belt-shaped solder and special connection device used in connection method

Abstract

The invention discloses a connection method of silver, copper and zinc belt-shaped solder and a special connection device used in the connection method. According to the connection method, firstly, oxides on connection faces, to be connected, of two solder belts are removed; the connection portions of the solder belts are placed between an upper copper plate and a lower copper plate after being clamped and overlapped through the upper copper plate and the lower copper plate, and the contact faces of the solder belts are coated with silver solder flux and are placed between an upper pressure column and a lower supporting column; the upper pressure column falls downwards so as to tightly press the connection portions and keeps certain pressure; the upper copper plate and the lower copper plate are heated through an upper conductive electrode and a lower conductive electrode, so that the connection portions of the overlapped solder belts are heated and melted, the surfaces of the upper and lower copper plates are wetted through the melted solder, the surfaces of the copper plates are uniformly laid, the connection portions become thinner under pressure of the upper copper plate and the lower copper plate, redundant solder forms flash, the flash is cut off, the upper copper plate and the lower copper plate are worn off, and then connection is achieved. Materials of connectors of the solder belts are uniform, strength of the materials of the connectors of the solder belts is the same as that of base metal, and connection requirements in the rolling process of the silver, copper and zinc belt-shaped solder can be met. Meanwhile, the special connection device for the method is simple in structure and convenient to operate.

Description

technical field [0001] The invention relates to the connection of metal strips, in particular to a connection method of silver-copper-zinc strip-shaped solder, and also relates to special connection equipment used in the connection method. Background technique [0002] Silver-copper-zinc solder is a multi-component alloy mainly composed of silver-copper-zinc solid solution. This type of solder has excellent process performance, the melting temperature is not high, and the melting range is 600 ° C to 800 ° C; the wetting performance and joint filling performance are good. The brazing seam formed by brazing has high strength, and the tensile strength of the brazing seam is between 300MPa and 450MPa; the brazing material has excellent properties such as plasticity, conductivity, and corrosion resistance. Silver-copper-zinc ribbon solder is widely used in brazing of diamond tools, brazing of machining tools, brazing of woodworking tools, brazing of steam turbine components and b...

AI Technical Summary

Problems solved by technology

[0005] 1. The size of the front and rear ends of the solder strip is not accurate;

[0006] 2. The shape of the front and rear ends of the solder strip is not good, and warpage occurs

[0007] 3. The front part of the solder strip is not well occluded when it is rolled and fed into the material

But when using this method to connect the solder, the two solder strips must be overlapped, and there is a certain distance between the solder joints, which will cause two problems: 1. The solder strips are not completely melted and connected, and they are easy to break during subsequent rolling ; 2. The thickness of the joint of the solder strip is twice the thickness of the solder strip, and it is easy to break when the rolling ratio is too large during subsequent rolling

Therefore, the connection method using existing metal strips cannot meet the connection requirements of solder strips

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