Welding method for multi-layer metal strip

Abstract

The invention relates to a welding method for a multi-layer metal strip. The method is characterized by comprising the following steps of: stacking the multi-layer metal strip to be welded to reach the required thickness, and aligning the multi-layer metal strip with the weld of another stacked multi-layer metal strip or metal plate; fixing a welding guiding plate of which the thickness is the same as that of the multi-layer metal strip to be welded at the starting end of a weld joint along the welding direction; selecting a stirring head, wherein the diameter of a shaft shoulder of the stirring head is 2 to 3 times the plate thickness, the length of a stirring needle on the stirring head is 0.05 to 0.2mm less than the plate thickness, and the press amount of the shaft shoulder is 0.1 to 0.3mm; and selecting rotation speed and welding speed according to a welding material, and welding. The method is energy-saving and environment-friendly, an operation process is greatly simplified, and production efficiency is improved; the quality of a joint is improved, the conductivity of the joint is ensured, and production cost is reduced; controllability is high, and industrial application is easy to implement; and the obtained joint has a compact structure, does not have any pore or crack and is slightly deformed, the operation process is simple, the production period is short, efficiency is high, and the production cost is low.

Description

technical field [0001] The invention relates to a welding method for multilayer metal strips, which is suitable for the connection between multilayer metal strips and between multilayer metal strips and metal plates. The method has the advantages of simple operation process, low production cost, high efficiency, high joint quality, good reliability and easy popularization and application. Background technique [0002] Metal strips (such as aluminum strips, copper strips) have good plasticity, electrical conductivity, thermal conductivity, and easy bending and deformation. An important part in the production of high-end devices such as rectifiers and their installation. Therefore, in the field of electronics industry, a large number of connections between multi-layer metal strips and other components are involved. This connection can adjust equipment installation errors, shock absorption, and facilitate testing and equipment maintenance. At present, this kind of connection ...

AI Technical Summary

Problems solved by technology

The generation of these defects makes it possible to ensure the effective conductive area of ​​the joint only by increasing the number of layers of metal strips

In addition, the use of fusion welding technology for welding requires a lot of time to complete the preparation work before welding, and also consumes a lot of shielding gas, etc.

These not only seriously reduce the production efficiency, but also increase the production cost to a large extent

On the other hand, when bolted connection is used, the interface is easily oxidized due to the lack of close contact between the metal layers, and the contact interface is easily burned when the power is turned on.

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