Semi-solid deposition pressure welding device for dissimilar metals

Abstract

The invention relates to a semi-solid deposition pressure welding device for dissimilar metals. The device comprises a pressure control device, a temperature control device, a gas protection device and a die assembly, wherein the pressure control device is connected with the die assembly and transfers pressure to the die assembly; a heating coil in the temperature control device is arranged outside the die assembly; a temperature control signal is used for regulating and inducing the magnitude and on / off of the current of the heating coil so as to control the heating process of the die assembly; and the gas protection device is connected with the die assembly and inputs protection gas into the die device. The semi-solid deposition pressure welding device for dissimilar metals provided by the invention is easy to operate and has the advantages of simple structure, excellent welding effect and good market prospect.

Description

technical field [0001] The invention belongs to a welding device, in particular to a semi-solid cladding pressure welding device for aluminum alloy and other dissimilar metals. Background technique [0002] The dissimilar metal connection structure has the excellent performance of the combination of the two materials, and has been widely used in the fields of national defense and national production, and its application prospects continue to expand. However, due to the huge differences in the physical, chemical and mechanical properties of dissimilar metals, the requirements for the connection method are relatively strict. At present, mechanical connection, adhesive bonding, welding and other methods are generally used, mainly mechanical connection and adhesive bonding or a combination of the two. However, there are many disadvantages in mechanical connection and adhesive bonding, such as low strength, large structural quality, and redundant objects during bonding. questio...

AI Technical Summary

Problems solved by technology

Due to the poor flexibility of the friction stir welding process, while the diffusion welding needs to be carried out in a vacuum chamber and the efficiency is relatively low, these solid phase connections are limited in actual production applications

However, when conventional fusion welding methods such as TIG welding and MIG welding are used for welding dissimilar metals, the following problems are prone to occur: 1. Metallurgical incompatibility, forming brittle compound phases at the interface; 2. Thermal and physical properties do not match, resulting in residual stress; 3. The large difference in mechanical properties leads to mechanical mismatch at the connection interface and serious stress singular behavior

Seriously affect the performance of dissimilar metal joints

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