Double-speed double-shaft-shoulder internal material supplementing type friction stir welding device

Abstract

The invention relates to a double-speed double-shaft-shoulder internal material supplementing type friction stir welding device which comprises a double-speed double-shaft-shoulder mechanism and a material supplementing system, and the double-speed double-shaft-shoulder mechanism comprises a stirring needle, an upper shaft shoulder, a string bearing and a lower shaft shoulder. The double-speed double-shaft-shoulder mechanism is provided with the upper shaft shoulder and the lower shaft shoulder so that the problems that clamping is complex and the tool cost is high can be solved, the working rotating speeds of the upper shaft shoulder, the lower shaft shoulder and the stirring needle are respectively controlled to improve the welding quality, the welding of a space curved surface structure is achieved through control over the two rotating speeds, the material supplementing system mainly comprises a material supplementing part, a rotating sealing connector, a material supplementing conveying pipe and a heating conveying device, in the double-shaft-shoulder friction stir welding process, the supplementary material required by welding is conveyed to a welding area through the material supplementing system, welding and supplementing of the supplementary material are adopted at the same time, defects such as cavities, tunnels, toe heels and cracks in the welding process are avoided, and the welding quality and the welding strength of friction stir welding are improved.

Description

technical field [0001] The invention relates to the technical field of friction stir welding, in particular to a double-speed double-shaft shoulder internal feeding type friction stir welding device for welding processing. Background technique [0002] Friction stir welding is a solid-phase welding method. Through the friction heat between the rotating shoulder and the stirring pin and the metal to be welded, as well as the extrusion and stirring of the stirring pin, the welded metal undergoes plastic flow to form a firm connection. . Friction stir welding is widely used in the welding of high-performance metal materials such as aluminum alloy and magnesium, which avoids the defects such as air holes and cracks caused by traditional welding techniques when welding such materials, enhances the quality of the weld seam, and reduces the joint Deformation saves welding materials. Friction stir welding has the advantages of beautiful weld shape, good comprehensive mechanical pr...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a double-speed double-shaft internal feeding friction stir welding device, in order to solve the defects such as cavities, tunnels, toes and cracks that are prone to occur in the friction stir welding process, and at the same time improve the friction stir welding thickness and be welded The complexity of the welded structure increases the scope of application

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