Friction stir welding device and process for achieving one-side welding and double-side forming by replacing double shaft shoulders

Abstract

The invention discloses a friction stir welding device and process for achieving one-side welding and double-side forming by replacing double shaft shoulders. The friction stir welding device comprises a supporting unit, a connector support and down-pulling units, wherein the connector support is mounted on the supporting unit, a connector forming groove is formed in the top of the connector support, and a to-be-welded product is assembled at the top of the connector support; a profile splicing connector at the bottom of the to-be-welded product is located in the connector forming groove, and the down-pulling units are further connected to the bottom of the to-be-welded product. The friction stir welding process replacing the double shaft shoulders is used for friction welding for sheets with the thickness being 6 mm or below, the problem of assembling clearances of weld roots in friction stir welding is solved, and the one-side welding and double-side forming friction stir welding process is achieved. According to the aluminum alloy one-side welding and double-side forming friction stir welding process, the advantages of small welding deformation, good stability, improvement of welding strength, guarantee of airtightness of weld roots, reduction of the equipment investment cost and reduction of the manufacturing cost are integrated.

Description

technical field [0001] The invention belongs to the field of welding technology, and in particular relates to a friction stir welding welding device and process for replacing double-shaft shoulder single-side welding and double-side forming. Background technique [0002] For the welding of aluminum alloy single-layer plates below 6mm, since the length of the selected stirring pin is slightly smaller than the thickness of the welded part, there are often preparation gaps on the back of the weld, and there are potential dangers that cannot be eliminated in terms of product flaw detection and sealing. The flaw detection fluid cannot be cleaned thoroughly, which affects the judgment of flaw detection; the assembly gap cannot ensure the tightness of the weld seam, resulting in product corrosion. The invention ensures that the penetration depth of the single-shaft shoulder friction stir welding seam is smaller than the thickness of the plate, and the defect of assembly gap exists ...

AI Technical Summary

Problems solved by technology

[0003] Purpose of the invention: The present invention provides a friction stir welding welding device and process that replaces single-sided welding of double-shaft shoulders and double-sided forming. There is a problem of assembly gap, and the friction stir welding single-sided welding and double-sided forming process is realized, and the requirement that the welding penetration is equal to the thickness of the profile plate is effectively realized

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