Friction-stir welding device and method thereof

A welding device and friction stir technology, applied in welding equipment, non-electric welding equipment, metal processing equipment, etc., can solve the problems of flash, limited mechanical properties of welds, thinning of welds, etc., to avoid welds. The effect of thinning, eliminating welding flash and improving weld structure
CN106563878AInactive Publication Date: 2017-04-19SHANGHAI AEROSPACE EQUIP MFG GENERAL FACTORY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI AEROSPACE EQUIP MFG GENERAL FACTORY
Publication Date
2017-04-19
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a friction-stir welding device. The friction-stir welding device comprises an ultrasonic generator, a variable-amplitude static shaft shoulder, a stirring needle and a mounting base, wherein the ultrasonic generator is in a hollow cylinder shape; the variable-amplitude static shaft shoulder is provided with a mounting opening in one end and coaxially and rigidly connected with the ultrasonic generator; the stirring needle, the ultrasonic generator and the variable-amplitude static shaft shoulder are coaxially mounted, and the non-operating end of the stirring needle is connected with a machine head spindle of the friction-stir welding device; and the mounting base is rigidly fixed to the ultrasonic generator. The invention further provides a method for conducting friction-stir welding on a workpiece through the friction-stir welding device. According to the method for conducting friction-stir welding on the workpiece through the friction-stir welding device, thinning of a weld joint can be effectively avoided through the non-rotational variable-amplitude static shaft shoulder; through high-frequency vibration of the variable-amplitude static shaft shoulder, welding flanges can be completely eliminated; and power ultrasounds are input into weld joint metal through the variable-amplitude static shaft shoulder, the structure of the weld joint can be optimized, and the mechanical performance of the weld joint is improved.
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Description

technical field

[0001] The invention relates to the technical field of friction stir welding, in particular to a friction stir welding device and method thereof. Background technique

[0002] As a solid-phase joining method based on micro-forging, friction stir welding has achieved great success in welding aluminum alloys. figure 1 It is a schematic diagram of the traditional friction stir welding structure. refer to figure 1 , friction stir welding includes a stirring pin 11 and a shaft shoulder 12. During the welding process of friction stir welding, the heat generated by the friction between the high-speed rotating stirring pin 11 and the workpiece is used to locally plasticize the material to be welded. When the stirring pin 11 moves along the welding interface When moving, the plasticized material moves from the front of the stirring needle 11 to the rear under the rotating friction of the stirring needle 11, and forms a dense solid-phase weld under the extrusion of...

Claims

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