A welding tool and welding method for realizing zero thinning of friction stir welding seam

Abstract

The invention discloses a welding tool and a welding method for realizing zero thinning of a friction stir welding seam, belonging to the field of friction stir welding. The welding tool is composed of a clamping body, a shaft shoulder and a stirring needle. The end surface of the shaft shoulder is concave, and a spiral groove structure is processed on the concave end surface. When using this welding tool for friction stir welding, first install the welding tool on the main shaft of the welding machine, place the base metal to be welded on the metal backing plate and position it firmly; then start the welding machine, the welding tool starts to rotate and start from the welding point Plunge into the workpiece, when the distance between the outer edge of the shoulder end surface of the welding tool and the upper surface of the workpiece is zero, the welding tool stops pulling down, and then the welding tool travels along the welding track to perform welding. During welding, the inclination angle of the welding tool is 0 °. The invention solves the problems of high cost, low efficiency, narrow application range and the like existing in eliminating the thinning phenomenon of friction stir welding in the prior art.

Description

technical field [0001] The invention belongs to the field of friction stir welding, and in particular relates to a welding tool and a welding method for realizing zero thinning of friction stir welding seams. Background technique [0002] Friction stir welding is a high-quality solid-phase welding technology invented by the British Welding Institute in 1991. Its basic principle is that the high-speed rotating friction stir welding welding tool implements frictional heat and stirring cutting action on the base metal to be welded, so that the base metal to be welded undergoes thermoplastic deformation, and is completed under the rotation of the welding tool and extrusion forging. Weld forming. [0003] The friction stir welding tool consists of components such as shoulders and stirring pins. When traditional friction stir welding welding tools are used for welding, the shoulder needs to exert a certain amount of indentation on the surface of the base metal to be welded, so a...

AI Technical Summary

Problems solved by technology

[0008] The object of the present invention is to provide a welding tool and a welding method for realizing zero thinning of the friction stir welding seam, so as to solve the problems of high cost, low efficiency, and possibility of eliminating the thinning of the friction stir welding seam in the prior art. Issues such as narrow scope of application

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