Method and device for realizing flexible inner support of friction stir welding by using electromagnetic technology

Abstract

The invention discloses a method and device for achieving stirring friction welding flexible inner supporting through an electromagnetic technology. The device mainly comprises an external electromagnetic generation device, an internal electromagnetic supporting device and an electrical control cabinet. The internal electromagnetic supporting device mainly comprises a supporting wheel, an internal supporting frame and internal electromagnets. The external electromagnetic generation device mainly comprises an external supporting frame and external electromagnets. The adopted method comprises the specific steps that by means of the characteristic that anisotropic magnetic fields can penetrate through a nonferromagnetic material to attract each other, an anisotropic electromagnetic supporting device on the back portion of a welding seam is attracted through the external electromagnetic generation device, and a flexible inner supporting function of the nonferromagnetic material which is provided with a reserved small hole and is of a sealed structure is achieved, so that an effective inner supporting effect is achieved on the back portion of the welding seam, and the device can be taken out from the reserved hole of a sealed barrel body when welding is completed. According to the method and device for achieving stirring friction welding flexible inner supporting through the electromagnetic technology, the effect that the supporting force is provided by external electromagnetic attraction force instead of being provided inside the sealed barrel body is achieved; and the device is simple in structure and easy to take out, and the size of the device is decreased.

Description

technical field [0001] The invention relates to a method and a device for a friction stir welding internal support, in particular to a method and a device for realizing a flexible internal support for friction stir welding by using electromagnetic technology. Background technique [0002] Friction stir welding is a new type of solid-phase connection technology. The friction heat generated by the friction between the shaft shoulder and the stirring needle and the workpiece is used to make the material near the welded joint reach a plastic state, and the fluidity of the material increases. When the stirring head moves forward, the plasticity Under the extrusion of the shaft shoulder and the stirring of the stirring needle, the material is moved to the rear of the stirring head and cooled to form a welded joint. Friction stir welding technology has the following characteristics: no fusion welding defects, small welding deformation, simple operation, and applicable to various ma...

AI Technical Summary

Problems solved by technology

Similar "magnetic levitation technology" is used in trains, support devices, and buffer devices, but it uses the principle of repulsion of the same-sex magnetic field. If it is applied to the inner support structure, it needs to have rigid support inside, and the volume is large and the structure Complicated and difficult to remove, generally not suitable for support devices in closed structures

Electromagnetic attraction is used in electromagnetic heavy-duty cranes and gantry cranes, but they are all direct contact attraction, and the number of electromagnets cannot be adjusted

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