Magnetization-degree-adjustable center magnet-embedded type friction stir welding device

Abstract

The invention discloses a magnetization-degree-adjustable center embedded magnet type friction stir welding device. The magnetization-degree-adjustable center embedded magnet type friction stir welding device comprises a hollow-structure motor spindle, a clamping device, a stirring head, a cooling system and a welding workbench, the stirring head is installed in a hollow inner cavity of the motor spindle through the clamping device, a cavity of the stirring head is filled with a cylindrical strong magnet, a hole groove structure is formed in a shaft shoulder, the motor spindle rotates at a high speed to drive the stirring head filled with the cylindrical strong magnet to rotate, the magnetic field intensity of the end face of the shaft shoulder of a magnetic conductive stirring head is changed, and a unlike strong magnet is arranged in a magnetic conductive base plate, so that magnetic field collection is enhanced in a welding seam, electromagnetic force is formed, and plastic metal mechanical stirring in a welding area is enhanced; and plasticized metal flow is promoted, grain structure refinement in the friction stir welding process is improved, and the comprehensive performance is remarkably improved.

Description

technical field [0001] The patent of the invention relates to the field of metal welding processing, and is especially suitable for a new type of friction stir welding stirring head and its application technology. Background technique [0002] In recent years, with regard to the research on "magnetic control" welding technology under electromagnetic action, researchers at home and abroad have focused more on the application of alternating magnetic fields to fusion welding. [0003] For example: Chinese patent CN201820827965.1 discloses equipment for electromagnetic-assisted friction stir welding of high melting point alloys, including a current loading unit, a magnetic field loading unit and a friction stir welding unit, which can realize local loading of high-density pulse current and welding area in the welding process. Strong magnetic field, the friction stir welding unit can realize the friction stir welding process. During the process, the current loading unit and the m...

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Problems solved by technology

[0012] In order to solve the above technical problems, this application provides a center-embedded magnetic friction stir welding device with adjustable magnetization degree: it overcomes the increased welding assistance caused by local loading of high-density current and strong magnetic field on the welding area in the prior art Device problems, and the difference in resistivity between the weld zone and the base metal, and whether the current brought will reach the target in a balanced manner, and the application of an electric field at both ends of the workpiece creates unsafe factors; when welding, it is under the weld of the workpiece Add strong magnets with different names to solve the poor electromagnetic collection effect

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