Magnetic field adjustable block rotating magnetic field auxiliary stationary shaft shoulder friction stir device

Abstract

The invention relates to a magnetic field adjustable block rotating magnetic field auxiliary stationary shaft shoulder friction stir device. The device is achieved through cooperation of a rotating main shaft, a clamping device, a stirring head, a magnetic conduction base plate, a stepping motor, a supporting plate, a magnetic field adjusting device, an auxiliary stationary shaft shoulder device, a pressure sensor, a thermocouple and a cooling device. A stirring needle is of a prismatic table structure, a weak magnetic groove is formed in the bottom end face and rotates at a high speed along with the main shaft, and a rotating magnetic field distributed in a block manner with the center of the stirring needle as the axis is formed. Strong magnetic strips with heteropolar magnetic poles are arranged in a workbench base plate in a matched manner, gathering of magnetic force is enhanced, electromagnetic force is formed in a weld joint, mechanical stirring of plastic metal in a weld joint area is enhanced, flowing of the plastic metal is promoted, and the welding quality is improved. The pressure sensor and the thermocouple are arranged on the lower portion of a stationary shaft shoulder sleeve, feedback data are monitored in real time, the stepping motor is arranged on a stationary shaft shoulder sleeve connecting rod, the supporting plate is matched with a spring, and self-adaptive adjustment of the magnetic field intensity is achieved.

Description

technical field [0001] The patent of the present invention relates to the field of metal welding processing, in particular to a brand-new friction stir welding device. 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. 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 locally load high-density pulse current and strong magnetic field on the welding area during the welding process , The friction stir welding unit can realize the friction stir welding process. During the process, the current loading unit and the magnetic field loading unit move synchronously with the stirring head....

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Problems solved by technology

[0004] In order to solve the above technical problems, this application provides a magnetic field adjustable block rotating magnetic field assisted static shoulder friction stir device, which overcomes the DC Applying a constant magnetic field between the wires will cause the wires to generate a force in one direction, and the resistivity between the weld zone and the base metal is different, and the applied current cannot reach the target in a balanced manner, so that the weld metal cannot be uniformly Stirring, resulting in poor welding effect

Due to the local loading of high-density current and strong magnetic field on the welding area in the existing technology, the addition of welding auxiliary equipment and the application of electric fields at both ends of the workpiece create unsafe factors; during welding, a strong magnet with a different name is added below the weld seam of the workpiece to solve the electromagnetic problem. Pooling is poor

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