An Ultrasonic Assisted Friction Stir Welding

Abstract

The invention discloses an ultrasonic-assisted friction stir welding, which comprises a load-bearing frame, a support arm and a limit bar. A hydraulic cylinder is installed inside the load-bearing frame, and a first plate surface is installed above the load-bearing frame from left to right. and the second board surface, a fixed magnet is fixed above the side of the support arm, the limiting bar is connected to the chute through the connecting blocks on both sides, and the upper surfaces of the first board surface and the second board surface are set There is a contact rod, and a metal sheet and an electromagnetic coil are installed inside the first board surface and the second board surface, a wire is connected under the metal sheet, a fixed head is fixed under the protective cover, and the fixed head passes through the inside The surface-fixed heat conducting sheet and the friction sheet are connected to each other, and an ultrasonic generator is fixed inside the protective cover. In the ultrasonic-assisted friction stir welding, when the stirring head rotates, the welding head is in a fixed state, and the stirring head transfers heat to the welding head, and the stirring head and the welding head heat-melt the plate at the same time, which improves the welding efficiency.

Description

technical field [0001] The invention relates to the technical field of friction stir welding, in particular to ultrasonic-assisted friction stir welding. Background technique [0002] Friction stir welding uses frictional heat and plastic deformation heat as the welding heat source. A cylinder or other shaped stirring needle is inserted into the joint of the workpiece. Through the high-speed rotation of the welding head, it rubs against the material of the welding workpiece, so that The temperature of the material at the joint is raised and softened, and at the same time, the material is subjected to friction stir to complete the welding. In order to improve the efficiency of friction stir welding, the existing friction welding is assisted by ultrasonic waves, and the ultrasonic waves are used to refine the welded plate and reduce the strength of the welded plate. [0003] However, the existing friction stir welding still has the following problems: [0004] 1. Ultrasonic ...

AI Technical Summary

Problems solved by technology

[0004] 1. Ultrasonic transmission is weak and the refinement efficiency is low;

[0005] 2. During welding, there is a lack of pressing on the plate. Once the stirring head is tilted during welding, it will affect the welding effect of the plate;

[0006] 3. When welding, it is inconvenient to fix the plates. The same worktable can only fix plates with one welding method, so it cannot meet the two operation methods of splicing welding and lap welding at the same time.

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