Ultrasonic-assisted friction stir welding device

Abstract

The invention discloses an ultrasonic-assisted friction stir welding device. The ultrasonic-assisted friction stir welding device comprises a bearing frame, a supporting arm and a limiting strip; a hydraulic cylinder is installed inside the bearing frame; a first board and a second board are installed above the bearing frame from left to right; a fixed magnet is fixed to the upper portion of the side face of the supporting arm; the limiting strip is connected with a sliding groove through connection blocks on the two sides; contact rods are arranged on the upper surface of the first board andthe upper surface of the second board; the first board and the second board are each internally provided with a metal plate and an electromagnetic coil; the lower portions of the metal plates are connected with wires; a fixed head is fixed below a protection cover and connected with a friction plate through a heat conductive plate fixed to the inner surface; and an ultrasonic generator is fixed inside the protection cover. According to the ultrasonic-assisted friction stir welding device, a welding head is in a fixed state when a stirring head rotates, the stirring head transfers heat to the welding head, the stirring head and the welding head perform hot melting on plates at the same time, and the welding efficiency is improved.

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 ...

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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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