Friction stir welding fixture in mechanical trigger control mode and method for controlling friction stir welding fixture

Abstract

The invention discloses a friction stir welding fixture in a mechanical trigger control mode and a method for controlling the friction stir welding fixture. The friction stir welding fixture comprises a fixture base, a control unit, a trigger element, limit switches and a plurality of pressure plates; each pressure plate is connected with a pressure plate cylinder, each pressure plate cylinder corresponds to at least one limit switch and is controlled by the corresponding limit switches, and the limit switches and the pressure plate cylinders are connected with the control unit; and the trigger element and the limit switches are matched with one another and are mounted on a friction stir welding head. The pressure plate cylinders are controlled by the mechanical trigger type limit switches and the trigger element, possibility of malfunction of the pressure plate cylinders is eliminated, the pressure plates are driven by the pressure plate cylinders to be automatically opened before the welding head moves to the pressure plates during movement, and are reset to press workpieces after the welding head passes the pressure plates, the integral fixture is automatically controlled and is reliable in running, and the cost is lowered.

Description

technical field [0001] The invention relates to a welding jig, and specifically belongs to a mechanical trigger control mode jig for friction stir welding, especially suitable for polygonal welds, closed curve welds or irregular shapes. Background technique [0002] Friction Stir Welding (FSW) was invented by the British Welding Institute (TWI) in 1991, which is an innovative solid-phase joining technology, which is derived from traditional friction welding and is more suitable for long and straight welds of welding. Compared with the traditional fusion welding method, friction stir welding has the advantages of fine weld grain, no smoke, no spatter, no porosity, no solder, no protective gas during welding, small stress and deformation of the workpiece after welding, etc., especially Suitable for aluminum alloy welding. [0003] Friction stir welding is a purely mechanized continuous solid-phase joining method, such as figure 1 As shown, during the welding process, a cyli...

AI Technical Summary

Problems solved by technology

At present, the opening and closing of the pressure plate is mainly controlled by the pressure plate cylinder, and the pressure plate cylinder is controlled by a photoelectric sensor. When stirring welding, the welding head will produce strips of extruded materials, and these extruded materials will be photoelectric. The sensor causes interference, which in turn causes the malfunction of the platen cylinder

Images