Stirring head capable of enhancing mechanical property of stirring friction connecting area

Abstract

The invention relates to a stirring head capable of enhancing a mechanical property of a stirring friction connecting area. The stirring head mainly comprises an integrated stirring needle (1), a detachable shaft shoulder (2) and a holding handle (3), and is characterized in that the integrated stirring needle (1) is formed by integrally connecting a column (1-4) to a conical head (1-5); a storage chamber (1-1) is arranged at the upper end of the column (1-4); a conveying hole (1-2) is formed at the center of the column (1-4); a radial spraying hole (1-3) which is communicated with the conveying hole (1-2) is formed on the conical head (1-5); the detachable shaft shoulder (2) is sleeved on the column (1-4); a lower end face of the detachable shaft shoulder (2) is resisted against an upperend face of the conical head (1-5); an upper end of the detachable shaft shoulder (2) is resisted against a lower end of the holding handle (3); a main body of an extruding piston (3-1) is inserted into the storage chamber (1-1); and the other end of the extruding piston (3-1) is connected to a force exerting device (3-2) in the form of extending out of the holding handle (3). The stirring head provided by invention can reduce the phenomena of substrate-thinning and flashing during a friction welding process and can obviously promote the mechanical property of a welded piece.

Description

technical field [0001] The invention relates to a welding tool, in particular to a friction welding stirring head, in particular to a stirring head which can improve the mechanical properties of the friction stir connection area and effectively control the thickness reduction of the friction stir connection area. Background technique [0002] At present, friction stir joining (FSJ for short, commonly known as friction stir welding, or FSW for short) is a solid-phase joining technology, which was invented by the British Welding Institute (TWI) in 1991 (invention patent US5460317). The principle of this technology is The high-speed rotating stirring head is inserted into the workpiece, and heat is generated between the stirring head and the workpiece to make the workpiece in a plastic state, crushed, mixed, and connected together under a certain pressure. [0003] The performance of friction stir connection in the connection area is much higher than that of fusion welding,...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to design a stirring head that can enhance the mechanical properties of the friction stir joint zone in view of the problem that the existing friction welding is prone to welding defects due to the unreasonable design of the stirring head structure.

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