Friction stir welding equipment for stationary shaft shoulder

Abstract

The invention relates to the technical field of friction stir welding, and discloses friction stir welding equipment for a stationary shaft shoulder. The friction stir welding equipment comprises a base and a rectangular box; and a jacking block is fixedly mounted in the middle of the top end of the base, a transverse plate is fixedly mounted on the top of the jacking block, and a control unit isfixedly mounted on the obverse side of the jacking block. According to the friction stir welding equipment for the stationary shaft shoulder, by forming a square opening and a collecting box, when thebottom of a stirring needle body conducts friction welding on a workpiece, waste materials generated at the time penetrate through a gap between a stationary shaft shoulder body and the stirring needle body to enter the collecting box, the cross sectional area of the side face of the square opening is equal to the cross sectional area of the side face of the collecting box, thus the collecting box can be taken out of the stationary shaft shoulder body, the problem that the waste materials in the stationary shaft shoulder body are difficult to dispose is prevented, meanwhile, the situation that rotating of the stirring needle body is affected by the excessive waste materials in the stationary shaft shoulder body is also avoided, and the practicality of the friction stir welding equipment is improved.

Description

technical field [0001] The invention relates to the technical field of friction stir welding, in particular to a friction stir welding equipment for a stationary shaft shoulder. Background technique [0002] Friction stir welding is a solid phase joining technology invented in 1991, especially suitable for welding low melting point alloys such as aluminum. Friction stir welding uses the friction heat generated by the shaft shoulder and the friction between the stirring needle and the workpiece to make the material near the welded joint reach a plastic state, and the fluidity of the material increases. Under the stirring action of the stirring needle, it is moved to the back of the stirring head and cooled to form a welded joint. During the welding process, the material is not melted, and the maximum temperature is about 80% of the melting point of the material to be welded. [0003] The usual friction stir welding is unstable in the welding process, and the flash defects ar...

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Problems solved by technology

[0004] The invention provides a friction stir welding equipment for static shaft shoulders, which has the advantages of easy removal of waste materials and easy disassembly and replacement of stirring pins, and solves the problem of instability in the welding process of ordinary friction stir welding and serious flash defects, thereby In view of the above problems, a static shoulder friction stir welding was proposed to improve it. Therefore, adding an auxiliary static shoulder can not only reduce the flash, but also inhibit the plasticized material from being extruded from both sides of the rotating stirring needle, preventing defects such as holes. However, when the existing static shoulder friction stir welding is in operation, due to the gap between the static shoulder and the stirring needle, some waste materials will enter the gap during the welding process, which not only makes it difficult to clean up later, but also At the same time, the excessive accumulation of these waste materials in the static shoulder will affect the rotation of the stirring needle, and the stirring needle will be in contact with the outer surface of the workpiece for a long time, resulting in relatively high friction damage and easy damage to the stirring needle. A problem that makes it inconvenient for maintenance personnel to remove and replace it

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