Patent ID: 11969818
Assignee: HEFEI UNIVERSITY OF TECHNOLOGY
Field: Machine tools (Mechanical engineering)
Classification: CPC B  Y | IPC B

Claim 0:
1. A split-type friction stir welding tool with an adjustable stirring pin length, comprising a stirring tool housing, wherein a clamping handle and a detachable stirring pin are successively mounted in the stirring tool housing towards a welding direction, the clamping handle is provided with external threads on a periphery thereof and in drive connection with an adjusting plate through threads, the adjusting plate is fixedly mounted in the stirring tool housing in a position limiting way, a diameter-adjustable aperture shoulder is mounted between a bottom of the stirring tool housing and the detachable stirring pin in order to compensate for an outside gap between a stirring pin channel of the stirring tool housing and the detachable stirring pin, the detachable stirring pin is a tapered stirring pin, the diameter-adjustable aperture shoulder comprises a top aperture plate, a plurality of rotating blades and a bottom aperture plate, a toothed chain and telescopic columns are arranged at a lower part of the top aperture plate, lower parts of the rotating blades are provided with movable columns while upper parts are provided with telescopic grooves, an upper part of the bottom aperture plate is provided with movable grooves and toothed columns, the toothed chain arranged at the lower part of the top aperture plate engages with the toothed columns arranged at the upper part of the bottom aperture plate, the telescopic columns arranged at the lower part of the top aperture plate stretch into the telescopic grooves arranged at the upper parts of the rotating blades, and the movable columns arranged at the lower parts of the rotating blades stretch into the movable grooves arranged at the upper part of the bottom aperture plate, in order to form the diameter-adjustable aperture shoulder.