Split-type friction stir welding tool with adjustable stirring pin length

Patent metadata

Field	Value
Publication number	US-11969818-B1
Application number	US-202318473044-A
Country	US
Kind code	B1
Filing date	Sep 22, 2023
Priority date	Jul 5, 2023
Publication date	Apr 30, 2024
Grant date	Apr 30, 2024

Abstract

A split-type friction stir welding head with an adjustable stirring pin length includes a stirring head housing, where a clamping handle and a detachable stirring pin are successively mounted in the stirring head 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 limited, fixed and mounted in the stirring head housing, and a pore-diameter-adjustable aperture shoulder is mounted between a bottom of the stirring head housing and the detachable stirring pin in order to compensate for an outside gap between a stirring pin channel of the stirring head housing and the detachable stirring pin.

First claim

What is claimed is:

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.

2. The split-type friction stir welding tool with the adjustable stirring pin length according to claim 1 , wherein the adjusting plate comprises a ball screw control shaft and a plurality of balls, a closed path hole and an internal thread that matches with an external thread of the clamping handle are arranged inside the ball screw control shaft, a spiral path hole is formed between the internal thread and the external thread, and both ends of the spiral path hole communicate with those of the closed path hole in order to form a cycle channel and enable the plurality of balls to move continuously and circularly.

3. The split-type friction stir welding tool with the adjustable stirring pin length according to claim 2 , further comprising an arc-shaped buckle, wherein an overlapping portion with a plurality of fixing gears is arranged in a circumferential direction outside the ball screw control shaft, the overlapping portion is carried on a step inside the stirring tool housing, an arc-shaped groove is formed in a circumferential direction of the stirring tool housing, the matched arc-shaped buckle is mounted in the arc-shaped groove, racks that are buckled with the fixing gears correspondingly are arranged on an inner side wall of the arc-shaped buckle, and a top of the inner side wall of the arc-shaped buckle is provided with a limiting buckle which is used for preventing the overlapping portion from moving upwards.

4. The split-type friction stir welding tool with the adjustable stirring pin length according to claim 1 , wherein an upper part of the clamping handle is a rectangular block structure while a lower part is provided with an internal thread, and the internal thread is in threaded connection with the external thread at an upper end of the detachable stirring pin.

5. The split-type friction stir welding tool with the adjustable stirring pin length according to claim 4 , wherein a top of the rectangular block structure is provided with a plurality of catch bolts, and the plurality of catch bolts tightly resist to a bottom end of a clamping arm of a motor through height adjustment.

6. The split-type friction stir welding tool with the adjustable stirring pin length according to claim 1 , wherein an upper part of the stirring tool housing is provided with a flange plate, and a circumferential direction of the flange plate is provided with a plurality of fixing holes, through which the flange plate is fixedly connected with a rotating shaft of the motor.

7. The split-type friction stir welding tool with the adjustable stirring pin length according to claim 1 , wherein a diameter of each of circular holes formed in the top aperture plate and the bottom aperture plate is equal to that of a middle cylinder of the detachable stirring pin.

8. The split-type friction stir welding tool with the adjustable stirring pin length according to claim 1 , wherein a cylindrical internal thread hole is formed in a lower bottom end of the stirring tool housing, a bottom end of the bottom aperture plate is provided with a concentric circular ring, and a bottom plate external thread in corresponding fit with the cylindrical internal thread hole is arranged on an upper periphery of the bottom aperture plate.

9. The split-type friction stir welding tool with the adjustable stirring pin length according to claim 1 , wherein the detachable stirring pin comprises a tapered stirring pin line with a lower part equipped with threads a middle cylinder, a middle-upper rectangular column and a cylindrical fixing end with an upper part equipped with the external thread.

Assignees

• Univ Hefei Technology

Inventors

• Wang Jingfeng
• Li Beibei
• He Pengcheng
• Liu Ao

Classifications

• B23K20/1245 Primary

  characterised by the apparatus · CPC title

• B23K20/1255 Primary

  Tools therefor, e.g. characterised by the shape of the probe · CPC title

• Y02P70/10

  Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working · CPC title