A multi-layer composite coating for a friction stir welding tool

Abstract

The utility model relates to the technical field of friction stir welding head, and disclose a kind of multilayer composite coating's friction stir welding head, including friction subassembly;Part is fixed by fixed subassembly;The adjusting assembly of adjusting friction stir depth;Friction subassembly includes: welding head main body;And install in the lower shaft shoulder of welding head main body inside;Fixed subassembly includes: the first bolt of screw connection in the right side of welding head main body lower end;And first guide slot being opened in the surface of shaft shoulder;The adjusting assembly includes: setting in the lift block of welding head main body inside middle;Connecting block is welded in the left end of lift block.The utility model passes through the screw thread transmission of its on fixed plate when rotating adjusting bolt drives connecting block to go down, connecting block further drives lift block synchronous movement, and then adjust the length that stirring needle extends shaft shoulder, adapt the welding demand of different thickness workpieces, without frequent replacement welding head can complete the welding operation of multiple depth.

Claims

1. A friction stir welding head with a multi-layer composite coating, characterized in that: It includes a friction assembly (1); a fixing assembly (2) for fixing the components; and an adjustment assembly (3) for adjusting the friction stirring depth. The friction assembly (1) includes: a welding head body (101); and a shoulder (102) installed inside the lower part of the welding head body (101). The fixing component (2) includes: a first bolt (201) threaded to the lower right side of the welding head body (101); and a first guide groove (203) formed on the surface of the shoulder (102). The adjustment component (3) includes: a lifting block (301) disposed in the center of the welding head body (101); and a connecting block (302) welded to the left end of the lifting block (301).

2. The friction stir welding head with a multi-layer composite coating according to claim 1, characterized in that: The friction assembly (1) further includes: a stirring pin (103); the stirring pin (103) is installed inside the lifting block (301), the surface of the stirring pin (103) is provided with a bonding coating and a wear-resistant and anti-stick coating, and the lower end of the shoulder (102) is provided with a thermally conductive coating and a wear-resistant coating.

3. The friction stir welding head with a multi-layer composite coating according to claim 1, characterized in that: The fixing component (2) further includes: a second bolt (202) and a second guide groove (204); the second bolt (202) is threadedly connected to the inside of the lifting block (301), and the second bolt (202) passes through the connecting block (302) and the lifting block (301); the second guide groove (204) is formed on the surface of the stirring needle (103).

4. The friction stir welding head with a multi-layer composite coating according to claim 3, characterized in that: The adjustment assembly (3) further includes: an adjustment bolt (303); the adjustment bolt (303) is threaded into the interior of the connecting block (302), and the adjustment bolt (303) passes through the connecting block (302).

5. The friction stir welding head with a multi-layer composite coating according to claim 4, characterized in that: The adjustment assembly (3) further includes: a fixing plate (305); the fixing plate (305) is threaded to the lower surface of the adjusting bolt (303), and the fixing plate (305) is welded to the left end of the welding head body (101).

6. The friction stir welding head with a multi-layer composite coating according to claim 1, characterized in that: The adjustment component (3) further includes a reset spring (304) and a protective plate (306); the reset spring (304) is disposed at the lower end of the lifting block (301); the protective plate (306) is welded to the lower end of the connecting block (302).

7. The friction stir welding head with a multi-layer composite coating according to claim 6, characterized in that: The protective plate (306) is slidably connected to the fixed plate (305), and the protective plate (306) is in close contact with the surface of the welding head body (101).

8. The friction stir welding head with a multi-layer composite coating according to claim 1, characterized in that: The friction assembly (1) is provided with cleaning components (4) on both sides. The cleaning components (4) include: a milling cutter edge (401) and a cutting edge portion (402); the milling cutter edge (401) is welded to the lower sides of the shoulder (102); the cutting edge portion (402) is welded to the lower end of the milling cutter edge (401), and the cutting edge portion (402) is higher than the lower end face of the shoulder (102).

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