Friction-stir welding tool and method of repairing key hole defect by using friction-stir welding tool
A technology of friction stir welding and tools, which is applied in the direction of manufacturing tools, welding equipment, non-electric welding equipment, etc. It can solve the problem of not fundamentally eliminating volume defects, thinning the repair area of metal components, and difficult to repair keyhole defects, etc. problem, to achieve the effects of easy control of material flow at the interface, lower temperature, and promotion of plastic flow and atomic diffusion
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[0041] The present invention will be further described below with reference to the drawings and embodiments.
[0042] Combine Figure 1 to Figure 4 , The friction stir tool of the present invention includes a stirring head 1 and a static shoulder 4 matched with the stirring head. There are six spiral grooves 9 on the bottom surface of the stirring needle 8 of the stirring head. The maximum curvature radius ρ, arc length L and width b of the six spiral grooves are respectively 0.7 times, 0.5 times and 0.1 times of the diameter of the stirring needle. The stationary shaft shoulder is in the shape of a truncated cone with a large top and a small bottom. Its inner diameter is 0.1~0.3mm larger than the diameter of the stirring head shoulder 7 of the stirring head, the lower end outer diameter is 5-10mm larger than the inner diameter, and the upper outer diameter is 20-50mm larger than the inner diameter. Height and details of mixing head ( figure 1 The middle stirring head is located...
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