FRICTION STIR TOOL AND METHOD FOR USING IT

摘要

PROBLEM TO BE SOLVED: To provide a friction stir tool by which a bonding part and an agitating part in which burrs and internal defects or the like hardly occur are easily formed and a method for use such as a bonding method using the tool. SOLUTION: The friction stir tool 1 is provided with a columnar tool main body 2 and an agitating pin 10 which droops from the central part of the bottom surface 3 of the tool main body 2, a ring shaped projecting part 4 is formed near the peripheral edge of the bottom surface 3 of the tool main body 2, a pillar shaped body (projecting body) 8 which droops nearer to the bottom surface 3 than the ring shaped projecting part 4 is formed between the ring shaped projecting part 4 and the agitating pin 10 and also an outside metal pool part 6 is positioned between the ring shaped projecting part 4 and the pillar shaped body 8, and moreover an inside metal pool part 9 is positioned in the bottom surface 3 side of the pillar shaped body 8.