| 摘要 |
PROBLEM TO BE SOLVED: To secure the junction strength of a joined portion obtained when subjecting a work having a curved surface, such as a cylinder, to friction stir joining. SOLUTION: A cylindrical body 24 is formed such that a main surface 16, which is longer by the amount of sags 22a, 22b in the X direction than a rear surface 18, is exposed as an outer peripheral wall surface having a circumference length longer than an inner peripheral wall surface side. A probe 34 of a tool 30 for the friction stir joining is buried in a contact portion formed by bringing the sag 22a into contact with the sag 22b, and the thickness of the end surfaces 12, 14 is plastically fluidized by rotating the probe 34. COPYRIGHT: (C)2005,JPO&NCIPI |
