| 摘要 |
PROBLEM TO BE SOLVED: To provide a friction stirring welding method that quickly softens members to be joined, that prevents the members from being tucked up and that thereby enables a welded product to have a superior joined condition, in joining and integrating cross-sectionally circular members at a planned weld zone in the circumferential or the longitudinal direction. SOLUTION: Two cross sectionally circular members 1, 1 to be joined are abutted on each other, with a rotary probe 13 inserted into this abutted part, a probe which is projectingly provided freely rotatably as one unit with a rotor 11 on the axial line of its shoulder 12. The members 1, 1 to be joined are rotated so that the probe 13 successively passes through the abutted part, with the probe inserted, in the manner that a part A on the side of the moving direction of the members at the shoulder 12 of the rotor 11 is pressed against the members, and also in the state that a part B2 on the opposite side in the rotating direction of the members is floated above the surface of the members. |
