| 摘要 |
<p>Projecting segments (12b,22b) of face plates of hollow members (10,20) are friction stir welded from above. Next, a connecting member (30) is placed on the upper face plates (11,21) of the hollow members (10,20), and is friction stir welded from above. The welding region exists at the node between a rib connecting the two face plates (11,12,21,22) and the face plate (11,21). The joints of the connecting member (30) and the respective face plates (11,21) are lap joints, not butt joints. Therefore, the hollow members could be welded with ease, even though there exists manufacturing tolerance, or tolerance in arrangement of the hollow-shaped materials (10,20). Locating projections (37) are provided. Welding of the hollow members from one side is achieved, regardless of the size accuracy of the hollow members, to form a joint with high strength. <IMAGE></p> |
