| 摘要 |
PROBLEM TO BE SOLVED: To obtain a high strength structure using advantage of friction stir welding by effectively avoiding an L-shaped part or a part rectangularly bent through a radiused shape part in a structure having such parts. SOLUTION: In a manufacturing method of the structure in which a side, a floor and a roof structural units (units) 1, 2, 3 are joined to each other directly or through auxiliary shape materials, the method consists of a process in which auxiliary shape materials are preliminarily jointed to each unit and in which the units are each manufactured so that the joined parts between the units are roughly flush with the side face of the structure; a process in which, with the floor unit 2 installed on a frame, the floor unit 2, and the roof unit 3 are each fixed to the side unit 1 using fixing tools placed oppositely in the width direction of the structure, and in which the joined parts roughly flush with each other between the units are horizontally extended along the outer face or the inner face of the side unit 1; and a process in which a moving rail is arranged along the weld line extending the horizontal direction of the joined parts and in which a bobbin tool 10 is made to run on the moving rail so that the joined parts are welded by friction stir welding. COPYRIGHT: (C)2004,JPO
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