| 摘要 |
PROBLEM TO BE SOLVED: To excellently, easily and inexpensively perform a friction bonding by the simple temporary bonding simultaneous with the butt-welding of hollow shapes, and the load supporting during the friction bonding. SOLUTION: The hollow shape pair have temporary welded parts 18, 19 which are welded with a free end piece 21 to one of at least face plates 1 and one of back plates 2 to bonding ends 11a, 12a of a pair of hollow shapes 11, 12 by a butted part 13 of the face plates 1 and a butted part 14 of the back plates 2, and temporarily welded in the butted state by the elastic fitting in the butting direction, and strut parts which strut between a strut part 15 between the butted parts 13, 14, or a strut part which strut between the butted parts 13 and a back plate middle part 13b and strut between the butted part 14 and a face plate middle part 14b. COPYRIGHT: (C)2007,JPO&INPIT |
