| 摘要 |
PROBLEM TO BE SOLVED: To obtain necessary bonding strength, to prevent occurrence of useless deformation, to enable the facilitation of manufacture, and make a cost low, when metallic sheets are joined after being butted in the flush state. SOLUTION: A first sheet 1b and a second sheet 1c of the metallic sheets to be butted are formed into a rugged shape which can be fit and flush joined. This joining line 2 is formed by the reference lines 3 and a pressurizing line 4 which connects between the reference lines 3 and the circumferential parts are taken as parts 5 to be pressurized. The gap of the joining line is set to a size which can be fit size and a size filled up by plastic deformation. Next, a plurality of punches 6 with which press action is performed to the parts 5 to be pressurized, a receiving die 7 for receiving the press, a positioning shaft 10 for positioning, side support dies 9 of a support in the horizontal direction, and the upside support die 8 of a support in the thickness direction are arranged. The parts 5 to be pressurized are formed into recessed parts 11 having the depth of 10-20% of the thickness of the first and the second sheets 1b, 1c with a press and the first sheet 1b and the second sheet 1c are joined by filling up the joining line 2 by the plastic deformation. COPYRIGHT: (C)2004,JPO&NCIPI
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