| 摘要 |
<P>PROBLEM TO BE SOLVED: To arbitrarily adjust dimension of a weaving amplitude of a preceding welding torch and of a succeeding welding torch in accordance with welding condition. Ž<P>SOLUTION: Each shaft is driven and controlled so that, with the torch postures constant of a preceding and a succeeding welding torch, the chip ends of both welding torches weave and that, with the intermediate point between the preceding and the succeeding welding torch as the rotary center, both welding torches oscillate in a weaving amplitude direction Yw; thus, the dimensions of the weaving amplitude of the preceding and the succeeding welding torch are adjusted. In this case, by controlling so that the weaving direction of the preceding welding torch and the oscillating direction of the same torch are in the same direction and that the weaving direction of the succeeding welding torch and the oscillating direction of the same torch 27 are in the opposite direction from each other, the adjustment is made possible so that the dimension of the weaving amplitude of the preceding welding torch is made larger than that of the succeeding welding torch. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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