| 摘要 |
PROBLEM TO BE SOLVED: To provide a seam welding method corresponding to the reduction in the width of a flange and the speed-up of a seam welding rate, and to provide seam welding equipment for performing the method. SOLUTION: In the method, using equipment X1 provided with: an operational part 10 having a means 13 for controlling the rotational displacement of a work W having a flange part F, and displacing the work W; a pair of electrode rings 22 performing welding as the flange part F is held; and a means 23 for detecting the deviation D between a weld planned line and the front edge of a weld locus in the flange part F, the flange part F is subjected to seam welding. The work W is displaced by the operational part 10 so that the pair of electrode rings 22 perform the welding along the flange part F as the rotational displacement of the work W is mainly controlled and correctingly controlled via the means 13. In the correction control, fine control angles are selected in accordance with the deviation D detected by the means 23 from the group of angles including at least two inner correction angles, at least one outer correction angle and 0 degrees, and the rotational displacement of the work W is finely controlled in accordance with the fine control angles based on the main control angles regulated by the main control. COPYRIGHT: (C)2005,JPO&NCIPI
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