| 摘要 |
PROBLEM TO BE SOLVED: To provide an automatic fillet welding method, in which bead shapes of corner-winding welding at a terminal end are not dispersive and welding quality is stable. SOLUTION: Straight torches 9a, 9b are moved to a welding beginning end 12, and the side of the beginning end is sensed to correct a welding line (Step S1). After sensing of the side of the beginning end is finished, an arc is ignited, and corner-winding welding at the side of the beginning end is conducted (Step S2). Following the corner-winding welding at the side of the beginning end, normal welding is conducted (Step S3). The normal welding is temporarily stopped before a terminal end 13, the arc is cut, and the position is memorized (Step S4). The straight torches 9a, 9b are moved to the terminal end 13, and the side of the terminal end is sensed by welding wires of the front ends of the torches to correct the welding line (Step S5). Then, the arc is ignited again at the terminal end 13 to conduct terminal end corner-winding welding, normal welding is conducted till the positions 14, 15 before the terminal end, where the arc is cut in normal welding, and the bead is connected to the end of the former bead (Step S6). COPYRIGHT: (C)2006,JPO&NCIPI
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