| 摘要 |
<p>This invention provides a weaving welding method using a welding robot which can weld suitably works having various thicknesses and various kinds of leg lengths using the same weaving pattern. A welding torch is woven in a transverse direction of a groove center line with the groove center (WC) acting as the center of rocking while the welding torch (1) is being moved in its axial direction so that the tip of a wire (3) having a substantially constant projecting length moves in parallel with the wall surface of a work (W). The direction of welding is corrected in accordance with the difference between welding currents (IL, IR) detected when the welding torch is in the left end position (TL) or the right end position (TR) in the direction of weaving or with the difference between the integrated values of the welding currents at the 1/4 period points of the right and left sides, respectively. Since molten metal(s) exists at the welding work position, the effective wire projecting length at the center of the direction of weaving becomes shorter than that at both end portions of said direction and the welding current at the center becomes greater than those at both end portions. As a result, lack of penetration of the wire into the work at the center of the direction of weaving can be avoided and welding of various works can be made.</p> |
