| 摘要 |
PURPOSE:To make a relative speed of welding constant, and to equalize the quality of a weld zone by bringing a torch to a copying horizontal movement at a constant speed, as for a weld linear part of a structure, and moving the torch in a circular arc shape upward and downward, and to the right and left as the structure rotates, as for its circular arc-shaped part. CONSTITUTION:A linear part B1 of a weld zone B of a structure A is welded at a constant speed by a copying control of a robot C, for instance, by inclining a turning table 2 by 45 deg., as executing a vertical welding by a torch D. A circular arc-shaped weld zone B2 is welded vertically at a constant speed by rotating the turning table 2, and also bringing the torch D to a control movement upward and downward, and to the right and left. By this computer control, the whole periphery of the weld zone B is welded in the vertical direction at a constant speed, and the quality of a multilayer buildup welding is equalized.
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