| 摘要 |
PURPOSE:To copy automatically a weld line and to subject a square part to corner welding by determining the projecting length, etc. of a consumable electrode from a tip and enabling control of the oscillating angle of a torch and detection of the fillet weld square part. CONSTITUTION:The average welding current IA, effective welding current IE and the fed speed (v) of a consumable electrode in arc welding to be performed with a welding torch 1 under oscillation are detected. The detected currents and speed are calculated and the projecting length LE of the electrode 15 from a tip 11 is determined. The deviation between the oscillating center position of the torch 1 and the center position of a joint is detected from the relative difference in the length LE in the oscillating position at optional two points. The position of the torch 1 is always controlled to maintain the preset relation in the relative positions between both centers so that the arc point to copy automatically the weld line. The square part of an object 12 to be welded is detected from the change in the length L and the corner welding is automatically performed. |
