AUTOMATIC MULTI-ELECTRODE GAS SHIELDED ARC WELDING DEVICE

摘要

An automatic multi-electrode gas shielded arc welding device that prevents the occurrence of a welding defect caused by an unstable molten pool and is suitable for automating gas shielded arc welding is characterized by comprising: a voltage detection means (18) for detecting the voltage between an intermediate electrode (5) and a material (1) to be welded; a short-circuit determination means (19) for receiving the voltage detected by the voltage detection means (18) and determining whether a short-circuit occurred; an intermediate electrode current setting means (20) for receiving a current value signal from the outside and for, when the short-circuit determination means (19) determines that a short-circuit occurred, outputting the current value signal indicating a first current value (I1) to an intermediate electrode DC power supply (M) as a current value setting signal and, when the short-circuit determination means (19) determines that a short-circuit did not occur, outputting the current value signal indicating a second current value (I2) smaller than the first current value (I1) to the intermediate electrode DC power supply (M) as the current value setting signal; a speed control means (32); and an electrode feeding means (27).