Patent ID: 6630646
Filing Date: 2003-10-07
Classification: B23K

Abstract:
A method for reducing the adherence of the welding wire to the contact nozzle at the intentional termination of gas metal arc welding with a power source of the inverter type, wherein immediately before the welding current is shut off during intentional termination of the welding operation, the control unit for the welding current in the power source is caused to fade the said welding current over a period of time of between 0.5 and 100 milliseconds so that the power development in the current transition between the welding wire and the contact nozzle is so low that the molten mass which has formed between the welding wire and the contact nozzle is so small that when the molten mass has set when the current is shut off, the molten mass is not able to hold the wire fast against the pushing force on the welding wire from a feeder as the welding wire is coming to a stop.