Patent ID: 6723956
Filing Date: 2004-04-20
Classification: B23K

Abstract:
Process for the arc welding in pulsed mode of one or more workpieces made of carbon steel, stainless steel, aluminum or aluminum alloy, with the use of a gas shield, in which an electric arc welding torch is supplied with at least one consumable wire at a wire feed speed (Vwire) and the consumable wire is subjected to current pulses, in order to melt the end of the consumable wire and to detach a drop of molten metal by a current impulse, and in which, for a given pulse frequency, a wire feed speed (Vwire), a mean current (Imean) value and an rms current (Irms) value such that:Imean=A1Vwire+B1, where 51<45 and 01<50 andIrms=A2Vwire+B2, where 52<45 and 402<100, where Imean and Irms are expressed in amps and Vwire is expressed in m/min, are chosen, and wherein:the wire feed speed (Vwire) is between 1 and 20 m/min; the pulse frequency is between 20 and 300 Hz; and the ratio (Irms/Imean) of the rms current Irms) value to the mean current Imean) value is between 1.05 and 2.