Patent ID: 6388233
Filing Date: 2002-05-14
Classification: B23K

Abstract:
A method for pulsed gas metal-arc welding with an electrode fed to the welding site continuously at a given rate, comprising the steps of regulating fusion power such that the fusion conditions are adapted in such a manner that the material transfer from the electrode to the workpiece takes place essentially without short-circuiting drops by the welding current being periodically increased to a pulse current of such size and duration that the current density in the electrode causes sufficient electromagnetic forces in order to separate one drop for each pulse, and stabilizing the arc length by regulating the power supply for the arc, by means of an arc length regulator, mainly on the basis of a measured arc voltage, wherein short-circuiting of the arc is detected as arc-voltage decreases and current increases, and detecting each short-circuit, and adjusting the arc length regulator to thereby increase the fusion power over an existing fusion power upon each short-circuit being detected.