Patent ID: 8389900
Filing Date: 2013-03-05
Classification: B23K

Abstract:
1. A method for removing slag from an end of a consuming welding wire for welding a workpiece, comprising: moving the welding wire towards the workpiece by a wire feeder during a welding process, with an electric arc burning between the welding wire and the workpiece, starting and performing a slag-removing process from the end of the welding wire, reducing a welding current to a selected minimum value as soon as the slag-removing process is started, cyclically moving the welding wire towards the workpiece by a predetermined path length in a recurrent forward and backward movement during the slag-removing process, and moving the welding wire again away from the workpiece by a selected path length shorter than the predetermined path length until short-circuit detection between the welding wire and the workpiece by a short-circuit monitoring unit for terminating the slag-removing process.