Arc welding device, process for welding sheet metal to metallic corresponding parts, and welding element

摘要

The welding machine (10) has a clamp (16) which holds the first metal sheet (12) at right-angles to the second sheet (14), and can move the first sheet toward or away from the second sheet. A dc current source (20) applies a positive voltage to the first sheet and a negative voltage to the second sheet. A magnetic field generator (30) has one or more coils (36,62) associated with C-shaped yokes (40,44) to create a magnetic circuit (52) with flux passing through the welding arc area (24). A second current source (58) generates the current through the coils (IM).