Process and apparatus for producing an electric arc current and apparatus for stud welding

• Main Authors: SCHEFFLER, HEIKO GERHARD, SCHMIDT, WOLFGANG, SCHMITT, KLAUS GISBERT
• Format: Patent
• Language: English; French; German
• Published: 23.05.2007
• Subjects: CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; SOLDERING OR UNSOLDERING; TRANSPORTING; WELDING; WORKING BY LASER BEAM

A method for producing an electric arc current (I s) for short period arc welding of bolts to a workpiece involves: (a) feeding a supply DC potential to an AC converter (30) with four controllable switching elements (S1)-(S4) arranged in an H-bridging circuit with two parallel longitudinal branches...