APPARATUS FOR CONTROLLING PROCESS OF GAS-SHIELD ARC WELDING BY NON-CONSUMABLE ELECTRODE Russian patent published in 1997 - IPC

FIELD: welding equipment, namely automatic control of electric current mode at gas shield electric arc welding in modes of pulsating arc current. SUBSTANCE: power inputs of source for heating up addition wire are connected with supply industrial mains. First power output terminal is connected with article, second - trough shunt with current collector of welding apparatus. measuring output of shunt is connected with input of matching converter of current signal. Output of said converter is connected with input of unit for switching analog signals. Outputs of unit of digital-to-analog converter are connected with input of electric drive for feeding addition wire and with control input of heating up source. inputs of matching converter of voltage signal are connected with article and current collector; its output is connected with input of said unit for switching analog signals. EFFECT: improved design, enhanced accuracy of controlling process. 1 tbl, 9 dwg