RESISTANCE SPOT WELDING METHOD WHICH CONTROLS WELDING CURRENT TO MINIMIZE THE EXPULSION OF NUGGET

摘要

PURPOSE: A resistance spot welding method is provided to minimize welding defects by stably controlling heat input to a welded portion.;CONSTITUTION: A resistance spot welding method comprises the steps of: setting and inputting a pressure applied to a welded panel and a target welding current output to the welded panel(S10), setting and inputting the waveform of input current(S20), starting the supply of input current for outputting the target welding current to execute welding(S30), measuring the actual welding current outputted to the welded panel according to the supply of input current(S40), and comparing the actual welding current with the target welding current and, if different, executing feedback control to make the actual welding current equal to the target welding current(S60).;COPYRIGHT KIPO 2012