펄스 GMA 위빙 용접에서 그루브형상에 따른 아크특성에 관한 연구

Abstract

In this paper, arc characteristics of V groove joints using pulsed GMA welding were found out. The bevel angles of 22.5˚ and 30.0˚ were chose to make the V groove configuration with the groove angles of 45˚ and 60.0˚, respectively. In the experiment, the arc current waveform measurement and the high speed photography were taken to investigate the arc characteristics for a single-beveled asymmetric workpiece. Consequently, the welding current was changed abnormally around the edge of groove. As the arc moved close to the groove face, the welding current was increased rapidly because the welding arc was affected by the inclined surface. Also the welding current waveforms were measured for the double-sided symmetric workpiece to verify the previous measurements for the single-beveled workpiece, and similar current waveforms were found.