The effect of increased pressure on MIG welding arc has been investigated, using automatic robotic welding machine and a mixture of Argon and Carbon Dioxide as shielding gas. The variation of welding parameters like feed rate, arc voltage and arc current were observed on penetration. Variation of penetration with pressure at different wire feed speeds has also been studied. It has been observed that increased pressure has remarkable effect on the welding arc, weld penetration and bead geometry.
MIG Welding, Arc Voltage, Arc Current, Pressure
