Avaliação da influência da vazão de gás de proteção e da inclinação da tocha na eficiência térmica do processo de soldagem TIG

Abstract

The objectives of the present work are the analysis of the influence of the shielding gas flow and inclination of the welding torch on the thermal efficiency of the TIG welding process. Different shielding gas flow rates and the inclination of the torch were used, keeping the voltage and current (power) parameters constant. Three different values of gas flow, 5 l/min, 8 l/min and 10 l/min, were used with torch in vertical position and inclinations at -30° and +30°. It was observed that, for torch in vertical position the best average value of thermal efficiency of 69.22% was reached with the lowest shielding gas flow rate of 5 l / min and that, for this same gas flow, the best average value of thermal efficiency, of 70.66%, was reached in slope of -30º, by the pulling technique.