THE STUDY OF VELOCITY TO FEED ELECTRODE (ARC LENGTH CONTROL) FOR ARC WELDING IN STRAIGHT BEAD, CORNER JOINT AND T-JOINT FLAT POSITION

Abstract

This research aimed to study of velocity to feed electrode through melting pool (arc length control) for Arc Welding in 1) straight bead 2) corner joint and 3) T-joint flat position. The target for experiment is the teacher of Welding Department in Phetchabun Technical College, 4 persons and students of Welding Department in Phetchabun Technical College who participated in skills of welding for the Northern Skill Competition, 4 persons. Weld on steel size 6 x 50 x 150 mm. with Arc Welding Process by used to E 6013 electrode 2.6 mm., Follow Job sheet in stringers bead welding, corner joint and t-joint in flat position. And record of time to suitable feed electrode (arc length control).

        The found that 1) velocity to feed electrode through melting pool (arc length control) for Arc Welding in straight bead is suitable in 3.88 millimeters per second,  2) velocity to feed electrode (arc length control) for Arc Welding in corner joint is suitable in 4.23 millimeters per second and, 3) velocity to feed electrode (arc length control) for Arc Welding in T-joint flat position is suitable in 5.10 millimeters per second.