The electromagnetic mechanism of the movement of the welding arc

Abstract

The electromagnetic mechanism of movement of the arc on the tip of the electrode is described. When the welding speed is increased as a result of decreasing the induction of the magnetic field, the speed of movement of the arc increases from the current supply and in the direction to the supply. This maintains the electromagnetic nature of welding and leads to undercutting. The experimental results are used to develop a method of regulating the movement of the arc using a composite electrode resulting in movement of the arc on the electrode tip in the longitudinal and transverse directions, an increase in the size of the active spot, decrease in arc pressure, and high-quality formation of the welded joint in one-sided high-speed welding on a flux cushion, irrespective of the size of the gap in the joint.