Welding Mechanisation at L and T

Abstract

Consistent quality of weld joint can be achieved when welding arc is properly directed at the j o int. It is difficult to achieve accurate fit-up and straightness of any weld joint in heavy structural fabrication. Further, heat of the welding arc causes distortion of the joint. Hence, mechanised welding processes would still require constant monitoring by the operator. To derive the maximum benefits of welding mechanisation, manual intervention should be kept to a minimum. This is achieved by the use of Seam Trackers.

Weaving of the welding arc reduces the number of passes required to weld a groove joint. Weaving also helps in avoiding lack of side wall fusion in narrow groove joints. Narrow groove joint reduces weld metal requirement. Hence, arc oscillation can improve productivity and quality. Weld arc oscillation (weaving) can be achieved by the use of Magnetic Arc Oscillators.

Larsen &. Toubros Bangalore - works, use both Seam Tracker and Magnetic Arc Oscillator to improve productivity and weld quality.