Investigation on arc light intensity in gas metal arc welding. Part 1: Relationship between arc light intensity and arc length

Abstract

The arc length has been detected through the arc because the welding current and voltage vary linearly with the arc length. In this work, the relationship between the arc light intensity and arc length is investigated through analytic modelling. The arc light intensity is derived as a function of the arc length and welding current using the heat balance in the plasma. Experiments are carried out to verify the proposed model and to find out the effects of welding conditions on the arc light intensity in gas metal arc welding (GMAW). The arc light intensity varies proportionally to the arc length and signal quality is enhanced with a fast weaving speed. The predicted results of the arc light intensity show reasonably good agreement with the experimental data.

Determination of GTA and GMA welding arc temperatures

“…Consequently,there arises a need to investigate the work of the arc during GTA and GMA processing. Models of the welding arc are being constructed with a view to gaining a better insight into the occurring phenomena [1][2][3][4][5] including arc temperature since this is the parameter which influences all of the changes taking place. 6 Investigations into the welding arc temperature lead to a better understanding of its working, The temperature of the welding arc varies from 5 000 to 30 000 K depending on the welding parameters and the type of shielding gas.…”