Abstract
A mathematical model for the behaviour and interaction of power source, electrode extension, welding arc, and welding joint geometry is applied to simulation of seam tracking signals from high speed rotating electrodes in gas metal arc welding of carbon steel. Sensor signals from a tilted electrode approaching internal and external fillet corners are analysed, as well as the frequency dependence of signal amplitude from a perpendicular electrode. The simulations are compared with experimental results from other references showing good agreement. The current signals are stronger than predicted from static arc characteristics, suggesting important dynamic effects in the behaviour of the electrode extension.
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