Abstract
To evaluate the effect of the short-time arc breaks along the side-walls of grove during multi-pass welding virtual study of this effect is performed using deterministic mathematical model of arc welding process. It is established that breaks in arc burning lead to the appearance of craters, which may not be remelted during the subsequent pass. It is shown that the effect of the duration of the arc breaks on the craters depth increases with increase in the amplitude and period of oscillations. The effect of breaks is more noticeable if they occur when approaching the groove face than if they occur when moving from the groove face to the center of the pass. When analyzing the welding monitoring data, it is necessary to take into account not only the arc power, but also the parameters of transverse oscillations of the torch, including the phase of arc breaks relative to these oscillations.
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