In this work, a pulsed welding process is investigated to highlight how a time-varying profile of current impacts the metal transfer dynamics. First, the process is recorded using a high-speed camera, allowing us to qualitatively evaluate the effectiveness of metal transfer and the synchronization of droplet detachment with current peaks. Second, a time-dependent axisymmetric 2D model is developed to take into account both the droplet detachment using a volume-of-fluid model and the production and diffusion of metal vapour through a simplified diffusion model (neglecting demixing effects). We report a comparison between experimental and simulative results of a pulsed transfer mode for a steel wire (=1mm) and Ar shielding gas.

M Boselli, V Colombo, E Ghedini, M Gherardi, P Sanibondi (2012). Dynamic analysis of droplet transfer in gas–metal arc welding: modelling and experiments. PLASMA SOURCES SCIENCE & TECHNOLOGY, 21(5), 1-6 [10.1088/0963-0252/21/5/055015].

Dynamic analysis of droplet transfer in gas–metal arc welding: modelling and experiments

BOSELLI, MARCO;COLOMBO, VITTORIO;GHEDINI, EMANUELE;GHERARDI, MATTEO;SANIBONDI, PAOLO
2012

Abstract

In this work, a pulsed welding process is investigated to highlight how a time-varying profile of current impacts the metal transfer dynamics. First, the process is recorded using a high-speed camera, allowing us to qualitatively evaluate the effectiveness of metal transfer and the synchronization of droplet detachment with current peaks. Second, a time-dependent axisymmetric 2D model is developed to take into account both the droplet detachment using a volume-of-fluid model and the production and diffusion of metal vapour through a simplified diffusion model (neglecting demixing effects). We report a comparison between experimental and simulative results of a pulsed transfer mode for a steel wire (=1mm) and Ar shielding gas.
2012
M Boselli, V Colombo, E Ghedini, M Gherardi, P Sanibondi (2012). Dynamic analysis of droplet transfer in gas–metal arc welding: modelling and experiments. PLASMA SOURCES SCIENCE & TECHNOLOGY, 21(5), 1-6 [10.1088/0963-0252/21/5/055015].
M Boselli; V Colombo; E Ghedini; M Gherardi; P Sanibondi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/126872
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