In this work, a pulsed welding process has been investigated to highlight how a time varying profile of current impacts on the metal transfer dynamics. First, the process has been recorded using high-speed camera, allowing to qualitatively evaluate the effectiveness of metal transfer and the synchronization of the droplet detachment with current peaks. Second, a time-dependent axi-symmetric 2-D model has been developed in the FLUENT environment to take into account both the droplet detachment using a volume of fluid (VoF) 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 (d = 1 mm) and an Ar shielding gas.

M. Boselli, V. Colombo, E. Ghedini, P. Sanibondi (2011). Dynamic analysis of metal transfer in GMAW: modeling and experiments. PHILADELPHIA : s.n..

Dynamic analysis of metal transfer in GMAW: modeling and experiments

BOSELLI, MARCO;COLOMBO, VITTORIO;GHEDINI, EMANUELE;SANIBONDI, PAOLO
2011

Abstract

In this work, a pulsed welding process has been investigated to highlight how a time varying profile of current impacts on the metal transfer dynamics. First, the process has been recorded using high-speed camera, allowing to qualitatively evaluate the effectiveness of metal transfer and the synchronization of the droplet detachment with current peaks. Second, a time-dependent axi-symmetric 2-D model has been developed in the FLUENT environment to take into account both the droplet detachment using a volume of fluid (VoF) 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 (d = 1 mm) and an Ar shielding gas.
2011
Proceedings of the International Symposium on Plasma Chemistry 20
1
4
M. Boselli, V. Colombo, E. Ghedini, P. Sanibondi (2011). Dynamic analysis of metal transfer in GMAW: modeling and experiments. PHILADELPHIA : s.n..
M. Boselli; V. Colombo; E. Ghedini; P. Sanibondi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/105818
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