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September 2016
Alexander Zabirov
Investigation of Droplet Formation and Transfer in GMA Welding
The goal of this work is the attainment of new knowledge about the GMA welding process in relation to the physical phenomena of the droplet formation, detachment and its transfer. For this, the effect of different welding process parameters on these physical phenomena is studied. Finally, it is studied how the droplet detachment and droplet transfer can be controlled by these process parameters. These studies are performed with the help of modern theoretical and experimental methods. The obtained results can be used not only for a better understanding of the welding process, but also for helping to apply in the industry, for example, low-spatter, more stable and energy-saving welding processes.
One of the most important physical phenomena in GMA welding include the droplet formation and its transfer to the weld pool. The process stability, the weld seam geometry, the chemical composition and mechanical properties of weld seam, as well as the safety of welding construction depend on these processes. Therefore, the mentioned phenomena are very important for the quality and profitability of the welding process. The droplet transfer serves the GMA welding as an energy and mass transporter between the welding power source and electrode and the weld pool. With it, the GMA welding process can be purposefully controlled, even though the physical phenomena are in a complex interaction with each another.
One of the most important physical phenomena in GMA welding include the droplet formation and its transfer to the weld pool. The process stability, the weld seam geometry, the chemical composition and mechanical properties of weld seam, as well as the safety of welding construction depend on these processes. Therefore, the mentioned phenomena are very important for the quality and profitability of the welding process. The droplet transfer serves the GMA welding as an energy and mass transporter between the welding power source and electrode and the weld pool. With it, the GMA welding process can be purposefully controlled, even though the physical phenomena are in a complex interaction with each another.
Schlagwörter: GMA Welding; Metal transfer; Simulation; Experiment
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DOI 10.2370/9783844047431
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