Droplet formation,detachment, and impingement on the molten pool in gas metal arc welding |
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Authors: | H G Fan R Kovacevic |
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Affiliation: | (1) the Department of Mechanical Engineering, Southern Methodist University, 75275 Dallas, TX |
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Abstract: | A mathematical model is developed to describe the globular transfer in gas metal arc welding (GMAW). This work is both theoretical
and experimental. Using the volume-of-fluid (VOF) method, the fluid-flow and heat-transfer phenomena are dynamically studied
during the following processes: droplet formation and detachment, impingement of a droplet on a solid substrate, impingement
of multiple droplets on the molten pool, and solidification after the arc extinguishes. A He-Ne laser, in conjunction with
the shadow graphing technique, is used to observe the metal transfer processes. Theoretical predictions and experimental results
are in close agreement, suggesting that the theoretical treatment of the model is good. |
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Keywords: | |
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