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http://dx.doi.org/10.5781/KWJS.2008.26.4.061

Analysis of Globular Transfer Considering Momentum Induced by Flow Within Molten Drop in GMAW  

Arif, Nabeel (Dept. of Mech. Eng., KAIST)
Lee, Seung-H. (Dept. of Mech. Eng., KAIST)
Kang, Moon-J. (Advanced Welding & Joining Team, KITECH)
Yoo, Choong-D. (Dept. of Mech. Eng., KAIST)
Publication Information
Journal of Welding and Joining / v.26, no.4, 2008 , pp. 61-65 More about this Journal
Abstract
The static force balance model (SFBM) has been used to analyze drop transfer in gas metal arc welding. Although the SFBM is capable of predicting the detaching drop size in the globular mode with reasonable accuracy, discrepancy between the calculated and experimental results increases with current. In order to reduce discrepancy, the SFBM is modified by considering the momentum of the molten metal flow, which is generated by the pinch pressure. The momentum increases with smaller drop size and becomes compatible to the electromagnetic force. The modified force balance model (MFBM) predicts the experimental results more accurately, and extends its application to the projected mode.
Keywords
Globular transfer mode; Momentum; Flow; MFBM(Modified Force Balance Model);
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