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

Arif, Nabeel; Lee, SeungH.; Kang, MoonJ.; Yoo, ChoongD.

Journal of KWJS 2008;26(4):61-65.
Published online September 24, 2008.

용적 내부의 유동에 의한 모멘텀을 고려한 GMA 용접의 입상용적 이행에 대한 해석

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

Nabeel Arif, SeungH. Lee, MoonJ. Kang, ChoongD. Yoo

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.

Key Words: Globular transfer mode, Momentum, Flow, MFBM(Modified Force Balance Model)