• Journal of the Korean Society for Precision Engineering
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• v.25 no.9
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• pp.27-31
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• 2008

• Proceedings of the KWS Conference
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• 2001.05a
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• pp.36-39
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• 2001

• Proceedings of the KWS Conference
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• 2001.10a
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• pp.45-48
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• 2001

• Proceedings of the KWS Conference
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• 2004.05a
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• pp.188-190
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• 2004

가스메탈아크용접(gas metal arc welding, 이하 'GMA용접' 이라고 함)은 용가재로서 소모전극 와이어를 일정한 속도로 용융지에 공급하면서 와이어 선단과 모재 사이에서 전기적 아크가 발생되도록 하는 용접법이다. (중략)

• Proceedings of the KWS Conference
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• 1993.05a
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• pp.32-35
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• 1993

• Journal of Welding and Joining
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• v.21 no.7
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• pp.9-17
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• 2003

• Journal of Welding and Joining
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• v.17 no.5
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• pp.29-35
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• 1999

• Proceedings of the KWS Conference
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• 1999.10a
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• pp.132-135
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• 1999

• Journal of the Korean Society for Precision Engineering
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• v.15 no.4
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• pp.148-155
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• 1998

It is commonly known that, in GMAW, the characteristics of metal transfer and the size of molten drop are highly dependent on the welding current. These changes in the characteristics of metal transfer has a considerable effect on the weld quality, and a lot of studies have been made on metal transfer modes for that reason. In this study, two cases were investigated; the one in which the metal transfer proceeds with gravitational force, surface tension, and no electromagnetic force, and the other in which the process has electromagnetic term in addition, where the current density in the fluid has been assumed to have Gaussian distribution on any given cross-section and it acts vertically. Using fluid flow analysis, this study has observed the whole process of the development and break-up of the molten drop, and it also showed that transitional processes, drop rate, and the drop size in each metal transfer mode can be estimated.

• Proceedings of the KSME Conference
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• 2003.11a
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• pp.1741-1746
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• 2003

Effects of electromagnetic force which is one of the most important factor of metal transfer that affects bead geometry and microstructure of weld metal in GMAW(gas metal arc welding). In this paper, different ways of external electromagnetic forces were applied on GMAW process and their effects on the welding were studied. On certain conditions, better bead geometry, better influence on the arc and metal transfer mode and higher welding efficiency could be obtained. Experimental methods and their results will be presented.