Proceedings of the KWS Conference (대한용접접합학회:학술대회논문집)

The Korean Welding and Joining Society (대한용접접합학회)
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A Study on the Arc Characteristics in Butt Joint P-GMA Welding with Acute Groove Angles

작은 그루브 각을 가지는 맞대기 P-GMA 용접에서의 용접아크에 관한 연구

  • Kim, Ryoon-Han (Production Engineering Center, LS Cable Ltd) ;
  • Na, Suck-Joo (Department of Mechanical Engineering, KAIST) ;
  • Kim, Cheol-Hee (Advanced Welding & Joining Technology Research Team, Korea Institute of Industrial Technology)
  • 김륜한 (LS전선 생산기술센터, KAIST 기계공학과) ;
  • 나석주 (KAIST 기계공학과) ;
  • 김철희 (생산기술연구원 용접.접합연구부)
  • Published : 2010.05.13
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Abstract

The purpose of this paper is to propose a mathematical model of welding current for the P-GMAW by modifying the well known GMAW model. Welding power circuit is simply modeled as a RL electric circuit and solved as an ODE equation. The welding current depends on the joint shape, molten pool and welding parameters. To compare the molten pool effect to the welding current, CFD numerical simulation technique was adopted. Welding experiment is also conducted with the same welding parameters as used in numerical simulations to verify the proposed welding current model. The current model which is considered molten pool shape, is more fit to experiment result.

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