Journal of Welding and Joining

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

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

  • Kim, Ryoon-Han (Facility Technology Group, 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 설비기술그룹) ;
  • 나석주 (한국과학기술원 기계공학과) ;
  • 김철희 (한국생산기술연구원 용접접합연구부)
  • Received : 2010.03.24
  • Accepted : 2010.05.07
  • Published : 2010.08.31
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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.

Keywords

References

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