Journal of Welding and Joining

The Korean Welding and Joining Society (대한용접접합학회)
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Heat Source Modeling of GMAW Considering Metal Transfer

용적이행을 고려한 GMA 용접의 열원 모델링

  • 정기남 (한국과학기술원 기계공학과) ;
  • 이지혜 (한국과학기술원 기계공학과) ;
  • 이재영 (한국과학기술원 기계공학과) ;
  • 유중돈 (한국과학기술원 기계공학과)
  • Published : 2004.04.01
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Abstract

The Gaussian heat source has been widely used to simulate the heat flux of the welding we, and applied to calculating the temperature distribution of a workpiece. The conventional two-dimensional Gaussian heat source for the GMAW is modified in this work by decomposing the arc heat into heats of the cathode and metal transfer. The efficiency and effective arc radius of each heat source are determined analytically for the free-flight mode such as the globular and spray modes. The temperature distribution and weld geometry are calculated using the finite element method, and distribution of the drop heat is found to have significant effects on the penetration. The predicted results show good agreements with the available experimental results, especially with the penetration.

Keywords

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