| Analysis of keyhole geometry in plasma arc welding |
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| 作者姓名： | 胡庆贤 武传松 |
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| 作者单位： | Institute for Materials Joining, Shandong University, Jinan, 250061 |
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| 摘 要： | The key problem for numerical simulation of plasma arc welding （PAW） process is to develop a suitable and adaptive volumetric heat source mode which reflects the physical characteristics of keyhole PAW. To this end, the keyhole geometry under different PAW process conditions must be predicted. In this paper, a mathematical model for determining the keyhole shape is developed with considering the mass and momentum conservation of the in-keyhole plasma jet as well as the pressure equilibrium at the plasma jet/liquid metal boundary. A suitable heat source model related to the keyhole shape is applied to the calculation of PAW weld dimensions. The predicted results are in good agreement with the experimental ones.
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| 关 键 词： | 等离子弧焊 小孔 几何结构 数值分析 |
Analysis of keyhole geometry in plasma arc welding |
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| Hu Qingxian,Wu Chuansong.Analysis of keyhole geometry in plasma arc welding[J].China Welding,2006,15(4):43-45. |
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| Authors: | Hu Qingxian Wu Chuansong |
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| Abstract: | The key problem for numerical simulation of plasma arc welding(PAW)process is to develop a suitable and adaptive volumetric heat source mode which reflects the physical characteristics of keyhole PAW.To this end,the keyhole geometry under different PAW process conditions must be predicted.In this paper,a mathematical model for determining the keyhole shape is developed with considering the mass and momentum conservation of the in-keyhole plasma jet as well as the pressure equilibrium at the plasma jet/liquid metal boundary.A suitable heat source model related to the keyhole shape is applied to the calculation of PAW weld dimensions.The predicted results are in good agreement with the experimental ones. |
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| Keywords: | keyhole geometry plasma arc welding numerical analysis |
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