Keyhole formation and collapse in plasma arc welding
Keyhole formation and collapse in plasma arc welding
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DOI：
10.1088/0022-3727/32/22/312
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发表时间：
1999-11
期刊：
影响因子：
--
通讯作者：
H. Fan;R. Kovacevic
中科院分区：
文献类型：
--
作者：
H. Fan;R. Kovacevic
建立了稳态锁孔等离子弧焊传热和流体流动的数学模型。采用流体体积法，对熔池内的加热、熔化、塌陷及后续凝固过程进行了动态研究。将预测结果与实验焊缝和锁孔形状进行了比较。利用激光频闪（LaserStrobe）视频系统，采集焊缝熔池上表面的图像，对预测的焊缝熔池瞬态发展进行验证。结果表明，理论预测与实验结果吻合较好。
A mathematical model is developed to describe the heat transfer and fluid flow in stationary keyhole plasma arc welding. Using the volume of fluid method, the processes of heating, melting, collapsing and subsequent solidifying in the molten pool are dynamically studied. The predicted results have been compared with the experimental weld and keyhole shape. Using the LaserStrobe video system, the captured images of the upper surface of the weld pool are used to verify the predicted transient development of the weld pool. It is indicated that theoretical predictions and the experimental results are in close agreement.