Numerical analysis of dynamic surface-deformation of fully-penetrated gas tungsten arc welding molten pool

被引：0
|
作者：
Zhao M. [1 ]
Qin Y. [1 ]
Sun Y. [1 ]
机构：
[1] College of Mechanical and Electronic Engineering, China University of Petroleum
来源：
Jixie Gongcheng Xuebao/Journal of Mechanical Engineering | 2010年 / 46卷 / 04期
关键词：
Lagrange parameter; Numerical analysis; Penetration control; Weld pool surface-deformation;
D O I：
10.3901/JME.2010.04.042
中图分类号：
学科分类号：
摘要：
Based on the principles of energy and mass conservation as well as energy minimization theory within a whole system of fully-penetrated gas tungsten arc welding (GTAW) molten pool, the governing equations are derived to describe the pool surface-deformation on both sides. The solution scheme for determining the Lagrange parameter is given for the coupled upper and bottom pool surface-deformation equations which are unified with a single Lagrange parameter. Through predicting and analyzing the dynamic variation processes of both upper and bottom pool surface-deformation during the period from the weld pool formation to its quasi-steady state for GTAW stainless steel and low carbon steel, the variables are extracted to characterize and judge the condition whether the workpiece is penetrated or not. It lays foundation for realizing welds penetration control based on front-side vision inspection. © 2010 Journal of Mechanical Engineering.
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页码：42 / 47
页数：5
相关论文
共 10 条
  • [1] Choo R.T.C., Szekely J., Westhoff R.C., Modeling of high-current arcs with emphasis on free surface phenomena in the weld pool, Welding Journal, 69, 9, pp. 346-361, (1990)
  • [2] Tsai M.C., Kou S., Electromagnetic-force-induce convection in weld pools with a free surface, Welding Journal, 69, 6, pp. 241-246, (1990)
  • [3] Ohji T., Nishiguchi K., Mathematical modeling of molten pool in arc welding of thin plate, (1983)
  • [4] Wu C.S., Dorn L., Prediction of surface depression of a tungsten inert gas weld pool in the full-penetration condition, Journal of Engineering Manufacture, 209, 2, pp. 221-226, (1995)
  • [5] Cao Z.N., Zhang Y.M., Kovacevic R., Numerical dynamic analysis of moving GTA weld pool, Journal of Manufacture Science and Engineering, 120, 2, pp. 173-178, (1998)
  • [6] Fan H.G., Tsai H.L., Na S.J., Heat transfer and fluid flow in a partially or fully penetrated weld pool in gas tungsten arc welding, International Journal of Heat and Mass Transfer, 44, 2, pp. 417-428, (2001)
  • [7] Zhao P.C., Wu C.S., Zhang Y.M., Modelling the transient behaviours of a fully penetrated gas-tungsten arc weld pool with surface deformation, Journal of Engineering Manufacture, 219, 1, pp. 99-110, (2005)
  • [8] Zhao M., Li R., Numerical analysis of dynamic variation of weld pool geometry in fully-penetrated TIG welding, China Welding, 17, 2, pp. 47-53, (2008)
  • [9] Wu C.S., Chen J., Zhang Y.M., Numerical analysis of both front- and back-side deformation of fully-penetrated GTAW weld pool surfaces, Computational Materials Science, 39, 3, pp. 635-642, (2007)
  • [10] Zhang Y.M., Beardsley M., Kovacevic R., Real- time image processing for 3D measurement of weld pool surface, Manufacturing Science and Engineering, 68, 1, pp. 255-262, (1994)
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