计算物理 ›› 1997, Vol. 14 ›› Issue (3): 320-324.

• 论文 • 上一篇    下一篇

激光匙孔焊接过程两维传热数值计算

张靖周, 徐九华   

  1. 南京航空航天大学, 210016
  • 收稿日期:1996-05-23 修回日期:1997-01-06 出版日期:1997-05-25 发布日期:1997-05-25
  • 基金资助:
    国家自然科学基金

NUMERICAL SIMULATION OF TWO DIMENSIONAL HEAT TRANSFER ON THE KEYHOLE LASER WELDING PROCESS

Zhang Jingzhou, Xu Jiuhua   

  1. Nanjing University of Aeronautics & Astronautics, Nanjing 210016
  • Received:1996-05-23 Revised:1997-01-06 Online:1997-05-25 Published:1997-05-25

摘要: 对高能量密度激光匙孔焊接过程的二维准稳态传热进行了计算方法的研究。数学模型的建立以质量、动量和能量守恒为依据,数值计算在曲线坐标系上进行。提出了位置预测——修正技术,以便准确地捕捉焊接过程中固-液交界面的形状。并应用该计算方法对一典型的AISI304不锈钢板的匙孔焊接过程进行了算例验证。结果表明该计算方法是合理可行的。

关键词: 激光焊接, 数值计算, 相变现象, 传热, 曲线坐标系

Abstract: A numerical method is presented for the two dimensional quasi steady state heat transfer on high power density laser welding processes according to the keyhole model.The mathematic model is estabilished on the basis of the conservation of mass,momentum and energy.Computation has been performed in the curvilinear coordinate system by using the finite volume method.A position predict correct procedure was developed to accurately identify the solid liquid interface location during welding.Numerical example is on the study of a typical keyhold welding process of an AISI304 Stainless Steel plate.

Key words: Laser welding, numerical simulation, phase change phenomena, heat transfer, curvilinear coordinate system

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