Influence of fixture restraint distance on pulsed laser welding distortion of Hastelloy C-276 thin sheet

GUO Yu-quan; WU Dong-jiang; MA Guang-yi; YANG Yi-bin; TONG Yu; GUO Dong-ming

doi:10.3788/OPE.20122011.2465

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Influence of fixture restraint distance on pulsed laser welding distortion of Hastelloy C-276 thin sheet

Article | 更新时间：2020-08-12

- Influence of fixture restraint distance on pulsed laser welding distortion of Hastelloy C-276 thin sheet
- Optics and Precision Engineering Vol. 20, Issue 11, Pages: 2465-2471(2012)
- 作者机构：
  
  大连理工大学精密与特种加工教育部重点实验室, 辽宁大连 116024
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20122011.2465
  CLC： TG456.7
- Received：21 May 2012，
  
  Revised：02 July 2012，
  
  Published：10 November 2012
- 稿件说明：
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郭玉泉, 吴东江, 马广义, 杨义彬, 佟宇, 郭东明. 夹具拘束距离对Hastelloy C-276薄板脉冲激光焊接变形的影响[J]. 光学精密工程, 2012,20(11): 2465-2471

GUO Yu-quan, WU Dong-jiang, MA Guang-yi, YANG Yi-bin, TONG Yu, GUO Dong-ming. Influence of fixture restraint distance on pulsed laser welding distortion of Hastelloy C-276 thin sheet[J]. Editorial Office of Optics and Precision Engineering, 2012,20(11): 2465-2471
郭玉泉, 吴东江, 马广义, 杨义彬, 佟宇, 郭东明. 夹具拘束距离对Hastelloy C-276薄板脉冲激光焊接变形的影响[J]. 光学精密工程, 2012,20(11): 2465-2471 DOI： 10.3788/OPE.20122011.2465.

GUO Yu-quan, WU Dong-jiang, MA Guang-yi, YANG Yi-bin, TONG Yu, GUO Dong-ming. Influence of fixture restraint distance on pulsed laser welding distortion of Hastelloy C-276 thin sheet[J]. Editorial Office of Optics and Precision Engineering, 2012,20(11): 2465-2471 DOI： 10.3788/OPE.20122011.2465.

摘要

为了揭示夹具拘束距离对0.5 mm厚Hastelloy C-276薄板脉冲激光焊接变形的影响

基于有限元软件ANSYS建立了三维热力耦合有限元模型。采用位移约束假设代替实际夹具的拘束作用

研究了夹具拘束距离对Hastelloy C-276薄板焊接纵向挠曲变形及横向收缩变形的影响规律。实验测量了焊接热循环曲线和残余变形

验证了所建立有限元模型的可靠性。模拟结果表明

随着夹具拘束距离从8 mm增加到20 mm

焊接纵向挠曲变形及横向收缩变形均表现为近似线性增大的趋势

特别是焊接横向收缩变形增加了将近3.6倍

而减小夹具拘束距离可以控制焊接残余变形。该模型较准确地模拟了薄板脉冲激光焊接温度场及残余变形

为抑制薄板焊接变形提供了理论和实验依据。

Abstract

A three-dimensional thermal-mechanical Finite Element Model (FEM) was established by the ANSYS code to reveal the influence of fixture restraint distance on Pulsed Laser Welding (PLW) distortion of Hastelloy C-276 thin sheet with a thickness of 0.5 mm. The influence laws of the restraint distance on welding longitudinal deflection and transverse shrinkage distortion were investigated by using the displacement restriction assumption instead of the actual restraint condition. Experiments were carried out to measure the welding thermal cycle curves and residual distortions. The simulation results are in good agreement with that of the corresponding experiment

which validates the reliability of the FEM. It shows that the welding longitudinal deflection and transverse shrinkage distortion increase linearly with the restraint distance increasing from 8 mm to 20 mm

especially the welding transverse shrinkage distortion increases by nearly 3.6 times. Furthermore

the welding residual distortions can be controlled by reducing the restraint distance. Results dennonstrate that the FEM can simulate accurately the temperature field and the residual distortion of PLW and can provide theoretical and experimental basis for suppression of the welding distortion of thin sheets.

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