上海交通大学学报(自然版) ›› 2015, Vol. 49 ›› Issue (03): 326-328.

• 金属学与金属工艺 • 上一篇    下一篇

铝合金激光焊接变形测量

黄尊月,罗震,张禹,姚杞   

  1. (天津大学 材料科学与工程学院 天津市现代连接技术重点实验室,天津 300072)
  • 收稿日期:2014-07-03 出版日期:2015-03-30 发布日期:2015-03-30
  • 基金资助:

    国家自然科学基金项目(5097197,51275342)资助

Aluminum Sheet Laser Welding Deformation Measurements

HUANG Zunyue,LUO Zhen,ZHANG Yu,YAO Qi   

  1. (School of Materials Science and Engineering, Tianjin Key Laboratory of Advanced Joining Technology, Tianjin University, Tianjin 300072, China)
  • Received:2014-07-03 Online:2015-03-30 Published:2015-03-30

摘要:

摘要:  首先从激光焊接铝合金薄板的激光光谱入手,发现波长为600~650 nm激光的光强几乎不变,选择了合适的窄带宽滤光片,使得CCD相机采集的整个焊接过程图片光强均一,整个过程不受焊接过程中激光光强的影响.然后在最佳的焊接参数下焊接,用2台CCD相机在脉冲信号下同时进行图像采集,通过匹配计算分析得到板件在整个焊接过程中全场三维变形量、形貌和应变,能够实时地再现变形过程,得到任意时刻的三维上的焊接变形量以及该时刻的形貌及应变.

关键词: 激光光谱, 激光焊接, 铝合金, 焊接变形

Abstract:

Abstract: This paper reveals that the intensity of the light emitted by aluminum sheet laser welding, which possess a wavelength of 600 nm to 650 nm is nearly constant. A suitable narrow bandwidth filter was selected to prevent the fluctuation of the light, so that the pictures taken by the CCD camera have a coherent intensity. The images taken by two independent CCD cameras driven by pulsing signal simultaneously could reveal the threedimensional deformation, morphology and strain of the entire plate which were welded in the optimal welding parameters in real time. This procedure could help study the sheet laser welding deformation clearly, which was significant in the field of control welding distortion.

Key words:  , laser spectroscopy; laser welding; aluminum alloy; welding deformation

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