铝合金激光焊接变形测量

发布时间：2018-06-16 17:25

本文选题：激光光谱 + 激光焊接　；参考：《上海交通大学学报》2015年03期

【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600~650nm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.
[Abstract]:Starting with the laser spectrum of aluminum alloy sheet welded by laser, it is found that the light intensity of 600~650nm laser is almost invariable, and a suitable narrow band filter is selected, which makes the image of welding process collected by CCD camera uniform. The whole process is not affected by the laser intensity during the welding process. Then, under the best welding parameters, two CCD cameras are used to collect the image simultaneously under the pulse signal, and the 3D deformation, morphology and strain of the plate during the whole welding process are obtained by matching calculation and analysis. The deformation process can be reproduced in real time, and the welding deformation at any moment, the shape and strain of the moment can be obtained.
【作者单位】：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;
【基金】：国家自然科学基金项目(5097197,51275342)资助
【分类号】：TG404;TG456.7

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