本文選題：激光光譜 + 激光焊接　； 參考：《上海交通大學(xué)學(xué)報》2015年03期

【摘要】：首先從激光焊接鋁合金薄板的激光光譜入手,發(fā)現(xiàn)波長為600~650nm激光的光強(qiáng)幾乎不變,選擇了合適的窄帶寬濾光片,使得CCD相機(jī)采集的整個焊接過程圖片光強(qiáng)均一,整個過程不受焊接過程中激光光強(qiáng)的影響.然后在最佳的焊接參數(shù)下焊接,用2臺CCD相機(jī)在脈沖信號下同時進(jìn)行圖像采集,通過匹配計算分析得到板件在整個焊接過程中全場三維變形量、形貌和應(yīng)變,能夠?qū)崟r地再現(xiàn)變形過程,得到任意時刻的三維上的焊接變形量以及該時刻的形貌及應(yīng)變.
[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.
【作者單位】： 天津大學(xué)材料科學(xué)與工程學(xué)院天津市現(xiàn)代連接技術(shù)重點實驗室;
【基金】：國家自然科學(xué)基金項目(5097197,51275342)資助
【分類號】：TG404;TG456.7

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