Spatial analysis of the back reflected laser light during CO2-laser cutting of metal sheets
Spatial analysis of the back reflected laser light during CO2-laser cutting of metal sheets
复制标题
CO2 激光切割金属板材时背反射激光的空间分析
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
T. Graf
中科院分区：
文献类型：
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作者：
David Schindhelm;R. Weber;T. Graf
在激光焊接或切割等激光材料加工过程中，众所周知，整个激光能量不仅被相互作用区吸收或传递，而且有相当大比例的激光也被反射回激光光源。一些文献对激光焊接过程的分析表明，反射激光功率与焊接结果之间存在明显的相关性。分析了高功率CO2激光切割金属板材过程中背向反射激光的信息量。为此，在高时间分辨率的激光切割过程中，通过刮刀镜在线检测激光反射。对于不同的材料(软钢、不锈钢、铝)和厚度(1和3 mm)，将对激光从哪里反射(切割面或工件表面)进行详细的空间分析。对激光反射光的空间分析表明，仅有10%的激光从切割前沿反射。麦族..。
During laser material processing such as laser welding or cutting, it is known that the whole laser power is not only absorbed in or transmitted through the interaction zone, but a significant percentage is also reflected back to the laser source. Some publications analyzing the laser welding process showed a clear correlation between the reflected laser power and the result of the process. In this report, the authors analyze the information content of back reflected laser light during the high-power CO2-laser cutting of metal sheets. For this purpose, laser reflections are detected coaxially via a scraper-mirror online during laser cutting with a high time resolution. For different materials (mild steel, stainless steel, aluminum) and thicknesses (1 and 3 mm), a detailed spatial analysis on where the laser beam is reflected from (cutting front or workpiece surface) will be given. The spatial analysis of the reflected laser light shows that only 10% is reflected from the cutting front in the kerf. The mai...