A feasibility study on high-power fiber laser cutting of thick CFRP laminates using single-pass strategy
A feasibility study on high-power fiber laser cutting of thick CFRP laminates using single-pass strategy
复制标题
采用单通道策略高功率光纤激光切割厚 CFRP 层压板的可行性研究
DOI：
10.1016/j.optlastec.2020.106889
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发表时间：
2021-01-21
影响因子：
5
通讯作者：
Yang, Xujing
中科院分区：
文献类型：
--
作者：
Li, Maojun;Chen, Limei;Yang, Xujing
高功率光纤激光器作为一种新兴的加工复合材料薄板（厚度小于5.0 mm）的技术已经发展起来，具有较高的加工效率，而利用光纤激光器切割CFRP厚板的工作报道非常有限。为了进一步探索光纤激光系统在不牺牲效率的情况下的切割能力，本工作对采用单道策略的高功率光纤激光切割CFRP厚层板进行了可行性研究。为了进一步了解激光- cfrp复合材料相互作用/去除机制，分析了表面形貌和截面特征。对各种热缺陷进行定性，以便更好地了解加工参数对加工质量的影响。结果表明：在激光切割过程中，较高的激光功率（4800 W）和切割速度（2000 mm/min）可以有效改善CFRP复合材料的表面质量和切割样品，而过高的激光能量主要是由于高水平的热应力导致CFRP复合材料出现严重的裂纹和分层。采用高功率光纤激光和单通策略可成功切割厚度为10.0 mm的CFRP复合材料，单位长度能量阈值约为270 J/mm。实验结果可以为进一步的工业应用提供重要的基准数据。
High-power fiber laser as an emerging technology has been developed for machining composite sheets (less than 5.0 mm thick) with relatively high efficiency, while very limited works are reported when using fiber laser to cut thick CFRP plates. In order to further explore the cutting capability of fiber laser system without sacrifice of efficiency, a feasibility study on high-power fiber laser cutting of thick CFRP laminates using single-pass strategy was carried out in this work. Surface morphology and cross-section characteristics were analyzed for further understanding laser-CFRP composite interaction/removal mechanisms. Various thermal defects were qualified to better understand the influence of processing parameters on machining quality. Results showed that relatively high level of laser power (4800 W) and cutting speed (2000 mm/min) were preferred to effectively improve surface quality and cut through samples during laser cutting process, while excessive laser energy damaged CFRP composites with severe cracks and delamination mainly due to high level of thermal stress. CFRP laminate with a thickness of 10.0 mm could be successfully cut through when using high-power fiber laser and single-pass strategy, the threshold of energy per unit length was about 270 J/mm. Experimental results from this work can provide significant benchmark data for further industrial applications.