脉冲激光烧蚀CFRP材料工艺优化

Pulsed laser ablation CFRP material process optimization

为了研究20 W纳秒激光对碳纤维复合材料(CFRP)烧蚀的工艺质量,采用单因素实验方法及光切法进行了理论分析和实验验证,得到了扫描速率、峰值功率、离焦量对材料表面加工质量的影响规律,并对0.5 mm CFRP材料板进行了烧蚀实验。结果表明,调整激光器的离焦量,让激光的焦点与材料平面在同一高度,可使扫描线宽最小,减少了材料烧蚀的热影响区,提高了激光能量利用率;设定激光扫描速率为220 mm/s和峰值功率为10 W,可得到大小为3.50μm的CFRP最小表面粗糙度平均值,其中粗糙度数据稳定性样本方差最佳,约为0.133μm 2,在此条件下可得到良好的加工表现。此研究为脉冲激光加工CFRP材料工艺研究提供一定参考,并为脉冲激光加工复合材料工艺应用打下了一定的实践基础。

In order to study the ablation quality process of carbon fiber reinforced plastics(CFRP)with 20 W nanosecond laser,theoretical analysis and experimental verification were carried out by the single-factor experimental method and photo-section method.Effects of scanning speed,peak power,and defocus amount on the surface processing quality of the material were studied.A piece of 0.5 mm thick CFRP was ablated in experiments.The results show that adjusting the defocusing amount made the focus of the laser and the material plane at the same horizontal height,which could minimize the scanning line width,reduce the heat-affected zone and improve the laser energy utilization.When the laser scanning speed is 220 mm/s and,the peak laser power is 10 W,the average surface roughness of CFRP composite is the smallest.About 3.50μm,and the roughness data stability sample difference is the best,about 0.133μm 2;the laser process parameter combination method ablation CFRP composite materials can obtain ideal processing performance.The above research for pulsed laser processing CFRP material process research provides some references and lays a certain practical foundation for the application of pulsed laser processing composite material process.