碳纤维复合材料皮秒激光旋切制备大孔工艺  

Picosecond Laser Drilling of Carbon Fiber Reinforced Composite Laminates by Helical Drilling Process

作　　者：陶能如 蔡颂 陈根余[2] 肖铮铭 韦怡 Tao Nengru;Cai Song;Chen Genyu;Xiao Zhengming;Wei Yi(School of Intelligent Manufacturing,Hunan First Normal University,Changsha 410205,Hunan,China;Laser Research Institute,Hunan University,Changsha 410082,Hunan,China)

机构地区：[1]湖南第一师范学院智能制造学院,湖南长沙410205 [2]湖南大学激光研究所,湖南长沙410082

出　　处：《光学学报》2024年第14期210-222,共13页Acta Optica Sinica

基　　金：深圳市重大科技计划专项(JSGGZD20220822095401003);中国博士后科学基金面上项目(2023M731347);湖南省自然科学基金面上项目(2023JJ30183)。

摘　　要：针对碳纤维增强树脂基复合材料(CFRP)板的激光制孔加工,采用传统二维振镜激光扫描工艺存在孔锥度、热影响区大等难题,提出使用CFRP皮秒激光旋切制备大孔工艺。采用单因素实验方法,进行理论分析和实验验证,揭示皮秒激光旋切工艺下制孔锥度和热影响区的产生机制,着重分析工艺参数(楔形棱镜偏转角度、反射镜平移距离、旋切转速、激光功率、重复频率)对制孔过程中热影响区和孔锥度的影响规律,以及纤维取向对制孔质量的影响。研究表明:合理优化CFRP旋切制孔工艺的参数,可获得孔锥度为0.5°、热影响区为50μm以下的优质孔。研究可为超快激光高质量加工CFRP板材孔的工程应用提供理论参考和实验基础。Objective For the drilling of carbon fiber reinforced polymer(CFRP) laminates, there are some disadvantages such as hole taper and large heat affected zone(HAZ) when the traditional two-dimensional galvanometer scanning method is adopted. Herein, a helical drilling process is developed for drilling the CFRP laminate with large diameter holes.Theoretical analysis and experimental validation are carried out using a one-factor test method to reveal the generation mechanisms of hole taper and HAZ in helical drilling. The influence of process parameters(wedge prism deflection angle,mirror translation distance, rotary speed, laser power, and repetition frequency) on the HAZ and hole taper, and the influence of fiber orientation on the quality of drilled holes during laser drilling are analyzed. The results show that the highquality hole of CFRP with a hole taper of 0.5° and a HAZ size of less than 50 μm can be obtained by rationally optimizing the helical drilling process parameters. Finally, we may provide a theoretical reference and experimental basis for further engineering of high-quality drilling of CFRP laminates by lasers.Methods We develop a novel helical drilling process for CFRP laminates by picosecond lasers, which enables arbitrary adjustment of the hole diameter and is particularly suitable for drilling large holes in CFRP laminates. For this helical drilling process, the laser beam rotates along the circumference of the target diameter, and meanwhile, the laser beam rotates at high speed around its beam axis. The high-speed rotation of the laser beam is similar to the rotation of the drill bit in mechanical drilling, which can achieve a larger machining width. Among them, R is the eccentricity distance of the incidence point of the laser beam. The rotary cutting radius r is the amount of material removed, which is controlled by the helical drilling optical system. Additionally, the helical drilling experiments are conducted with compressed air. After the experiments, a super depth of field three-dimensi

关 键 词：光学制造 碳纤维增强树脂基复合材料 皮秒激光 旋切制孔 孔锥度 热影响区 

分 类 号：TN249[电子电信—物理电子学]