高重频飞秒激光加工碳纤维复合材料的热影响研究  

Thermal Effects of High-frequency Femtosecond Laser Processing of CFRP

作　　者：李兆艳 谢小柱[1,2,3] 赖庆 黄亚军 Li Zhao-yan;Xie Xiao-zhu;Lai Qing;Huang Ya-jun(School of Electromechanical Engineering,Guangdong University of Technology,Guangzhou 510006,China;Department of Experiment Teaching,Guangdong University of Technology,Guangzhou 510006,China;State Key Laboratory of Precision Electronic Manufacturing Technology and Equipment,Guangdong University of Technology,Guangzhou 510006,China)

机构地区：[1]广东工业大学机电工程学院,广东广州510006 [2]广东工业大学实验教学部,广东广州510006 [3]广东工业大学精密电子制造技术与装备国家重点实验室,广东广州510006

出　　处：《广东工业大学学报》2024年第5期97-104,共8页Journal of Guangdong University of Technology

基　　金：国家自然科学基金资助项目(52075103);广东省基础与应用基础研究基金区域联合基金重点项目(2020B1515120058)。

摘　　要：碳纤维增强复合材料(Carbon Fiber Reinforced Plastics,CFRP)的激光定量去除是航空航天工业中结构修复的关键技术。然而,CFRP中碳纤维和环氧树脂性能的巨大差异使得激光加工非常具有挑战性,热损伤一直是CFRP激光加工广泛应用的主要障碍。为了研究高重频飞秒激光加工对CFRP复合材料的热影响,采用单因素实验方法进行了理论分析和实验验证,分析了激光能量密度、扫描速度和扫描方向对材料烧蚀速率与热影响区的影响规律,并研究了飞秒激光在CFRP上的高精度选区定量去除工艺。结果表明:当工艺参数选择θ=90°,脉宽为290 fs,功率为7 W,频率为100 kHz,扫描速度为300 mm/s,扫描间距为60~80μm时,整体烧蚀表面质量较优,精度(粗糙度)可以达到10μm,去除区域表面热影响区约为33.9μm。Laser selective quantitative removal of CFRP represents a key technology for structural repair in the aerospace industry.However,the huge difference in properties between carbon fiber and epoxy resin in CFRP makes laser processing very challenging,and thermal damage has always been the main obstacle to the widespread application of CFRP laser processing.In order to study the influence of femtosecond laser processing parameters on the machining quality of CFRP,theoretical analysis and experimental verification were carried out by single factor experimental method.The influence of laser energy density,scanning speed and scanning direction on the ablation rate and the width of heat affected zone were analyzed,and the high-precision selective quantitative removal process of femtosecond laser on CFRP was investigated.The results show that when the process parameters are chosen to beθ=90°,pulse width of 290 fs,power of 7 W,frequency of 100 kHz,scanning speed of 300 mm/s,and scanning spacing of 60~80μm,the overall ablation surface quality is superior,and the accuracy(roughness)can be as high as 10μm,and the heat-affected zone(HAZ)on the surface of the removed area is about 33.9μm.

关 键 词：飞秒激光 碳纤维增强复合材料 工艺参数 热影响区 定量去除 

分 类 号：TP241.2[自动化与计算机技术—检测技术与自动化装置]