基于响应面分析的碳纤维复合材料基体激光除漆工艺优化  

Optimization of Laser Paint Removal Process for Carbon Fiber Composite Substrate Based on Response Surface Analysis

作　　者：陈亚军[1] 鲁文婷 杨雅婷 Chen Yajun;Lu Wenting;Yang Yating(Sino-European Institute of Aviation Engineering,Civil Aviation University of China,Tianjin 300300,China)

机构地区：[1]中国民航大学中欧航空工程师学院,天津300300

出　　处：《中国激光》2023年第12期157-168,共12页Chinese Journal of Lasers

基　　金：天津市研究生科研创新项目(航空专项)(2021YJSO2S11)。

摘　　要：为研究激光去除复合材料基体表面漆膜的工艺规律并优化激光除漆参数,采用纳秒脉冲激光器对碳纤维复合材料表面的环氧树脂漆进行去除;基于响应面优化法,以除漆表面微观形貌、纤维暴露百分比、单脉冲除漆深度及微观不平度十点高度为指标对激光参数的影响规律进行分析并进行参数优化。结果表明:激光功率P、重复频率f、扫描速度v分别对纤维暴露百分比、单脉冲除漆深度、微观不平度十点高度的影响最为显著。采用低频(f<25 kHz)高功率(P>14 W)激光慢速(v<130 mm/s)扫描可以获得更少的漆层残留、更高的纤维暴露百分比及更高的除漆效率,采用中频(40 kHz<f<60 kHz)低功率(P<11 W)激光快速(v>180 mm/s)扫描可以获得更接近标准值(45~55μm)的微观不平度十点高度,可以保证除漆质量。最终得到最佳工艺参数组合为:激光功率14.4 W,扫描速度200 mm/s,重复频率20 kHz。本研究可为今后复合材料基体除漆工艺参数的确定提供参考。Objective The paint layer on the surface of aircraft skin,automobile bodies,and ships adds a visual appeal and helps in corrosion prevention and improvement of aerodynamic shape.However,because of the requirements of equipment overhaul,substrate maintenances and paint layer repair,the old paint layer needs to be removed,and the surface needs to be repainted periodically.Traditional paint removal processes,such as chemical and mechanical paint removal,are laborious,easily cause substrate damage,and significantly reduce the service time of parts.Laser paint removal is an emerging paint removal technology with the advantages of high efficiency,environmental protection,controllable parameters,and automation,and it has potential for industrial applications.Response surface optimization is a process parameter optimization method that requires fewer operations,has shorter test cycles,and yields higher accuracy of results.Based on this background,we investigate the effect of laser parameters on varnish removal on the surface of carbon fiber composites using the response surface optimization method.Process parameters are also optimized to obtain a combination of process parameters with excellent paint removal effect,moderate efficiency,and guaranteed repainting quality.Methods A three-factor,three-level Box-Behnken experimental design with laser power P,pulse frequency f,and scanning speed v as input factors was used for laser paint removal tests.The optimization parameters were determined using Design Expert’s threedimensional graphics technology,which significantly reduces the complexity of the technical study caused by the low damage threshold and poor thermal conductivity of the composite material.After the paint removal test,Image Pro Plus software was used to calculate carbon fiber exposure percentage E.Laser confocal microscopy was then used to determine the depth of paint removed,tenpoint height of irregularities of the paint removal surface,and the single-pulse paint removal depth D,also known as the paint abla

关 键 词：激光技术 激光除漆 碳纤维复合材料 工艺参数 响应面优化 

分 类 号：TN249[电子电信—物理电子学]