磨料颗粒速度对汽车CFRP表面涂层去除率的影响  

Effect of Abrasive Particle Velocity on the Coating Removal Rate of Automotive CFRP Surfaces

作　　者：易茜[1,2] 张莹[3] 张红新 YI Qian;ZHANG Ying;ZHANG Hongxin(College of Mechanical and Electrical Engineering,Southeast University ChengXian College,Nanjing 210088,China;College of Mechanical and Electrical Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;Department of Educational Research,Shandong Traffic Technician College,Linyi 276000,China;College of Electrical Engineering,Nanjing Vocational University of Industry Technology,Nanjing 210031,China)

机构地区：[1]东南大学成贤学院机械与电气工程学院,江苏南京210088 [2]南京航空航天大学机电学院,江苏南京210016 [3]山东交通技师学院教育研究处,山东临沂276000 [4]南京工业职业技术大学电气工程学院,江苏南京210031

出　　处：《塑料工业》2023年第11期123-128,共6页China Plastics Industry

基　　金：山东省交通运输厅科技计划项目(2020B21)资助。

摘　　要：针对汽车碳纤维增强树脂基复合材料(CFRP)表面损伤涂层的无损基材去除,收集牌号为2124的酚醛类树脂塑料制备磨料,提出塑性磨料气-固两相射流加工方法。通过单因素控制试验和数值模拟相结合的方法,在不同气体压力下用30~40目的塑性磨料对涂装有机涂层的CFRP试样板进行冲蚀试验,研究了颗粒速度随气体压力的变化规律。借助扫描电子显微镜(SEM)和超景深三维显微镜观察涂层冲蚀表面的三维形貌,阐明了涂层去除机理,研究了冲蚀角度和磨料形状对冲蚀机理的影响,定量分析了塑性磨料在不同气体压力下的涂层去除量。结果表明,随着气体压力的增加,涂层去除率增加。涂层在较低的颗粒速度下主要以微耕犁导致塑性变形的方式去除,在较高的颗粒速度下主要以微切削的方式去除。本研究可为塑性磨料气射流去除汽车CFRP表面涂层技术提供理论参考。For non-destructive substrate removal of damaged coatings on the surface of automotive carbon fiber reinforced polymer(CFRP),phenolic resin plastics were collected with the number 2124 to prepare abrasives and a plastic abrasive air-solid two-phase jet machining method was proposed.A combination of single-factor control tests and numerical simulations were used to perform erosion tests on CFRP specimens coated with organic coatings using 30~40 mesh abrasives at different jet pressures,and the variation law of particle velocity with jet pressure was investigated.The three-dimensional morphology of the coating erosion surface was observed by scanning electron microscope(SEM)and ultra-deep field three-dimensional microscope to elucidate the coating removal mechanism,and the influence of erosion angle and particle shape on the erosion mechanism were investigated to quantify the coating removal mass under different jet pressure.The results show that the coating removal rate increases with the increase in jet pressure.The coatings are removed mainly by micro-plowing leading to plastic deformation at lower particle velocities and by micro-cutting at higher particle velocities.It could provide a theoretical reference for plastic abrasive air jet removal technology for automotive CFRP surface coatings.

关 键 词：气射流加工 酚醛树脂 塑料磨料 碳纤维增强树脂基复合材料 有机涂层 

分 类 号：TQ327.3[化学工程—合成树脂塑料工业]