车轴激光清洗表面质量分析及在线评估  

Quality Analysis and Online Evaluation of Axle Surface After Laser Cleaning

作　　者：王春生 王洪潇 徐惠妍 何广忠 李凯 谷晓鹏[2] 董娟 Wang Chunsheng;Wang Hongxiao;Xu Huiyan;He Guangzhong;Li Kai;Gu Xiaopeng;Dong Juan(Engineering and Technology Center,CRRC Changchun Railway Vehicles Co.,Ltd.,Changchun,Jilin 130113,China;College of Materials Science and Engineering,Jilin University,Changchun,Jilin 130112,China)

机构地区：[1]中车长春轨道客车股份有限公司工程技术中心,吉林长春130113 [2]吉林大学材料科学与工程学院,吉林长春130112

出　　处：《中国激光》2022年第8期43-53,共11页Chinese Journal of Lasers

基　　金：国家重点研发计划(2017YFB1105000);吉林省科技发展计划(20190302044GX);长春市科技计划(18SS016)

摘　　要：基于高铁转向架轮对在高级检修过程中的漆层去除需求,采用激光清洗技术对高强钢表面漆层进行去除,研究不同功率下漆膜的去除状况,分析不同清洗状态下工件表面的宏观、微观形貌及成分变化;之后,采用机器视觉技术提取工件表面状态图像并进行处理,提取出黑、白像素点的差异并将其作为特征值对工件表面的清洗状态进行判定,为高强钢表面漆层的去除提供了实用的工艺参数及检测方法。Objective The main component of high-speed rail is the bogie wheel,which has extremely strict maintenance requirements.The surface coating needs to be removed in advanced maintenance.Traditional surface coating removal methods are mechanical grinding and chemical treatment.These methods can easily cause excessive grinding in local areas,thereby causing surface damage.Therefore,designing a new coating removal technology is urgent to reduce environmental pollution,labor costs and achieve green,efficient,and high-quality coating removal.Laser cleaning technology has been widely used in coating surface treatment because of its high cleaning accuracy with no chemical cleaning agent and no physical or mechanical contact.Moreover,it can be easily automated.Therefore,we adopt laser cleaning technology for the axle body of existing high-speed rail bogie wheel sets.Through the laser cleaning process analysis of the surface coating of high-strength steel,the evolution of the surface microstructure of high-strength steel after laser cleaning,and the online evaluation method of the surface quality after laser cleaning,a breakthrough is made in the laser cleaning technology of the surface of a high-strength steel axle.Thus,it lays the application foundation for applying green and efficient surface treatment technology to overhaul key parts of the high-speed railway body.Methods High-strength steel was chosen as the experimental material,and red primer and gray finish were sprayed on the surface.The primer thickness was 50--60μm,and the gray finish thickness was 230--260μm.During laser cleaning experiment,laser was used to scan the sample surface along the bow-shaped path.The main laser cleaning process parameters were listed in Table 2.The surface morphology and composition of the prepared samples were observed and analyzed using the laser confocal microscope,digital microscope,and field emission scanning electron microscope.The experimental design of the laser cleaning workpiece surface inspection mechanism and laser cleani

关 键 词：激光技术 激光清洗 表面形貌 激光测距 在线评估 

分 类 号：TG178[金属学及工艺—金属表面处理]