车身外观面涂不良的原因分析及改善措施  

The Analysis Causes and Improvement Measures of the Poor Topcoat Quality on the Car Panels

作　　者：李春艳 曾平 LI Chunyan;ZENG Ping(GAC Motor Company Limited,Guangzhou 511434,China)

机构地区：[1]广汽乘用车有限公司,广东广州511434

出　　处：《汽车实用技术》2023年第8期170-173,共4页Automobile Applied Technology

摘　　要：在新车型试制过程中,前后外板面涂不良,主要表现为橘皮缺陷。为在车型量产前解决该橘皮缺陷,通过面涂关键参数及其他工序过程参数排查,判断橘皮缺陷主要影响因素为钢板外观、涂料及涂装工艺。经过优化及验证,钢板粗糙度由1.264μm降低到0.8~1.0μm、清漆为由1 K变为2 K、清漆喷涂流量提高10%~15%及链速降低6.4%后,前后门外板面涂橘皮缺陷得以改善。In the trial production of the new car,the topcoat quality of the front and rear exterior panels are poor,mainly showing orange peel defects.In order to solve the orange peel defects before the mass production of the car,through the investigation of the key parameters of the topcoat and the process parameters of other proceduces,it is determined that the main influencing factors of orange peel defects are the surface appearance of the steel plate,painting materials and coating processes.After the optimization and the verification,the coating defects of orange peel on front and rear door panels are improved after the roughness of the steel plate is reduced from 1.264μm to 0.8~1.0μm,the varnish is changed from 1 K to 2 K,the varnish spraying flow is increased by 10%~15%and the chain speed is reduced by 6.4%.

关 键 词：橘皮缺陷 钢板粗糙度 涂料材料 涂装工艺 

分 类 号：TQ639.1[化学工程—精细化工] U466[机械工程—车辆工程]