汽车尾灯灯罩开裂问题分析  

Analysis of Cracking Problem of Automobile Tail Lamp Cover

作　　者：龙泉 梁少龙 李浪 唐锋 Long Quan;Liang Shaolong;Li Lang

机构地区：[1]博世汽车部件(长沙)有限公司,长沙410000 [2]奇瑞汽车股份有限公司,安徽芜湖241000 [3]湖南工业职业技术学院,长沙410000

出　　处：《机械制造》2024年第10期101-105,共5页Machinery

基　　金：湖南省自然科学基金科教联合基金资助项目(编号:2023JJ60192)。

摘　　要：汽车尾灯灯罩一般由聚甲基丙烯酸甲酯制成,能使光线更好地聚集和分布。对某车型售后汽车尾灯灯罩开裂问题进行分析,确认要因为灯具总成退火去应力不足和后风窗玻璃洗涤液乙醇含量高。针对汽车尾灯灯罩开裂问题,制订了对策,采用整形工装,优化退火参数,退火温度为85℃,退火时间为90 min,将黑片聚甲基丙烯酸甲酯更换为延展性更优的丙烯腈-苯乙烯-丙烯酸酯共聚物,将白片聚甲基丙烯酸甲酯更换为耐醇性更好的IH830SR聚甲基丙烯酸甲酯。通过实施对策,汽车尾灯灯罩开裂问题得到了有效控制。The automobile tail lamp cover is generally made of PMMA,which can make the light better concentrated and distributed.The cracking problem of the automobile tail lamp cover of an aftermarket vehicle model was analyzed,and it is confirmed that essential factors are the insufficient annealing stress relief of the lamp assembly and the high ethanol content of the rear windshield washing liquid.In view of the cracking problem of the automobile tail lamp cover,countermeasure was formulated,shaping tooling was adopted,the annealing parameter was optimized.The annealing temperature is 85℃,the annealing time is 90 min,the black sheet PMMA is replaced with ASA with better ductility,and the white sheet PMMA is replaced with IH830SR PMMA with better alcohol resistance.Through the implementation of countermeasure,the cracking problem of the automobile tail lamp cover had been effectively controlled.

关 键 词：汽车 灯罩 开裂 故障 分析 

分 类 号：U463.651[机械工程—车辆工程]