某汽车注塑件熔接缺陷仿真分析及设计优化  

Simulation Analysis and Design Optimization of Welding Defects of an Automoblie Injection Components

作　　者：龙泉 戴宇 欧阳波 唐锋 LONG Quan;DAI Yu;OUYANG Bo;TANG Feng(Bosch Automotive Parts(Changsha)Company Limited,Changsha 410100,China;Hunan Industry Polytechnic,Changsha 410006,China;Intelligent Flexible Machining Technology for Complex Thin-walled Precision Parts Hunan Engineering Research Center,Changsha 410006,China)

机构地区：[1]博世汽车部件(长沙)有限公司,湖南长沙410100 [2]湖南工业职业技术学院,湖南长沙410006 [3]复杂薄壁精密零件智能柔性加工技术湖南省工程研究中心,湖南长沙410006

出　　处：《汽车实用技术》2024年第15期97-101,共5页Automobile Applied Technology

基　　金：湖南省自然科学基金科教联合基金项目(2023JJ60192)。

摘　　要：汽车雨刮电机齿轮盖通常采用注塑成型技术,在材料中加入玻璃纤维增加成品强度。以电机齿轮盖的螺钉孔强度为研究对象,首先,利用模流分析软件Moldflow对原始方案进行成型过程分析,发现螺钉孔边缘存在熔接痕,结合力矩试验确认强度未满足设计要求;然后对设计方案进行优化,对螺钉孔进行径向加厚处理;最后对优化前后方案进行装配试验和压溃力试验对比验证。结果表明,螺钉孔径向增加2mm,承载能力增加100%,装配力矩从1.75 Nm提高到2.1 Nm,满足设计要求,为玻璃纤维增强材料的强度设计提供了参考。The motor gear cover of automobile wiper system is generally made by injection molding technology,and glass fiber is added into raw material to enhance strength of product.Taking the strength of screw hole of motor gear cover as the research object,firstly,the mold flow analysis software Moldflow is used to analyze the forming process of the original scheme,and it is found that there are weld marks on the edge of the screw hole,and the strength did not meet the design requirements combined with the torque test;then the design scheme is optimized and the screw hole is thickened by radial direction;finally,the assembly test and crushing force test are compared and verified before and after optimization.The results show that the supporting capacity is increased 100%when radial thickness is added by 2 mm,and the assembly torque is increased from 1.75 Nm to 2.1 Nm,which meet the design requirement and provide the refence for strength design of glass fiber enhanced material.

关 键 词：熔接 缺陷 电机齿轮盖 玻璃纤维 模流分析 强度 压溃力 

分 类 号：U466[机械工程—车辆工程]