基于moldflow对前门护板外板翘曲变形研究及反变形预补偿应用

Research of Warping Deformation and Application of Pre-compensation For Front Door Cladding Outer Part Based on Moldflow

在汽车外饰塑料件薄壁类产品中,受功能及造型限制,一些产品出现壁厚分布不均等情况,容易导致产品收缩不均,成型后会出现较大翘曲变形。本文利用mlodflow对汽车前门护板外板进行模流分析,确定了翘曲变形的原因及对应的变形量,同时结合产品实际尺寸变形量,验证了模拟分析的准确性,进而确定了产品反变形预补偿量,产品实施反变形预补偿后翘曲变形明显减小,解决了由于产品翘曲变形导致前门护板与门槛装配间隙小的问题,满足Cubing及T-car装车要求。

In the thin-wall parts of vehicle exterior plastic products,some have uneven wall thickness distribution and complex modeling due to the limitation of function and modeling appearance,is likely to lead to large warping deformation caused by uneven shrinkage of product.In this paper,the root cause of warping deformation of front door cladding outer part and deformation quantity of assembly defect position have been analyzed based on moldflow,combining with the actual deformation size measurement of product.The pre-compensation quantity was determined and product warping deformation was reduced obviously in this paper.And finally the problem of small gap between front door cladding and rocker panel caused by product warping deformation has been solved,conformed to the requirement of Cubing and T-car assembly。