基于反变形和CAE的手机前壳翘曲优化

为提高手机前壳的成型质量，减小翘曲变形，提出了基于反变形和CAE的优化方法。介绍了手机前壳的平面度 误差要求和反变形设计原理，利用CAE软件Moldflow对手机前壳的注塑成型过程进行数值模拟，得到了翘曲变形的Z 方向位移分量，从而获得变形补偿量；对原始设计模型进行反变形设计和模拟验证，预测的平面度误差符合质量要求。 按反变形设计模型进行模具设计和制造，对生产样件进行平面度和外形尺寸检测，平面度误差为0.180 0 mm，比平面度 公差要求小0.170 0 mm，外形尺寸误差均在公差范围之内。研究表明该方法可以通过变形补偿来提高塑件的尺寸精度。

Warpage Optimization of Phone Front Shell Based on CAE and Reverse Deformation Method

ln order to improve the molding quality of phone front shell and reduce warpage, a method of optimization based on reverse deformation and CAE technique was provided. The flatness of phone front shell and method of reverse deformation was introduced. The numerical simulation for the injection process of phone front shell was put forward by means of Moldflow, which is one of computer aided engineering software,and the Z-component displacement of warpage was presented. The deformation compensation amount was obtained, and the reverse deformation design of the original design model was executed. The simulation verification of reverse deformation model were carried out, and the flatness error of prediction was in accord with quality requirements. The injection mold was designed and manufactured according to reverse deformation model. The plastic parts of phone front shell were measured for flatness and outline dimension, and the flatness error was 0.180 0 mm, which was lessen 0. 170 0 mm comparing with flatness tolerance. The outline dimensions was within the tolerance range. The results show that it can improve the precision of plastic parts by means of deformation compensation.