基于Moldflow的汽车手套箱箱盖的翘曲变形优化分析  

Optimization Analysis of Warpage Deformation of Automobile Glove Box Cover Based on Moldflow

作　　者：谭安平[1] 刘克威[1] TAN Anping;LIU Kewei(The Engineering&Technical College of Chengdu University of Technology,Leshan 614000,China)

机构地区：[1]成都理工大学工程技术学院

出　　处：《中国塑料》2019年第11期53-59,共7页China Plastics

摘　　要：为了预测和降低翘曲风险,在模具设计及制造前,利用Moldflow模流分析软件对产品的翘曲变形进行分析及预测。以汽车手套箱盖的翘曲变形量为质量评价目标,针对翘曲变形产生的3个主要因素(取向效应、冷却不均、收缩不均)逐一进行优化。结果表明,在模具结构方面,调整浇口位置和调整冷却系统使翘曲变形量明显降低;在工艺方面,对熔体温度、模具温度、保压压力、保压时间4个工艺参数进行正交试验,通过极差分析,得出各个工艺参数的影响程度及最佳工艺方案,对此方案进行保压曲线优化后,翘曲变形量进一步降低,形成最终方案;计算机辅助工程(CAE)数值模拟对模具设计有很强的指导性作用,可大大减少修模次数并降低模具报废的机率。In order to predict and reduce the warpage risk,Moldflow software was adopted to analyze and predict the warpage deformation of an injection-molded part before the die design and manufacturing.Taking the warping deformation of automobile glove box cover as a quality evaluation objective,three main factors for warpage deformation,including orientation effect,uneven cooling and uneven shrinkage,are optimized one by one.In the case of die structure,the adjustment of gate position and cooling system could make the warpage deformation decrease significantly.As for the optimization of processing conditions,we conducted an orthogonal experiment with four process parameters,which included the melt temperature,die temperature,holding pressure and holding time.The influence of each process parameter and the optimum process plan were obtained by range analysis.After further optimizing the holding curve of the scheme,the influence level for each process parameter was obtained.The warpage deformation could be further reduced to form the final scheme.The practice production proved that the CAE numerical simulation could provide a good guidance for the design of die and reduce the number of die repair and the probability of die scrap significantly.

关 键 词：汽车手套箱盖 翘曲变形 正交试验 优化 

分 类 号：TQ320.66[化学工程—合成树脂塑料工业]