基于CAE技术的翘曲分析及反变形补偿设计
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摘要
针对注塑件加玻璃纤维引起的翘曲变形,传统方法很难做到精确地预测,为产品反变形补偿设计提供可靠依据。基于CAE技术,运用Moldex3D软件对添加玻纤的某"C"型产品进行"冷却+充填+保压+冷却+翘曲"分析,得到各方向翘曲位移量。采用反变形原理修改原始方案产品结构设计,试模验证模拟的可靠性,误差控制在5%以内。依据Moldex3D模拟结果的翘曲变形量,指导产品变更设计的反变形补偿量,成功解决了"C"型产品的翘曲变形问题。随机抽样测量15组产品,最大翘曲量为0.04 mm,远小于0.2 mm的精度要求。CAE技术为降低产品的开发风险提供了保障,反变形技术为注射成型时翘曲变形的控制、模具及工艺设计的选择和预留变形量的确定等提供可靠依据。
It is difficult to accurately predict the warping deformation caused by adding glass fiber to injection molded parts,which provides a reliable basis for the design of anti-deformation compensation. Based on CAE technology, Moldex3D software was used to analyze the "cooling +filling +holding +cooling +warpage"of a "C"product with glass fiber,and getting the warpage displacement in all directions. The principle of reverse deformation was used to modify the original scheme,and the reliability of the simulation was verified by trial design. The error control was less than 5%. According to the warping deformation of Moldex3D simulation results,the anti-deformation compensation of product change design was directed to solve the warping deformation problem of "C"type product successfully. Random sampling of 15 groups of products with a maximum warpage of 0.04 mm and an accuracy of much less than 0.2 mm. CAE technology provides a guarantee for reducing the risk of product development. Anti-deformation technology provides a reliable basis for control of warpage during injection molding,selection of mold and process design,and determination of reserved deformation amount.
It is difficult to accurately predict the warping deformation caused by adding glass fiber to injection molded parts,which provides a reliable basis for the design of anti-deformation compensation. Based on CAE technology, Moldex3D software was used to analyze the "cooling +filling +holding +cooling +warpage"of a "C"product with glass fiber,and getting the warpage displacement in all directions. The principle of reverse deformation was used to modify the original scheme,and the reliability of the simulation was verified by trial design. The error control was less than 5%. According to the warping deformation of Moldex3D simulation results,the anti-deformation compensation of product change design was directed to solve the warping deformation problem of "C"type product successfully. Random sampling of 15 groups of products with a maximum warpage of 0.04 mm and an accuracy of much less than 0.2 mm. CAE technology provides a guarantee for reducing the risk of product development. Anti-deformation technology provides a reliable basis for control of warpage during injection molding,selection of mold and process design,and determination of reserved deformation amount.
引文
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[3]翟豪瑞,王小松,熊新,等.用Moldex3D对副仪表盘热流道浇口时序的优化[J].现代塑料加工应用,2017,29(6):54–56.Zhai Haorui,Wang Xiaosong,Xiong Xin,et al.Optimization of hot runner gate time sequence of auxiliary instrument panel by moldex3D[J].Modern Plastics Processing and Applications,2017,29(6):54–56.
[4]王超房,黄明,赵振峰,等.基于预变形的长条状注塑制品翘曲控制[J].工程塑料应用,2016,44(8):46–49.Wang Chaofang,Huang Ming,Zhao Zhenfeng,et al.Warpage control of injection-molded strip-like plastic parts based on predeformed design[J].Engineering Plastics Application,2016,44(8):46–49.
[5]周国发,贺永媛.微孔塑料注射成型制品体积收缩与翘曲变形数值分析[J].中国塑料,2007,21(10):61–65.Zhou Guofa,He Yongyuan.Numerical analysis of volumetric shrinkage and warpage of injection molded microcellular parts[J].China Plastics,2007,21(10):61–65.
[6]伊明扬,葛晓宏,翟豪瑞.基于Modex 3D分析的空气滤清器结构的改进[J].厦门理工学院学报,2017,5(25):7–11.Yin Mingyang,Ge Xiaohong,Zhai Haorui.Structural optimization of air filter cartridges based on modex 3D[J].Journal of Lujiang University,2017,5(25):7–11.
[7]谢英,郑国强,周应国,等.塑件翘曲变形分析CAE在注射模冷却系统设计中的应用[J].模具工业,2008,34(9):29–32.Xie Ying,Zheng Guoqiang,Zhou Yingguo,et al.Application of CAE in warpage analysis and in design of injection mould cooling system[J].Die&Mould Industry,2008,34(9):29–32.
[8]廖秋慧,刘淑梅.注塑成型保压参数对塑件翘曲变形的影响[J].塑料科技,2009,37(10):67–69.Liao Qiuhui,Liu Shumei.Effect of packing parameters on warpage of moulded part during injection moulding[J].Plastics Science and Technology,2009,37(10):67–69.
[9]黄明瑜,关安南,王大中.Moldflow在玻纤增强产品翘曲优化中的应用[J].塑料工业,2013,41(10):20–23.Huang Mingyu,Guan Annan,Wang Dazhong.Application of Moldflow in the warpage of glass-fiber reinforced plastic[J].China Plastics Industry,2013,41(10):20–23.
[10]孙海涛,熊鹰,黄政.复合材料螺旋桨纤维铺层的影响及预变形设计[J].华中科技大学学报:自然科学版,2014,42(5):116–121.Sun Haitao,Xiong Ying,Huang Zheng.Effect of stacking mode of composite laminates and pre-deformed design of composite marine propellers[J].Journal of Huazhong University of Science and Technology:Nature Science Edition,2014,42(5):116–121.