封装件液态成形过程数值模拟与模具优化设计..doc

封装件液态成形过程数值模拟与模具优化设计 摘 要 随着铸造CAD/CAE实用化技术的发展及相应的商品化软件的应用，将这些先进的技术运用于产品的开发和质量的改进有着重要的经济和学术意义。本文结合工艺设计，数值模拟来完成模具的改进和优化。 本文通过对封装件液态成型的工艺特点的分析，用UG软件对上 ... p摘 要br / 随着铸造CAD/CAE实用化技术的发展及相应的商品化软件的应用，将这些先进的技术运用于产品的开发和质量的改进有着重要的经济和学术意义。本文结合工艺设计，数值模拟来完成的改进和优化。br / 本文通过对封装件液态成型的工艺特点的分析，用UG软件对上模、下模、砂芯进行了三维建模，利用Procast软件对铸件充型凝固过程进行了数值模拟。准确的反映了铸件充型凝固过程中的实际情况。通过对铸造过程中流场和温度场的分析，与预期成形效果做对比并以此针对模具进行优化设计。 br / br / 关键词：CAD/CAE，铸件，铸造工艺，充型凝固过程，计算机模拟br / nbsp;br / ABSTRACTbr / As cast CAD/CAE practical technology get application progressively and the corresponding commercialized software is used in practice step by step，applying these advanced technology of CAD/CAE to product development and quality improving has very important economic and academic meanings.In this paper，die completion of the improvement and optimization combining the technical design numerical simulation .br / In this paper,by the analysis to the characteristics of the packing of liquid molding process ,it utilizes design software Unigraphics NX to creat three-dimensional modeling for upper die and lower die and core,uses the numerical simulation software Procast to carry on filling and solidification numerical simulation analysis of casting .reflects actual state of castings accurately,predicts defect that may appers during filling and solidificating process then ascertains the position of the defect。through analyse the folw field and temerature fields and compared with the aimed forming effect to die completion the optimum design of the mould。 br / br / Key words： Computer Aided Design/Computer Aided Engineering，Casting，Casting technology，Filling and Solidification process，Copputer simulation /p br / br / pbr / 目nbsp;nbsp; 录nbsp;nbsp;nbsp;nbsp; 字br / 1nbsp;nbsp;nbsp; 绪论nbsp;nbsp;nbsp; 1br / 1.1nbsp;nbsp;nbsp; 数字化产品开发国内外现状nbsp;nbsp;nbsp; 1br / 1.1.1nbsp;nbsp;nbsp; 计算机辅助设计软件nbsp;nbsp;nbsp; 1br / 1.1.2nbsp;nbsp;nbsp; UG软件简介nbsp;nbsp;nbsp; 1 br / 1.1.3nbsp;nbsp;nbsp; ProCAST软件简介nbsp;nbsp;nbsp; 2br / 1.1.4n