摘   要随着CAD/CAE/CAM一体化的不断推广与发展，模具结构的设计不断获得创新与优化。模具新工艺与新材料也在不断创新，推动注塑成型技术的快速发展，提高了生产率，改善质量，并且降低了生产成本、减轻了劳动强度。本文以20L盖注塑模具的关键零件作为研究的对象，其中关键零件主要为成型零件。研究过程中首先通过设计计算获得理论中的关键零件的结构尺寸，并借助三维建模软件Pro/E进行建模，获得成型零件的三维模型，将该模型导入ANSYS有限元软件中进行静力分析，分析求解后得到一系列的应力云图及变形云图，从中可以很直观地确定各个零件的受力状况以及变形程度，根据最大应力值与最大变形值判断其是否满足强度及刚度的要求。接着，把通过理论计算得到的关键零件进行有限元分析之后，再结合本公司里经验数据获得的关键零件进行有限元分析，将两者的分析结果进行比较。比较后的结果显示，理论数据比经验数据来说变形较小、应力较小，但是两者都满足强度及刚度要求。86659

另外，通过应力云图及变形云图同样可以获得各个关键零件的应力集中处以及最大变形的位置，如型腔内壁应力集中明显，螺纹型芯螺纹处应力集中明显等，根据这些结果可以进行优化设计，同样也可以根据注塑模具关键零件的结构及实际工程运用方面进行优化分析，并且提出几个优化方案。

毕业论文关键词：注塑模具；成型零件；有限元分析；优化设计；

Abstract

With the development and promotion of CAD/CAM/CAE, the design of mold structure is constantly getting innovation and optimization。 Mold new technology and new materials are also in constant innovation, promote the rapid development of injection molding technology, improve the productivity and quality, and reduce the cost of production and the labor intensity。 In this paper, much research and analysis have been conducted to the key parts of the injection mold about 20L lid, mainly for molding parts。 In the course of the study, the structure size of the key parts in the theory is obtained through the design and calculation。 Pro/E software is adopted to design three-dimensional model of key parts of injection mold。 Meanwhile, the model is imported to the finite element software ANSYS to make static FEA, thus get the corresponding equivalent stress and displacement map trying to determine each position in the key parts of the injection mold stress and displacement, according to the maximum stress value and the maximum deformation value to judge whether to meet the strength and stiffness requirements。 Secondly, the results of FEA about the key parts obtained by the theoretical calculation are compared with the results of FEA about the key parts obtained by the company’s empirical data。 After comparison, the results show that the theoretical data is less deformed and the stress is smaller than the empirical data, but both of them meet the strength and stiffness requirements。

In addition, the stress concentration and the maximum deformation position of the key parts can be obtained by the stress and deformation diagram, such as the stress concentration is obvious in the inner wall of the cavity, and the stress concentration is obvious in the thread core。 According to these results, we can optimize the design。 We can also optimize the design based on the structure of the key parts of the injection mold and the actual engineering application, and put forward several optimization program。

Keywords: injection mold; molding parts; the finite element analysis; the optimization design

目  录

第一章 绪论 1

1。1 课题背景 1