材料模型对汽车覆盖件回弹的影响及参数反求.doc

材料模型对汽车覆盖件回弹的影响及参数反求摘要 本论文的内容主要包括两部分： 第一部分利用CAE软件包Dynaform为工具,通过对典型汽车覆盖件的CAE工艺性分析,比较详细地论述了汽车覆盖件模具的设计过程和设计考虑因素。对于在分析的过程中出现的回弹、起皱、拉裂等情况，最终通过修改工艺参数来解决出现的问题。事实证明,将CAE技术应用于汽车覆盖件冲压模具设计的过程中,可以为汽车覆盖件无论在模具设计还是材料模型上都提供可靠的判据和合理的工作参数,提高汽车覆盖件模具设计效率及制造质量。 第二部分利用isight软件为平台对30次成型文件及回弹文件参数分析，以U形件为例，在DYNAFORM中进行了回弹分析，并在Matlab 中编制了回弹量的导出，利用isight软件分析回弹量与材料模型之间的数学关系，分析材料模型中的参数对汽车覆盖件回弹的影响；再根据制造中覆盖件回弹要求，利用isight反求材料参数。数值模拟的结果表明，在研究回弹的试验中，将材料模型参数作为重要因素加入了工艺优化方案，能显著降低冲压成形件的回弹量，为控制和解决回弹问题提供了一种新思路。 关键词：DYNAFORM；分析；模具设计；Matlab；isight；参数反求  Analysis of Material Models on the Springback Impact of Automobile Parts and Inverse Identification of Material Parameters ABSTRACT This paper mainly include two parts: The first part of the paper take Dynaform which is the CAE software package as a tool,using the tool to analyse the CAE manufacturability of the typical automobile cover parts, and telling us the process of the mould of automobile cover parts been produced and the influence facts of the design. For the springback, wrinkle, crack, etc problems appears during the analysis, we decide to modify the process parameters to solve these problems.The fact Proved that by using be CAE technology for automotive panel stamping die design process, both good at automotive body panel material in the mold design or model are to provide a reliable criterion and reasonable operating parameters,the rusult is the efficiency of automotive panel die design and manufacturing quality have been improved. 牋The second part we use the software which is isight for the platform a，analysising the documents of the 30 documents forming parameter and springback.Take the U-shaped pieces for example, analysis the spring in DYNAFORM and use the Matlab preparation the export of the springback, using isight Software analysis the mathematical relationship between the springback and the material models, analytical material model parameters on the springback of automotive panel; then rebound panel in accordance manufacturing