摘要
精密冲裁是一种先进的板料成形工艺,具有产品成形质量好,材料利用率高等优点。但是精冲行业普遍存在模具开发周期长、寿命低的问题,严重制约了精冲技术的发展。计算机辅助分析技术能够在设计阶段就对模具的工作状况进行预测,是优化精冲工艺、辅助模具结构设计的重要工具。本文以ANSYS Workbench有限元分析软件为平台,对精冲模具和精冲压力机结构的计算机辅助分析方面进行了深入的研究。
本文首先对密封盖零件和TJB9棘轮零件的成形工艺进行了分析,运用ANSYSWorkbench软件对这两种零件的模具分别进行了静力结构分析,预测了模具的等效应力和变形分布,总结和归纳了精冲模具结构分析前处理的一般设置方法,并利用分析结果对密封盖结构进行了优化,在实际生产中有效解决了密封盖零件加工精度低和模具寿命短的问题。
在模具结构静力分析的基础上,本文对模具和压力机整体结构进行了有限元分析,得到了在工作状况下压力机机身和模具的变形情况,更真实的反映模具在工作时的状况;并通过改变压力机机身导轨与滑块之间的间隙值,对多种不同间隙情况下的压力机和模具进行有限元分析,分别得到了不同间隙情况下压力机和模具的变形状况,并通过对比不同结果分析了导轨间隙对模具和压力机整体刚度的影响。
本文最后提出了在ANSYS Workbench软件平台下开发精冲模具CAE系统的方案;以模具实例分析为基础,结合企业的实际需要对系统进行了需求分析,并对系统的总体框架进行了设计。
Fine-blanking is an advanced processing method which has many advantages,suchas high quality of products and high utilization of materials. However,there are manyproblems existed in fine-blanking industry such as a long development cycle and low lifeof die, which are seriously hampering the development of fine-blanking technology.Computer-aided analyzing technology can predict the working states in the design stage.It is an important tool to optimize the fine-blanking techniques and design the diestructure. In this thesis a thorough research on computer-aided analyze of die and press isconducted on the base of ANSYS Workbench software platform.
The forming process of the sealing cover and ratchet part are introduced firstly inthis thesis. ANSYS Workbench is used to carry on the static structure analysis to the dieof the two kinds of part. The stress and deformation distribution of die are predicted andthe method of the pre-processing setting for analyzing the structure of fine-blanking dieis summarized through the simulation. According to the simulation results, the structureof sealing cover is optimized, and great achievements are made in practical production.
On the foundation of the static analysis of die, finite element analysis of dieassembled with press is carried. The simulation results of both die and frame of press areobtained which reflect the working states of die more truly. What’s more, by changingthe value of the gap between the slider and rails, finite element analysis of press and dieunder different states are taken respectively. Through compare the different results, howgap influencing the overall stiffness of press and die is found out.
Finally, the program of developing a CAE system for fine blanking die on the basicof ANSYS Workbench platform is put forward in the thesis. The demands for the systemare summarized and the overall framework of the system is designed.
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