【作者】 侯建英；

【导师】 戴士杰；

【作者基本信息】 河北工业大学 ， 机械电子工程， 2007， 硕士

【摘要】 虚拟制造作为产品设计的一项新技术,对传统的产品设计方法来说是一次革命性的变革。通过虚拟制造技术,工程师可以采用机械系统运动仿真,在产品设计阶段就发现产品设计中的潜在问题,并快速进行修改,减少设计对物理样机的依赖,这样不仅可以节省成本,缩短产品开发周期,而且可以提高产品性能,增强产品竞争力。将虚拟制造技术应用于数控电火花机床的设计中,研究了特征造型、动力学分析系统和有限元分析系统之间的转换方法和技术,利用PRO/E软件建立了样机零部件的实体模型,并在此基础上完成电火花机床机械结构的虚拟装配和装配干涉分析,成功建立了机床的虚拟样机。此虚拟样机模型可进一步在ADAMS软件中进行运动仿真和动力学分析,从而节省了建模时间。在用PRO/E建模时,省略和简化了部分对仿真精度影响较小的零部件特征,如安装孔、螺钉、螺纹等,模型完善以后通过在ADAMS中添加约束和载荷来实现运动功能以减少ADAMS仿真所需时间,避免仿真失败。在ANSYS有限元分析软件平台上,采用模态分析技术获得机床结构的模态固有频率和主振型,从而实现对机床结构的改进和优化设计。基于运动学和动力学仿真软件ADAMS验证分析了影响机床爬行现象的主要因素,从而实现了机床的进给系统的优化设计。对CTS400数控电火花机床进行了运动平稳性分析。采用ADAMS的运动分析技术分析了整机在各种作业工况下各主要连接件之间的作用力,为有限元分析提供边界条件;对CTS400数控电火花机床结构强度进行了有限元分析,得到了高应力、应变的危险区域,通过对该区域进行结构优化设计,结果表明显著地改善了该部位构件的工作状况,从而保证了整机运行的可靠性。虚拟制造技术的引入,获得了机床静态受力以及运动过程中的微观变形图形及数据,为更直观的了解机床的性能和运动状态提供了可靠的依据,也为日后机床的性能改进提供了技术参考。更多还原

【Abstract】 As a new technology of product design,VM (Virtual Manufacturing) is a revolution to traditional method of products design. Based on virtual manufacturing,engineers can find underlying problems just during products design by simulating the mechanical system,and revise them quickly so as to throw off the physical prototype,which not only can save the cost of design and manufacturing and reduce the cycle of products development , but also can elevate products’performance and enhance products’competition.The paper applied virtual prototype technology to the design of EDM (Electrical Discharge Machining) machine tool. It studies the integrating methods and technology among the characteristic modeling、kinematics analysis and finite element analysis system, software PRO/E (Pro/Engineer-3D solids modeling software) was used to draw the 3-D model of machine tool parts which can assembled to be a virtual machine, interference checking was taken between the parts after assembling finished and the VP (Virtual Prototype) of machine tool was successfully constructed in the end, which is the foundation of motion simulation and dynamic analysis using ADAMS (Automatic Dynamic Analysis of Mechanical Systems)software. Some features that hardly affect the simulation accuracy such as installation holes, screws were overleaped or simplified when modeling in PRO/E, constraint and loading which can achieve motion function were applied in ADAMS in order to decrease the time consumed by modeling and calculation and also keep the simulation from failure.Using the advanced and powerful FEA (Finite Element Analysis) software ANSYS to do the modal analysis on the main structure of machine, then gets the intrinsic frequency and the vibration model in order to achieve improvement and optimum design. Gained optimum design to the feeding system by analysis the main factors effect the problems of crawling based on the dynamics analysis software of machine system ADAMS. Through adopting the technological analysis of ADAMS, analyze the numeric machine tool of CTS400 action force between every main attachment under various operating conditions, so offer the border condition for the finite element analysis; though the finite element analysis about the assembly structure intensity on the numeric machine tool, receive high stress and dangerous area that meet an emergency. Then optimize the structure to this area, and the result indicates that the working condition is improved obviously on this component, thereby guarantee the running reliability of the whole machine.更多还原