【作者】 牛锡振；

【导师】 王太勇；

【作者基本信息】 天津大学 ， 机械制造及其自动化， 2006， 硕士

【摘要】 随着企业对数控操作技术工人需求的增大,建立以计算机为平台的数控机床仿真教学培训系统日益受到重视。本文以立式加工中心作为研究对象,探讨了加工中心仿真教学培训系统建立的理论方法及其关键技术,并以制造系统的仿真与建模理论为基础,结合计算机图形技术和仿真技术,开发了适合教学培训的数控加工仿真系统。本文的主要工作如下:1.本文设计了虚拟数控系统,采用逼真的FANUC 0i系统控制面板作为系统界面,并通过虚拟MDI面板实现了NC代码的插入、删除、替换等编辑修改功能,增加了仿真教学培训系统的真实感;2.研究了NC程序代码的分析处理方法和编译原理,并结合FANUC 0i数控系统的编程规范,设计了虚拟数控系统的NC程序代码编译器,实现了NC指令的插补算法,生成了NC坐标信息文件,以此作为驱动NC加工仿真系统的数据源;3.建立了加工仿真环境中需要的刀具数据库、工件数据库、夹具数据库以及装配数据库,利用VB6.0中的ADO数据控件进行显示和管理;4.在对加工中心的运动特点进行分析的基础上,利用层次化建模方法,建立了机床运动模型,实现了虚拟加工中心的运动;5.根据铣削加工特点提出了加工零件及刀具的实体仿真表达模型,实现了虚拟加工过程的三维动态仿真,并提出了零件与加工环境和刀具的干涉碰撞检验方法。更多还原

【Abstract】 Technical workers who can operate NC machine tools being greatly demanded by enterprises, simulation teaching and training system of NC machine tool, which operates with the computer as platform, is considered to play a crucial role and the setup of such a system is being paid more and more attention to. Focused on the vertical machining center, this study was undertaken to explore the theoretical approaches and key techniques of building simulation teaching and training system of NC machining center and to develop a simulation system of NC machining suitable for teaching and training, which is based on simulation and modeling in manufacture system and is combined with the graphical technique and the simulation technique of the computer. The primary jobs of this study are as follows:1. A virtual NC system was designed. With the vivid FANUC 0i system control panel as the system interface, NC codes can be edited and modified by the virtual MDI panel, which adds third dimension to the simulation teaching and training system.2. Analytical approaches and compiling principles of NC program codes were studied and a compiler of NC program codes of virtual NC system, which is combined with the programming criteria of FANUC 0i NC system, was designed. Interpolation arithmetic can be realized and NC coordinate information files can be generated which can be used as data sources of simulation machining system.3. Databases of cutters, workpieces, clamps and assembly were set up.4. Through a stratification of modeling, the locomotion model of the machine tool was set up based on the analysis of locomotion characteristics of the machining center and this can realize the locomotion of the virtual machining center.5. The expressive model of entities was proposed according to the milling characteristics, which can realize the three-dimension dynamic simulation of virtual machining and an interferential-bump checking method was put forward which can be used to check parts, machining environment and cutters.更多还原