【作者】 张怀宇；

【导师】 刘胜青；

【作者基本信息】 四川大学 ， 机械制造及其自动化， 2002， 硕士

【摘要】 随着计算机技术、网络信息技术的飞速发展，虚拟制造已经成为当今先进制造技术领域的热点和核心之一。而数控加工过程仿真是虚拟制造的关键技术之一，也是数控技术、仿真技术与虚拟现实技术等先进技术的交叉应用学科之一。目前不少先进的CAD／CAPP／CAM系统都提供了一定的NC仿真功能，但直接通过数控程序来驱动仿真加工过程的软件还很少。我国制造企业中采用手工、半手工进行数控编程的情况依然存在，对于数控加工仿真软件系统的需求是相当迫切的。 VRML已经成为Internet上三维交互式虚拟现实技术平台的开放式标准，利用VRML相关技术开发的数控加工仿真系统，具有开放性和可扩展性，并可实现基于Internet的跨平台交互式操作。本文提出了开发基于VRML数控加工仿真系统的实施方案，以VRML的三维虚拟现实场景作为仿真平台，以网络服务器系统作为信息交换的枢纽，通过互联网进行客户的远程异地协作完成数控加工过程的仿真。本文在VRML数控仿真系统的核心领域的研究中取得了一定的成果，主要内容有： 1 提出了基于特征造型的抽象细分法，描述仿真对象的几何模型，以VRML组件化编程技术支持通用仿真模型类型库，构造网络虚拟现实加工仿真环境的新颖思想，并以VRML混合编程技术编制出数控车削仿真软件模块。该模块具备一定的通用性和扩展性。在对四川大学工程训练中心实习工厂提供的零件加工数控程序进行仿真的实践中取得了比较满意的效果 2 在Windows操作系统和IIS平台上，利用ASP技术结合ADO数据访问技术建立起小型的企业网站服务器系统，作为数控程序编程用户和数控程序仿 论文摘要真用户信息交互的枢纽和信息服务的平台。该系统实现技术简明、维护方便、安全性较好。 3 研究基于VRML技术的数控仿真系统，该系统能够运行于Internet环境，不依赖昂贵的CAD／CAM软件平台，并可以方便地实现企业间加工仿真信息的网络共享和制造资源的集成整合，为提高制造企业的生产效率和加工水平，实现制造企业信息化网络化，进而推动虚拟制造在我国的普及奠定坚实的基础。更多还原

【Abstract】 With the speedy development of the computer and information technology,the Virtual Manufacturing (VM) technology has been substantial to the Advanced Manufacturing Technology (AMT). The process simulation of numerically controlled machine tool is the pivotal technology of VM,and also the intersection of the modern technology such as numerical control,simulation and virtual reality technology. Some advanced CAD/CAM/CAPP softwares have been provided the function of NC simulation,but the simulation software is still wanted that can simulate and display the process of NC immediately by parse the NC code. In our country,many manufacturing enterprises demand for the simulation software because the NC codes are still edited by the manner of pure handwork or half-handwork partially.VRML has been intended to be the open standard of 3D interactive development environment of VR on Internet. The NC simulation system based on VRML is provided with open structure and fine expandability,the interactive operation of which is well adapted to different kinds of development environment based on Internet. This paper researches the executive plan of the NC simulation system based on VRML,which employ the 3D virtual reality scene of VRML as simulationenvironment and employ the network server as transfer station of simulation information to fulfill the work of NC simulation by the long-distance cooperation of clients. This paper has meet with success in the key technology of the NC simulation and the main content as follows.-The instance is the NC code of G-CNC6135 numerically controlled machine tool that belongs to Engineering Teaching Center of Sichuan University,and has acquired definite production through intense study. The content of the study is:1 This paper bring forward the creative thinking of general classification for modeling based on features which can describe the geometrical model of work piece and building the universal model repository for the objects of NC simulation depended on the modules of VRML. Then the software module for NC simulation is acquired through edits the codes of VRML language commingled with JavaScript,which can display accurate and interactive animation of simulation for the process of turning. In the instance of the NC simulation for G-CNC6135 numerically controlled machine tool from Engineering Teaching Center of Sichuan University,the simulation software module takes effect well and bears good adaptability and expandability.2 On the IIS of Windows operation system,we design the web service system for manufacturing enterprises in the miniature through the ASP and ADO technology,which is the transfer station and service desk of information for the client who edit the NC code and the client who carry our the simulating. The implementation technique of this web service system can easily be mastered and the system can be maintained conveniently and have good safety.3 Study the NC simulation system based on VRML for Internet application,which needn’t to rely on the expensive CAD/CAM software,and be able to achieve the share of machining simulation information and the integration of manufacturing resource conveniently between corporations and enterprises. Research and development on the simulation system can improve the production efficiency and processing capability of manufacturing enterprises,and make a firm foundation forimformatization and modernization in the field of manufacturing.更多还原