外文翻译--基于网络的虚拟数控车削系统研究-数控设计(编辑修改稿)

外文翻译--基于网络的虚拟数控车削系统研究-数控设计(编辑修改稿)内容摘要：

any VM systems are designed only for specific problems in particular conditions. There is no one VM application that having all the technologies, which are necessary to setup a real machining process. Secondly, each process of modelling a new VM system is like to the rework of the same the geometrical modelling of a machine, the analytical modelling of machining parameters, such as the cutting force, also has to be developed for every specific task. Lastly, various VM systems are developed with different programming and modelling languages, which makes them less flexible and scalable owing to inpatibility interface. Any change in one part would require the whole system to be modified As the same time, with the rapid development of Inter and related technologies, we can realize remote manufacturing and work manufacturing. Once a VM system is constructed, it can be used for many purposes: designing a shopfloor layout, estimating control strategies, scheduling, testing control programs, simulating operations in the factory, virtually operating a NC machine at local or on remote, verifying control mands, avoiding collisions in machining, predicting tool life, training operators, etc. Therefore, we presented the research of wedbased virtual NC turning system. In order to make the research work have pertinence, we had selected the NC turning as the research objects, bring forward the wedbased virtual NC turning system architecture and analyze the acplishment and theory. 2. SYSTEM ARCHiTECTURE OF THE WEBBASED ViRTUAL NC TURNING SYSTEM A VM system must simulate a large number of machining rules and theories, as well as simulate plex machining processes. The system architecture must include wellorganized modules for modelling and simulation, and welldefined interfaces to facilitate group work to produce and reuse patible and platformindependent applications. From this viewpoint, the system has been selected to construct an open and modularized VM system. The essential modules of the developed webbased virtual NC turning system are shown in Fig. 1. Resource support system In order to provide users with sufficient information for reuse, a set of public databases, including a virtual machine library, a virtual cutting tool library, a virtual fixture library, and a material library, are necessary to serve a plete VM system. The virtual machine library includes various types of machine models with geometrical features, degrees of freedom, and the physical constraints of the various part movements. The virtual cutting tool library includes cutter materials and geometrical features such as work length and diameter. The material library includes physical and mechanical properties such as strength and elasticity. In addition, a customized database is also required to store temporary and applicationspecific data files. NC controller T。