Research And Development On NC Simulation System Based On VRML

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.