For Modern Manufacturing Of Cad / Cam Applications

CAD/CAM is a complicated and systemic engineering ,which relates to many fields such as computer Science and Engineering, computational mathematics, CG, data structure, DB, simulation, NC, robot , Al, professional knowledge relating to design and manufacture, and so on. The manufacture and design process is developing toward automatic, integrative, intelligent, virtual and network direction due to the widely use of CAD/CAM in mechanical manufacture industry.In this paper, focused on the system of CAD/CAM for NC milling engraving, the technology of CAD/CAM is researched, especially the design, implement and key technology of CAD/CAM. Then, the design and development of the CAD/CAM system about NC milling engraving is discussed. Finally, the open issues that need to be researched about NCAD and manufacture is pointed out.The paper can be divided into three segments:In first segment, the CAD/CAM system is studied. The framework, main task, the procedure of design and the principle of CAD/CAM software is introduced. Then the key technology of CAD/CAM software such as geometry modeling, FEA, Optimized Design, NC programming is discussed to make sufficient theory basis for the design of a concrete CAD/CAM system.In second part, the design, implement and key issues of the CAD/CAM software for NC milling engraving are investigated. According to the requirement of the project, the whole system is divided into several modules. The detailed function, the means and instance of each module in the project are explained. Further more, the principle and process of the NC technology are discussed. Finally, the tool path creating, editing and verification.In the last segment, the NCAD and the manufacturing mode in the near future are investigated based on the trend of the CAD and the manufacturing mode. The CSCW which is an important technology for the NCAD , the primary character and the trend of manufacture mode in 21s and the relation of them are researched.The paper discussed the CAD/CAM technology from the theory, the implement and the evolution, which are of great value for other software design and development.