Research Of Synchronous Belt Transmission CAD System Based On UG

General computer-aided design CAD software is universal, which can not meet the needs of professional and special areas. Therefore, the secondary development of special system which uses common CAD software for the platform has become an important part of modern product design according to the specific needs of product design.Synchronous belt transmission is a transmission mode, which integrates the advantages of belt transmission, gear transmission and chain transmission. It is smooth, low noise, accurate, efficiency and don't need lubrication. At present, the application of synchronous belt transmission has been very extensive at home and abroad. It has become an important transmission part in automobile, textile machinery, office machinery, CNC machine tools and so on. But its design, calculation and modeling are rather tedious and difficult. Achieving synchronous belt transmission CAD system is a very important practical significance.According to the characteristics of synchronous belt transmission, alveolar is identified as the feature. The teeth and alveolars of pulley and belt are formed by boolean and array of alveolar feature. Alveolar feature is parameterized by relationship expression method. Synchronous transmission parameter standard series models are created through the integrated use of feature modeling and parametric design. The parameters of a seris of similar shape models are stored in the program. Designers can modify the series of model parameters and obtain the product model by UG interactive interface.Man-machine interface includes menu and system dialog. The main menu and three drop-down menus are created with UG/Open MenuScript. The system dialogs are customized with UG/Open UIStyler. Dynamic link library files (.DLL files) are generated by programming on VC++ platform with the use of UG/Open API. Then the dialogs mutual links and data transfer can be achieved.The realization of the system greatly reduces the complexity of the design process and the workload of the designer, improves the design efficiency, shortens the design cycle and lays the foundation for the computer-aided analysis, computer-aided manufacturing of the synchronous belt and pulley. The realization of this system also has some guidance and reference for other types of transmission.