Based On Web-blanking Die Cad / Cam Systems Research And Development

The punching technique occupies the very important position in modern industry produce, which is an indispensable process method in both military and public industry. The punching die is the key of the continuous development of punching technique and the indispensable furnish. With the high development speed of the information technique, The CAD/CAM system with the function of collaborative design with many people is needed in the development of the molding tools, which can shorten the molding tool development period, make use of the resources well, and simplify the maintenance and management. However, the CAD/CAM systems about punching die that developed these days mostly are the stand-alone edition which already can't satisfy the development of CIM technique. This article developed the Web-based CAD/CAM system of punching die——The WebCPD, which combined the Web technique and the CAD/CAM technique. The main research contents are as follows:On the ground of the research about the three kinds of distribute system structure which are the Terminal/Mainframe, the Client/Server and the Browser/Server, this article analyzes the construction and characteristics of the three kinds of distribute type application technique model (CORBA, J2EE and Windows DNA) aim at Web-based distribute type system development. The system is analyzed with the UML according to the needs of the WebCPD system. The modules are plot out, and their functions are described, too. The organization and frame of the system is confirmed, and the system is configured, too.The modules of the Server are developed with the technique of COM in the environment of Visual C++. The database system is analyzed and summarily designed by using the E-R model, and is logic designed according to SQL Server. And the database can be operated by using the ADO technique. The Web interfaces are designed by using the tool of Dreamweaver and with the technique of HTML and ASP.This article proposes a new method of building the punching die's assembly drawing based on the knowledge tree, which has solved the problem that it is difficult to express the position and figuration of the male dies and female dies when too many female dies are sheltered from each other. The problem hasn't being solved in the former punching die CAD/CAM system. The method makes the expression of parts in the assembly drawing more clearly and reasonable. Meanwhile, the efficiency of the assembly drawing building is improved by using the parameterized drawing building method and the combined blanking algorithm.This article proposes a new method of calculating and labeling the cutting edge dimension of the punching die. This method match the graph entity and the dimension of the pinching part, judge the type of dimension wear automatically, and carry out the automatization of the calculating and labeling about the cutting edge dimension of the punching die.