Research On Rolling Technology And CAD For Ring With Stepped Cross Section

Ring rolling is a progressive partial plastic forming technology, which is of many characteristics such as saving forming force and production cost, increasing utilization ratio of energy and material, rising productivity, widening processing range of ring products etc. As a result, ring rolling has become the main manufacturing method of many kinds of superior seamless ring parts.The lack of a comprehensive design project limits ring rolling implementation and application in current practical manufacture. The influence of blank design which is lack of specific design method on the rolling quality of ring with stepped cross section and ring with rectangle cross section is obvious. The problems such as blank design, ring rolling groove design, technological parameter design need to be solved during the rolling of ring with stepped cross section and ring with rectangle cross section.At present, computer aided design software for ring rolling design is applied in few companies instead manual design method is still adopt in most domestic companies. The research and development of ring rolling design system has been badly behind with requirement of practical production, which has seriously held back the development and application of ring rolling technology and retarded improvement of ring rolling design quality and productivity.The study in the dissertation has introduced ring rolling design process and elaborated ring rolling groove design and technological parameter design in accordance with features of ring rolling production and application. The blank design method for ring with rectangle cross section is derived based on the ring rolling theory and practical experience.The theory and method of ring rolling design system have been made a deep study based on detailed analysis of ring rolling design feature and CAD research status quo of domestic and foreign ring rolling in this paper. Through analyzing the problems facing current CAD system, the design method for mass customization is discussed. The connotation of design for mass customization, design effect and process, are introduced base on above in detail, and design theory for ring rolling design system are given in this paper. The primary demand for this system, primary architecture, data flow chart, functional structure, and design process are analyzed and introduced in detailed.Through studying blank design method for ring with rectangle cross section by bisection algorithm, the bisection algorithm routine which is realized. The ringrolling design system including menu design, dialog box design and main functional module design is developed. A rolling design example of application for ring with rectangle cross section is finally given.The results of research are summarized, and the research trend of ring rolling design system is analyzed. Through integrating modules of design system, CAD/CAM/CAE integration for ring rolling, establishment of expert systems, the design system will more adapt the development of ring rolling technology and supply the needs of intelligentization, integration, standardization for ring rolling design.