Modular Design And Scheme Solving For A Type Of High-end CNC Machining Center And Their Application

With the development of the economics, customer requirments become more and more diversification and personalized, modular design is a design method that can meet its need, shorten the design cycle and reduce the cost of hign-end horizontal machining center. In order to be effective of hign-end horizontal machining center, module representation technique, module partion technique, module evaluation technique of hign-end horizontal machining center are researched in this paper. According to the product features and the company's actual needs of hign-end horizontal machining center, a software system about hign-end horizontal machining center modular design is developed.The main contents of this dissertation are as follows:The first chapter analyzes the characteristics and development of hign-end horizontal machining center. The research development of module representation technique, module design technique and module evaluation technique of hign-end horizontal machining center are introduced, then analyzes the shortage of existing modular design method and proposes the problem need to be addressed in a modular design and scheme solving techniques of high-end horizontal machining center. At last, the research content and structural frame are given.The second chapter researches module representation technique of hign-end horizontal machining center. Module hierarchical representation technique based on tabular layouts of article characteristics is presented. The properties of hign-end horizontal machining center are expressed by using TLAC, add functionality, performance, structure and other properties based on the geometry of parts, the module's representation is completed. Then uses the constraint rules between modules, the high-grade horizontal machining center product tree template is got. Finally, the example of horizontal machining-center module representation shows that the method is feasible.The third chapter researches module partion technique of hign-end horizontal machining center. Module partion technique based on improved NSGA-Ⅱalgorithm is presented. First introduced the process and principles of modular partion, then the property-driven partion guidelines are considered, the components correlation matrix is build and simplified. The preliminary planning modules of hign-end horizontal machining center based on fuzzy sets are dividen. An improved NSGA-II algorithm is employed to optimize multi-objective module and get the optimal solution set of module division plan. Finally, the example of horizontal machining-center module partition shows that the method is feasible.The forth chapter researches module evaluation technique of hign-end horizontal machining center. Module evaluation technique based on improved TOPSIS is presented. The evaluation criteria of hign-end horizontal machining center are determined. The weight of the evaluation criteria are decided based on the criteria weighting method. An improved TOPSIS is employed to evaluate and get the optimal module plan.The fifth chapter combines with the company's real demands and research results, a software system about hign-end horizontal machining center modular design is developed based on the theory and method discussed above. What's more, this system has been applied in machine tools design process. It reveals that the theory and methods mentioned above are feasible and practical.The sixth chapter summarizes the main research content and results of this subject, and the future research direction are given.