Study On Manufacturability Evaluation Of Tolerance And Cost-Tolerance Model Based On Manufacturing Resources

On the basis of comprehensive analysis for recent research status of computer-aided tolerancing, binding projects supported by National Natural Science Foundation of China (50275136) and Natural Science Foundation of Zhejiang (500115, 502016), the methods of manufacturability evaluation of tolerance and the cost-tolerance models based on manufacturing resources are studied.In chapter 1, the important role of computer-aided tolerancing in modern manufacture and research status on key theories and technologies of the region are summarized. The main contents and general structure scheme of this dissertation are given.In chapter 2, information model of manufacturing resources is studied. The object-oriented database of manufacturing resources is established. The database can supply the information that is needed in tolerance design.In chapter 3, the contents of the manufacturability evaluation of tolerance is analyzed, for example: the restriction of manufacturing equipments, the restriction of processing equipments, the restriction of processing technology and the restriction of labor resources. A useful manufacturability evaluation method of tolerance is presented.In chapter 4, existing cost-tolerance models are analyzed. A new cost-tolerance model, which closely links with real technological process, is built using fuzzy neural networks.In chapter 5, the key factors that influence the tolerance cost and its robustness are analyzed. A method of analyzing the robustness of the tolerance cost is presented. An example is studied to illustrate the method at last.In chapter 6, a prototype system of tolerance manufacturability evaluation based on manufacturing resources is presented on SolidWorks.In chapter 7, the important results and conclusions of the dissertation are summarized and the future research on compute-aided tolerancing is prospected.