Research On Theory, Methodology And Application Of Adaptable Dynamic Design Of Machine Tools Structures For Product Family

Under the support of the National 863 Program and enterprise research program, taking CNC spiral bevel gear cutting machine tools series products as an example theory and methodology of adaptable dynamic design of machine tools structures are researched by the numbers, design tools and realization technology are also presented.On the basis of the study on adaptable design , the conception of adaptable dynamic design is defined. Mathematics model of adaptable dynamic design is founded. Quantification analytical tools of adaptable dynamic design are established. The evaluation principles for structure capability and chosen rules for structure project are put forward. The process of technology of adaptable dynamic design is analyzed.On the basis of market requirement analysis for CNC spiral bevel gear cutting machine, the customer requirement models are founded including the foundation of customer requirement matrix, the quantity expression of connection among customers and the corresponding relation between customer colony and subdivision product. The model of layout and design for product platform is established which including the layout matrix for product series, the function module matrix and the structure module matrix. On the basis of series layout matrix the product platform for each kind of structure is designed according as definite rules and methods.Methods of function analysis and function solution are indicated by using principle and method of KBE(Knowledge Based Engineering). The decomposition tree of function arrangement and mapped matrix between function and principle are established. The formulation of movement function and product platform and generalized structure model are founded for CNC spiral bevel gear cutting machine. A sort of modified method for FEM model is proposed and structure capability characteristic of machine tools series product is obtained by structure capability analysis using FEM calculation and test analysis.Using quantification analysis tools, the course of adaptable dynamic design for machine tools is analyzed. Adaptability is calculated and quantification estimation level of difficulty is indicated for each project in the design phase , which provided an effective guide for design process of machine tools structures. The comprehensive evaluation indices for product adaptability are put forward, in this basis the comprehensive evaluation model for product adaptability is given. According to primary evaluation results for product function adaptability etc evaluation indices secondary evaluation are put up using multilevel fuzzy integration evaluation methods, and the grade of adaptability integration evaluation of one CNC spiral bevel gear cutting machine is obtained, thereby guidance and modified foundation are afforded for more improvement of product design.Using exploiture methods of software prototype system based component technology, the software prototype system for adaptable dynamic design of machine tools structures to product family has been developed. The databases of product technology platform including structure module and capability parameter and reusable parameter in different design region and so on for YH60 series machine tools are established.The above research results make it richer of adaptable design theories, and the gap between adaptable design theory and practice has been filled. The software prototype system which has a better practicality can effectively improve the rapid innovation design capabilities for new product. This research has been successfully used in enterprises, and has yielded remarkable social and economic benefits.