Modeling Theory, Method And Application Of Product Life-cycle Information

With the forming of the global market and the rapid development of information, communication, biology and material, great changes have taken place in manufacturing externals. Quick delivery and rapid responds to market have been the key to market competition. In order to meet intending challenge, many scholars have put forward various product developing strategies, produce modes and advanced manufacture technologies. Although problems are considered in different views in the new philosophy and the new mode, their research area is entire life cycle of product. It is emphasized information integration, function integration, process integration, uniform resource environment. It is required that product information involved in various product life-cycle activities be defined and described uniformly so as to realize information sharing of product life-cycle information.The structure of product life-cycle information model and the key techniques of modeling are lucubrated. It has been applied to the research and the development of "Furniture Series Product Computer Aided Design System" --CAD's application project of the Heilongjiang province. The main contents are the following:1. On the basis of analyzing and summarizing the result of product modeling, The theory and the method of product information modeling are researched systemically. The product life-cycle information model is created and its three level hiberarchy is shown as control level,core level and applying level. It is introduced in detail that Product master model based on STEP and the modeling method of the product developing process model and the applied models. 2. Some key techniques of product modeling are studied in detail. Firstly, three methods of data exchange are summarized and the public-database-to-be is put forward aiming at actuality. Secondly, the bidirectional mapping technology between the product master model and the applied model has realized the exchange of information among applied models on the basis of guaranteeing information consistency and integrality. Lastly, product modeling method based on drawing cell object are presented,In which method,the drawing cell is the basic unit of product modeling and it guarantees a good information heredity and variability. 3. Some problems in the product model of CAD are given, for example, no integration, without supporting all design process and Top-Down design. To overcome this problem, the study proposed that the product design model is composed of theconcept design model, the assembly design model and the part design model. All these modes have been established by EXPRESS-G. 4. The furniture product mode is established orienting furniture enterprise. We introduced the idea of design and general structure of plank furniture CAD system under the direction of the furniture product model and the realizing of design integration about furniture shaping, structure, engineering drawing and material statistics.