The Technique Of Product Configuration Management Based On STEP/PDM Schema

Information exchange and sharing between heterogeneous systems are very important for system integration in manufacturing area. The modeling technique and application technique on PDM of STEP standards are studied in this dissertation. The product information model based on STEP/PDMschema is discussed. This model is the intersection of CAD/CAPP/CAE/CAM on PDM. Used by the technique, the issues of the data exchange and sharing of product data management between CAx and PDM or between PDM and PDM will be resolved with high efficiency.The function, application of standards and development tendency of PDM are introduced, the significance, contents and technical line are given in chapter 1.In chapter 2, the characteristics, the principle, the constitution of the STEP standards are introduced. The EXPRESS language and SDAI is explained in this chapter. The AP203 and PDMschema application protocols are briefly stated.In chapter 3, the technique of schema mapping between different STEP application protocols is discussed. The significance of schema mapping between STEP application protocols is stated. It is difficult to implement for schema mapping between different STEP application protocols through EXRESS-X language that are guided by STEP. Lastly,the quantity of application protocols in common use is not too much and the application protocols are integrated in actual manufacturing fields. A practical mapping method is studied to perform the mapping between AP203 and PDMschema.In chapter 4, the product information model on STEP/PDMschema is discussed in detail.In chapter 5, the realization technique of product configuration management based on STEP/PDMschema is discussed. In this paper, the principle of development of the product configuration management for concept design of products is introduced in detail.In chapter 6, the function of the developed product configuration management system based on STEP/PDMschema is shown.Finally, chapter 7 summarizes the fruits of the whole study, and gives the prospects for the tendency of the reaserch.