The Research Of Integration Methodology Based On STEP And Feature

With the development of advanced manufacturing technology , CAD and CAPP have been achieved quite great progress in itself area , but the integration of CAD and C APP is one of the difficulties in the CIMS and it prevents the development of CIMS. The effective integration of CAD and CAPP system is necessary to the development of manufacturing enterprises. The development of STEP and feature technology brings forward a new method for the integration system. The STEP puts forward neutral machanism which doesn't depend on any system and can describe product model information for life cycle engineering which the integration system based on. The feature mapping technology advance the actively method for integration.With the research of the project "the development of numerical process planning integration platform faced the agility manufacture",which is sponsored by Sichuan Pro vice, the integration scheme of CAD and CAPP system based on STEP is put forward by use of feature mapping. The theory of feature mapping is analyzed in detail. The functional model of applied information is created and the design of data access interface is designed in detail in this dissertation. Complex mapping scheme which relied on straight and non-staight feature mapping is brought forward. The change of the fasion of feature organization and the creation of STEP neutral files in the feature mapping postposition are analysed. The overall truss of integration system is created on the basis of analysis of STEP.The system adopts Pro/E software to generate part sculpt and add feature of procee plan to generate part feature model. It realizes the feature mapping from design feature to manufacturing feature. The method of process plan files from the manufacturing feature files is discussed. Finally, it realizes the creation of part feature and manufacturing feature with a paradigm of ladder axis and it provide the base for the effective integration of CAD/CAPP system.