Abstract: In the information transfer pattern based on design model,according to the requirements of information defining,transferring,and management in process design,the basic attributes of the process model which include definition of process information,expression of process design intent and the data carrier of process information are summarized.The related data of process design basis,process planning,detailed process designing,process file exporting,process approving and management in whole process design is formally defined by using the parameterization as the main way.Points out the five correlation mechanism of the process modeling in CAD system,and according to the integrated feature of the process model,designs two new correlation mechanisms which include the File Link and Capture/Resource Link.On the basis of parameterization and 3D annotation expression way in MBD technology,the way of geometric element references,capture link and file link is designed to enrich expression way in MBD technology.Finally,the design flow and instance of process model in integration environment of 3D CAPP are given.

Key words: Model Based Definition(MBD), process model, integrated modeling, parametric expression