As the only basis for the manufacturing process

MBD model has gradually become the development trend of the aviation manufacturing industry

and it has been applied to the CAD/CAM system. However

MBD technology has not been used in the CAPP

which results in the poor information flow of the MBD data set during the integration of CAD/CAPP/CAM. In this paper

according to the requirements of NC machining of the aviation structure

the MBD NC machining process model is built based on layers. The work flow of NC machining process based on MBD is proposed. The CAPP system of NC machining based on MBD is researched and developed. The MBD application of integrated design and manufacture on UG platform is realized finally.