Study on Framework of STEP-NC Controller with On-machine Inspection

On-Machine Inspection (OMI) is an effective way in NC machining processes to improve the quality of machined parts and reduce assistant machining time. In this paper, STEP-NC (ISO 14649) data model is introduced to the integration of NC machining and On-machine Inspection in order for Closed-loop Machining. First a STEP-NC Controller with OMI to realize integrated machining and inspection of parts is proposed, along with its architecture, functional modules and working procedure. Then the implementation method of such a system on Java platform is presented, and preliminary modules are developed including the interpreter, machining simulation and probing simulation. A case study of an example part is also provided focusing on the integration of the machining and the probing processes, which demonstrates the feasibility of the proposed STEP-NC Controller with OMI.