Design and Realization of NC Graphic Programming System

A graphical programming system fit for on-site processing is suggested for Computer Numerical Control (CNC) milling machine. Contour information is got through the graphic input module or reading Drawing Exchange File (DXF) file provided by CAD system. After sequencing the graphic elements and interpolation fitting of the non-circular curve by mathematical processing module, and calling the NC programming module with appropriate process parameters, we could generate NC codes automatically. If needed, the simulation module could display tool path dynamically. This system is applied to Lantian series numerical control system successfully in National Engineering Research Center for High-End CNC. It achieves the integration and share of design and process.