Off-line adaptive optimization of CNC lathe turning

This paper discusses the results obtained from a micro-computer program SIMTUP developed at the National University of Singapore for off-line adaptive optimization of a multi-pass CNC lathe-turning process. An initial estimation based on empirical models is conducted to obtain the total amount of time, cost and resources required for production. These models are to be updated with a view to arriving at new optimal cutting conditions with respect to production time. The optimal cutting conditions are based on the minimum production cost change with respect to production time for a dynamic system, a principle taken into account in SIMTUP. Estimations can be conducted at any stage to re-evaluate the total resources required. The results obtained can be used as effective productivity improvement tools for project management and quality control.