Intelligent control of surface quality in super-finish grinding by utilizing WattPilote

As the intelligent grinding machine is required for high-precision grinding, a monitoring system is developed to control the surface quality of nozzle injector, which is stainless steel (DSUS70DH), for automotive combustion engine in super-finish grinding process by utilizing WattPilote to detect the in-process power signals. The in-process control limits of surface finish are determined referring to the experimentally obtained results by examining the maximum and minimum power signals under various samples. The new algorithm is proposed to identify and compare the obtained power signals by WattPilote during the in-process super-finish grinding. The experimentally obtained upper and lower control limits have been proved and verified with the new super-finish grinding tests. It is confirmed that the developed system can be used to monitor and check the quality of the surface finish of nozzle injectors during the super-finish grinding process with high accuracy regardless of grinding conditions. However, the in-process prediction model of surface finish, which can forecast the surface roughness of nozzle injector during high-precision grinding, will be executed in further research work.