Diagnosis and Optimisation of the Internal Grinding Process by Means of an AMB High Speed Spindle

This article focuses on the improvement of the performance of the internal grinding process by using Active Magnetic Bearings (AMBs) as sensor and actuator. The grinding process with its requirements is described and the possible measures to improve the process are shown in general. The signals available from the AMBs and from that the derivable quantities are described. Furthermore the possibilities of the AMBs as actuator for the process are presented. The process normal force is the essential characterising quantity to evaluate the process. Therefore the determination of the process force out of the displacement and current signals of the AMBs is discussed in more detail. Finally experimental results are presented, for instants showing the dressing and the first cut detection