Dynamic speed adjustment of a machine tool

We present analytical results related to a tool management model for a flexible machine equipped with a tool magazine, variable cutting speed, and sensors to monitor tool wear, when tool life due to flank wear is stochastic. Under some regularity conditions, we derive the special structure of decision rules for adjusting the cutting speed as a function of remaining distance, each time a tool change occurs, in order to minimize the expected processing time (sum of cutting time and tool setup time). These are near-optimal and easy to compute.