Optimization of the machining economics problem under the periodic control strategy

This paper presents a model for calculating the optimal cutting feed rate, spindle speed, and periodic control interval for a standalone cutting machine. The optimal cutting conditions are determined for the maximum expected 'profit rate' criterion, under the assumption that the Normal distribution function represents the tool-life distribution. When the cutting operation and the load/unload process are preformed automatically without any supervisor, it is not necessary to employ a full-time operator for the machine. Thus, we used the Periodic Control Strategy, under which the operator attends to the cutting machine only at predefined calendar times. We have developed an approximate model that was studied using simulations. The model appears to be very efficient.