Introduction

Turning, drilling, milling and grinding are material removal processes widely used in many industrial sectors

In some of them, such as the car or the aerospace industry, the geometrical accuracy and surface finish requirements have been strongly increased in recent years

To meet these new needs, conventional machine tools have been replaced by numerical control machine tools (NCMT) to eliminate the variability introduced by the operator and to obtain better quality parts

In order to increase productivity and reduce manufacturing costs, NCMT have been associated with other components, mainly robots and computers, in flexible and computer-integrated manufacturing systems able to operate automatically during long periods of time

This advanced manufacturing systems demand an optimal performance at all machining stages

Are included just in time tool change when the tool has reached a certain wear level