Prof. Saber Mahmoud Abdrabbo :: Publications:

ABSTRACT The need for new and more reliable tool wear sensors for metal cutting has become a necessity. In this context, and based on a computer monitoring technique an online method for the prediction and estimation of tool wear was developed using the vibration measurement and analysis of the tool during turning. The vibration results from rubbing conditions between the tool and the machined workpiece surface. It was observed that the vibration level increased with the increase of tool wear land width. A slight vibration level variations due to the effect of the cutting conditions was also observed. From the results obtained an empirical formula was formulated. This formula can be used for the prediction and estimation of tool wear from the online vibration level measurement. Multi layer Neural Network (MNN) system with back propagation algorithm has been developed and used for cutting tool wear monitoring based on the measurement of the tool vibration level of the tool. The results of the Neural Network showed close matching between the model output and the directly measured flank wear, both results are quite successful but the trained data accuracy shows a small scatter relative to the measured data. The measured and estimated values of the tool wear using the empirical formula and Neural Network were in agreement with a maximum deviation of less than 10%.