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Abstract
The Oxley machining theory which allows for the high strain-rate/high temperature flow stress and thermal properties of the work materials has so far mainly being applied for predicting forces, etc. in turning. This paper describes recent work that involves extending the above theory for making machining predictions for an internal operation (boring) and intermittent process (reaming). In addition to the comparisons made between predicted and experimental (boring test) results comparisons were also made between experimental boring and turning forces. The latter results show that, under identical conditions, forces in turning are slightly higher than those in boring with the predicted and experimental results showing good agreement. For reaming, the comparison of the predicted and experimental cutting torque and thrust results also show good agreement with the correct trends being predicted when the Oxley machining theory is used with certain simplifying assumptions. The Oxley machining theory which is based on continuum mechanics and variable material flow stress can successfully be used to predict machining parameters for different material removal processes.
ACKNOWLEDGMENTS
The authors gratefully acknowledge the valuable help rendered by the late Professor P.L.B. Oxley during the course of this work. They also wish to thank Mr G. Schubert and Mr R. Montgomery for their help during experiments, BHP (Long Products Division in Newcastle) for providing some of the steels and the Australian Research Council for financial support.