Research on the dynamic mechanical characteristics and turning tool life under the conditions of excessively heavy-duty turning

Abstract

The dynamic mechanical characteristics of excessively heavy-duty cutting were analyzed based on the cutting experiments with 2.25Cr-1Mo-0.25V steel used in hydrogenated cylindrical shells. By investigating the influence of dynamic mechanical characteristics on the tools’ failure in limited heavy-duty cutting processes, the model of dynamic shearing force in the cutting area was established. However, the experimental results showed that the dynamic shear flow stress in the cutting area greatly influenced the tools’ fatigue. The heavy-duty cutting tool was damaged in the form of a shearing fracture. Through a comprehensive analysis of the theory, the critical condition of the tools’ fracture under extreme loading was established.

Keywords

extreme loading cutting / shear flow stress / dynamic cutting force / fatigue fracture

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Acknowledgements

This research was supported by the National Natural Science Foundation of China (Grant No. 51175131) and the National High Technology Research and Development Program (No. 2009AA044302).

RIGHTS & PERMISSIONS

2014 Higher Education Press and Springer-Verlag Berlin Heidelberg