Summary
An experimental investigation, using high-speed cine photography, of the variation in rake-face friction and the length and inclination of the shear plane in orthogonal machining under regenerative chatter conditions. It is shown that fluctuations in the rake-face coefficient of friction are 180° out-of-phase with fluctuations in the length of the shear plane and with fluctuations in the toolface normal force. The coefficient of friction is approximately proportional to the toolface normal force, but the dependence of friction on normal force is considerably greater than that in steady-state cutting. The shear angle, which in steady-state cutting is approximately linearly related to the difference between friction angle and rake-angle, is shown to vary cyclically with this quantity under dynamic conditions. Differences between the steady-state and dynamic cutting processes are discussed and a model of the dynamic relationship between shear geometry and tool friction is presented. An important factor in dynamic cutting is the finite time required for the toolface stress distribution to reach its steady-state configuration.
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References
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© 1973 Macmillan Publishers Limited
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Stewart, V.A., Brown, R.H. (1973). The Interrelationship of Shear and Friction Processes in Machining Under Regenerative Chatter Conditions. In: Tobias, S.A., Koenigsberger, F. (eds) Proceedings of the Thirteenth International Machine Tool Design and Research Conference. Palgrave, London. https://doi.org/10.1007/978-1-349-01857-4_2
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DOI: https://doi.org/10.1007/978-1-349-01857-4_2
Publisher Name: Palgrave, London
Print ISBN: 978-1-349-01859-8
Online ISBN: 978-1-349-01857-4
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