Energy dissipation in modulation assisted machining

Yeung, Ho and Sundaram, Narayan K and Mann, James B and Compton, W Dale and Chandrasekar, Srinivasan (2013) Energy dissipation in modulation assisted machining. In: INTERNATIONAL JOURNAL OF MACHINE TOOLS & MANUFACTURE, 74 . pp. 41-49.

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Abstract

The specific energy in modulation assisted machining (MAM) - machining with superimposed low frequency ( < 1000 Hz) modulation in the feed direction - is estimated from direct measurements of cutting forces. Reductions of up to 70% in the energy are observed relative to that in conventional machining, when cutting ductile metals such as copper and Al 6061T6. Evidence based on chip structures and strains, stored energy of cold work, recrystallization, and finite element simulation of chip formation, is presented to show that this reduction is due to smaller strain levels in chips created by MAM. A simple geometric ratio of the length to thickness of the `undeformed chip', which can be estimated a priori from MAM and machining parameters, is shown to be a predictor of the transient chip formation conditions that result in the reduction in specific energy and deformation levels. (C) 2013 Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Publication:	INTERNATIONAL JOURNAL OF MACHINE TOOLS & MANUFACTURE
Publisher:	ELSEVIER SCI LTD
Additional Information:	Copy right for this article belongs to the ELSEVIER SCI LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
Keywords:	Modulation; Transient; Energy; Strain; MAM; Simulation
Department/Centre:	Division of Mechanical Sciences > Civil Engineering Division of Mechanical Sciences > Mechanical Engineering
Date Deposited:	20 Jul 2016 09:21
Last Modified:	20 Jul 2016 09:21
URI:	http://eprints.iisc.ac.in/id/eprint/54243

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