Title: Development of a friction model for the tool-chip-workpiece interfaces during dry machining of AISI4142 steel with TiN coated carbide cutting tools

Authors: F. Zemzemi, J. Rech, W. Ben Salem, A. Dogui, P. Kapsa

Addresses: LTDS, Ecole Nationale d'Ingenieurs de Saint-Etienne, 58 rue Jean Parot, Saint-Etienne 42000, France. ' LTDS, Ecole Nationale d'Ingenieurs de Saint-Etienne, 58 rue Jean Parot, Saint-Etienne 42000, France. ' LGM, Ecole Nationale d'Ingenieurs de Monastir Avenue Ibn Al-Jazzar, Monastir 5019, Tunisia. ' LGM, Ecole Nationale d'Ingenieurs de Monastir Avenue Ibn Al-Jazzar, Monastir 5019, Tunisia. ' LTDS, Ecole Centrale de Lyon, 36 avenue Guy de Collongue, Ecully cedex 69134, France

Abstract: This work deals with the identification of a new friction model for high speed dry cutting of AISI4142 steel with TiN coated carbide tools. Both experimental and numerical studies were used to find the relationship between friction coefficient, sliding velocity, contact pressure and contact temperature. A tribometer, based on a plane-sphere contact configuration, has been developed to reach extreme contact conditions similar to the ones occurring during metal cutting. The apparent friction coefficient, provided by the ratio between the tangential and normal forces, is measured. It is assumed that this coefficient can be divided into two components: an adhesive coefficient and a plastic deformation coefficient. The proportion of each component is investigated by means of a numerical model simulating the friction of a sphere with similar contact conditions.

Keywords: friction modelling; adhesion; numerical simulation; metal cutting; tool-chip-workpiece interfaces; dry machining; steel cutting; titanium nitride; coated carbide tools; cutting tools; high speed machining; friction coefficient; sliding velocity; contact pressure; contact temperature.

DOI: 10.1504/IJMMM.2007.015472

International Journal of Machining and Machinability of Materials, 2007 Vol.2 No.3/4, pp.361 - 377

Published online: 19 Oct 2007 *

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