Title: Polish-mirror finish surfaces obtained by high precision turning

Authors: Alexis Gautier, Hatem Khanfir, Philippe Revel, Rene-Yves Fillit

Addresses: Laboratoire Roberval (UMR 6253 – CNRS), Universite de Technologie de Compiegne, BP 649, Compiegne Cedex 60206, France. ' Laboratoire Roberval (UMR 6253 – CNRS), Universite de Technologie de Compiegne, BP 649, Compiegne Cedex 60206, France. ' Laboratoire Roberval (UMR 6253 – CNRS), Universite de Technologie de Compiegne, BP 649, Compiegne Cedex 60206, France. ' Laboratoire SMS (UMR 5146 – CNRS), Ecole Nationale Superieure des Mines de Saint Etienne, 158 cours Fauriel, Saint-Etienne Cedex 2 42023, France

Abstract: Frequently, strict conditions are imposed on dimensions and surface quality of manufactured products. For revolution parts, High Precision Turning (HPT) machine with Single-Crystal Diamond (SCD) tools allows to dispense with successive operations of surface finishing such as grinding and polishing to attain an arithmetic roughness amplitude (R_a) of 6 nm on an aluminium alloy (2017). High part of this roughness amplitude is due to the interaction between diamond tool and precipitates included in the alloy. On pure aluminium R_a drops to 4 nm. To characterise integrity of surfaces machined by a high precision machine, only grazing X-rays can measure structural modifications such as variations of lattice parameter and dislocation density down to 1 µm depth. Moreover, the association of a powerful machine, an autofocus sensor and a SCD tool allows to obtain various and precise/accurate geometric forms with polish-mirror surfaces.

Keywords: high precision machining; surface integrity; SCD tools; single-crystal diamond; aluminium; X-ray diffraction; form measurement; high precision turning; surface roughness; surface finish; mirror finish; surface quality.

DOI: 10.1504/IJMMM.2008.023190

International Journal of Machining and Machinability of Materials, 2008 Vol.4 No.2/3, pp.133 - 147

Published online: 13 Feb 2009 *

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