Title: Tool wear modelling for constant removal rate in two-bodies automated polishing

Authors: Yann Quinsat; Anthony Guiot; Christophe Tournier

Addresses: LURPA, ENS Cachan, Univ Paris Sud, Université Paris-Saclay, 61 avenue du président Wilson, F-94235 Cachan, France ' LURPA, ENS Cachan, Univ Paris Sud, Université Paris-Saclay, 61 avenue du président Wilson, F-94235 Cachan, France ' LURPA, ENS Cachan, Univ Paris Sud, Université Paris-Saclay, 61 avenue du président Wilson, F-94235 Cachan, France

Abstract: Complex shapes such as medical implants or injection moulds require the use of super-finishing operations to minimise geometrical defects, down to mirror effect finish. These pre-polishing and polishing operations are still regularly performed manually by skilled workers. In spite of advantages in terms of repeatability, productivity and geometrical quality, automatic polishing methods are not widely used because they require systematic and significant developments. One of the main issues is the modification of the abrasive tool efficiency during the process. It evolves over time due to abrasive grains tearing and transfers onto the abrasive tool surface of workpiece microchips. Thus a model of tool wear is proposed and compensation strategies are elaborated to ensure a constant material removal rate on the surface. Compensations are performed by optimising the spindle speed and/or the feedrate along the tool path and are validated through experimental investigations.

Keywords: automatic polishing; tool wear; material removal rate; constant MRR; feedrate compensation; 5-axis machining; wear modelling; abrasive tools; tool efficiency; optimisation; spindle speed.

DOI: 10.1504/IJAT.2015.073803

International Journal of Abrasive Technology, 2015 Vol.7 No.2, pp.73 - 89

Available online: 18 Dec 2015 *

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