Title: Investigation of the material removal model for bonnet tool polishing with precession

Authors: D.G. Xie, B. Gao, Y.X. Yao, Z.J. Yuan

Addresses: School of Mechanical and Electrical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang Province 150001, China. ' Beijing Institute of Graphic Communication, Beijing 102600, China. ' School of Mechanical and Electrical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang Province 150001, China. ' School of Mechanical and Electrical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang Province 150001, China

Abstract: Bonnet tool polishing is a novel aspherical polishing method. This paper describes a method to obtain the local removal rate for the polishing process by using bulbous flexible membrane covered with a polishing pad and pressurised by an internal fluid. During the polishing process the precession process, in which the bonnet tool cannot only spines itself but also precesses along the local normal on the specimen surface, was applied. The local removal rate model was established according to the Preston equation. The influence of the precession process on the material removal rate was analysed and also the polishing pressure distribution was obtained according to the experiment data. It is confirmed by the experiments that the dwelling time has a linear relation with the local removal depth. Preston coefficient can be calculated from the experimental data. Finally, the expression of the local removal rate in bonnet tool polishing was acquired experimentally.

Keywords: bonnet tool polishing; local removal rate; precession movement; Preston equation; aspherical polishing; material removal rate; polishing pressure distribution.

DOI: 10.1504/IJCAT.2007.015258

International Journal of Computer Applications in Technology, 2007 Vol.29 No.2/3/4, pp.178 - 181

Published online: 30 Sep 2007 *

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