Title: Imposing compliance on grinding and polishing

Authors: C.H. Liu, C-C.A. Chen, Po-I Li, Ta-Chieh Hu

Addresses: Department of Mechanical and Electro-mechanical Engineering, Tamkang University, Tamsui, Taipei County 251, Taiwan. ' Department of Mechanical Engineering, National Taiwan University of Science and Technology, #43, Sec.4, Keelung Rd., Taipei 106, Taiwan. ' Branchy Technology Co., Ltd., 171 TienTsen St., PingJen City, Taoyuan Shien 324, Taiwan. ' Department of Mechanical Engineering, Chung Cheng Institute of Technology, National Defence University, Ta-Hsi, Tao-Yuan 335, Taiwan

Abstract: Compliance is imposed upon the workpiece holder of a polishing/grinding system. Experiment results show that in a polishing process compliance may compensate position and geometry errors of the workpiece, and also compensate errors due to tool wear. During a grinding process it is shown that compliance may absorb high frequency disturbance from the outside, making grinding results unaffected. For a polishing system with compliance, experiment results suggest that soft springs (i.e. springs with greater values of compliance) may compensate workpiece geometry error better. Also, surface roughness decrease with increasing either translational or rotation speed of the polishing ring, and, up to a limit, a smaller pre-load depth gives rise to a smoother surface. A series of experiments based on Taguchi|s method for parameter design are performed to determine better combinations of compliance with other polishing parameters, and results show that surface roughness may be greatly reduced.

Keywords: polishing; grinding; mould and die; process compliance; error compensation; tool wear; position errors; geometry errors; surface roughness; Taguchi methods; parameter design.

DOI: 10.1504/IJMPT.2005.006457

International Journal of Materials and Product Technology, 2005 Vol.22 No.4, pp.274 - 288

Published online: 10 Mar 2005 *

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