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Proceedings Paper

Algorithms and contact mechanics models for ultraform finishing (UFF)
Author(s): Christophe Bouvier; Sheryl M. Gracewski; Stephen J. Burns
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Paper Abstract

UltraForm Finishing (UFF) is a new deterministic subaperture computer numerically controlled (CNC) polisher. Because UFF uses a compliant tool, the desired depth of removal is achieved by adjusting the tool crossfeed velocity. Algorithms for determining an optimum crossfeed velocity profile that satisfies tool velocity and acceleration constraints have been derived for flats, spheres, and mild aspheres. The solutions were validated experimentally. The removal function that characterizes the interaction between a particular tool and part material is evaluated by making a removal spot for one set of process parameters. Its variations, as a function of the process parameters, are predicted by using Hertz contact theory and the Preston equation. Additional algorithms were developed for the evaluation of part and spot metrology inputs and for tool path generation to prevent tool-part collisions.

Paper Details

Date Published: 14 May 2007
PDF: 4 pages
Proc. SPIE TD04, Optifab 2007: Technical Digest, TD040C (14 May 2007); doi: 10.1117/12.719036
Show Author Affiliations
Christophe Bouvier, Univ. of Rochester (United States)
Sheryl M. Gracewski, Univ. of Rochester (United States)
Stephen J. Burns, Univ. of Rochester (United States)


Published in SPIE Proceedings Vol. TD04:
Optifab 2007: Technical Digest
James J. Kumler; Matthias Pfaff, Editor(s)

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