Edge effects with the Preston equation

Esteban Luna-Aguilar; Alberto Cordero-Davila; Jorge Gonzalez; Manuel Nunez-Alfonso; Victor Cabrera; Carlos I. Robledo-Sanchez; Jorge Cuautle-Cortez; Maria H. Pedrayes

doi:10.1117/12.459869

30 January 2003 Edge effects with Preston equation

Esteban Luna-Aguilar, Alberto Cordero-Davila, Jorge Gonzalez, Manuel Nunez-Alfonso, Victor Cabrera, Carlos I. Robledo-Sanchez, Jorge Cuautle-Cortez, Maria H. Pedrayes

Author Affiliations +

Proceedings Volume 4840, Future Giant Telescopes; (2003) https://doi.org/10.1117/12.459869
Event: Astronomical Telescopes and Instrumentation, 2002, Waikoloa, Hawai'i, United States

Abstract

In the polishing process, the wear tends to be greater when the tool extends beyond the edge of the workpiece. A linear pressure distribution (between the tool and the workpiece) has been used to explain this effect, however, this model also can predict negative pressures. This could mean that material is deposited instead of being removed. We present a new pressure distribution proposal, which presents like a skin effect. This means that the pressure is significantly higher at the border points than at internal points of the glass. With this model the material removal at the border points is increased considerably since, according to Preston, the wear is proportional to the pressure. This pressure distribution model is applied to calculate the wear produced by a square tool on a glass border moving along straight lines.

Citation Download Citation

Esteban Luna-Aguilar, Alberto Cordero-Davila, Jorge Gonzalez, Manuel Nunez-Alfonso, Victor Cabrera, Carlos I. Robledo-Sanchez, Jorge Cuautle-Cortez, and Maria H. Pedrayes "Edge effects with Preston equation", Proc. SPIE 4840, Future Giant Telescopes, (30 January 2003); https://doi.org/10.1117/12.459869

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