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Proceedings Paper

Dragging force and astigmatic surface in commercial polishing machines
Author(s): Gildardo Pablo Lemus-Alonso; Alberto Cordero-Dávila; Rafael Izazaga-Pérez
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Paper Abstract

It is well known that astigmatic surfaces are obtained when surfaces are polished in commercial polishing machines, which are designed to produce surfaces of revolution. The authors of this paper do not know an explanation for this result. In order to understand why the wear is a function of the angular position on the glass, we measured the dragging force applied from a rotating glass to a small fixed tool of Teflon®. These experiments were done for several tool radial positions by using a table travel X-Y. With the aid of a force sensor dragging force as a function of the time was measured. We found that dragging force is a periodic function with fundamental frequency equal to the angular velocity of the glass, indicating that there is more wear on one glass angular position than another. We also found that this result is independent of the radial position of the tool. We used a polisher concentration of 20 degrees Baumé which is recommended by the supplier. And the amount of polisher per time and area units, dragged by the tool, remained constant for each one of the radial positions of the tool.

Paper Details

Date Published: 25 October 2011
PDF: 6 pages
Proc. SPIE 8011, 22nd Congress of the International Commission for Optics: Light for the Development of the World, 801126 (25 October 2011); doi: 10.1117/12.903405
Show Author Affiliations
Gildardo Pablo Lemus-Alonso, Benemérita Univ. Autónoma de Puebla (Mexico)
Alberto Cordero-Dávila, Benemérita Univ. Autónoma de Puebla (Mexico)
Rafael Izazaga-Pérez, Instituto Nacional de Astrofísica, Óptica y Electrónica (Mexico)

Published in SPIE Proceedings Vol. 8011:
22nd Congress of the International Commission for Optics: Light for the Development of the World
Ramón Rodríguez-Vera; Ramón Rodríguez-Vera; Ramón Rodríguez-Vera; Rufino Díaz-Uribe; Rufino Díaz-Uribe; Rufino Díaz-Uribe, Editor(s)

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