19 May 2003 Pre-polishing on a CNC platform with bound abrasive contour tools
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Deterministic micorgrinding (DMG) of optical glasses and ceramics is the commercial manufacturing process of choice to shape glass surfaces prior to final finishing. This process employs rigid bound matrix diamond tooling resulting in surface roughness values of 3-51.tm peak to valley and 100-400nm rms, as well as mid-spatial frequency tool marks that require subsequent removal in secondary finishing steps. The ability to pre-polish optical surfaces within the grinding platform would reduce final finishing process times. Bound abrasive contour wheels containing cerium oxide, alumina or zirconia abrasives were constructed with an epoxy matrix. The effects of abrasive type, composition, and erosion promoters were examined for tool hardness (Shore D), and tested with commercial optical glasses in an OptiproTM CNC grinding platform. Metrology protocols were developed to examine tool wear and subsequent surface roughness. Work is directed to demonstrating effective material removal, improved surface roughness and cutter mark removal.
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Adrienne E. Schoeffer, Adrienne E. Schoeffer, } "Pre-polishing on a CNC platform with bound abrasive contour tools", Proc. SPIE 10314, Optifab 2003: Technical Digest, 103140A (19 May 2003); doi: 10.1117/12.2283999; https://doi.org/10.1117/12.2283999

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