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Ceramic Core Processing Technology for the Glass Mold of Aspherical Lenses using High-speed Cutting Machine  

Ryu, Geun-Man (한국기초과학지원연구원)
Kim, Hyo-Sik (충남대학교 기계공학과)
Kim, Hong-Tek (충남대학교 기계공학과)
Yang, Sun-Choel (한국기초과학지원연구원)
Jang, Ki-Soo (한국기초과학지원연구원)
Kim, Dong-Ik (한국기초과학지원연구원)
Won, Jong-Ho (충남대학교 기계공학과)
Kim, Geon-Hee (충남대학교 분석과학기술대학원)
Publication Information
Journal of the Korean Society of Manufacturing Process Engineers / v.11, no.3, 2012 , pp. 7-12 More about this Journal
Abstract
Ceramic core processing technology using 5-axis high-speed cutting machine is applied to make the glass molds for aspherical ophthalmic lenses. In the technology, optimum processing conditions for aspherical ceramic molds are based on minimal experimental data of surface roughness. Such surface roughness is influenced by fabricating tools, cutting speed, feed rate, and depth of cut, respectively. In this paper, we present that surface roughness and shape accuracy of aspheric ceramic mold obtained by optimum processing conditions are Pa $0.6184{\mu}m$ and Pt $5.0301{\mu}m$, respectively, and propose that these values are sufficiently possible to apply to making the glass molds for aspherical ophthalmic lenses.
Keywords
Aspherical Ophthalmic Lenses; High-speed Cutting Machine; Ceramic Core; Surface Roughness; Shape Accuracy;
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