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고속 가공기를 활용한 비구면 안경렌즈 유리금형용 세라믹코어 가공기술
류근만(Geun-Man Ryu),김효식(Hyo-Sik Kim),김홍택(Hong-Tek Kim),양순철(Sun-Choel Yang),장기수(Ki-Soo Jang),김동익(Dong-Ik Kim),원종호(Jong-Ho Won),김건희(Geon-Hee Kim) 한국기계가공학회 2012 한국기계가공학회지 Vol.11 No.3
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㎛ and Pt 5.0301㎛ , respectively, and propose that these values are sufficiently possible to apply to making the glass molds for aspherical ophthalmic lenses.