한국정밀공학회지 (Journal of the Korean Society for Precision Engineering)

  • 제26권1호
  • /
  • Pages.57-62
  • /
  • 2009
  • /
  • 1225-9071(pISSN)
  • /
  • 2287-8769(eISSN)
한국정밀공학회 (Korean Society for Precision Engineering)
권호 표지

Feedrate Control에 의한 초경코어 표면조도 향상에 관한 연구

A Study on Improvement of WC Core Surface Roughness by Feedrate Control

  • 김현욱 (한국광기술원 초정밀광학팀) ;
  • 정상화 (조선대학교 기계공학과) ;
  • 이동길 (한국광기술원 초정밀광학팀) ;
  • 김상석 (한국광기술원 초정밀광학팀) ;
  • 김혜정 (한국광기술원 초정밀광학팀) ;
  • 김정호 (한국광기술원 초정밀광학팀)
  • Kim, Hyun-Uk (Korea Photonics Technology Institute, Ultra Precision Optics Team) ;
  • Jeong, Sang-Hwa (Department of Mechanical Engineering, Chosun Univ.) ;
  • Lee, Dong-Kil (Korea Photonics Technology Institute, Ultra Precision Optics Team) ;
  • Kim, Sang-Suk (Korea Photonics Technology Institute, Ultra Precision Optics Team) ;
  • Kim, Hye-Jeong (Korea Photonics Technology Institute, Ultra Precision Optics Team) ;
  • Kim, Jeong-Ho (Korea Photonics Technology Institute, Ultra Precision Optics Team)
  • 발행 : 2009.01.01
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

Recently, with the increasing lightness and miniaturization of high resolution camera phones, the demand for aspheric glass lens has increased because plastic and spherical lens are unable to satisfy the required performance. An aspheric glass lens is fabricated by the high temperature and pressure molding using a tungsten carbide molding core, so precision grinding technology for the molding core surface are required. This paper reports a development of feedrate control grinding method for aspherical molding core using parallel grinding method. A plane molding core was ground using conventional and feedrate control grinding method. The performance of the feedrate control method was evaluated by measurement of surface roughness. The result indicated that the average surface roughness was reduced to 1.5 nm, which is more efficient than the conventional grinding method.

키워드

참고문헌

  1. Suzuki, H., Kodera, S., Nakasuji, T., Ohta, T. and Syoji, K., "Precision Grinding of Aspherical CVDSiC Molding Die," International Journal Japan Society for Precision Engineering, Vol. 32, No. 1, pp. 25-30, 1998
  2. Hyun, D. H. and Lee, S. J., "A Study on Grinding Characteristics of Aspherical Glass Lens Core of High-pixel Digital Camera in Diamond Grinding Process," Transactions of the Korean Society of Machine Tool Engineers, Vol. 12, No.2,pp. 31-36, 2003
  3. Chen, M. J., Li, D. and Dong, S., "Research on a large depth-to-diameter ratio ultra-precision aspheric grinding system," Journal of Materials Processing Technology, Vol. 129, Issues 1-3, pp. 91-95, 2002 https://doi.org/10.1016/S0924-0136(02)00582-4
  4. Kim, H. U., Jeong, S. H., Park, Y. P., Kim, S. S., Kim, H. H. and Kim, J. H., "DLC Coating Effect of WC Mold Surface for Glass Molding Lens," The Korean Institute of Electrical and Electronic Material Engineers, Vol. 19, No. 11, pp. 1050-1053, 2006 https://doi.org/10.4313/JKEM.2006.19.11.1050
  5. Cha, D. H., Kim, H. J., Kim, H. U., Kim, S. S., Park, Y. P. and Kim, J. H., "Fabrication and Optical Evaluation of Aspheric Glass Lenses," InternationalJournal of the Optical Review, Vol. 14, No. 3, pp. 145-150, 2007 https://doi.org/10.1007/BF02919415
  6. Kim, H. T., Yang, H. J. and Kim, S. C., "Control Method for the Tool Path in Aspherical Surface Grinding and Polishing," International Journal of Precision Engineering and Manufacturing, Vol. 7, No. 4, pp. 51-56, 2006
  7. Lee, J. S., Saeki, N., Kuriyagawa, T. and Syoji, K., "A Study on the Mirror Grinding for Mold of a Small Aspherical Lens," International Journal of PrecisionEngineering and Manufacturing, Vol. 4, No. 3, pp. 48-54, 2003 https://doi.org/10.1007/s12541-009-0038-8
  8. Chen, W. K., Kuriyagawa, T., Huang, H. and Yosihara, N., "Machining of micro aspherical mould inserts," Precision Engineering, Vol. 29, No. 3, pp. 315-323, 2005 https://doi.org/10.1016/j.precisioneng.2004.11.002
  9. Huang, H., Chen, W. K. and Kuriyagawa, T., "Profile error compensation approaches for parallel nanogrinding of aspherical mould inserts," International Journal of Machine Tools & Manufacture, Vol. 47, Issue 15, pp. 2237-2245, 2007 https://doi.org/10.1016/j.ijmachtools.2007.06.008
  10. Lee, E. S. and Baek, S. Y., "A study on optimum grinding factors for aspheric convex surface microlens using desing of experiments," International Journal of Machine Tools & Manufacture, Vol. 47, Issues 3-4, pp. 509-520, 2007 https://doi.org/10.1016/j.ijmachtools.2006.06.007