Browse > Article

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

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)
Publication Information
Journal of the Korean Society for Precision Engineering / v.26, no.1, 2009 , pp. 57-62 More about this Journal
Abstract
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.
Keywords
Feedrate control method; Surface roughness; Tungsten Carbide;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
연도 인용수 순위
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 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   과학기술학회마을   DOI   ScienceOn
3 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   DOI   ScienceOn
4 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   DOI   ScienceOn
5 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   DOI   ScienceOn
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   과학기술학회마을
7 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   DOI
8 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   DOI   ScienceOn
9 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   과학기술학회마을
10 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   DOI   ScienceOn