Surface Quality Improvement of Aspheric Pressing Mould Using Parallel Grinding Method

Abstract:

It is a cost-effective technology to obtain aspheric optics made from optical glass and other brittle materials using pressing mould. The optical quality of molded optics is determined mostly by the surface quality of the mould, which means poor mould surface with lots of cutter marks will result in adhesion phenomena and error replication between the optics and mould. [1] In this article, a chatter model about parallel grinding system was presented, and the reasons of chatter induced by velocity feed back was analyzed and simulated. By using parallel grinding system integrated ELID technology, and wheel with greater cross-section radius in rough grinding and constant grinding velocity in fine grinding, the amplitude of cutter marks in the surface of mould was minimized and the quality of the mould surface was improved.

• Periodical: Key Engineering Materials (Volumes 291-292)
• Pages: 133-138
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.291-292.133
• Online since: August 2005
• Authors: Fei Hu Zhang, L.J. Li, Shen Dong
• Keywords: Aspheric Optic, Cutter Marks, ELID (Electrolytic In-Process Dressing), Parallel Grinding, Pressing Mould

References

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DOI: 10.1016/s0890-6955(02)00062-7

[2] Tsunemoto Kuriyagawa, A new grinding method fo aspheric ceramic mirrors, Materials Processing Technology, Vol 62 (1996) pp.387-392.

DOI: 10.1016/s0924-0136(96)02440-5

[3] Nobuhito Yoshihara, Development of Fluctuation-Free Ultra-Precison Aspherical Grinding Method for Extreme Precision Optical Parts.

[4] Shi Hanmin, Metal cuttign theory and practice-A new perspective.