Study of ultra-precision polishing of electroless nickel molding dies

Jiadai Xue; Yangong Wu; Jiewei Luo; Da Qu; Yutao Liu; Bo Wang; Yanji Yang

doi:10.1117/12.2516878

11 January 2019 Study of ultra-precision polishing of electroless nickel molding dies

Jiadai Xue, Yangong Wu, Jiewei Luo, Da Qu, Yutao Liu, Bo Wang, Yanji Yang

Proceedings Volume 10837, 9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes; 108371B (2019) https://doi.org/10.1117/12.2516878
Event: Ninth International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT2018), 2018, Chengdu, China

Abstract

Electroless nickel is an excellent material for making optical molding dies, because of its machinability with both single-point diamond turning and polishing, as well as its suitable hardness and durability. This paper deals with the ultra-precision polishing of molding dies for telescope mirrors with a super smooth surface with a roughness below 1 nm root-mean- square (rms). According to the probability density distribution function of different sizes of abrasive grains cut into the workpiece, a surface roughness model combining the micro contact model and the force balance principle was established. A surface roughness of 0.316 nm Ra was obtained on slab molding dies of 30 mm in diameter.

Citation Download Citation

Jiadai Xue, Yangong Wu, Jiewei Luo, Da Qu, Yutao Liu, Bo Wang, and Yanji Yang "Study of ultra-precision polishing of electroless nickel molding dies", Proc. SPIE 10837, 9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, 108371B (11 January 2019); https://doi.org/10.1117/12.2516878

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