Nanometric grinding of axisymmetric aspherical mould inserts for optic/photonic applications Online publication date: Tue, 06-Mar-2007
by Han Huang, Tsunemoto Kuriyagawa
International Journal of Machining and Machinability of Materials (IJMMM), Vol. 2, No. 1, 2007
Abstract: Nanometric grinding technologies have been developed for fabricating axisymmetric and aspherical mould inserts of cemented tungsten carbide for optical/photonic uses. In this work, a process for truing and dressing ultrafine diamond wheels for nanometric grinding, including the wheel evaluation techniques, was successfully developed. This enabled the achievement of a grain pack density of 87% for the wheels with a mesh size of 3000. A compensation method was proposed to minimise the effect of the initial wheel dimensional and profile errors through the integration of a 'dummy' grinding procedure to the grinding process. With the developed grinding protocol, cemented tungsten carbide aspherical mould inserts of 6 and 1 mm in diameters with profile accuracies of ∼0.4 µm in PV value and average surface roughness of below 10 nm were fabricated after only one actual grinding cycle.
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