Title: Study on shaping spherical Poly Crystalline Diamond tool by Micro-electro-Discharge Machining and micro-grinding with the tool

Authors: Takeshi Masaki, Tsunemoto Kuriyagawa, Jiwang Yan, Nobuhito Yoshihara

Addresses: Department of Nanomechanics, Graduate School of Engineering, Tohoku University, Aoba 6-6-01, Aramaki, Aoba-ku, Sendai 980-8579, Japan. ' Department of Nanomechanics, Graduate School of Engineering, Tohoku University, Aoba 6-6-01, Aramaki, Aoba-ku, Sendai 980-8579, Japan. ' Department of Nanomechanics, Graduate School of Engineering, Tohoku University, Aoba 6-6-01, Aramaki, Aoba-ku, Sendai 980-8579, Japan. ' Department of Nanomechanics, Graduate School of Engineering, Tohoku University, Aoba 6-6-01, Aramaki, Aoba-ku, Sendai 980-8579, Japan

Abstract: Micro-electro-Discharge Machining (Micro-EDM) for shaping of a spherical tool made of Poly Crystalline Diamond (PCD) has been developed for the purpose of enabling a grinding process of a micro-free form surface on hard and brittle materials. Using this spherical PCD tool as a grinding tool, the surface roughness of a minute flat plane (90 × 70 µm), which was ground into tungsten carbide, has 28 nm Rz and 5 nm Ra. This paper describes the capabilities of spherical PCD tool grinding with the following results.

Keywords: micromachining; microelectro-discharge machining; micro EDM; polycrystalline diamond; PCD tools; microgrinding; electro-discharge machining; electrical discharge machining; freeform surfaces; hard materials; brittle materials; surface roughness; spherical tooling.

DOI: 10.1504/IJSURFSE.2007.016689

International Journal of Surface Science and Engineering, 2007 Vol.1 No.4, pp.344 - 359

Published online: 15 Jan 2008 *

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