Title: Manufacture and application performance of precision grinding wheels with CVD coated abrasive layers

Authors: Ekkard Brinksmeier; Oltmann Riemer; Grigory Antsupov; Kathrin Meiners; Jan Gäbler

Addresses: Laboratory for Precision Machining, University of Bremen, Badgasteiner Str. 2, 28359 Bremen, Germany ' Laboratory for Precision Machining, University of Bremen, Badgasteiner Str. 2, 28359 Bremen, Germany ' Laboratory for Precision Machining, University of Bremen, Badgasteiner Str. 2, 28359 Bremen, Germany ' Laboratory for Precision Machining, University of Bremen, Badgasteiner Str. 2, 28359 Bremen, Germany ' Fraunhofer Institute for Surface Engineering and Thin Films IST, Bienroder Weg 54 E, 38108 Braunschweig, Germany

Abstract: Diamond abrasive layers produced by chemical vapour deposition (CVD) have proven their high potential for their application as grinding wheel abrasive layer. Besides the achievable superb workpiece surface qualities, the low wear rates of the tools show a further important advantage. The wear rates of CVD diamond layers were up to 80 times lower compared to wear rates of standard fine grained diamond grinding wheels. Additionally, it has been shown that worn CVD diamond layers can be resharpened by a short CVD coating processes. The topography of CVD diamond layers after recoating was nearly identical to the initial topography, thus the grinding performance was comparable. This paper introduces the CVD process, the manufacture and the topography of the CVD diamond grinding wheels and discusses the latest results of grinding tests on optical glass (N-BAK2) an PCBN, as well as the recoating procedure of the grinding tools.

Keywords: CVD coatings; coated abrasive layer; PCBN grinding; diamond abrasive layers; glass grinding; recoating; chemical vapour deposition; precision grinding wheels; wear rate; surface quality; surface roughness; resharpening; grinding performance; grinding wheel manufacture; optical glass.

DOI: 10.1504/IJAT.2012.052038

International Journal of Abrasive Technology, 2012 Vol.5 No.4, pp.299 - 314

Received: 05 Nov 2012
Accepted: 05 Nov 2012
Published online: 30 Jul 2014 *

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