Wear of the blade diamond tools in truing vitreous bond grinding wheels - Part II. Truing and grinding forces and wear mechanism

Truing and grinding forces and the wear mechanism of particle and rod diamo nd blade tools used to generate precise and intricate forms on rotating vit reous bond silicon carbide grinding wheels are presented. A Hall effect sen sor was used to measure the change of grinding spindle power during truing and grinding. A signal processing procedure was developed to identify indiv idual truing passes and to extract the average, peak-to-valley, and standar d deviation of the variation of truing force for each pass. The truing forc e data and SEM micrographs of worn surfaces on blade tools reveal micro- an d macro-fracturing of the diamond. The attritious and erosion wear of the d iamond rod and particle, erosion of the metal bond, and pulling-out of the diamond particle are also identified. Grinding force data shows that, for t he same truing parameters, a wheel trued by the rod diamond blade tool has higher grinding forces than one trued by a particle diamond blade tool. (C) 2001 Elsevier Science B.V. All rights reserved.