Development of Vitrified Diamond Grinding Wheel for Engineering Ceramics

Abstract

Newly developed engineering ceramics are very difficult to be ground using conventional diamond grinding wheel because of their poor dressability and low cutting ability. In this study, a rigid and porous vitrified diamond grinding wheel was made so that a diamond grain might not deteriorate and it might be tightly bonded to the bond bridge using proper frit bond at lower firing temperature. According to the grinding test results, the grinding force was very low and dimensional accuracy of ground ceramics was very excellent.

Effect of TiO2films on diamond: oxidation resistance and wear performance

“…The friction coefficients and the grinding ratio (G ratio) of different diamond vitrified bonded wheels were evaluated by a pin-on-disk wear tester. 12 The grinding ratio and physical property of different diamond vitrified bond wheels are shown in Table 3. It is easy to see that the uncoated diamond grinding wheel was oxidised by the alkali metal oxides during the sintering, and the volume was expanded, porosity increased, hardness and G ratio were lower.…”

Ceramic machining

“…In developing a wheel for application to advanced ceramics [Kuroshima et al 1985 andSugishita et al 1991] it is necessary to optimize the bond and grit components with respect to the properties of the workpiece, required finish, tolerance, machine tool, grinding fluid, and the type of grinding operation, e.g., internal, external, etc. An overriding consideration is, of course, the overall strength and safety of the wheel.…”