Thermo-chemical dressing of coarse grained diamond grinding wheels

This paper deals with a novel dressing method for coarse grained, single layered metal bonded grinding wheels based on the dynamic friction polishing. The diamond friction polishing technique utilizes the thermo-chemical reaction between a diamond sample and a metal tool rotating at high speed. Here, the tips of the diamond grains of a rapidly rotating grinding wheel are thermo-chemically flattened due to the contact with two slowly rotating steel calottes at predetermined friction pressure p(d) and grinding wheel velocity v(sd). Dressing experiments have been carried out changing the friction pressure p(d) and the grinding wheel velocity v(sd). The generated topography of the grinding wheel has been characterized by a confocal laser scanning microscope. Thus, the flattened grains with an average grain protrusion h(k) could be measured and the influence of the friction pressure and grinding wheel velocity on the dressing process is shown.