Evolution of the working surface of diamond dressing sticks prior to its fracture

The paper addresses working surface wear of electroplated diamond dressing sticks at a stage prior to fracture during the dressing of abrasive wheels. The fracture is found to occur through drastic breakoff of diamond grits from the bond, the grit size and the nickel bond type being the main factors that dictate the fracture onset time. The authors provide a more precise definition of the relationship between the bond hydroabrasive wear parameters, kinematic characteristics of dressing, and physical-mechanical characteristics of the bond. The difference in the wear rate between diamond grits and the bond in a single-layer dressing tool is demonstrated to introduce large errors into the measurement of specific diamond consumption by weighing. A procedure is put forward which allows a variation in the mass wear ratio between diamond grits and a bond to improve the measurement accuracy.