Wear Processes of Diamond Grain in Grinding. Investigation with Model Wheels.

Diamond fracture characteristics van, with the crystallographic orientation of the facets. The direction of grain facet on the surface of the diamond wheel is an important factor affecting the wheel performance. In this paper, the grain wear as influenced by the differences in the direction on the facets was investigated. Five types of model wheels were made of which fours consisted of grains with specific orientations of the facets and one random orientation representing a typical grinding wheel. Using these model wheels, grinding tests were carried out. on zirconia work material. The results obtained are summarized as follows: (1)Height loss of grain tip is caused by fracture in all wheels. (2) The edge shape is kept sharp by fracture enhancing grinding ability. (3) When {100} of diamond grain was oriented towards the grain tip and cut with , height loss of the wheel is formed to be the lowest of all wheels. Consequently, this combination is formed to be optimal concerning the wheel wear.