The Optimum Crystal Plane of Natural Diamond Tool for Precision Machining

Summary Because of the strong anisotropism of single crystal diamond. the optimization of crystal plane becomes very important and crucial in manufacturing of single point diamond tool. The friction states between the rake and the flank of diamond tool and workpiece materials affect shear deformation, tool wear and the quality of machined surface directly. In this paper, the writers investigated the friction coefficients between diamond oriented various crystallographic direction and non-ferrous metals by experiment simulating friction states of ultra-precision machining, and find out that the friction coefficients is not only different with different crystal planes. but also different with different directions in the Same crystal plane. These experiments lead to the conclusion that (100) plane is the optimum plane for the rake and the flank of single point diamond tool.