MICRO-DISCONTINUITIES OF THE GRINDING WHEEL AND THEIR EFFECTS ON ITS DURABILITY DURING INTERNAL CYLINDRICAL GRINDING

The article depicts the kinematic parameters of micro-discontinuities and how their shaping methods impact upon the active surface of grinding wheels. It also details the construction of a special device which makes it possible to obtain micro-discontinuities with specific and defined surface configurations and shapes. Experimental research into the effects of shaping the micro-discontinuities of the grinding wheel active surface was realized in the internal deep traverse grinding process. Grinding wheels with a ceramic bond, made from micro-crystalline sintered corundum grains, were utilized in the research. The research investigated the duration of the durability period of the grinding wheels. It also looked at the grinding power, as well as the machined surface roughness, when using grinding wheel with or without micro-discontinuities shaped upon the active surface. As a result of the research undertaken, it was determined that the implementation of micro-discontinuities extends the grinding wheel durability period by at least three times its original duration, while maintaining the desired quality of the machined surface.