Performances Evaluation of Vitrified Bonded CBN Wheel under Different Grinding Fluid

The application of fluids in grinding is critical to the surface quality of the workpiece and the life of the grinding wheel. Lubrication and cooling are the most important roles provided by a grinding fluid. Hence, conventional method of flood delivering coolant fluid by a nozzle in order to achieve high process performance purposivelly. In the paper, effect of grinding fluid on grinding performances of vitrified bonded CBN wheel was analyzed and evaluated. Experiments were performed with precision cylindrical grinder M1420E and harded workpiece material 45 steel. To evaluate the influence of different cutting fluid, the experimental results such as microscopic topography (Scanning Electron Microscope images), surface roughness Ra values, and residual stress and diametrical wear amount of grinding wheel were investigated. The results showing that the surface quality and roughness Ra values of machined surface with lubricating oil were obviously improved comparing with emulsion fluid and synthetic fluid. The results revealed that the CBN wheel and grinding oil give an optimum combination for performance grinding operation.