Investigation of tribological conditions on grinding of bioceramic material using diamond grinding wheel under different cooling and lubrication environment

Abstract

The temperature rise and the quantity of energy transferred to the workpiece were estimated in the grinding of bioceramic (pre-sintered zirconia) material with a diamond wheel based on the modeling and experimental method. The finite volume method has been used to investigate the temperature distribution under different environments such as dry, wet, and MQL. The power generated from the experimental method was given as input data to the thermal model analysis. The tribology of the grinding process was investigated depending on different factors such as temperature, energy partition, surface morphology, coefficient of friction, and surface energy. The rise in temperature and the quantity of heat transferred to the workpiece were estimated depending on the analysis of the inverse heat transfer method. The results indicated that the maximum energy partition assessed in the dry condition was around (39–60%) to the workpiece material, which differs from the wet condition as it was reduced to (15–40%). The energy partition for the MQL condition was close to the dry condition as (33–58%). The diamond wheel consumes more quantity of heat energy at the contact interface and reduces the temperature of the workpiece surface. The predicted temperature using the thermal model analysis was acceptable with the experimental method. After the thermal analysis, the coefficient of friction at the contact interface was calculated which was observed to be high for both the dry and the wet conditions compared to the MQL. Additionally, the quantity of surface energy consumed by the ploughed friction was also augmented for the dry and wet conditions. Evidently, it leads to more deformation for the work material under these conditions. Finally, the interaction between the sharp edges and the workpiece surface was reduced in the MQL condition.