Study on the mechanical grinding of CVD diamond

This study is focused on the mechanical grinding of CVD diamond for better understanding of the effects of different parameters on the grinding process and optimising them using Taguchi method and grey relational analysis. Two types of CVD diamond, i.e. CDM and CDE, are used for the study. Taguchi orthogonal array is used to ease the experiments. Grain size of the wheel, feed rate and the grinding velocity is taken as the grinding parameters. Cutting edge radius and grinding force are selected as the quality targets. Grain size of the wheel (7 um), grinding velocity (19.625 m/s) and feed rate (0.2 um) are the optimum parameters obtained via grey relational analysis. Analysis of the variance (ANOVA) is also applied to evaluate the contribution of the each parameter in orthogonal experiment. The grain size of the wheel is the most significant parameter for the grinding operation according to the weighted sum grade of the cutting edge radius and the grinding force. The obtained results show that the Taguchi method and grey relational analysis are being effective technique to optimise the parameters for grinding CVD diamond.