In the present work, hard turning of AISID2 Steel were carried out on CNC turning centre using TiCN coated carbide tools to investigate the effect of cutting parameters on surface roughness parameters (Ra, Rq, Rz) The statistical models were developed using the Taguchi method to find the effect of cutting parameters (speed, feed, and depth of cut) on surface roughness parameters. L9 orthogonal array is designed for the experiments and experiments were carried out for one, two and three passes to evaluate the optimum roughness value of the surface roughness parameters. It was observed from the results that the feed rate played an important role with surface parameters.
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