Experimental and statistical investigation of the effect of coating type on surface roughness, cutting temperature, vibration and noise in turning of mold steel

In this study, machining experiments were performed by metal cutting in different cutting parameters with CVD - Chemical Vapor Deposition (MT-TiCN + TiC +Al₂O₃ + TiN) and PVD - Physical Vapor Deposition (TiAIN) coated carbide tools NIMAX plastic mold steel in a universal lathe. Changes in surface roughness, cutting temperature, vibration, and noise that occurred during machining were examined. The test specimens were machined with 18 different parameters using three different cutting speeds (120, 160, 200 m/min) at three different feed rates (0.1, 0.15, and 0.2 mm/rev) and a constant depth of cut (0.5 mm). As a result of the experiments performed, surface roughness, cutting temperature, vibration, and noise values were examined, and the best performance was obtained with PVD-coated cutting tool. Taguchi optimization was also applied to the experimental results of the study. The turning parameters giving the lowest Ra value were determined. The most effective turning parameters and effect ratios on Ra were determined by ANOVA analysis.