Investigation of the effect of cutting parameters on cutting force, surface roughness and chip shape in turning of Sleipner cold work tool steel

In this study, the effects of cutting parameters on cutting force components, surface roughness and chip formation in turning Sleipner cold work tool steel has been examine experimentally. In turning experiments were used cemented carbide cutting tools coated with CVD method. Experiments were carried out at five different cutting speeds, three different feed rates and constant depth of cut. Cutting tool wears was examined by scanning electron microscopy (SEM). As a result, the main cutting force in cutting force components was affected more by the cutting parameters than the passive force and the feed force. The lowest cutting force was obtained at 359,6 N in 100 m/min cutting speed and 0,1 mm/rev feed rate. The highest cutting force was measured at 921,3 N in 50 m/min cutting speed and 0,3 mm/rev feed rate. Among the machined surfaces the lowest surface roughness was obtained as 0.97 mu m at 150 m/min cutting speed and 0.1 feed rate. The highest surface roughness was found to be 5.12 mu m at 50 m/min cutting speed and 0.3 mm/rev feed rate. It has been observed that there is chip adhesion to cutting tools used at low cutting speeds. Furthermore, there was wear on the cutting tools used at high cutting speeds and feed rates. Chip shapes similar to compound and spiral chip types were observed in the parameters where the lowest cutting force and surface roughness were measured.