INVESTIGATION OF THE MACHINING PARAMETERS FOR THE FINISH TURNING
To obtain the required surface quality by machining, cutting parameter selection is important. This can be achieved by improving the quality and performance of cutting tools. This paper presents the effect of the construction of the tool holder on the surface roughness in turning. Also the changes of the surface roughness by varying the value of the tool overhang, cutting speed, feed rate and depth of cut are considered. It was used three different workpieces made of aluminum, steel and cast iron. The experiments were carried out on the lathe model 16K20VF1. Using single-factor experiment, results of the experiments showed that the increase in speed and tool overhang, reduction in feed rate and depth of cut improves the surface roughness. At the end of the experiments it was obtained the optimum cutting conditions for each material, where the surface roughness was the best. The surface roughness of aluminum has the smallest value and cast iron – the greatest. Turning of the workpieces using metallic tool gets better surface roughness, due to its high rigidity.