Investigation of Cutting Tool Wear in the Milling Process of the Inconel 718 Alloy

The article presents the results of research on the wear of the cutting tool in the process of high feed milling and plunge milling of the Inconel 718 alloy. A specially designed milling head was used in the study, allowing both of the previously mentioned milling methods to be implemented with a single tool. Ceramic inserts CNGN120712 in versions CS300 and CW100 were used for the research. During the experiment, the values of cutting depth ap [mm], cutting width ae [mm] and feed per edge fz [mm/edge] were changed. The study was conducted under the conditions of accelerated wear. The results show the tool life in individual tests using the parameter of the material volume predicted to be removed in the tool life cycle Gmax [cm3], obtained by third degree polynomial approximation. For milling with high feeds, the volume of material expected to be removed over the tool life cycle Gmax ranged from 54 to 106 cm3, whereas for plunge milling it ranged from 33 to 73 cm3.