Investigation of the cooling method added on the tool rake surface in terms of tool wear and chip morphology

Temperature and tool wear in machining operations and cutting processes are among the most frequently researched topics. Cooling processes are applied in different ways in research and applications. During the machining process, the highest temperatures occur at the tool-chip interface. With temperature, chemical interactions occur and different friction-induced wear occurs on the tool. As a result, the tool loses its cutting ability and ends its life. Therefore, an improvement in the tool-chip interface will directly affect tool life and increase cutting performance. The aim of this study is to reduce friction by applying cooling process to the tool-chip interface where the temperature is highest and to prevent the temperature increase accordingly. Thus, to examine the effects of this cooling method on tool life and chip morphology. For this purpose, a 1 mm diameter hole was drilled on the rake angle surface of an HSS tool, and through this hole, cooling water was applied to the chip-tool interface by jetting cooling method with 25 bar pressure. The effects of the classical jetting cooling method and the cooling method in the study in terms of chips, tool life and machining length were examined comparatively. HSS material cutting tool in DNMG 150604 form was used in the study. A separate pressurized cooling unit and system was established for the jetting cooling method. The findings of both methods were evaluated with different experimental parameters. As a result, it was determined that the cooling method applied in the study produced positive results in terms of both tool life, chip morphology and machining length.