Evaluating the Impact of Cutting Tool Flute Numbers and Cutting Parameters on Cutting Force in Milling AISI P20

In improving machining process, cutting force is one of the indicators to determine the performance of the process. Cutting parameters such as cutting speed, feed rate, and depth of cut are the main factors that play significant roles. However, intermittent machining such as milling has a strong relationship with the cutting force that can lead to machining accuracy result. This is due to continuous and discontinuous engagement between cutting tool flute and workpiece during the process. The improvement of the process is still challenging especially for hard to cut materials. Hence, this study aims to investigate the effect of tool flute number along with cutting parameters on cutting force in milling AISI P20 tool steel. Two flutes and three flutes coated carbide cutting tools were used in milling the AISI P20. Different cutting speeds of 140, 170, and 200 m/min, cutting feed of 0.05, 0.1, and 0.15 mm/tooth with constant depth of 0.15 mm as cutting parameters. Pilot study was conducted to determine the effect of the selected parameters on the cutting force. Then, Taguchi L18 was used to design the experiment and to determine the significant factors on the cutting force. Based on Taguchi analysis result, feed per tooth is the most significant factor. 140 m/min cutting speed, 0.05 feed per tooth and two flutes cutting tools give the lowest cutting force.