Investigation of cutting force during face milling of coarse-grained and ultrafine-grained titanium alloys vt-6

The results of an experiment on face milling of titanium alloy Ti-6Al-4V (VT-6) and ultrafine-grained alloy VT6UM3 obtained by equal-channel angular pressing are analyzed. The production technology of an ultrafine-grained alloy, as well as its physical-mechanical characteristics are considered. The results of experiments to determine the dependence of the cutting force on the cutting modes for face milling on the universal milling machine PROMA, model FHV-50PD are presented. The cutting force was determined indirectly by measuring the displacement of a mill mandrel, using a vibration sensor. Vibrations of the instrument subsystem were recorded with a sampling frequency of up to 5 kHz, using a non-contact vibration sensor. Regression dependences of the cutting force on the milling modes for both the alloys were obtained, confirming their statistical significance. Based on the obtained data on the cutting forces, as well as analysis of chip formation features (burr parameters and the type of chips formed), comparative analysis of the data obtained and conclusions about the features of cutting a new alloy have been made. The problems of practical application of the study results are discussed.