OBRABOTKAMETALLOV MATERIAL SCIENCE Том 23 № 3 2021 EQUIPMEN . INSTRUM TS Vol. 5 No. 4 2023 first set, UVAHT experiments are performed using constant frequency of 20 kHz with a vibrational amplitude of 20 µm. To understand UVAHT better, a theoretical model for power consumption and flank wear were developed using dimensional analysis. The second set of experiments was performed to calibrate the developed model considering the effect of cutting speed, frequency, and amplitude of vibrations. The cutting conditions used for comparative evaluation and theoretical modeling are depicted in table 2. Ta b l e 2 Values of cutting parameters obtained by Design Expert Run order Comparative evaluation between CT and UVAHT Theoretical modelling: UVAHT Cutting speed (Vc) (m/min) Feed (f) (mm/rev) Depth of cut (d) (mm) Cutting speed (Vc) (m/min) Frequency (F) (kHz) Amplitude (A) (µm) 1 60 0.085 0.4 60 20 20 2 120 0.075 0.35 120 20 20 3 100 0.068 0.4 100 20 20 4 100 0.085 0.5 100 20 20 5 100 0.085 0.4 100 20 20 6 80 0.075 0.35 80 20 20 7 100 0.085 0.3 100 20 20 8 120 0.075 0.45 120 20 20 9 100 0.103 0.4 100 20 20 10 100 0.085 0.4 100 20 20 11 80 0.095 0.45 80 20 20 12 100 0.085 0.4 100 20 20 13 100 0.085 0.4 100 20 20 14 80 0.075 0.45 80 20 20 15 100 0.085 0.4 100 20 20 16 120 0.095 0.35 120 20 20 17 80 0.095 0.35 80 20 20 18 120 0.095 0.45 120 20 20 19 145 0.085 0.4 145 20 20 20 100 0.085 0.4 100 20 20 The focus of the present study was on tool wear and power consumption. A Dino-Lite digital microscope with a magnification of up to 240X was used to measure tool wear. A clamp meter, which looks like a clothespin, was used to measure the current carried by a live wire. A clamp meter detects the magnetic field created by a flowing current in a wire. The power consumption during turning is given by the product of voltage and measured current. The actual set of machining conditions as per the design of experiment is shown in table 3. In the case of conventional turning, frequency and amplitude were considered to be zero, and in the case of ultrasonic vibration-assisted turning, frequency and amplitude were kept constant at 20 kHz and 20 µm respectively.
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