Research on the Cutting process and surface properties of ultrasonic vibration-assisted cutting of carbon fiber-reinforced polyetheretherketone

Carbon fiber reinforced polyetheretherketone (CFR-PEEK) composites have been gradually applied in aerospace, biomedicine and other fields due to their excellent mechanical properties and outstanding corrosion resistance. Ultrasonic vibration cutting has the advantages of low cutting force, high material removal rate and good surface quality. In this study, a two-dimensional CFR-PEEK material model with randomly distributed fibers was constructed, and ultrasonic vibration cutting simulation and experiments were carried out. Four cutting speeds, namely feed rate of 0.1 mm/r, cutting depth of 0.1 mm, and cutting speed v _c = 20 m/min, v _c = 40 m/min, v _c = 60 m/min, and v _c = 80 m/min, were selected for the test. As the cutting speed increases, the cutting force increases and the surface roughness increases. Ultrasonic vibration also helps to generate curved chips and reduce heat accumulation in the cutting area. The cutting speed of 20 m/min, the depth of cut of 0.1 mm, and the feed rates of 0.05 mm/r, 0.1 mm/r, 0.15 mm/r and 0.2 mm/r were selected for the test. It is found that the micro-texture generated by ultrasonic vibration can reduce the coefficient of friction and improve the anti-wear performance.