Study on Torsional Vibration Performance of Twist Drill in Axial Vibration Drilling

Based on mechanical kinetics theory, the torsional vibration equation of Twist drill is built and solved. Then, according to the characteristics of axial vibration drilling, its torsional vibration performance is analyzed deeply. The result shows that the average torsional deformation of low-frequency axial vibration drilling is less than that of common drilling and the torsional deformation of ultrasonic axial vibration drilling is approach to zero, so vibration drilling has a better surface quality and tool life than common drilling.