Abstract:The molecular dynamics (MD) simulation method is used for comparative study of titanium nanovibration cutting and common cutting. In the same simulation conditions, the average cutting force of unidirectional vibration in X, Y direction is only about 1/3 of common cutting force. Compared with unidirectional vibration cutting, the elliptical vibration cutting (EVC) shear angle increases and the plastic deformation of cutting chip is reduced, at the same time the values of principal cutting force and thrust force are reduced. The cutting temperature change of EVC and unidirectional vibration cutting is following approximate sinusoidal pulse. Compared with common cutting, the temperature of vibration cutting dropped significantly. The average cutting temperature of workpiece in the EVC process is slightly higher than unidirectional vibration cutting.