The cutting thickness model and the chip sector angle model for low frequency vibration assisted hole making with two cutting edges are established

the chip separation conditions are established

and the empirical formula between the chip sector angle and the cutting angle displacement is proposed. The chip shape analysis test was carried out

by which the corresponding relationship between the hole making parameters and the chip shape was obtained

and the A– f parameter combination range corresponding to the better chip shape was determined. The sector angle of the chip was measured

which was compared and analyzed with the theoretical calculation value

and the result shows that the established chip sector angle model has high accuracy for characterizing the actual chip shape.