Investigation of chip in vibration drilling

Up to the present, all published vibration drilling chip-breaking theories have considered that for zero-phase-difference axial vibration drilling (ZVD), major cutting-edge chip-breaking was impossible, and have not discussed the chisel-edge chip. In this paper, the extruding action of the rake and the flank have been considered, the possibility of the major cutting-edge chip-breaking in ZVD has been verified, the chisel-edge chip formation in vibration drilling has been analyzed, and theoretical chip graphs have been drawn. The new chip-breaking theory has been confirmed by vibration drilling experiments using aluminum and stainless steel.