【摘要】 在考虑到钻头的复杂几何形状的同时，采用三维实体元即8节点元构造了微小钻头的有限元模型，并根据此模型对振动钻削时钻头的寿命进行了研究，揭示了振动钻削提高钻头寿命的机理．更多还原

【Abstract】 Taken into account complex drill geometry, 3-D finite element model developed for thetwist drill is presented. The effects of dynamic torque in vibration drilling on the twisting deformationfor the drill are analyzed. The drill life is studied using the model, and the mechanics of improvingdrill life are clarified.更多还原