0Cr17Ni4Cu4Nb超声振动钻削的钻削力和切屑研究

Study on Drill Thrust and Chip in Ultrasonic Vibration Drilling of 0Cr17Ni4Cu4Nb

针对深小孔钻削过程中存在轴向力和扭矩较大、断屑排屑效果差、刀具易磨损等问题,通过建立轴向振动钻削运动数学模型,分析了超声振动钻削的钻削力和断屑机制。在设计的超声轴向振动钻削试验装置上对0Cr17Ni4Cu4Nb不锈钢材料进行了普通钻削和超声振动钻削深小孔加工试验,对比分析了轴向力、扭矩和切屑形状。实验结果表明:与普通钻削相比,超声振动钻削降低了轴向力和扭矩,获得了良好的断屑和排屑效果,提高了钻削过程的稳定性,延长了刀具的使用寿命。

To solve the problems consisted of big axial force and torque,poor chip breaking and chip removing,cutting tools abrasion easily of micro deep hole drilling,the drill thrust and chip breaking mechanism of ultrasonic vibration drilling are analyzed by building the axial vibration drilling motion mathematical model.The conventional drilling and ultrasonic vibration drilling micro deep hole machining experiments of 0Cr17Ni4Cu4Nb stainless steel were tested by using the designed ultrasonic axial vibration drilling experimental device.And the axial force,torque and chip shape were analyzed by comparison.The experimental results indicate that compared with the conventional drilling,in the ultrasonic vibration drilling process,the axial force and torque are reduced,the excellent effects of chip breaking and chip removing are obtained,the stability of drilling process is increased,and service life of the tool is prolonged.