超声振动辅助钻削P20轴向力与入口边缘质量性能研究

Simulation and Experimental Study of Ultrasonic Vibration Assisted Drilling P20

针对P20在传统钻削中存在轴向力大和入孔边缘质量差的问题,提出运用超声振动辅助钻削来改善。使用Deform-3D模拟钻削过程,设计对比、单因素以及不同冷却剂仿真实验,研究轴向力的变化,并通过搭建的实验平台,对刀具施加50 kHz超声频,研究对比传统钻削和超声振动辅助钻削在不同加工参数及冷却剂下轴向力和入孔形貌的变化。研究表明:超声振动辅助钻削可有效减小轴向力、改善入孔边缘质量;随着主轴转速的增加,轴向力减小,入孔边缘质量先变好后变差,随着进给速度的增加,轴向力增大,入孔边缘质量变差;选择油基类型冷却剂可减小轴向力、提高入孔边缘质量。

In view of the problems of large axial force and poor hole edge quality in the traditional drilling of P20,the ultrasonic vibration assisted drilling is proposed to improve it.DEFORM-3D was used to simulate the drilling process,and the comparison,single factor and different coolant simulation tests were designed to study the change of axial force;through the established experimental platform,50 kHz ultrasonic frequency was applied to the tool,to study the variation of axial force and hole entry morphology in the two machining methods,different machining parameters and coolant.The results of the study showed that ultrasonic vibration assisted drilling can reduce the axial force and improve the hole entry edge quality;with the increase of the spindle speed,the axial force increases,and the quality of the hole entry edge quality becomes better first and then worse,and with the increase of feed speed,the axial force decreases and the quality of the hole entry edge becomes worse;the choice of oilbased coolant can reduce the axial force and improve the quality of the hole entry edge.