微细孔超声振动钻削加工方法研究

Research on Drilling Method of Ultrasonic Vibration in Micro-hole

为解决采用∅0.5 mm直柄麻花钻钻削加工高压共轨喷油器控制阀微细孔时由于微细钻头刚性差,在钻削过程中易出现偏摆和断裂现象,导致控制阀微细孔加工精度难以保证和控制的问题,应用有限元分析的方法以及超声振动原理,开展超声振动钻削过程中钻削刃运动轨迹分析及轴向振动钻削过程的分析研究。通过∅0.5 mm微细孔超声振动辅助钻削的仿真实验研究分析与验证,选取确定适合超声振动切削参数的超声振动钻削工艺方法,可以满足高压共轨喷油器控制阀微细孔尺寸加工精度高的要求。

When using the∅0.5 mm straight shank twist drill drilling micro hole machining of high pressure common rail injector control valve,in order to solve phenomena of deflection and fracture occurred in the drilling process due to poor rigidity that leaded to valve micro hole machining precision was difficult to guarantee and control,the method of finite element analysis and the principle of ultrasonic vibration were used to carry out analysis of the ultrasonic vibration cutting blade in the process of drilling trajectory and axial vibrating drilling process.By means of research analysis and verification of∅0.5 mm micro-hole ultrasonic vibration assisted drilling simulation experiment,the method of ultrasonic vibration drilling technology suitable for ultrasonic vibration cutting parameters was selected to meet the requirements of high pressure common rail injector control valve micro-hole size processing precision.