精密车削二维微位移刀架研究

设计了一种微米级切削加工的微位移刀架,该刀架可满足数控车床精密加工的需要。该刀架以压电微位移致动器为动力源,以双平行四杆柔性铰链为弹性导轨,以最大输出位移为主要参数,设计了微位移刀架的结构,计算和选择了微位移刀架的结构参数。通过理论建模和有限元分析,对该铰链机构的系统刚度进行了计算,并对二维微位移刀架的输出位移进行实验测试。实验结果表明:理论计算结果、有限元仿真计算结果与实验测试数据吻合,验证了设计方法的可行性。

2-D Micro-displacement Turret of Ultra-precision Lathe

The micro-displacement turret of ultra-precision CNC lathe was designed, which could meet the needs for precision machining. The power source of the turret was piezoelectric displacement actuators. The guide of the turret was double parallel four-pole flexible hinge institution. The main parameters of the turret were the maximum output displacement. The structure of micro-displacement turret was designed and calculated. The stiffness of flexible hinge institution was calculated by theoretical modeling and finite element analysis, and the output displacement of 2-D micro-displacement turret was tested. The results showed that the results theoretical calculations, finite element simulation coincided with experimental data, which could verify the reliable of the design method.