主轴径跳的热误差分量分离及实验
Thermal Error Component Separation and Experiment of Spindle Radial Runout

为从机床主轴径向跳动中分离出热误差分量，提出一种沿圆周均布四点测量、采取周期截断差分处理来分离主轴径跳热误差分量的新方法。在某立式加工中心主轴径向均匀布置4个电涡流位移传感器和多个温度传感器获取测试数据，通过等周期截断并差分处理分离出热误差分量，再运用离散傅里叶变换分离出圆度误差和回转误差分量，结果显示热误差、圆度误差、回转误差分别为4.04 μm、5.30 μm、5.40 μm。
In order to separate the thermal error component from the radial runout of the machine tool spindle, a novel method is proposed to separate the thermal error components of the spindle by putting four sensors along the circumference of the spindle and using the method of the periodic truncation differential processing. The four-eddy-current displacement sensor and plurality of temperature sensors are arranged in the radial direction of a vertical machining center to obtain the test data. The thermal error components are separated by using equal cycle truncation and differential processing. In the end and the roundness error and rotation error components is separated by using discrete Fourier transform. The results show that the thermal error, roundness error and rotation error are 4.04 μm, 5.30 μm and 5.40 μm, respectively