基于逼近式定心法测量机床回转轴对导轨的平行度

为测量机床主轴回转轴线与同向导轨间的平行度，研制了一种基于激光位移传感器的机床测头，并结合逼近式孔心定位法提出一种新的平行度检测方法。该方法以回转轴线不变为前提，借助一标准环规，让环规的同一截面位于主轴轴线的不同点，利用两次精确定位所获得的坐标值，计算导轨和机床回转轴线的平行度。利用该检测方法，可消除实物芯轴类测量方法所涉及的一些缺陷，可在主轴高速旋转时完成测量。实验证明，该方法能够完成机床主轴轴线与同向导轨平行度的测量，有望作为一种新的检测手段对机床进行校验。

Measurement of Parallelism Between Rotating Axis and Guideway of a Machine Tool Based on Approximation Hole Center Positioning Method

For measuring the parallelism between the Z guide and the rotating axis of spindle on the machine tool, a new detection method which combines a machine tool probe based on laser displacement sensor with the approximation hole center positioning method is proposed. On the rule of keeping the rotating axis invariant, the same center of a ring gauge which lies on different points of the rotating axis is located twice and the obtained coordinate values can be used to calculate the parallelism. The detection method can eliminate some of the drawbacks involved in the measurement methods with the physical mandrel, meanwhile, they can achieve measurement as the spindle is rotating in high speed. The experimental results show that this method can complete parallelism measurement of the guide and the rotating axis of spindle, so it is expected to be a new means for the calibration of machine tools.