Due to requirements of high-precision geometric tolerances for some high precision products, forming errors and clamping errors are unavoidable in the machining process. In this paper, an on-position measurement method is proposed for position error compensation based on the combination datum theory. Firstly, the mathematical representation model of the coaxiality of parts with the shallow holes is constructed based on the combination datum theory. Secondly, an on-position measurement method is proposed with constructing the mathematical model of the profiles of the surfaces based on laser displacement sensors (LDSs) to calculate the coaxiality error of parts on-position based on the combination datum theory. Based on it, the position of the spindle of the machine are adjusted to present the clutter again to compensate for position errors of the holes. Finally, the experimental results demonstrate the effectiveness and correctness of the proposed position error compensation method based on the on-position measurement device.

由于一些高精度产品对高精度几何公差的要求，在加工过程中不可避免地会出现成型误差和装夹误差。本文提出了一种基于组合基准理论的位置误差补偿在位测量方法。首先，基于组合基准理论构建了浅孔零件同轴度的数学表示模型。其次，提出了一种基于激光位移传感器(LDS)构建表面轮廓数学模型的在位测量方法，基于组合基准理论计算零件在位同轴度误差。以此为基础，调整机器主轴的位置，重新呈现杂波，以补偿孔的位置误差。最后，实验结果证明了所提出的基于在位测量装置的位置误差补偿方法的有效性和正确性。