Evaluating the influence of geometric errors in rotary axes is a common method used by a five-axis machine tool for improving the machining accuracy. In conventional geometric error models, the table coordinate system is considered as the final workpiece coordinate system. In this study, an additional workpiece coordinate transformation was proposed to identify the influence of geometric error. First, a cubic machining test was conducted. Second, the necessity of workpiece coordinate transformation was analyzed, and a method for coordinate transformation was proposed. In addition, both machining simulation and an actual machining experiment of the cubic machining test were conducted to verify the efficiency of the proposed method. The results indicate that the workpiece coordinate transformation is an essential part of the geometric error model for accurately simulating the geometric error influence. The method for identifying the geometric error influence considering the workpiece coordinate transformation is applicable in manufacturing.

评估旋转轴上几何误差的影响是五轴机床用来提高加工精度的常用方法。在传统的几何误差模型中，工作台坐标系被视为最终工件坐标系。在这项研究中，提出了附加的工件坐标变换来识别几何误差的影响。首先，进行了三次机加工试验。其次，分析了工件坐标变换的必要性，提出了坐标变换的方法。另外，还进行了三次加工试验的加工模拟和实际加工实验，以验证所提方法的有效性。结果表明，工件坐标变换是精确模拟几何误差影响的几何误差模型的重要组成部分。考虑到工件坐标变换的几何误差影响的识别方法可用于制造。