根据三坐标测量机的特点 ,通过对漂移模型、虚拟边界要求及条件公差理论的剖析 ,在 ISO和国家标准的公差原则基础上 ,给出与标准相一致的、可用于孔轴类零件公差验证的软件量规数学等效式。这在 CAD与 CMM集成的自动检测系统中实现公差验证、实时数据分析和监视加工过程是有益的 According to the characteristics of CMM, based on the analysis of drifting model, virtual boundary requirement and conditional tolerance theory, based on the principle of tolerance of ISO and national standards, this paper gives the tolerance of hole axis parts Software gauge mathematical equivalent. This provides tolerance verification in automated inspection systems integrated with CAD and CMM, real-time data analysis and monitoring of machining processes.