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介绍了坐标测量机测量齿轮形位偏差不确定度的评估思路及计算方法，通过试验找出了坐标测量机测量齿轮参数的主要不确定度来源，并阐述了提高测量准确度的途径及如何确定被测齿轮的精度级别
This paper introduces the evaluation method and calculation method of uncertainty of gear shape position error of CMM, and finds out the main sources of uncertainty for measuring CMM parameters through tests. It also discusses the ways to improve the accuracy of measurement and how to determine Accuracy level of the measured gear