提高三点法测量精度的研究

目的 研究进一步提高三点法测量圆度及轴系运动误差精度的方法。方法 分析了测头读数及角位置误差对圆度各次谐波及圆周各点测量精度的影响，提出了三点法测量系统的优化策略与算法，研究了三点法测量误差的分布与传递规律；提出了克服测头定位误差以及３个测头的灵敏度不一致影响的软件校正方法。结果 圆度各次谐波的最大测量误差相对于传统三点法减小６７％，圆度及其各次谐波的测量不确定性明显降低。结论 该方法能明显提高三

A Study on Improving the Accuracy of(for Roundness and Spindle Motion Error Measurements with Three Point Method

Aim To improve the accuracy of measuring roundness and spindle mo tion error with three point method. Methods The effects of the reading error and the misalignment of the probes on the accuracy of measuring and all the harmonics of roundness were analyzed; The strategy and the algorithm for optimizing the parameters of the measuring system were proposed; The distribution and propagation patterns of the measured errors for all the harmonics of roundness were studied in detail; A software for correcting the errors caused by the measurement error of the angle positions of the probes and the sensitivity difference between three probes was presented. Results\ The maximum error of measuring the harmonics of roundness was reduced by 67% in comparison with that by the traditional three point method. Conclusion The accuracy of roundness measured by the improved three point method gets a distinct improvement.