双盘式渐开线测量仪测点位置调整方式

分析了双盘式渐开线测量仪中测点位置偏差对渐开线齿形测量的影响,探讨了高精度调整测点位置的两种方法:试验调整法与误差补偿调整法。试验调整法是根据测点偏离导轨平面测量渐开线齿形时,测量结果中齿形角小于实际值的原理,调整测头处于不同位置并测量渐开线齿形,齿形角最大的测量曲线对应的测点位置即为最佳位置。误差补偿调整法是在测点处于高于导轨平面的两个位置时,分别测量同一渐开线齿形,通过对测点偏移量逐次试值,补偿两次测量结果,使得测量结果中齿形偏差相同,获得测头偏移量。分析得出,上述两种方法调整测头位置的极限偏差分别为±0.010 mm和±0.015 mm,均可满足1级(GB/T10 095.1-2 001)渐开线齿形的测量要求。

Adjustment of stylus in double-disc involute measuring instrument

The measurement error caused by the stylus position deviation in the double-disc involute measuring intrument was analyzed, and two methods,the test method and the error compensation method, for adjusting the stylus position accurately were introduced. In test method, with the angle of tooth profile being less than its real value when the stylus deviates the rails surface,the same involute tooth profile is measured repeatedly when the stylus is at different positions. The result shows that the stylus is in the best position when the angle of the tooth profile is maximal. In the error compensation method, the involute tooth profile is measured when the stylus is at two different positions over the rails,the results are compensated by attempting different values of the stylus deviation to get two results same, and the real deviation value can be obtained. The limited deviations of the two methods for adjusting the stylus position are ±0.010 mm and ±0.015 mm, which can meet demands for measuring level 1(GB/T10 095.1-2 001) involute tooth profile.