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一分度蜗轮副是滚、插齿机的心脏,它决定着滚、插齿机的精度和齿轮加工质量。精度高于5级的分度蜗轮副需要用动态精度指标切向综合误差△F＇_i来衡量,这就需要单啮仪等动态测量设备来测量。在没有这些仪器时,可用周节累积误差△F_P,的测量来代替。对于模数 m=1～10,直径D=380mm,齿数小于100的蜗轮可直接用万能测齿仪以相对法测量,对于精度要求较高齿数>100,直径>380mm的蜗轮借助于圆转台及测齿仪测量托架组合装置用跨齿补点法测量。所谓跨齿测量就是指用比较法测量蜗轮周节时,测齿仪的两测量爪跨的齿数不少于两个,显然跨齿测量得到的周节累积误差小于单齿测量的累积误差,因此须进行补点,予以校
A sub-degree worm gear is rolling, gear shaper heart, it determines the roll, gear shaper accuracy and gear processing quality. Accuracy of grade 5 worm gear needs to use the dynamic accuracy of the tangential error △ F’_i to measure, which requires a single measuring device and other dynamic measuring equipment to measure. In the absence of these instruments, it is possible to use a measure of the accumulated accumulated error ΔF_P, instead. For the modulus m = 1 ~ 10, the diameter of D = 380mm, the number of teeth less than 100 can be directly measured with a universal tooth detector relative law, for the higher precision teeth> 100, diameter> 380mm worm gear by means of rotary table and Teeth measuring instrument combination measuring device with cross-fill point method to measure. The so-called cross-tooth measurement refers to the comparison method when measuring the circumference of the worm gear, the tooth measurement instrument two claws cross the number of teeth not less than two, apparently cross-tooth measurement of the cumulative error is less than the single-tooth measurement cumulative error, so To make up points, to be school