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滚切100齿以上的大质数齿轮,一般均采用差动分度法。选择分数1/P,则Z′=Z+(1/P) 分齿挂轮比=(分齿定数×k)/Z′ =(分齿定数×K)/(Z+(1/P) =(分齿定数×K×P)/(Z+P+1) 式中,Z—大质数齿数 K—滚刀头数 Z′—假设齿数 5≤|P|≤50 分子可以分解,分母能否分解,取决于相应Z所取P值是减适当。在实际工作中,往往需要试算若干次,才能找到适当的P值,因此,选择P值成为难点所在。
Hobs cut 100 teeth above the large prime number of gears, are generally used differential indexing method. Select the fraction 1 / P, Z ’= Z + (1 / P) divided by the gear ratio = (divided teeth fixed number k) / Z’ = (divided teeth fixed number K / Z + 1 / P = (Z + P + 1) where Z-prime tooth number K-hob head number Z’- assumed number of teeth 5 ≤ | P | ≤ 50 The numerator can be decomposed and the denominator can be decomposed , Depending on the P value of the corresponding Z is less appropriate.In practice, often need to try several times in order to find the appropriate P value, therefore, the choice of P value has become the difficulty.