花键联接设计计算方面的问题

向各位高手请教一个花键联接方面的问题：
渐开线花键联接设计计算中的齿形裕度的计算公式是什么？
按GB/T3478.1标准中，配合类别为H/h时，齿形裕度CF=0.1m，m为模数。但标准中没有说明其它配合类别的齿形裕度的计算公式，请知道的指点迷津，谢谢！

你就按照0.1m计算，当按照CF＝0.1m大于0.25时，或者CF＝0.1m小于0.05时，就按照CF＝0.001*D来计算计算，D为分度圆直径。

The form clearance, CF, shown in the basic rack profiles
is equal to 0.1 m for all pressure angle splines. The form clearance
is modified for fits other than H/h (See par. 8.8.2).
－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－
8.8.2 Application of Spline Fit Classes-The spline tables
in PART II of this standard are based on spline fit class H/h
which has a minimum effective clearance of zero. Selection of
a spline fit requiring a different minimum effective clearance
requires adjustment of the external spline dimensions as follows:
a) For the spline fit class selected H/h, H/f, H/e, or H/d,
determine the tooth thickness modification value (es) from
Table 4.
b) Reduce the maximum effective tooth thickness, SV
max, and the minimum actual tooth thickness, S min,specified
in spline tables, by the amount of the tooth thickness modification
(es) shown in Table 4.
c) Reduce external major and minor diameters (DEE rnax
and DIE min) by the value given in Table 5 according to the
selected spline fit class.
d) Calculate the required form diameter of the external
spline, DFE:


e) Calculate minimum and maximum dimensions over two
pins, external spline (MRE min and MRE max).
MRE min = MRE min* - (es) KE
MRE ma** = MRE min* - (es - T) KE
(*) MRE min values corresponding to values of fit class
H/h. (See PART II, dimension tables)
(**) MRE max values corresponding to values of fit
class H/h. (See Appendix A)
Values of KE factor are given in PART II, dimension
tables. These formulas are approximate.
Tooth thickness modification (es) values are given in
Table 4.
f ) Calculate minimum and maximum base tangent length
over k teeth, external spline (W min and W max).
Values of minimum and maximum base tangent length
over k teeth are given for the fit class H/h in PART III.
Table 4-Tooth Thickness Modification (Reduction)-in Mirometers-(sr) Resulting from Selected Spline Fit Classes
1 pn = 0.001 mm
  

  

意思就是说H/h公差等级的变化规律就是DFE的规律变换。根据DEF公式带表四的公差等级对应的数字计算就可以。

实用中，这个参数不重要，根本不作为检验参数，因为小模数花键配合齿顶和齿底的间隙在0.3-0.5mm左右。
所以使用中参照2楼的公式基本就可以解决问题。
希望可以给你带来帮助。

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