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在滚齿调整中,需要计算三组挂轮,即分度挂轮i_1、进给挂轮i_2和差动挂轮i_3。对于三组挂轮比的计算公式的推导,有关资料已有介绍,可以取用,并对符号选用原则略加说明。一、计算公式 i_1=A_1·Z_1/(Z+△Z)……(1) i_2=A_2·f……(2) i_3=(π·A_3)/Z_1(±(|△Z|)/f±(sinβ)/(π·m_n))……(3) 式中:A_1—滚齿机分度定数;A_2—滚齿机进给定数;A_3—滚齿机差动定数;f—滚刀垂直进给量(mm/r);Z_1—滚刀头数;Z—工件齿数;△Z—工件补充齿数(微齿数),|△Z|<1;β—工件分度圆柱上的螺旋角;m_n—工件法向模数。
In gear hobbing adjustment, it is necessary to calculate three sets of pinion wheels, that is, indexing pinion i_1, feed pinion gear i_2 and differential pinion gear i_3. For the derivation of the formula for calculating the three types of the ratio of the pendulums, the relevant information has been introduced and can be used, with a slight explanation of the principle of symbol selection. I. Calculation formula i_1 = A_1 · Z_1 / (Z + ΔZ) (1) i_2 = A_2 · f (2) i_3 = (π · A_3) / Z_1 (± (| ΔZ |) / f ± (sin β) / (π · m_n)) (3) Where: A_1-hobbing machine indexing; A_2-feeding gear hobbing machine number; A_3- gear hobbing differential fixed number; f- hob vertical feed (mm / Z - the number of hobs; Z - the number of teeth of the workpiece; Z - the number of teeth (microneedles) number.