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为了在滚齿机上加工出符合要求的大质数斜齿轮,我们以Y38滚齿机为例来讨论这一问题。当在滚齿机上加工齿数为大质数z的斜齿轮时,因机床挂轮中不备有大质数z倍数的齿轮,所以,也要象加工大质数正齿轮时那样,要选择一个既能找到挂轮,又与这个大质数z相近的假想齿数z′,来计算分齿挂轮比。由Y38滚齿机传动系统图可得出分齿挂轮计算公式为:
In order to work on the gear hobbing machine to meet the requirements of the large number of helical gears, we take the Y38 hobbing machine as an example to discuss this issue. When the gear hobbing machine processing a large number of teeth z helical gear, because the machine is not equipped with a large number of gear zz round of the gear, so, as well as the processing of large prime sprockets, as to select a can not find linked Round, and the imaginary number of teeth z that is close to this large prime number z ’, to calculate the gear ratio. Y38 hobbing machine by the transmission system diagram can be derived from the gear wheel gear is calculated as: