在铣床上加工斜齿圆柱齿轮时,必须使用分度头来加工螺旋角,即把分度头的侧轴与铣床工作台丝杠连接起来。但有时也会遇到还需要分度头来解决齿轮的差动分度问题,这时一个分度头就无能为力了。过去常常用近似分度法解决分度问题,比较麻烦,精度也较差,我们采用下述方法可解决这一难题。即使用两个分度头,一个用作差动分度,一个与机床工作台丝杠连接(图1)。 先将两个分度头主轴找好在同一中心线上,然后压紧分度 When machining helical spur gears on a milling machine, the indexing head must be used to machine the helix angle, ie the side shaft of the indexing head is connected to the table screw of the milling machine. But sometimes also meet the need for indexing head to solve the problem of differential indexing gear, then a sub-head can do nothing. In the past, the indexing method was often used to solve the indexing problem, which was troublesome and poor in precision. We adopted the following method to solve this problem. Even with two indexing heads, one for differential indexing and one for the machine table screw (Fig. 1). First two indexing spindle to find good in the same center line, and then tighten indexing