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在铣床上铣齿条的分度方法,一般是在分度头主轴后端与工作台丝杠之间挂轮分度的,这样分度是通过分度头1:40的蜗轮副传动。每次分度时曲柄转数多,而且对于不同模数一般都要更换挂轮,辅助时间长,生产效率低。为了克服这些缺点,我们改为分度头侧轴与工作台丝杠之间挂轮,不必计算,不必更换挂轮,分度操作简便,现介绍如下:如图1,在分度头原固定指数板的地方装上定位插销(图2),在指数板外圆上钻四个等分圆锥孔,与插销锥度相配合,整个传动系统见图3。在分度头侧轴上挂上Z_1=22的齿轮,工作台丝杠挂上Z_2=42的齿轮,中间配上适当的中间轮,齿数任意,分
Milling on the milling machine rack indexing method, usually in the indexing spindle between the back end of the table and the feed screw between the indexing, so indexing is through the indexing 1:40 worm gear drive. Each indexing crank when the number of revolutions, and for different modulus generally have to change the wheel, aids a long time, low productivity. In order to overcome these shortcomings, we change to the indexing head side table and the feed screw between the table, do not have to calculate, do not have to change the hanging wheel, indexing is simple and convenient, are introduced as follows: Figure 1, The index plate is equipped with a locating bolt (Figure 2). Four bisecting conical holes are drilled on the outer circle of the index plate to match with the taper of the bolt. See Figure 3 for the whole transmission system. Z1 = 22 on the side of the indexing shaft hanging gear, table screw Z2 = 42 gear, the middle with the appropriate intermediate wheel, any number of teeth, points