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为了使铣削的键槽能达到规定的不对称度,我们在此介绍一种找正轴中心的夹具。该夹具结构如图所示。使用方法如下:先把工件固定在立式铣床的工作台上,校对上、侧母线,大致找正轴中心。在机床主轴内装上找中心夹具,使百分表表头靠着工件一侧,上下移动工作台或立铣头主轴,到百分表上数值达最大值(如图)为止。然后,稍偏转主轴,使找中心夹具左右水平偏转,当百分表读数为最小值时,表示表头与主轴轴线已经垂直,记下百分表数值为 a。再降下工作台,使机床主轴连同找中心夹具旋转180°,至对称位置,重复上面测
In order to make the milling keyway to achieve the required degree of asymmetry, we introduce here to find a center axis of the fixture. The fixture structure as shown. Use as follows: First workpiece fixed on the vertical milling machine bench, proofreading, side bus, roughly find the center axis. In the machine tool spindle center to find the center fixture, so that the meter head on the side of the workpiece, move up and down the table or milling head spindle to the maximum value on the dial indicator (Figure) so far. Then, slightly deflected the spindle, so that the center fixture horizontal deflection, when the dial indicator reads the minimum, said the header and spindle axis has been vertical, note the dial indicator value a. Then lower the table, so that the spindle with the center of the machine to find the center of rotation 180 ° to the symmetrical position, repeat the above test