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拉光刀结构如图1所示,刀杆1带有四个互成45°的槽子,带球状工作表面(其半径等于被加工孔半径)的柱形压光元件3成对地安装在心轴2上。槽子的位置和槽数使压光元件在被加工孔上形成完整的截形,如图2所示。为了补偿槽子在刀杆上制造的误差(槽子应严格地按刀杆轴对称),压光元件的宽度比计算值大1毫米。为了加工方便,在刀杆外表面对应槽子处铣成平面,距离和对称度要求严格的心轴孔是在误差不大于0.02毫米的座标镗床上加工的。两个相邻压光元
The cutter mechanism is shown in Fig. 1. The cutter bar 1 is provided with four grooves 45 ° in from each other. Cylindrical calendering elements 3 with a spherical work surface having a radius equal to the radius of the machined hole are mounted in pairs on the spindle 2 on. The location of the trough and the number of slots make the calendering element form a complete truncation on the hole being machined, as shown in FIG. 2. In order to compensate for the error of the troughs being made on the arbor (the troughs should be exactly axisymmetric to the arbor), the width of the calendering element is 1 millimeter greater than the calculated value. In order to facilitate the processing, in the outer surface of the cutter bar corresponding to the milling plane, distance and symmetry required mandrel hole error is less than 0.02 mm coordinate boring machine processing. Two adjacent calenders