在电器装配的生产实践中,我们采用一种钻孔专用刀具来钻电缆接线盒中的接线卡套用薄壁孔,其刀具外径大小取决于接线卡套的外径尺寸。这种刀具由高速钢制成,分别车成大小不同直径(见图示),整个刀具体开成三处刀具切削前刃,前角为零,后角也为零(如能铲背制有一个小后角效果更佳)。这种刀具可以用于如JZ3-13式 In the electrical assembly of production practice, we use a special drilling tool to drill the cable box wiring box thin walled hole, the tool diameter depends on the size of the outer diameter of the sleeve. The tool is made of high-speed steel, respectively, car into different sizes (see the picture), the entire body of the knife body into three cutting front cutting edge, the front angle is zero, the clearance angle is also zero A small corner effect better). This tool can be used as JZ3-13 type