我们在C0316转塔车床上加工φ2_0~(+0.02)mm的孔,其零件孔径与外圆的同轴度要求较高,且批量较大。故我们采用定心较好的特制φ2mm中心钻钻孔,开始我们用钻夹头装夹中心钻,但定位误差较大,孔径精度不易保证,后来我们采用了如图所示的专用夹具,其定位正确,钻孔精度得到保证,收到理想的效 We are in the C0316 turret lathe φ2_0 ~ (+0.02) mm hole, the hole diameter and parts of the coaxial requirements of the higher, and bulk larger. Therefore, we use centering a good special φ2mm center drill hole, drill chuck we start with the center drill, but the positioning error is larger, the aperture accuracy is not easy to guarantee, then we use the special fixture as shown, the Correct positioning, drilling accuracy is guaranteed, received the desired effect