在圆轴料上钻一中心孔是困难的,而在共上钻一偏心孔同样更困难。图示在制造一可调压板中如何完成这一加工的。在圆轴所要加工的部位处打上冲头眼后,该孔先用1/3时钻头,大体上着手打中心孔,深度为1/8时;然后,工件在台钳上转位,为的是1/2时起始孔靠适当的修正,以使螺纹底孔钻(螺孔钻)及3/8时钻头将穿过圆环上 It is also difficult to drill a center hole in the round shaft material, and it is also more difficult to co-drill an eccentric hole. Illustrates how to do this in the manufacture of an adjustable pressure plate. After punching the eye on the part where the round shaft is to be machined, the hole is first drilled with a 1/3 drill bit and the center hole is roughly set at a depth of 1/8. Then, the workpiece is indexed on the vice Yes 1/2 The starting hole is properly modified so that the thread bottom hole drill (screw hole drill) and 3/8 bit drill bit will pass through the ring