我厂凸轮轴上的一个油孔,孔径φ20mm,深1030mm,原先是用一般麻花钻接长后钻削的。用这种钻头钻削,在切削过程中,必须间歇地将钻头自孔中退出,以清除切屑,其冷却条件差,劳动量大,生产效率低。后来改为图1所示喷射式强力排屑深孔钻钻削。在钻削过程中,切屑是用高压冷却润滑油从钻头 I plant a hole on the camshaft, aperture φ20mm, deep 1030mm, was originally used after the general twist drilled long after drilling. With this bit drilling, during the cutting process, the bit must be intermittently withdrawn from the hole to clear the chip, which has poor cooling conditions, heavy labor and low production efficiency. Later replaced by jet-type powerful chip removal shown in Figure 1 deep hole drilling. In the drilling process, the chip is high pressure cooling oil from the drill