通常在钻床上钻孔时,由于切削条件较差,钻头的温升很快,特别是钻深孔,效率很低。当钻屑塞满钻头的导屑槽时,切削扭矩增大,钻头磨损很快,这对于小直径的深孔钻削就更加不利,因而钻头折断现象会经常发生。为了防止钻头的折断,不得不在加工过程中频繁退刀,清除钻屑、冷却钻头。 When drilling a hole on a drilling machine, the temperature of the bit increases rapidly due to poor cutting conditions, and in particular, deep-hole drilling is inefficient. As drill bits fill the drill bit guide flutes, the cutting torques increase and the drill bits wear quickly, which is even more detrimental to small diameter deep hole drilling, which can occur frequently. In order to prevent the drill off, had frequent retraction in the processing, removal of drill cuttings, cooling drill.