铰刀铰孔,刀刃同时起切削与挤光作用。但这两种作用并不等效,而是随切削条件(如润滑条件)的不同而异,或切削作用起主导地位;或挤光作用起主导地位。机理比较复杂。图1所示为各种润滑剂对铰孔精度、光洁度影响的几组实验数据。为什么不用润滑剂铰孔时,孔的光洁度差、尺寸精度低、孔径偏大?而使用润滑剂后光洁度和尺寸精度都可提高、孔径逐渐偏小甚至小于铰刀直径?这个问题仅仅用一般的切削 Reamer reaming, cutting at the same time the role of cutting and crowding light. However, these two effects are not equivalent, but vary with the cutting conditions (eg, lubrication conditions), or the cutting action dominates; or the squeezing action dominates. Mechanism is more complicated. Figure 1 shows a variety of lubricants reaming accuracy, finish several sets of experimental data. Why do not use the lubricant reaming, the poor hole finish, low dimensional accuracy, large aperture? Smooth and dimensional accuracy can be improved after the use of lubricants, the aperture is gradually smaller or smaller than the diameter of the reamer? This problem only with the general Cutting