我厂变速箱体(材料HT20—40)上的Φ14拨叉轴孔,在铰削中出现孔表面粗糙、沟痕和环状刀纹等缺陷,阀体(材料HT20—40)上的Φ20阀杆孔,铰削中出现直纹刀痕,有时还研磨不光。针对铰削中出现的弊病,我们研制了交错齿铰刀,如图1,图中1、3、5号齿为校准齿,2、4、6号齿为挤压齿。本铰刀使用效果很好。交错齿铰刀是在普遍铰刀的校准部分增加了挤压齿,同时又吸取了单刃硬质合金铰刀一齿切削两齿导 The Φ14 yoke shaft hole on the gearbox body (material HT20-40) in our factory has defects such as rough surface, groove marks and annular knives in the reaming. The Φ20 valve on the valve body (material HT20-40) Rod holes, reaming saw knives trace marks, sometimes grinding is not only light. Reaming for the emergence of the ills, we developed a staggered reamer, shown in Figure 1, the figure 1, 3, 5 teeth for the calibration of teeth, 2,4,6 teeth for the extrusion of teeth. This reamer works well. Interleaved reamer reamer in the universal part of the increase in the extrusion teeth, while drawing a single-edged carbide reamer a tooth cutting two-tooth guide