为了铰制1:100的φ5、φ9锥孔,对常规设计、制造的铰刀作了分析,并进行改制,经使用效果很好。原铰刀结构如图1所示,通过现场观察和分析,发现铰刀圆锥面上刃带超差,有的宽度达0.3毫米之多,并且刃带上的后角等于零。根据金属切削原理可知,要使较宽的刃带刺入工件,必须有足够 In order to hinge 1: 100 φ5, φ9 tapered bore, the conventional design, manufacture of reamers were analyzed, and the restructuring, the use of good results. The original reamer structure shown in Figure 1, through the field observation and analysis found that reamer conical surface margin over tolerance, and some width of 0.3 mm as much, and the land clearance is equal to zero. According to the principle of metal cutting shows that, to make a wide band piercing the workpiece, there must be enough