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采用附图所示的小镗刀对直径为φ10～20毫米、长径比为5～8的内孔零件进行精加工,可获得▽▽_6以上的表面光洁度。刀片4有较长过渡刃 a 及修光刃 b,两者的交点为刀尖,加工时应使其位置较工件中心线高0.5毫米。由于过渡刃 a 与修光刃 b 不在同一平面位置上,故切入时分散了切削力,对加工有利(图中 c 为副切削刃)。刀片刃磨时前倾面上的月牙洼不宜太宽,以免切
The use of small boring tool shown in the drawings on the diameter of φ10 to 20 mm, the aspect ratio of 5 to 8 bore parts finishing, get ▽ ▽ _6 above the surface finish. Blade 4 has a longer transition edge a and wiper b, the intersection of the two points for the tip, the processing should make its position 0.5mm higher than the workpiece centerline. Because the transition edge a and the wiper b are not in the same plane position, cutting force is dispersed during cutting, which is advantageous for machining (c is the minor cutting edge in the figure). When razor blade razor blade on the surface of the crescent depression should not be too wide, so as not to cut