制造滚动轴承时,由于内环磨削余量达0.4—0.8毫米,须要花费大量的时间。为了提高生产率,可采用装立方氮化硼—P的铰刀来进行孔的粗加工,以便将磨削余量减少到0.15毫米。苏联古比雪夫工学院所属分院设计制造了一种装—P 的可调式铰刀,这种铰刀用来加工15钢轴承的淬火内环。直径10—40毫米的铰刀上焊接一块尺寸dh=4×4毫米的—P 立方氮化硼;直径40—100毫米的饺刀上用机械法夹固类似车刀上用的立方氮化硼插入式小刀头。焊接立方氮化硼的铰刀(图1)带锥柄, Rolling bearing manufacturing, due to the inner grinding allowance of 0.4-0.8 mm, it takes a lot of time. In order to improve productivity, the hole can be rough machined with a reamer of cubic boron nitride-P to reduce the grinding allowance to 0.15 mm. The branch of the Soviet Union Gubitchel Institute of Technology design and manufacture of a-P adjustable reamer, this reamer used to process 15 steel bearing quenched inner ring. A diameter of 10-40 mm on the reamer welded a piece of size dh = 4 × 4 mm -P cubic boron nitride; diameter 40-100 mm on the dumpling with a mechanical tool similar to the clamp on the cubic boron nitride Insert small knife head. Rectangular boron nitride reamer (Figure 1) with taper shank,