在学习外地经验的基础上,结合生产需要,我厂制造并使用了六齿无刃铰刀(图示)。几年来的生产实践证明,这种铰刀具有较好的技术经济效果。如:我厂加工产品零件(HT 21～40材料的下溜板)上φ50×100毫米和φ42×100毫米孔,不管是通孔还是盲孔(不通孔),精度均可达2级,表面光洁度为▽7。 Based on the learning experience in the field, combined with production needs, our factory made and used a six-tooth bladeless reamer (pictured). Years of production practice has proved that this reamer has good technical and economic results. Such as: my factory processing products parts (HT 21 ~ 40 material under the slide) on the φ50 × 100 mm and φ42 × 100 mm hole, either through-hole or blind hole (no hole), the accuracy can reach 2, the surface Finish is ▽ 7.