加工深孔时排屑困难,冷却润滑液难以流入切削区,且由于刀具细长,刚性差,加工时容易引偏和产生振动,因此,加工孔的精度与表面粗糙度难以保证,尤其在普通机床上用常规刀具加工具有一定位置精度的深孔孔系,难度更大。我厂在生产BJ130汽车变速箱的上盖时(见图1工序简图),需要加工相互平行的三组φ16mm的同轴孔系。每组同轴孔的总深度为188mm,其中有效加工 Processing of deep holes difficult chip evacuation, cooling lubricant difficult to flow into the cutting area, and due to the slender tool, the rigidity is poor, easy to offset and vibration when processing, therefore, processing hole accuracy and surface roughness is difficult to guarantee, especially in the ordinary It is more difficult to machine the deep hole with a certain position accuracy by the conventional tool on the machine tool. I plant in the production of BJ130 car gearbox cover (see Figure 1 process diagram), the need to process parallel to each other three sets of φ16mm coaxial hole system. The total depth of each set of coaxial holes is 188mm, of which effective processing