我厂生产的许多缸体、缸套、连杆等压缩机零件,大部分是35号钢、45号钢或铸铁的,内孔表面光洁度要求达到　　6～　　　7。在成批生产中,加工光洁度和同心度要求较高的深孔零件时,用一般镗削方法,很难达到要求。不仅效率低,而且由于工件长,刀杆容易振动,加工后很容易出现锥形口 Many of the cylinder block, cylinder liner and connecting rod compressor parts produced by our factory are mostly steel No.35, No.45 steel or cast iron, and the surface finish of inner hole is required to reach 6 ~ 7. In batch production, processing deep hole parts with high finish and concentricity requirements, with the general boring method, it is difficult to meet the requirements. Not only inefficient, but also because of the long workpiece, the shank is easy to vibrate, it is easy to appear after processing tapered mouth