图1所示的压力油缸是液压机的关键部件,其加工质量的优劣,直接影响到液压机的精度及使用寿命。以往我厂加工的各种压力油缸,一般都采用两种加工方法,即:①内孔在φ120～φ250mm、深500～1000mm范围内的油缸,采用深孔磨削的加工方法。②内孔在φ200～φ700mm、深1000～2000mm以上的油缸,采用镗床镗削,然后滚压的方法。在加工过程中,小直径采用深孔磨削的工艺,这样对于尺寸公 The pressure cylinder shown in Fig. 1 is the key component of the hydraulic machine. The quality of its processing has a direct impact on the accuracy and service life of the hydraulic machine. In the past I plant a variety of pressure tanks, generally using two processing methods, namely: ① bore in the φ120 ~ φ250mm, deep 500 ~ 1000mm range of cylinders, the use of deep-hole grinding processing methods. ② the hole in the φ200 ~ φ700mm, deep 1000 ~ 2000mm above the cylinder, using boring machine boring, and then rolling method. In the process of processing, small diameter deep hole grinding process, so the size of the public