我厂生产液压机构蓄能器的缸筒(简称“蓄压筒”),技术要求如图1。由于40 Cr 钢切削性能差,长期来,加工光洁度只能达到5～6。为保证产品质量,改用以下加工方法,收到了较好效果。管坯(159×14毫米无缝钢管)经下料,然后,在一般车床或镗床上粗镗内孔至134.2毫米(留细镗余量0.8毫米)和车 I plant the hydraulic cylinder accumulator cylinder (referred to as “pressure cylinder”), the technical requirements shown in Figure 1. As 40 Cr steel cutting performance is poor, long-term, processing finish can only reach 5 to 6. To ensure product quality, use the following processing methods, received good results. The billet (159 × 14 mm seamless steel pipe) was blanked, and then, the bore was coarsely bored on a general lathe or boring machine to 134.2 mm (with a fine boring allowance of 0.8 mm) and the car