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小直径深孔精加工是比较困难的,我们在加工图1液压阀主阀孔时采用整体式浮动铰刀,表面粗糙度可达到Rα1.6～0.8μm,再经过金刚石铰刀加工达到或超过图1要求。小直径浮动铰刀如按国标GB4254-80硬质合金可调节浮动铰刀结构设计制造,将给制造工艺造成较多问题(标准中铰刀最小直径为φ30mm)同时刀具成本增加,如采用自制加长机铰刀,则存在加工同轴度误差,为此笔者根据阀体材料,批量等方面的特点,设计了一种整体浮动铰刀(图2)。
Small-diameter deep hole finishing is more difficult. We use the integral floating reamer when processing the main valve hole of the hydraulic valve in Fig. 1. The surface roughness can reach Rα1.6～0.8μm, and then it reaches or exceeds through diamond reamer machining. Figure 1 requirements. Small-diameter floating reamer according to the national standard GB4254-80 carbide alloy adjustable floating reamer structure design and manufacturing, will cause more problems to the manufacturing process (standard reamer minimum diameter of φ30mm) at the same time increase the cost of the tool, such as the use of homemade extension Machine reamer, there is the error of processing coaxiality, for which the author designed an overall floating reamer according to the characteristics of the valve body material, batch, etc. (Figure 2).