随着液压控制的普遍应用,各种液压缸体零件不断增多,其内孔要求的精度及光洁度均较高。由于我科没有珩磨设备,几年来,液压缸内孔均采用精镗后精研的工艺,研磨棒分别采用铸铁或巴氏合金。去年开始,我们试制了石英砂研棒,取得了效率高、质量好的效果。石英砂研棒由芯子1,砂套2组成。其结构如附图。芯子1由45钢制成。在芯子两端制有中心孔;砂套2由石英砂、环氧树脂混合制成。环氧 With the universal application of hydraulic control, a variety of hydraulic cylinder parts continue to increase, the accuracy and finish of the hole requirements are higher. Because our department does not honing equipment, in recent years, the hydraulic cylinder bore are refined after boring lapping process, grinding rods were cast iron or Babbitt. Last year, we piloted a quartz sand research stick, achieved high efficiency, good quality results. Quartz sand research stick from the core 1, sand 2 sets. Its structure as the picture. The core 1 is made of 45 steel. At the core ends of the system has a center hole; sand 2 made of quartz sand, epoxy resin mixture. Epoxy