各种液压或气动缸体的内孔不仅要有较高的几何精度,而且还要有较高的表面硬度,以增加耐磨性。对缸体内孔的加工,一般均采用滚压工艺,这对较大内孔缸体效果较好。对于小孔径缸体,由于滚压头制造困难,特别是较长缸体,因较长连接杆刚度不 All kinds of hydraulic or pneumatic cylinder bore not only have higher geometric accuracy, but also have a higher surface hardness, in order to increase the wear resistance. The hole in the cylinder processing, are generally used rolling process, which works better for larger bore bore. For small-bore cylinders, due to the manufacture of rolling head is difficult, especially the longer cylinder, due to the longer connecting rod stiffness