Hydraulic cylinder, is a kind of output force and effective area of the piston and the pressure difference between the two sides is proportional to the linear motion of the executive element. The hydraulic cylinder is basically composed of cylinder cylinder and cylinder head, piston and piston rod, sealing device, buffer device and exhaust device. Its dynamic principle is the PASCAL’s principle which converts hydraulic energy into mechanical energy. The actual input of hydraulic cylinder is calculated by fluid flow and pressure value, and the output energy is calculated by linear motion speed and force, plus a little useless power consumption. The piston of hydraulic cylinder can complete the reciprocating periodic motion on a straight line, and the periodic displacement of the motion is limited. This component is an energy conversion device that converts hydraulic energy into reciprocating linear motion of mechanical energy. The oil cylinder is the most important part of construction machinery. The traditional processing method is: broaching cylinder body — fine boring cylinder body — grinding cylinder body. The rolling method is as follows: broaching cylinder body — fine boring cylinder body — rolling cylinder body. After rolling, the roughness of hole surface decreases from Ra3.2 ~ 6.3um to Ra0.4 ~ 0.8&um before rolling. The surface hardness of hole increases by about 30%, and the fatigue strength of cylinder inner surface increases by 25%. If the service life of oil cylinder is only considered the influence of cylinder cylinder, the efficiency of boring and rolling process can be improved by about 3 times compared with that of grinding process. The above data shows that the rolling process is efficient and can greatly improve the surface quality of the cylinder.
Cylinder after rolling, there is no sharp small edge on the surface, long time of friction will not damage the sealing ring or seals, this is particularly important in the hydraulic industry.
Hydraulic cylinder is available for lifting, bending, straightening, extrusion, shear, riveting and welding, jacking, stretching, disassembly, punching, construction steel bar extrusion, bridge, construction machinery and other operations.
Oil cylinder is mainly used for supporting heavy objects for a long time. It can support heavy objects when removing oil pressure, and it is safe and reliable. It can be used under water, single action, load retraction, nut self-locking to make the load safer, especially in large engineering. It is easy to operate and control and self-locking jack, designed with safety pressure retaining device, built-in pressure relief valve to prevent overload, to protect the self-locking jack for safe operation. The connection of the device, the use of high pressure hose and threaded joint connection, with the use of fast, and overcome the shortcomings of rapid traditional joint oil leakage is mainly used for power, construction, machinery manufacturing, mining, railway bridges, shipbuilding and other industries equipment installation and removal operations.