In the process of using the hydraulic cylinder in the hydraulic system, the hydraulic cylinder drive has a certain quality mechanism. When the product moves to the end of the stroke, it has a greater kinetic energy. If there is no alkali treatment, the piston of the hydraulic cylinder and the cylinder head will have a mechanical collision, resulting in impact, noise and destruction.

In order to mitigate and prevent the occurrence of such hazards, the hydraulic cylinder can be set up in the hydraulic circuit deceleration device or buffer device in the cylinder block. As the main parts of hydraulic cylinder, single pillar, hydraulic support, gun barrel and other products, the quality of processing directly affects the life and reliability of the whole product. Cylinder processing requirements are high, its inner surface roughness requirements for RA0.4-0.8& UM, coaxiality and wear resistance requirements are strict. The basic characteristic of cylinder barrel is deep hole machining, which has always puzzled the machining personnel.  

Hydraulic cylinder to a certain extent is mainly used rolling processing, to a certain extent due to the surface layer has a residual compressive stress, which is conducive to the closure of surface micro cracks, so that to a certain extent, impede the expansion of erosion. Thus, the surface corrosion resistance can be improved and the fatigue strength of the cylinder can be improved by delaying the generation or expansion of fatigue cracks.

Hydraulic cylinder through its rolling molding, its rolling surface will directly form a layer of cold hardening, which can effectively reduce the grinding pair contact surface of the elastic and plastic deformation, thus improving the wear resistance of the cylinder inner wall, while avoiding the burn caused by grinding. After rolling, the matching property can be improved by reducing the surface roughness.

Hydraulic cylinder to a certain extent, is the main parts, engineering machinery, after rolling hole before the roll surface roughness by building Ra3.2 6.3 um decreases as Ra0.4 0.8 & um, the surface hardness of the hole increased about 30%, within the cylinder surface fatigue strength increased by 25%, the service life of the oil cylinder, if only considering the cylinder increase 2-3 times, breach cutting rolling process is grinding process efficiency about three times. The above data shows that the rolling process is efficient and can greatly improve the surface quality of cylinder.