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Hydraulic piston rods use various benefits of rolling
Aug 17, 2018

The hydraulic piston rod is processed by rolling. Because the surface layer has surface residual compressive stress, it helps the surface micro-crack closure, hinders the expansion of erosion, thereby improving the surface corrosion resistance and delaying the generation or expansion of fatigue cracks. Therefore, the fatigue strength of the hydraulic piston rod is improved.


Through roll forming, the rolling surface of the hydraulic piston rod forms a cold hardened layer, which reduces the elastic and plastic deformation of the grinding contact surface, thereby improving wear resistance and avoiding burns caused by grinding. After rolling, the surface roughness of the hydraulic piston rod is reduced to improve the fit. At the same time, the friction damage to the sealing ring or the sealing member when the piston of the hydraulic piston rod is moved is reduced, and the overall service life of the hydraulic cylinder is improved.


When disassembling the hydraulic cylinder, care must be taken to prevent damage to the threads at the top of the hydraulic piston rod, the cylinder threads and the surface of the hydraulic piston rod. It is strictly forbidden to hammer the cylinder and the surface of the piston. For example, there is a loss of the cylinder hole and the surface of the piston. It is not allowed to be sanded with sandpaper.


In order to extend the life of the hydraulic piston rod, the hydraulic cylinder and the surrounding environment should also be kept clean. The oil tank should be sealed to prevent pollution; the pipeline and fuel tank should be cleaned to prevent falling iron oxide and other debris; clean cloth or special paper should be used for cleaning, and twine and adhesive should not be used as sealing material.

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