Stainless steel piston rods are mainly used for piston rods for hydraulic and pneumatic, engineering machinery, and automobile manufacturing. The piston rod is processed by rolling. Because the surface layer leaves the surface residual compressive stress, it helps to close the micro cracks on the surface and hinder the expansion of corrosion. Thereby improving the surface corrosion resistance, and can delay the generation or expansion of fatigue cracks, thereby improving the fatigue strength of the cylinder rod. Through roll forming, a cold hardened layer is formed on the rolled surface, which reduces the elastic and plastic deformation of the grinding contact surface, thereby improving the surface of the cylinder rod and avoiding burns caused by grinding. After rolling, the surface roughness value is reduced, which can improve the matching properties. At the same time, the friction damage to the sealing ring or the sealing element when the cylinder rod piston moves is reduced, and the overall service life of the cylinder is improved.

The main purpose

Stainless steel piston rods are mainly used for piston rods for hydraulic pneumatics, engineering machinery, automobile manufacturing, roller shafts for packaging machinery, printing machinery , textile machinery, shafts for conveying machinery, and linear optical shafts for linear motion.

Features introduction

The piston rod is processed by rolling. Since the surface layer has residual compressive stress on the surface, it helps to seal the tiny cracks on the surface and hinders the expansion of erosion.
Therefore, the corrosion resistance of the surface can be improved, and the generation or expansion of fatigue cracks can be delayed, thereby improving the fatigue strength of the cylinder rod. Through roll forming, a cold work hardening layer is formed on the rolling surface, which reduces the elastic and plastic deformation of the contact surface of the grinding pair, thereby improving the wear resistance of the surface of the cylinder rod and avoiding burns caused by grinding. After rolling, the reduction of surface roughness value can improve the fit properties. At the same time, the friction damage to the seal ring or the seal when the cylinder rod and piston moves is reduced, and the overall service life of the oil cylinder is improved. The rolling process is a high-efficiency and high-quality process measure, and the brand-cut rolling head (45 steel seamless steel pipe) is an example to prove the rolling effect. After rolling, the surface roughness of the cylinder rod is reduced from Ra3.2~6.3um to Ra0.4~0.8um before rolling, the surface hardness of the cylinder rod is increased by about 30%, and the surface fatigue strength of the cylinder rod is increased by 25%. The service life of the oil cylinder is increased by 2 to 3 times, and the rolling process is about 15 times more efficient than the grinding process. The above data shows that the rolling process is efficient and can greatly improve the surface quality of the cylinder rod.