The piston rod is a connecting part that supports the work of the piston. Most of it is used in oil cylinders and pneumatic cylinder motion execution parts. It is a moving part with frequent movement and high technical requirements. Take the hydraulic oil cylinder as an example, which is composed of a cylinder barrel(cylinder tube) a piston rod (cylinder rod), a piston, and an end cover. The quality of its processing directly affects the life and reliability of the entire product. The piston rod has high processing requirements, and its surface roughness is required to be Ra0.4～0.8μm, and the requirements for coaxiality and wear resistance are strict.
The piston rod is processed by rolling, thereby improving the surface corrosion resistance, and can delay the generation or expansion of fatigue cracks, thereby improving the fatigue strength of the cylinder piston rod. Through roll forming, a cold work hardened layer is formed on the rolled surface, which reduces the elastic and plastic deformation of the contact surface of the grinding pair, thereby improving the wear resistance of the cylinder rod surface 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 during the movement of the air cylinder rod piston is reduced, and the overall service life of the pneumatic cylinder is improved. The rolling process is an efficient and high-quality process measure.
Piston rods are mainly used for hydraulic and pneumatic piston rods for engineering machinery, automobile manufacturing, guide posts for plastic machinery, rollers for packaging machinery, printing machinery, textile machinery, axis for conveying machinery, and linear optical axis for linear motion.
Post time: Nov-01-2021