How to choose pneumatic cylinder piston rod ?

May 21, 2024

Chromium Pneumatic Cylinder piston rod: a connecting component that supports the operation of the piston. Most of them are used for oil cylinders and cylinder motion execution components. It is a moving component with frequent movement and high technical requirements. For example, a hydraulic cylinder is composed of a Cylinder Barrel, a piston rod (hard chrome plated rod), a piston, and an end cap. The processing quality directly affects the lifespan and reliability of the entire product. The machining requirements for piston rods are high, with a surface roughness requirement of Ra0.4~0.8um, and strict requirements for coaxiality and wear resistance. The basic characteristic of cylindrical rods is to process slender shafts, which is difficult to process and has always troubled machining personnel.

The material of the chrome plated steel bar for the hydraulic cylinder is 45 # steel, which has been quenched and tempered, and the surface has been turned and polished before being chrome plated to a thickness of 0.03-0.05mm.

The Ck45 chrome plated piston rod is a connecting component that supports the operation of the piston. Most of them are used for oil cylinders and cylinder motion execution components. It is a moving component with frequent movement and high technical requirements. Taking a hydraulic cylinder as an example, it consists of a cylinder barrel, piston rod (cylinder rod), piston, and end cap.

The machining quality of hard chrome plated piston rods directly affects the service life and reliability of the entire product. High machining requirements for piston rods, with a surface roughness requirement of Ra0.4-0.8 μ m. Strict requirements for coaxiality and wear resistance.

We can also provide stainless steel piston rods.

Hard chromium piston rod: Stainless steel piston rods are mainly used for hydraulic and pneumatic, engineering machinery, and automotive manufacturing piston rods. The piston rod is processed by rolling. Due to the residual compressive stress left on the surface, it helps to close surface microcracks and hinders the propagation of corrosion. This improves the corrosion resistance of the surface and can delay the generation or propagation of fatigue cracks, thereby enhancing the fatigue strength of the cylinder rod. By rolling forming, a cold work hardening layer is formed on the rolling surface, reducing the elastic-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 decreases, which can improve the compatibility performance.
At the same time, it reduces friction damage to the sealing ring or sealing components during the movement of the cylinder rod and piston, and improves the overall service life of the cylinder. Rolling process is an efficient and high-quality process measure. Taking the rolling head with a diameter of 160mm (45 steel seamless steel pipe) as an example, the rolling effect was verified. After rolling, the surface roughness of the cylindrical rod decreased from Ra3.2-6.3um before rolling to Ra0.4-0.8um, the surface hardness of the cylindrical rod increased by about 30%, and the fatigue strength of the cylindrical rod increased by 25%. The service life of the oil cylinder has increased by 2 to 3 times, and the efficiency of the rolling process is about 15 times higher than that of the grinding process. The above data indicates that the rolling process is efficient and can greatly improve the surface quality of cylindrical rods.

Author:

Mr. WEIYINGSI

E-mail:

info@wyspneumatic.com

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18038711802