The piston rod is a connecting part that supports the work of the piston. It is a moving part with frequent movement and high technical requirements, which is mostly used in the moving parts of the oil cylinder and the cylinder. Taking the hydraulic cylinder as an example, it is composed of cylinder, piston rod (cylinder rod), piston and end cover. The quality of its processing directly affects the life and reliability of the whole product.The machining requirements of the piston rod are high, the surface roughness requirements are Ra0.4 ~ 0.8μm, and the coaxiality and wear resistance requirements are strict. The basic feature of cylinder rod is elongated shaft processing, which is difficult to process and has been troubling the processing personnel.
The role of the piston rod.
The function of the piston rod is to connect the piston and the cross head, transfer the force acting on the piston and drive the piston motion.
Basic requirements for piston rod:
(1) to have enough strength, stiffness and stability;
(2) Good wear resistance and high machining accuracy and surface roughness requirements;
(3) Minimize the influence of stress concentration on the structure;
(4) ensure that the connection is reliable and prevent loosening;
(5) piston rod structure design to facilitate the disassembly of the piston
Processing technology
The piston rod is processed by rolling, so as to improve the corrosion resistance of the surface and delay the generation or expansion of fatigue cracks, so as to improve the fatigue strength of the cylinder rod. Through ROLLING FORMING, a cold hardening layer IS formed ON the rolling surface, which reduces the elastic and plastic deformation of the contact surface of the grinding pair, so as to improve the wear resistance of the cylinder rod surface and avoid the burn caused by grinding. After rolling, the surface roughness decreases and the mating properties are improved. At the same time, the friction damage to the seal ring or seal during piston movement of the cylinder rod is reduced, and the overall service life of the cylinder is improved. Rolling technology is a kind of high efficiency and high quality technology measure.
Process technology
The piston rod is processed by rolling, so as to improve the corrosion resistance of the surface and delay the generation or expansion of fatigue cracks, so as to improve the fatigue strength of the cylinder rod. Through ROLLING FORMING, a cold hardening layer IS formed ON the rolling surface, which reduces the elastic and plastic deformation of the contact surface of the grinding pair, so as to improve the wear resistance of the cylinder rod surface and avoid the burn caused by grinding. After rolling, the surface roughness decreases and the mating properties are improved. At the same time, the friction damage to the seal ring or seal during piston movement of the cylinder rod is reduced, and the overall service life of the cylinder is improved. Rolling technology is a kind of high efficiency and high quality technology measure.
Product usage:
The piston rod is mainly used in hydraulic pneumatic, construction machinery, automobile manufacturing piston rod, plastic machinery guide column, packaging machinery, printing machinery roller, textile machinery, transmission machinery axis, linear motion axis.
Post time: Feb-07-2023