What are the processing routes of hydraulic cylinders?

Hydraulic cylinder is an important executive element in the hydraulic system of construction machinery, which is used to perform reciprocating motion and drive construction machinery to complete various functions. The piston rod is the key force transmission part connecting the piston and the working part in the hydraulic cylinder, which has high technical requirements and needs to bear large tensile stress in the working process. Therefore, the piston rod must have sufficient strength, stiffness and toughness, and it is easy to wear due to wear in use, and it must also have high wear resistance.

The long cylinder piston rod is made of 45 steel, and its processing route is: forging (rolling)-blanking-tempering-straightening-machining-surface quenching, tempering-straightening-rod head welding-machining-grinding-stress relieving annealing-polishing-hard chromium plating-polishing-cleaning-assembly. Heat treatment of piston rod is a key process to ensure the internal quality and mechanical properties of piston rod. The quality of heat treatment is directly related to the life and reliability of the whole hydraulic system. If the heat treatment is improper, the piston rod will break prematurely and its parts will be damaged. In severe cases, it may cause the destruction of the whole equipment and casualties.