What Are The Requirements For The Quality And Endurance Of The Round Chrome Rod?

- Jul 16, 2019-

The round chrome rod can be applied to the hydraulic starting when it is used. The processing requirements of the product are relatively high, so the quality of the hydraulic cylinder is mostly the quality of the piston rod. The piston rod is the connecting part that supports the piston to do work, most applications Among the cylinder and cylinder movement executing parts, it is a moving part with frequent movement and high technical requirements.


The quality of the piston rod directly affects the life and reliability of the entire product. The piston rod has high processing requirements, and its surface roughness requirement is Ra 0.4 to 0.8 um, which requires strict requirements on coaxiality and wear resistance.


Although the piston rod is not intended to withstand the radial force from the viewpoint of the design idea, it is directly limited by the actual structure when it is used, and the piston rod of the hydraulic cylinder inevitably bears a considerable portion of its radial external force. For this reason, the length of the hydraulic cylinder piston must be appropriate, generally taking 0.7 to 1.0 times the outer diameter of the piston rod.


The piston rod increases its guiding action and increases the bearing surface area, so as to reduce wear and improve the service life of the hydraulic cylinder. The quality of the hydraulic cylinder depends largely on the quality of the piston rod. Therefore, the processing of the piston should be required. Geometric tolerance with sufficient accuracy.


Generally speaking, the outer diameter of the piston, the roundness of the inner hole, and the cylindricity error cannot be greater than half of the dimensional tolerance; the outer diameter of the outer diameter of the piston rod and the sealing groove should be within 0.02 mm. Generally, the vertical tolerance of the end face of the hydraulic cylinder to the axis of the hydraulic cylinder is less than 0.04 mm/100 mm.