1. If the cylinder piston (piston) rod is 40, the cylinder diameter is 50, and the cylinder stroke is 1480, then which one should be used in the piston rod material quality?
If the cylinder piston (piston) rod is 40, the cylinder diameter is 50, and the cylinder stroke is 1480, then 40cr should be used for the material quality of the piston rod. If it does not bear the lateral force, and it is to be tempered Processing (chǔ lǐ). The 45# piston rod connects the piston and the crosshead to transmit the force acting on the piston and drive the piston to move. If it is subject to lateral forces, it can only be considered and selected (xuanze).
2. Piston rod, the outer diameter (outer diameter) tolerance is f7 & mdash; f8, what is it?
If the outer diameter (outer diameter) tolerance of the piston rod is f7 & mdash; f8, then the outer diameter tolerance of the piston rod is indicated, optionally f7 or f8. When the hollow piston rods have the same material and the cross-sectional area is equal, the hollow piston rod has stronger torsion resistance and can withstand large external moments. The cylinder piston rod wear ring can improve the guiding of the cylinder, reduce the wear of the piston seal and reduce the frictional resistance. Where f is the tolerance of the axis, ie the position of the tolerance band, and the number is the tolerance class. As for the value of the bias value, it is necessary to look up the table according to the diameter of the piston rod. In turn, to get accurate numbers, the electric flat car can also avoid mistakes.
3. In the cylinder, the piston rod and the cylinder tube are generally why? And, what is the reason for the longitudinal scratch on the piston rod?
In the cylinder, the cooperation between the piston rod and the cylinder tube is mainly for the clearance fit, and the piston ring mainly serves as a sealing function. The hydraulic piston rod cylinder, the piston rod (cylinder rod), the piston and the end cover are composed of several parts. The piston rod of the cylinder has a piston rod at one end, and the air supply from the side of the piston generates air pressure, and the air pressure pushes the piston to generate a thrust and returns by the spring or the self weight. As for the longitudinal scratches on the piston rod, it is caused by particulate impurities in the hydraulic oil of the cylinder. And, by (tōng guò) it can be used to judge the quality of the Chrome plated (Chromium) on the surface of the piston rod, and then determine whether it is related to the quality of chrome plating.

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