What are the technical requirements of cylinder from four aspects

1.Piston rod

Technical requirements: heat treatment: after rough machining, the hardness is 229-285 Hb, such as high frequency quenching hardness 45-55 HRC. The roundness tolerance value can be selected according to the accuracy 9 and the vertical tolerance value at the end of 10 or 11. The roundness tolerance value shall be selected according to the accuracy level 7, the cylindricity tolerance value shall be selected according to the accuracy of 8, and the radial run out tolerance value 0.01mm. The machining accuracy of the piston rod thread is 6 degrees, but if the load and mechanical vibration are very small, it can be processed according to the accuracy of Grade 7 or 8. If there is a connecting pin hole piston rod, the hole diameter of H11 connecting pin hole can be processed.

2.Exhaust

The exhaust device is used to exhaust the hydraulic cylinder in two ways, as follows:

(1) the hydraulic cylinder always makes repeated movement to make the movement stable, but this method is not reliable. Of

(2) an air vent plug is installed on one end of the hydraulic cylinder.

Technical requirements: heat treatment hardness of cone is 38-44hrc.

3.Technical requirements for cylinder block:

• Surface roughness: the piston rubber seal ring is sealed with a roughness of 0.1-0.4 mm; the piston is sealed with a piston ring with a roughness of 0.2-0.4 mm.

• The roundness tolerance value of the inner diameter of the cylinder can be selected according to the accuracy level of 9 and 10 or 11, and the perpendicularity selection end according to the tolerance value of level 7 accuracy. If the cylinder is a threaded connection between the cylinder block and the cylinder head, the thread should select the accuracy of the metric thread for level

• Corrosion in order to prevent the cylinder and improve its service life, a layer of chromium layer with a thickness of 30-40 is usually coated in the cylinder, and then it is grinded and polished to be complete.

• For cylinder materials, there are certain requirements as follows: enough strength and impact toughness, but also good weldability.

4.Guide sleeve

Material: cast bronze or wear-resistant cast iron.

Technical requirements: the guide sleeve diameter generally adopts the surface roughness of H8 / F9, Ra0.63um - 1.25um.

The above is the different requirements of different aspects of the cylinder, you can as a reference. Of course, the cylinders of our company all meet these technical requirements, but also pay attention to the usage and maintenance. If you want to know more about the cylinder, you can check it on the official website of Ningbo smaetsolu. At the same time, we want to choose cylinder, gas-liquid cylinder, cylinder accessories can consult customer service on the official website to buy!