What are the technical requirements of cylinder analysis from four aspects?

For the cylinder presumably we must have paid attention to for a long time, but also some understanding of the cylinder for the manufacturer of technical personnel and those requirements. Presumably we do not know much about this, in fact, it is also related to the quality of the cylinder when we buy it. At the same time, we can also identify the quality of the cylinder we purchased according to its technical requirements. Next, Hangzhou Neumann will analyze the technical requirements of the cylinder from four aspects.

One, piston rod

Technical requirements: Heat treatment: after rough machining, hardness 229-285 hb, such as high-frequency quenching hardness 45-55 hrc. Roundness tolerance values can be selected according to the accuracy of 9 and 10 or 11 end vertical tolerance values should be selected according to the accuracy of 7, cylindricity tolerance values should be selected according to the accuracy of 8, radial runout tolerance values of 0.01 mm. Machining accuracy in piston rod threads is 6 degrees, but if the load and mechanical vibration is small, can be processed according to 7 or 8 grade accuracy, if there is a connecting pin hole piston rod,H11 connecting pin hole aperture.

Two, exhaust device

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

(1) The hydraulic cylinder has been doing repeated movement, so that the movement is smooth, but this method is not reliable. the

(2) An exhaust plug fitted with a hydraulic cylinder is located at one end of the hydraulic cylinder.

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

Iii. Technical requirements for cylinder block:

1. Surface roughness: piston rubber sealing ring seal, roughness 0.1-0.4 um; Piston is sealed with piston ring, roughness 0.2-0.4 oh.

2. Cylinder inner diameter roundness tolerance value can be selected according to 9 and 10 or 11 accuracy level, perpendicularity selection end according to 7 level accuracy tolerance value. If the cylinder is a threaded connection between the cylinder block and the head, the thread should select metric thread accuracy for class 6.

3. Corrosion In order to prevent the cylinder, improve the service life, usually in the cylinder is coated with a layer of chromium layer thickness of 30-40, and then after grinding and polishing treatment, in order to be complete.

4. Used for cylinder materials, there are certain requirements, as follows: sufficient strength and impact toughness, but also good solderability can be.

Four, guide sleeve

Material: Cast bronze or wear-resistant cast iron.

Technical requirements: guide bush diameter is generally H8/f9,Ra0.63um- 1.25um surface roughness.

The above is the different requirements of different aspects of the cylinder, you can use as a reference