The piston rod is a connecting part that supports the work of the piston. Most of it is used in oil cylinders and cylinder motion execution parts. It is a moving part with frequent movement and high technical requirements. At the same time, it is also an important part of the gas-liquid pressurized cylinder equipment, and it will directly affect the use of the entire equipment. Take the hydraulic cylinder as an example, which is composed of cylinder barrel, piston rod (cylinder rod), piston, and end cover. The quality of its processing directly affects the life and reliability of the entire product. The basic feature of the cylinder rod is the processing of a slender shaft, which is difficult to process and has always troubled the processing personnel. So, will the quality of the piston rod affect the stability of the hydraulic pneumatic cylinder? Next, we will analyze this problem together. When the piston rod is used in a hydraulic gas-liquid booster cylinder, we must ensure its processing quality. Under normal circumstances, the processing requirements of the piston rod are very high, the surface roughness is required to be Ra0.4 ~ 0.8um, and the requirements for coaxiality and wear resistance are also very strict. Although from a design point of view, the piston rod is expected to bear the radial force, but due to the limitation of the actual structure, it has to bear part of the radial force. Therefore, in order to meet the requirements of normal use, when making the piston rod, it is necessary to ensure that its length is appropriate. Generally speaking, the length value is controlled to be 0.7 to 1.0 times the outer diameter (outer diameter) of the piston rod. between. This is mainly to enhance its guiding effect, and at the same time, it can also expand the force area to minimize the degree of wear (a basic type of component failure), and ultimately increase the hydraulic pressure cylinder as much as possible. The length of time used. After a certain amount of research, it is found that the machining quality of the piston rod will have a very important influence on the stability of the hydraulic pneumatic cylinder. Therefore, Jiuli requires the piston rod to ensure high machining accuracy (precision). At the same time, the deviation should be reduced as much as possible to prevent adverse effects. In addition, because the piston rod of the hydraulic gas-liquid booster cylinder will bear a large load when it is pulled in a multi-pull state, it must be designed in accordance with its actual use requirements. In the multi-pressure state, it needs to have good longitudinal stability.
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