This article mainly introduces:

Angola hydraulic cylinder,retractable cylinder manufacturer,retractable cylinder

(Angola retractable cylinder,produced by Hengyu Group）

retractable cylinder are widely used in Angola，because of simple structure and reliable operation，excellent temperature resistance，no transmission clearance.So our company has designed retractable cylinder for customers from Angola.

Introduction to retractable cylinder:

If the piston rod and retractable cylinder are stuck or the retractable cylinder is blocked, at this time, no matter how to operate, the retractable cylinder does not move or has little action. At this time, check whether the piston and piston rod seal is too tight, whether it enters the dirt and gum deposits: whether the shaft line of the piston rod and the retractable cylinder is in the center, whether the wearing parts and seals are invalid, and whether the load is too large.

The body of the retractable cylinder on the processing process requirements: the body of the retractable cylinder is an important and essential part of the retractable cylinder, because it has an irreplaceable role. The processing requirements for this part are very high, requiring that the surface roughness of the retractable cylinder after processing should reach 0.4-0.8um, and the coaxiality and wear resistance requirements are also very high.

After chrome plating of the piston rod of the retractable cylinder, the surface flatness is not fully treated: After chrome plating of the piston rod surface, the method of post-plating polishing should be changed to post-plating polishing. Although it is necessary to increase the thickness of the coating before grinding (generally increased by about 0.02 in the diameter direction), it can remove chrome plating defects well, and test the binding force of the coating. In addition, due to the micro-roughness of the grinding surface, the trough can store lubricating oil, which can improve the wear resistance and extend the service life.

retractable cylinder is the most important part of construction machinery, the traditional processing method is: broaching retractable cylinder block - fine boring retractable cylinder block - grinding retractable cylinder block. The rolling method is: broaching retractable cylinder block - fine boring retractable cylinder block - rolling retractable cylinder block, the process is 3 parts, but the time is compared: grinding 1 meter of the retractable cylinder block is about 1-2 days, rolling 1 meter of the retractable cylinder block is about 10-30 minutes. Input comparison: grinding machine or quilting machine (tens of thousands - millions), rolling knife (ten thousand - tens of thousands). After rolling, the surface roughness of the hole decreases from RA3.2-6.3 μm before rolling to Ra0.4 ~ 0.8μm, the surface hardness of the hole increases by about 30%, and the fatigue strength of the inner surface of the retractable cylinder increases by 25%. If the retractable cylinder life is only considered, it is increased by 2 to 3 times, and the boring and rolling process is 3 times more efficient than the grinding process In particular, if you want to make high-quality retractable cylinders, you must take the rolling production process. After the retractable cylinder is rolled, there is no sharp tiny edge on the surface, and long-term motion friction will not damage the seal ring or seal, which is particularly important in the hydraulic industry.

Answers to some questions about retractable cylinder:

By what means can the hydraulic system control the arbitrary stroke position of the rotary cylinder piston rod?
The following ways can be considered: 1, through the limit device, such as limit switch, position sensor, etc. 2, by feedback the pressure of the hydraulic oil in the cylinder. The load determines the pressure, the pressure in the cylinder is determined by the load, and the pressure is very small when the cylinder is unloaded. 2.1 When clamping the workpiece, the pressure of the cylinder increases, by calculating the relationship between the clamping force and the pressure of the cylinder, take a pressure value of the cylinder, set the pressure switch, and drive the valve to work when the pressure reaches the preset value, so that the oil circuit stops supplying oil. 2.2 or set the pressure value of the relief valve to overflow after a certain set pressure.

What is the rated pressure of the general cylinder?
This depends on the model of the cylinder, 1. The rated pressure of the light tie rod cylinder is 7 series 7MPa and 14 series 14MPa. 2. Rated pressure of engineering cylinder 16MPa. 3. Rexroth type metallurgical cylinder rated pressure 250MPa.