The structure of the rolling tube is simple and the sealing effect

- Mar 22, 2019-

The rolling pipe is the main body of the hydraulic cylinder when it is used, and the inner hole is generally manufactured by precision machining processes such as boring, reaming, rolling or honing pipe (also called cold drawing tube, honing pipe), so that the piston and its piston The sealing member and the support member can smoothly slide to ensure the sealing effect and reduce the wear; the hydraulic cylinder cylinder is subjected to a large hydraulic pressure, and therefore, should have sufficient strength and rigidity.

The end caps of the rolling tube form a closed oil chamber at both ends of the cylinder and the cylinder, so the end cap and its connecting parts should have sufficient strength. The design must consider both the strength and the structural form with better craftsmanship. The guide sleeve guides and supports the piston or the plunger. Some hydraulic cylinders do not have a guide sleeve and are directly guided by the end cover hole. This structure is simple.

The rolling tube is rolled, and the surface layer has surface residual compressive stress, which can help the surface of the micro crack to close and prevent the expansion of the erosion. Thereby increasing the surface corrosion resistance and reducing the occurrence or expansion of fatigue cracks, thereby increasing the fatigue strength of the honing pipe. By roll forming, the rolled surface forms a cold hardened layer that reduces the elastic and plastic deformation of the grinding contact surface while preventing damage due to grinding. After rolling, the surface roughness value is reduced to increase the blending