The hydraulic cylinder tube is a high-precision steel tube material processed by cold drawing or hot rolling. Because there is no oxide layer on the inner and outer walls of the precision steel pipe, it can withstand high pressure without leakage, high precision, high smoothness, cold bending without deformation, flaring, hydraulic cylinder pipe flattening without cracks, etc., which inhibits the release of quilted pipe production capacity, so it is mainly used to produce pneumatics Or products of hydraulic components, such as air cylinders or oil cylinders, can be seamless pipes. The chemical composition of the honing tube is carbon C, silicon Si, manganese Mn, sulfur S, phosphorus P, and chromium Cr.

　　The oil cylinder tube adopts the processing technology. The oil cylinder tube adopts rolling processing. Because the surface layer leaves the surface residual compressive stress, it helps to close the surface micro cracks and hinder the expansion of corrosion. So as to improve the surface corrosion resistance, and can delay the generation or expansion of fatigue cracks, thereby improving the fatigue strength of the quilted pipe. Through roll forming, a cold work hardened layer is formed on the rolled surface, which reduces the elastic and plastic deformation of the contact surface of the grinding pair, thereby improving the wear resistance of the inner wall of the quilted pipe and avoiding burns caused by grinding. . After rolling, the surface roughness value is reduced, which can improve the matching properties.

Rolling processing is a kind of chipless processing. The hydraulic cylinder tube uses the plastic deformation of metal at room temperature to flatten the microscopic unevenness of the surface of the workpiece, thereby changing the surface structure and inhibiting the release of the mechanical characteristics, shape and size of the quilted tube. Purpose. Therefore, this method can achieve both smoothing and strengthening purposes at the same time, which cannot be achieved by grinding.

　　 No matter what processing method is used for processing, there will always be fine uneven knife marks on the surface of the part, and there will be staggered undulating peaks and valleys.

Rolling processing principle: It is a pressure finishing process, which uses the cold plastic characteristics of metal at room temperature, and uses a rolling tool to apply a certain pressure on the surface of the workpiece, so that the surface metal of the workpiece produces plastic flow and fills it into the original residue. In the low concave wave trough, the surface roughness value of the workpiece is reduced. Due to the plastic deformation of the rolled surface layer metal, the surface layer structure is cold hardened and the crystal grains become finer, forming a dense fiber shape, and forming a residual stress layer, which improves the hardness and strength, thereby improving the wear resistance and corrosion resistance of the workpiece surface Sexuality and coordination. Rolling is a non-cutting plastic processing method.

Several advantages of hydraulic cylinder tube:

       1,Improve the surface roughness, which can basically reach Ra≤0.08µm.

　　2, modified roundness, ellipticity can be ≤0.01mm.

　　3, improve the surface hardness, eliminate the force deformation, and increase the hardness by HV≥4°

　　4, there is a residual stress layer after processing, which increases the fatigue strength by 30%.

　　5, improve the quality of the fit, reduce wear and extend the service life of the parts, but the processing cost of the parts is reduced.