The hydraulic cylinder and oil cylinder

Quilted grinding tube processing is to use rolling processing, steel pipe surface should leave some pressure, for tiny crack surface has good sealing effect, can prevent the erosion of the surface. So as to improve the corrosion resistance of the surface, and can reduce cracks and expand, it strengthened the compressive strength of quilted grinding tube. Roll forming of quilted through grinding tube, can form a layer of cold work hardening in the surface layer, reduce grinding pair of elastic and plastic deformation of the contact surface, thus improving the wear resistance, to avoid grinding burns. The surface roughness of the greatly reduced after rolling, improve the coordination of quilted grinding tube.

So-called rolling processing is a kind of chip processing, use of metal plastic deformation at room temperature, the surface roughness flattened, to change the surface structure, mechanical properties, the nature and size of the final goal. This is grinding cannot do the rolling processing technology, at the same time meet the requirements of finishing machining and strengthening.

Rolling processing principle is to use cold and plastic characteristics of metal under normal temperature condition, using the rolling tools for a certain amount of pressure, make the surface of metal workpiece produces plastic flow, thus reduce the workpiece roughness of surface. By rolling the surface layer of metal plastic deformation, make the surface cold hardening and grain fine and dense fibrous formation, improve the metal hardness and strength, improve the surface wear resistance, corrosion resistance, and coordination.