The quilted pipe adopts rolling process. Because the surface layer has residual surface compressive stress, it is helpful for the sealing of small cracks on the surface and hinders the expansion of erosion. In this way, the surface corrosion resistance can be improved, and the fatigue crack can be delayed or expanded, so the fatigue strength of the quilted grinding pipe can be improved. Roll forming, by forming a layer of cold work roll surface hardening layer, reducing the grinding pair of elastic and plastic deformation of the contact surface, thus improve the wearability of quilted grinding tube wall, at the same time avoid the burn caused by grinding. After rolling, the surface roughness can be improved by decreasing.

Rolling processing is a kind of chip processing, at room temperature using plastic deformation of metal, make the microscopic roughness on the surface of the workpiece rolling flat to change the surface structure, mechanical properties, the purpose of the shape and size. Therefore, this method can achieve both the goal of finishing and strengthening at the same time, which is impossible for grinding.

No matter what kind of processing method is used, the surface of the parts will always leave a small concave knife mark, and there will be staggered ups and downs.

Rolling processing principle: it is a kind of pressure finishing processing, is the use of metal in cold plastic deformation characteristics of normal temperature condition, using the rolling tool exert some pressure on the surface, make the surface of metal workpiece produces plastic flow, fill in to the original residual dips in the trough, and workpiece surface roughness value reduced. By rolling the surface layer of metal plastic deformation, make the surface cold hardening and grain fine and dense fibrous formation, and formation of residual stress layer, hardness and strength increase, so as to improve the surface wear resistance, corrosion resistance, and coordination. Rolling pressure is a plastic machining method without cutting.