The quilting pipes are processed by rolling. Since the surface layer has residual compressive stress on the surface, it helps to close the micro cracks on the surface and hinders the expansion of erosion. Thereby improving the corrosion resistance of the surface, and delaying the occurrence or expansion of fatigue cracks, thus improving the fatigue strength of the quilted grinding tube. Through rolling forming, a layer of cold hardening layer is formed on the rolling 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 honing tube and avoiding burns caused by grinding . After rolling, the reduction in surface roughness values improves fit properties. Rolling processing is a kind of chip-free processing. At room temperature, the plastic deformation of metal is used to flatten the microscopic unevenness on the surface of the workpiece to achieve the purpose of changing the surface structure, mechanical properties, shape and size. Therefore, this method can achieve the two purposes of finishing and strengthening at the same time, which cannot be achieved by grinding. No matter what kind of processing method is used, there will always be tiny uneven knife marks on the surface of the part, and there will be staggered peaks and valleys. The principle of rolling processing: it is a kind of pressure finishing processing, which uses metal to The cold plastic characteristics of the state, using the rolling tool to apply a certain pressure on the surface of the workpiece, so that the metal on the surface of the workpiece produces plastic flow, and fills it into the original residual low concave trough, so as to reduce the surface roughness of the workpiece. Due to the plastic deformation of the rolled surface metal, the surface structure is cold hardened and the grains are thinned, forming a dense fiber shape and forming a residual stress layer, increasing the hardness and strength, thereby improving the surface quality of the workpiece.
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