Rolling processing is a kind of chipless processing. After a certain method of rolling things, a certain pressure is applied to the surface of the workpiece. The plastic deformation of the metal is used at normal temperature to smooth out the microscopic unevenness of 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 together.
After the surface of the metal workpiece is rolled, the surface layer is strengthened, the ultimate strength and the yield point are increased, and the use performance, fatigue strength, wear resistance and corrosion resistance of the workpiece have been significantly improved. After rolling, the hardness can be improved by 15-30%, and the wear resistance can be improved by 15%. Rolling processing can improve the surface roughness from Ra6.3 to Ra2.4～Ra0.2. And it has a higher production efficiency, and some workpieces can be completed in minutes or seconds. Rolling processing can solve the key problem that some technological methods are not easy to realize. For example, the processing of extra-large cylinders. At the same time, it is also suitable for finishing of extra-small holes or finishing of some special materials.
Rolling processing has a wide range of applications and can be used in large, medium and small factories. No matter in terms of processing quality, production efficiency, production cost, etc., rolling processing is a relatively superior processing method. In some respects, it can completely replace finishing processes such as fine grinding, grinding, and honing. Now, according to the processing methods that external force is transmitted to the rolling material, it can be divided into three types: mechanical, rolling and spring type. According to the processing nature, it can be divided into two types: light finishing and strengthening processing.