Roll Ring It is a part of the shaped roll body between or outside the grooves. The end face roll rings located at both ends of the roller body can prevent oxide scales from falling into the bearings; the intermediate roll rings located between two adjacent channels are mainly used to separate the channels and withstand lateral pressure. The basic parameters of the roll ring are the roll ring height and the roll ring width. The height of the roll ring is the depth of the groove. When determining the width of the middle roll ring, the strength of the roll ring and the convenience of installation and adjustment of the guide device are mainly considered.

　　The end face roll rings located at both ends of the roller body can prevent oxide scales from falling into the bearings; the intermediate roll rings located between two adjacent channels are mainly used to separate the channels and withstand lateral pressure. The basic parameters of the roll ring are the roll ring height and the roll ring width. The height of the roll ring is the depth of the groove. When determining the width of the middle roll ring, the strength of the roll ring and the convenience of installation and adjustment of the guide device are mainly considered.

　　The strength of the ring depends on the material of the roll and the depth of the groove. The width of the middle roll ring in the open channel of the cast iron roll is generally equal to the depth of the groove in the deepest part of the two adjacent channels. For steel rolls or short rolls, it can be appropriately reduced. In closed rolls, when the roll material is cast steel, the roll ring width can reach 0.8~1.0 times the groove depth, and the cast iron roll can reach 1.2~1.5 times the groove depth. When selecting the width of the support ring, the influence of the lateral pressure and the radius of the arc at the root of the support ring should be considered. When the lateral pressure is small and the root arc radius of the roller ring is large, a narrower roller ring width is required.

　　End Roll Ring The width is mainly selected based on experience. For medium and small rolling mills, it is generally selected as 50~100mm; for three-roll blooming mills, it is 60~150mm; for large and beam-type rolling mills, it is 100~150mm, and for primary rolling mills, it is 50~100mm. To determine the width of the roller ring, the installation and adjustment of the guide device should also be considered, which depends on the thickness of the guide plate or the size of the guide plate box, the length of the adjusting screw, and the size of the required position for operation.

　　Roll rings are widely used in cantilever rolling mills. The stress of roll rings during the rolling process is different from that of ordinary rolling mills. The main reason is that the roll ring is a ring-shaped roll installed on the roll shaft. If the roll ring is connected to the rolling roll shaft, the assembly stress of the roll ring needs to be generated. During the rolling process, the support roll ring is in direct contact with the high-temperature rolled workpiece, and the thermal stress generated between the support roll ring and the support roll shaft is also different. At the same time, the support roll ring should be subjected to rolling stress. Under the action of these stresses, stress analysis of the support roll ring can provide a theoretical basis for the correct installation and use of the support roll and improve the service life of the support roll ring.

　　Thermal stress and assembly stress are uniformly distributed along the support ring, so any section of the support ring can be selected for stress superposition. For the stress caused by rolling force, the inner layer of the ab section produces tensile stress, and the outer layer produces compressive stress; the inner layer of the cd section produces compressive stress, and the outer layer produces tensile stress.

　　During the rolling process, the Roll Ring is subjected to rolling stress, thermal stress, and assembly stress. To ensure the safety of the support roll ring, when the assembly stress remains unchanged, the rolling stress and thermal stress should ensure the allowable value of the support roll ring strength. For a roll sleeve of a certain material, its allowable value is constant. Therefore, according to the allowable value, the rolling state under different thermal stress and rolling stress can be obtained, that is, different temperature differences.