Roll ringIt is a part of the special-shaped roller body between the grooves or outside the grooves. The end roller rings located at both ends of the roller body can prevent the oxidation sheet from falling into the bearing; the intermediate roller ring located between two adjacent channels is mainly used to separate the channel and bear the lateral pressure. The basic parameters of the roll ring are the height of the roll ring and the width of the roll ring. The height of the roller ring is the depth of the groove. When determining the width of the middle roller ring, the strength of the roller ring and the convenience of installation and adjustment of the guide device are mainly considered.

The end roller rings located at both ends of the roller body can prevent the oxidation sheet from falling into the bearing; the intermediate roller ring located between two adjacent channels is mainly used to separate the channel and bear the lateral pressure. The basic parameters of the roll ring are the height of the roll ring and the width of the roll ring. The height of the roller ring is the depth of the groove. When determining the width of the middle roller ring, the strength of the roller 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 roller and the depth of the groove. The width of the middle roll ring of the cast iron roll open channel is generally equal to the depth of the groove in the middle of the two adjacent channels, which can be appropriately reduced for steel rolls or short rolls. In the closed roll, when the roll material is cast steel, the roll ring width can reach 0.8~1.0 times of the groove depth, and the cast iron roll can reach 1.2~1.5 times of the groove depth. When selecting the width of the support ring, the influence of the side pressure and the radius of the arc at the root of the support ring should be considered. When the side pressure is small and the root arc radius of the roller ring is large, a narrow roller ring width is required.

EndRoll ringThe width of the main choice based on experience. For small and medium-sized rolling mills, 50~100mm is generally selected; the size of the three-roll billet machine is 60~150mm; the size of the large and beam rolling mill is 100~150mm, and the rolling mill is 50~100mm. To determine the width of the roller ring, the installation and adjustment of the guide device should also be considered, depending on the thickness of the guide plate or the size of the guide plate box and the length of the adjusting screw and the size of the position required for operation.

Roller ring rolls are widely used in cantilever rolling mills. The stress of the roll ring roll in the rolling process is different from that of the ordinary rolling mill. The main reason for this is that the roller ring is an annular roller mounted on the roller shaft. If the roller ring is connected to the rolling roller shaft, the assembly stress of the roller ring needs to be generated. In the rolling process, the roller ring is in direct contact with the high-temperature rolling parts, and the thermal stress generated by the roller ring and the roller shaft is also different. At the same time, the roller ring should be subjected to rolling stress. Under the action of these stresses, the stress analysis of the roller ring can provide a theoretical basis for the correct installation and use of the roller, and improve the service life of the roller ring.

The thermal and assembly stresses are evenly distributed along the support ring, so any segment of the support ring can be selected for stress superposition. for the stress caused by rolling force, tensile stress is generated in the inner layer of AB section, compressive stress is generated in the outer layer, compressive stress is generated in the inner layer of cd section, and tensile stress is generated in the outer layer.

In the rolling process, rollingRoll ringby rolling stress, thermal stress and assembly stress. In order to ensure the safety of the roller ring, when the assembly stress is unchanged, the rolling stress and thermal stress should ensure the allowable value of the roller 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 difference.