Back-up roll with adjustable and controllable interference

Abstract

The invention discloses a back-up roll with an adjustable and controlled interference, which comprises a core roll and a roll sleeve arranged outside the core roll. The core roll is provided with a through hole; one or a plurality of groups of electric heating assemblies are arranged in the through hole; the end part of the core roll is provided with a connecting flange and a slip ring for power supply and signal output; when the interference fit stress between the roll sleeve and the core roll is insufficient to meet the rolling requirement, even the roll sleeve and the core roll slide relatively, the core roll is subjected to power-up heating, a roll core generates radial expansion by the electric heating assemblies and the pre-tightening force between the roll sleeve and the core roll is increased; and a roll shape curve of a sleeved roll is regulated by powering up a plurality of groups of electric heating assemblies. The back-up roll disclosed by the invention adopts a sleeving structure. The roll sleeve can be made of a high-strength wear-resistance alloy material and the core roll can ba made of a forged steel (or cast steel) material with low price, so that the manufacturing cost can be greatly reduced. When the roll sleeve is seriously worn, the roll sleeve can be directly replaced and the core coll can be repeatedly used. When the combined back-up roll is used for regulating and controlling the plate crown or the plate shape, the roll shape can be sectionally regulated in an expansion control mode. According to the invention, by expansion of the core roll, the interference fit quantity value of the core roll and the roll sleeve is always maintained, so that the service life of the combined back-up roll can be greatly prolonged.

Description

technical field [0001] The invention relates to the technical field of steel rolling equipment in the metallurgical industry, in particular to a support roll with adjustable interference and roll shape. Background technique [0002] In the industrial production of plates and strips, the back-up rolls of large-scale cold and hot continuous rolling mills, and the back-up rolls of large-scale wide and thick plate mills play an important role in the production of steel rolling industry. It can reach 5000mm, and its strength, rigidity and heat treatment process are designed to ensure that the rolling mill can produce qualified products. As an important consumable in the steel industry, rolls directly affect product quality and production costs. In the large-scale roll forming manufacturing process, forged steel backup rolls are mostly supplied to users in the form of integral processing. In order to improve surface strength, hardness and wear resistance, medium frequency induc...

AI Technical Summary

Problems solved by technology

The problem to be solved by the present invention is to provide a support roll with adjustable interference, so as to...

Images