Four-high mill plate control work roll curve design method for strip rolling

Abstract

The invention discloses a roll-shaped curve design method for work rollers in a four-roller rolling machine sheet profile control work for tape and sheet rolling treatment. The method is optimized to design in the premises of guaranteeing the equivalent convex that is necessary for tape steel sheet profile control effects, and meanwhile, with the constraint conditions of the wearing volume of rollers being the minimum and roller axial resistance being the minimum. With the help of the axial movement of the vertical work rolls in the roll shape, it is possible to continuously modify the equivalent convex of roll seams, so as to meet the requirements for controlling the shapes of sheets produced by rolling tape steel of different materials and sizes. It is shown in actual application that, utilization of the roll-shaped rollers can effectively control profile quality of different types and sizes of tape steel sheets, and meanwhile, lower the wearing cost in roller utilization process. Besides, since the axial resistance is lowered during the working process of the rollers, the invention can further increase the utilization period of the rollers and rolling machine mechanical devices.

Description

technical field [0001] The invention belongs to the field of steel rolling, and in particular relates to a method for designing a roll shape curve of a four-high rolling mill for plate shape control and work roll. Background technique [0002] With the development of technology and the increasing requirements of users on the shape quality of strip rolled products, the use of continuously variable crown rolls is becoming more and more popular. The advantage of the continuously variable crown roll is that the equivalent crown of the roll gap can be changed by the axial movement of the roll according to the steel type, thickness, and width specifications of the strip without changing the roll, so as to achieve the effect of strip shape control. [0003] However, there are some problems in the design of common continuously variable crown rolls. First, the curve design of the rolls does not take into account the influence of axial resistance during the roll traverse process. Sin...

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Problems solved by technology

[0004] Another problem in the design of the continuously variable crown roll is that while considering the equivalent crown, the impact of the roll curve roll diameter difference on the production process is not considered, resulting in a large roll diameter difference on the variable crown roll surface

In this way, while the grinding cost of the roll increases, the wear of the roll during the rolling process also increases, resulting in a shortened service life of the roll

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