Computing method for roll profile of steckel mill

Abstract

The invention relates to a method for calculating the roll shape in the field of metallurgy, in particular to a method for calculating the roll shape of a steckel mill. The invention adopts the calculation method which influences a function method or a finite element method, and considers designing the original roll shape of rolls on the basis of abrasion and thermal expansion of the rolls under the condition of certain rolling procedures. The method calculates the rolling force and the deflection and wafering of working rolls and supporting rolls according to the rolling procedures, and thencalculates the rolling force, the contact pressure between the rolls and the thickness distribution conditions of rolling pieces so as to obtain reasonable roll shape of which the pressure between the rolls is reasonably distributed and the plate convexity meets the requirements, of the supporting rolls and the working rolls, and the roll bending force. By adoption of the method to design the supporting rolls and the working rolls, the pressure distribution state between the rolls of the supporting rolls and the working rolls can be obviously improved, spallation of the rolls is inhibited, and simultaneously the plate convexity requirement can be met.

Description

technical field The invention relates to a calculation method of a roll profile in the field of metallurgy, in particular to a calculation method for a roll profile of a steckel mill. Background technique When the rolling method is used to produce metal sheets and strips, reducing the radius of the rolls can reduce the rolling force, but at the same time it also reduces the bending resistance of the rolls, making the cross-section of the rolled piece more convex, that is, the convexity of the plate becomes larger , leading to product failure in severe cases. In order to reduce the rolling force while suppressing roll bending, the steckel mill adopts a four-high rolling mill, that is, a pair of work rolls with a smaller diameter and a pair of backup rolls with a larger diameter, and the back-up rolls are pressed against the work rolls. On the surface, the back-up rolls are mounted on the mill stand through the back-up roll chocks. During rolling, the deformation of the roll...

AI Technical Summary

Problems solved by technology

In order to improve the force between the rolls, a certain amount of chamfering can be applied to the support rolls, but during the rolling process, the pressure between the rolls at the chamfers is too large, especially in the middle and late stages of the work cycle of the rolls. The pressure between the rolls rises even more. Figure 3 is the distribution of the pressure between the rolls along the roll body direction (L) when the backup rolls are chamfered rolls and the work rolls are flat rolls. There is still a risk of peeling off the rolls here.

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