A method and device for obtaining temperature distribution of hot rolling work rolls

Abstract

The invention discloses a method for obtaining the temperature distribution of hot-rolling work rolls, which includes constructing an arrangement form of a cooling spray system for hot-rolling work rolls; dividing the heat exchange area of ​​the work rolls according to the arrangement form of the cooling spray systems for the work rolls; obtaining rolling process parameters and Thermophysical parameters, including work roll parameters, rolling stock parameters, medium parameters and heat transfer coefficients; divide work roll axial-radial section grid nodes, and establish coordinate system parameters and temperature calculation models for each node; use temperature calculation models , from the initial calculation position to the end calculation position, each time the calculation is performed, the heat exchange area of ​​the work roll section is first determined, and then the corresponding work roll temperature model is used to calculate the temperature distribution of the work roll section at this position. The beneficial effects of the invention are as follows: the method of the invention is clear and definite, with few assumptions and simplified conditions, can accurately predict the temperature field change of the work roll during the hot rolling process, its calculation accuracy is higher than that of the analytical method, and its calculation speed is higher than that of the finite element method. faster.

Description

technical field [0001] The invention belongs to the technical field of hot-rolled strips, and in particular relates to a method and a device for obtaining temperature distribution of hot-rolled work rolls. Background technique [0002] The temperature distribution of hot rolling work rolls is the basis for analyzing the thermal crown, thermal stress and spalling behavior of work rolls during hot rolling, and it is also the premise for optimizing the design of work roll cooling systems, strip shape control and rolling schedule formulation. Because the work roll is affected by the high temperature strip and the cooling medium (cooling water, emulsion, air), the boundary conditions of heat exchange are complex, resulting in uneven temperature distribution. Therefore, the accurate prediction of the temperature distribution of the work roll has always been a hot Weak links in the rolling field. [0003] At present, the temperature calculation model of hot rolling work rolls is g...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for obtaining the temperature distribution of hot-rolled work rolls in view of the deficiencies of the prior art, so as to solve the problem that the existing hot-rolled work roll temperature distribution models have poor versatility, low calculation accuracy, and cannot quickly and conveniently adapt to engineering calculation requirements The problem

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