Hot-rolling working roll temperature distribution obtaining method and device

Abstract

The invention discloses a hot-rolling working roll temperature distribution obtaining method. The method comprises the steps that the arrangement form of a hot-rolling working roll cooling injection system is constructed; a working roll heat exchange area is divided according to the arrangement form of the working roll cooling injection system; rolling process parameters and thermophysical parameters, including working roll parameters, rolled piece parameters, medium parameters and heat exchange coefficients, are acquired; axial-radial section grid nodes of the working roll are divided, and coordinate system parameters and a temperature calculation model of each node are established; a temperature calculation model is utilized, the heat exchange area where the section of the working roll is located is judged firstly every time calculation is conducted from the initial calculation position to the final calculation position, and then the temperature distribution of the section of the working roll at the position is calculated through a corresponding working roll temperature model. The method has the beneficial effects that the method is clear and definite, assumption and simplification conditions are few, the temperature field change of the working roll in the hot rolling process can be accurately forecasted, the calculation precision is higher than that of an analytical method,and the calculation speed is higher than that of a finite element method.

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-rolled work rolls is the basis for analyzing the thermal crown, thermal stress and spalling behavior of work rolls during hot rolling, and is also the premise for optimizing the design of work-roll cooling system, 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 heat transfer boundary conditions are complex, resulting in uneven temperature distribution. Therefore, the accurate prediction of the temperature distribution of the work roll has always been a hot topic Weaknesses in the rolling field. [0003] At present, the temperature calculation model of hot rolling work rolls is gen...

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