Finite element and finite difference coupling method for fast calculating rolled piece section temperature

Abstract

The invention discloses a finite element and finite different coupling method for fast calculating rolled piece section temperature. The method includes the steps of firstly, mapping finite element grids before rolling of each gate with finite difference grids before rolling, and transmitting finite different grid node temperature before rolling to the finite element grids before rolling according to position relations; secondly, transmitting finite element node temperature before rolling to finite element nodes after rolling, and adding rolling temperature rise; thirdly, performing finite difference grid division on rolled pieces according to the finite element grid data of the rolled piece after the rolling of each gate, and judging in-surface, out-surface and boundary point positions; fourthly, mapping the finite element grid node temperature to finite difference nodes according to position relations; fifthly, using finite difference grids to perform gap temperature calculating after rolling. By the method, the instant temperature fields at optional moment during rolling of the rolled pieces with various sections can be calculated fast, calculation speed is increased greatly, manual intervention is not needed, and high automation level is achieved.

Description

technical field [0001] The invention belongs to the technical field of rolling, in particular to a finite element and finite difference coupling method for quickly calculating the section temperature of a special-shaped rolling piece during hot rolling. Background technique [0002] Temperature is one of the most important parameters during rolling. Since the temperature directly affects the rolling force and the bending of the rolled piece, accurate prediction of the temperature at each stage of the production process is the key to controlling rolling and cooling. The finite element method used in production in the past takes a long time to calculate and is only suitable for the online temperature calculation of strips and rods with simple sections, and it is difficult to adapt to the temperature calculation of various steel sections with complex sections. When using finite element method to calculate the temperature field of complex section rolled piece, it takes too much...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcoming that the finite element method for calculating the temperature of a rolled piece with complex sections takes too long and is difficult to automate, overcome the shortcoming that the finite difference method cannot predict the law of metal flow before and after rolling, and improve the calculation efficiency of the section temperature of the rolled piece. Speed ​​and degree of automation, a finite element and finite difference coupling method for fast calculation of rolling section

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