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

A finite difference and fast calculation technology, applied in the field of rolling, can solve problems such as unpredictable metal flow laws, difficult automation, and long time
CN104298884AInactive Publication Date: 2015-01-21WUHAN UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
WUHAN UNIV OF SCI & TECH
Publication Date
2015-01-21
Estimated Expiration
Not applicable · inactive patent

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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.
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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...

Claims

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