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

Inactive Publication Date: 2015-01-21
WUHAN UNIV OF SCI & TECH
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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 metho

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

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Embodiment Construction

[0089] In order to facilitate those of ordinary skill in the art to understand and implement the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the implementation examples described here are only used to illustrate and explain the present invention, and are not intended to limit this invention.

[0090] please see Figure 7 , is the technical layout diagram of the heavy rail production of the embodiment, and its rolling process is as follows: the billet is heated to the exit temperature in the heating furnace--high-pressure water dephosphorization--BD1 billet rolling--BD2 special-shaped rolling--water Mist cooling - universal rolling rough rolling - water mist cooling - universal rolling finish rolling - cooling bed cooling - straightening.

[0091] The rolling process can quickly calculate the section temperature of the rolled piece under certain pr...

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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.

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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Application Information

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IPC IPC(8): G06F19/00G06F17/50
Inventor 潘成刚马文超何鹏杨虎群肖琴叶传龙周家林赵川翔丁紫正雷志斌徐光刘升
Owner WUHAN UNIV OF SCI & TECH
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