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Method for improving strip steel head roll force precision by utilizing temperature function

A technology of rolling force and strip steel, which is applied in the field of rolling force calculation model and temperature drop model, can solve the problems of large rolling calculation deviation, reducing the stability of finishing rolling, and increasing the difficulty of finishing rolling control

Inactive Publication Date: 2013-11-27
XINJIANG BAYI IRON & STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The strip temperature used by the rolling force model to calculate the deformation resistance of the strip is the average temperature of the strip calculated by the temperature drop model, so the rolling calculation deviation is relatively large, so that the adjustment of the AGC control of the finish rolling is relatively large. Frequently, it increases the difficulty of finishing rolling control and reduces the stability of finishing rolling

Method used

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  • Method for improving strip steel head roll force precision by utilizing temperature function
  • Method for improving strip steel head roll force precision by utilizing temperature function
  • Method for improving strip steel head roll force precision by utilizing temperature function

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Embodiment

[0084] Based on the radiation temperature drop model of the strip in the air and the forced convection temperature drop model of the strip in the finishing descaling water, the temperature of the strip head is obtained, and the calculation of the head rolling force of the strip is corrected;

[0085] Among them, the radiation temperature drop model of the steel strip passing in the air is calculated by the following formula:

[0086] Δt = t 1 - k t 1 + 273 1 + Δτ Fεσ G c ( t 1 + 273 ...

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Abstract

The invention discloses a method for improving strip steel head roll force precision by utilizing a temperature function. The temperature drop model calculation is optimized and improved, then a strip steel head temperature drop calculation function is introduced, and the temperature drop values in the processes from rough rolling to finish rolling are respectively calculated by adopting the method of dividing strip steel into a plurality of sections in the length direction so that a relatively accurate strip steel head temperature calculated value can be obtained. Measured data of a strip steel head (an s section) are adopted to study a model, the methods for calculating the temperature drop values when the strip steel is rolled in a straight-in mode and a hot-rolling mode are distinguished, then a relatively accurate strip steel head temperature value is obtained, the calculated deviation of strip steel head roll force is greatly reduced, the precision of the strip steel head thickness size is directly improved, and the stability when the strip steel is processed in a finish rolling and threading mode is indirectly improved.

Description

technical field [0001] The invention relates to a temperature drop model of a rolling force calculation model. By optimizing the temperature drop model, the head temperature of the strip steel obtained by this model is used to correct the head rolling force calculation of the strip steel and increase the thickness of the strip steel head with precision. Background technique [0002] The main content of the strip hot rolling production process can basically be summarized into two categories: size change and temperature change, that is, physical processes with different but interrelated properties. Estimation of temperature change in the hot rolling process is an important prerequisite for realizing the computer control of hot rolling. At present, the temperature model adopted by our factory adopts the average value of the strip temperature when calculating the temperature value from the strip to the finish rolling entrance, and does not consider the fluctuation of the strip ...

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Application Information

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IPC IPC(8): B21B37/58
Inventor 郭勇李斌赵亮李智杰陈强冯渊王涛张智崔新智
Owner XINJIANG BAYI IRON & STEEL