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Hot continuous rolling roller thermal expansion determining method and rolling roller gap compensation method

A determination method and thermal expansion technology, applied in the field of rolling roll gap compensation, can solve problems such as thickness tolerance, influence on plate thickness accuracy, rolling instability, etc., to achieve accurate calculation and improve the effect of setting accuracy

Active Publication Date: 2017-08-22
PANGANG GRP PANZHIHUA STEEL & VANADIUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the influence of the thermal expansion of the rolls, during the rolling process, especially after changing the rolls and at the beginning of each stand, there will be obvious thickness out-of-tolerance and rolling instability, which will seriously affect the plate thickness accuracy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0037] The present invention will be further described below in conjunction with embodiment.

[0038] Taking a steel rolling production line as an example, after finishing rolling and changing rolls, the initial temperature of the rolls is 25°C. After rough rolling, they enter the finishing rolling area, and the intermediate billets are sequentially bitten by F1-F6 (generally, the finishing rolling area is equipped with 6 rolls). Or 7 racks), after the F1 pressure is detected, the temperature change of the roll is according to the formula:

[0039] Calculation;

[0040] After the calculation is completed, calculate the thermal expansion of the roll, F2 ~ F6 are the same; when F1 is cast, the temperature change of the roll is according to the formula:

[0041] Calculation;

[0042] After the calculation is completed, the thermal expansion of the roll is calculated. After the thermal expansion value of the roll is calculated, the roll gap compensation is performed on the n...

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PUM

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Abstract

The invention relates to a hot continuous rolling roller thermal expansion determining method and a rolling roller gap compensation method, and belongs to the technical field of steel rolling. The hot continuous rolling roller thermal expansion determining method is simple and practical, roller thermal expansion can be calculated accurately, rolling roller gaps can be effectively compensated for, and set precision of a hot continuous rolling model is improved. Correspondingly, the invention further provides the rolling roller gap compensation method.

Description

technical field [0001] The invention relates to a method for determining thermal expansion of hot continuous rolling rolls and a rolling roll gap compensation method, which belong to the technical field of steel rolling. Background technique [0002] The strip hot rolling process is a process of continuous deformation of the rolled piece, and it is also a process of continuous heat exchange. During the rolling process, the metal rolled piece generates plastic deformation heat in the rolling deformation zone, and the relative sliding between the roll and the rolled piece brings frictional heat. These heats will increase the temperature of the rolls, resulting in corresponding hot rolling thermal expansion. The thermal expansion process of the roll accounts for a relatively large proportion of the entire working time of the roll, which cannot be ignored. Due to the thermal expansion of the rolls, during the rolling process, especially after changing the rolls and at the begi...

Claims

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Application Information

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IPC IPC(8): B21B37/58B21B1/26
CPCB21B1/26B21B37/58
Inventor 雷红刚
Owner PANGANG GRP PANZHIHUA STEEL & VANADIUM