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Method for controlling hot rolling coiling tension

A control method and hot-rolled coil technology, applied in the field of metallurgy, can solve problems such as impracticability, unsatisfactory effect of anti-neck control technology, and failure of pinch rolls to achieve deceleration rate, etc., to achieve the effect of narrowing the width

Active Publication Date: 2012-12-12
BAOSHAN IRON & STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has been proved through tests and analysis that because the pinch rolls of the 2050 coiler cannot achieve the deceleration rate of 1880, the technology similar to that of 1880 hot rolling cannot be implemented
On the other hand, after nearly a year of practical application, it has been proved that the effect of the anti-neck control technology currently used in 1880 hot rolling is not ideal, and it cannot completely eliminate the defect of width narrowing

Method used

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  • Method for controlling hot rolling coiling tension
  • Method for controlling hot rolling coiling tension
  • Method for controlling hot rolling coiling tension

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0109] Embodiments 1 to 3 were respectively operated according to the above steps. After the operation of Embodiment 1 according to the initial setting value, the width of the strip steel head was coiled and narrowed, and the coil quality was qualified, so the operator only checked the first level The tension coefficient has been adjusted, and the control system has been self-adapted, and the self-adaptive result has been stored; after the operation of Example 2 according to the initial set value, the width and roll quality are unqualified, so the operator Both the first and second tension coefficients are adjusted, and the control system is self-adapted, and the self-adaptive results are stored; in Example 3, only the quality of the roll is unqualified, so the operator only adjusts the second one. The tension coefficient of the stage is adjusted, and then the control system is adaptive, and the adaptive result is stored.

[0110] It can be seen that, in the method for control...

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Abstract

The invention discloses a method for controlling hot rolling coiling tension. Strip steel coiling is controlled by a two-level tension control method. The method mainly comprises the following steps of: calculating a first level set value and a second level set value; starting first level tension control according to a calculating result when the head part of strip steel enters a coiling machine;when actually measured coil moment reaches the first level moment set value, delaying some time and starting second level tension control until the strip steel is completely coiled; detecting and determining the width and the coiling quality of the strip steel, and adjusting a tension coefficient if the detected width and coiling quality of the strip steel is unqualified; and performing a self-adapting step. The control method overcomes the defects of the prior art and well solves the problem that the width quality and the coiling quality of the strip steel cannot be qualified at the same time, and the width of the strip steel is ensured as well as the coiling quality of the strip steel.

Description

technical field [0001] The invention relates to a manufacturing control method in the metallurgical field, in particular to a control method for coiling after hot rolling of strip steel. Background technique [0002] There are two important indicators for evaluating the quality of hot-rolled strip: one is the quality of the strip width, and the other is the coil quality of the strip. In general, the width accuracy of hot-rolled strip must be controlled within the accuracy range of 0-20mm. If the width of the strip is lower than the target width, it will be regarded as an unqualified product. That is, the strip width is only allowed to have a positive tolerance within 20mm, and no negative tolerance is allowed. The width quality of the hot-rolled strip is mainly controlled by the roughing and finishing mills. It is generally believed that once the strip is rolled by the roughing and finishing mills, the size of the strip has been basically set. However, in recent years, it ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/54
Inventor 幸利军黄宁海孟文旺李华明张仁其
Owner BAOSHAN IRON & STEEL CO LTD
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