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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: 2011-07-20
BAOSHAN IRON & STEEL CO LTD
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  • Claims
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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
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Effect test

Embodiment 1

[0109] Embodiments 1 to 3 were operated according to the above steps respectively. After the operation of Embodiment 1 according to the initial setting value, the width of the strip head was coiled and narrowed, and the quality of the coil was qualified, so the operator only performed the first-level The tension coefficient is adjusted, and then the control system performs self-adaptation, and the self-adaptation result is stored; after the embodiment 2 is operated according to the initial set value, the width and roll shape quality are all unqualified, so the operator is wrong. Both the first and second tension coefficients have been adjusted, and then the control system has carried out self-adaptation, and the self-adaptation results have been stored; in embodiment 3, only the coil quality is unqualified, so the operator only uses the second The stage tension coefficient is adjusted, and then the control system is self-adapted, and the self-adapted results are stored.

[011...

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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 field of metallurgy, in particular to a control method for strip steel coiling after hot rolling. Background technique [0002] There are two important indicators for evaluating the quality of hot-rolled strip steel: one is the quality of the strip width, and the other is the quality of the strip coil. Generally, the width accuracy of hot-rolled strip steel must be controlled within the accuracy range of 0-20mm. If the strip steel width is lower than the target width, it will be regarded as a substandard product. That is, the strip width is only allowed to have a positive tolerance within 20mm, and no negative tolerance is allowed. The width and quality of hot-rolled strip steel are mainly controlled by the rough rolling and finishing rolling units. It is generally believed that once the strip steel has been rolled by the rough rolling and finishing rolling mills, the size and specificati...

Claims

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Application Information

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Patent Type & Authority Applications(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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