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A control method for stable coiling of hot-rolled high-strength steel head

A control method and head technology, applied in rolling mill control devices, metal rolling, metal rolling, etc., can solve the problems that the head of the strip cannot be completely guaranteed, and achieve the effect of improving the bending performance

Active Publication Date: 2017-06-20
SHOUGANG JINGTANG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present application provides a control method for stable coiling of the head of hot-rolled high-strength steel, which solves or partially solves the problem that the control method for coiling of the head of hot-rolled high-strength steel in the prior art cannot completely ensure the smoothness of the head of the strip. The technical problem of stably entering the coiler has achieved the technical effect of ensuring that the head of the high-strength steel can enter the coiler stably and smoothly, preventing the head from rubbing against related equipment and causing the strip to stop running, and avoiding steel stacking accidents

Method used

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  • A control method for stable coiling of hot-rolled high-strength steel head

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Experimental program
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Effect test

Embodiment 1

[0053] S1: The strip is subjected to a dry-heading process during the laminar flow cooling process, and the part within 1m from the strip head is not sprayed with cooling liquid.

[0054] S2: The control system sets the steel head tracking distance value, that is, the processing unit sets the first set value to be equal to the distance that the strip head passes from the pinch roll to the first winding roll plus 150 mm; the second set value It is equal to the distance that the strip head passes from the first roll-up roll to the second roll-up roll plus 150 mm; the third set value is equal to the distance that the strip head passes from the second roll-up roll to the third roll-up roll Add 150mm to the distance.

[0055] S3: The control system sets the first waiting position of the first winding-assisting roller and the second waiting position of the second winding-assisting roller, that is, the processing unit sets the distance between the first waiting position of the first ...

Embodiment 2

[0059] S1: The strip is subjected to a dry-heading process during the laminar flow cooling process, and the part within 2m from the strip head is not sprayed with cooling liquid.

[0060] S2: The control system sets the steel head tracking distance value, that is, the processing unit sets the first set value equal to the distance that the strip head passes from the pinch roll to the first coil roll plus 220mm; the second set value It is equal to the distance that the strip head passes from the first roll-up roll to the second roll-up roll plus 220mm; the third set value is equal to the distance that the strip head passes from the second roll-up roll to the third roll-up roll Distance plus 220mm.

[0061] S3: The control system sets the first waiting position of the first winding-assisting roller and the second waiting position of the second winding-assisting roller, that is, the processing unit sets the distance between the first waiting position of the first winding-assisting...

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Abstract

The invention relates to a method for controlling the stable coiling of hot-rolled high-strength steel heads, which comprises the following steps: the steel strip is subjected to a dry-heading process in the laminar flow cooling process; the control system sets the steel head tracking distance value; the control system sets the first The first waiting position of the first winding-assisting roller and the second waiting position of the second winding-assisting roller; the first winding-assisting roller, the second winding-assisting roller and the third winding-assisting roller perform stepping actions according to the tracking distance value of the steel head; the mandrel During the pre-expansion process, the control system controls the diameter of the mandrel to expand from the initial value to the pre-expansion value, and the range of the pre-expansion value is 745-750mm. This control method can ensure that the head of the high-strength steel can enter the coiler stably and smoothly, prevent the head from rubbing against related equipment and cause the strip to stop running, and avoid stacking steel accidents.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a method for controlling stable coiling of hot-rolled high-strength steel heads. Background technique [0002] At present, high-strength steel rolling has become an important means for major steel mills to expand their products, receive contract orders, and improve product efficiency. However, due to the high hardness and high strength of high-strength steel itself, it is very difficult for the entire rolling line to roll, especially in the coiling area. Coiling is a difficult problem in high-strength steel rolling at present, mainly reflected in whether the strip head can enter the coiler smoothly and becomes the key to coiling control. The reasons are as follows: the temperature of the high-strength steel head is low and the shape is not good, it is easy to cause scratches between the head of the strip steel and the equipment, so that the tracking position of the strip steel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C47/04B21B37/00
Inventor 刘顺东陈建宇童燕成杨彦广张宝军徐芳孙立明胡娜高文刚张杰陈彤张伟海
Owner SHOUGANG JINGTANG IRON & STEEL CO LTD
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