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

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: 2015-11-04
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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  • Control method for stable coiling of head of hot-rolled high-strength steel

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Experimental program
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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 control method for stable coiling of the head of hot-rolled high-strength steel. The method includes the following steps that head drying is performed on the strip steel in the laminar cooling process; a control system sets steel head tracking distance values; the control system sets the first waiting position of a first assistant coiling roll and the second waiting position of a second assistant coiling roll; the first assistant coiling roll, the second assistant coiling roll and a third assistant coiling roll conduct stepping according to the steel head tracking distance values; and in the pre-expansion process of a central spindle, the control system controls the central spindle to expand to a pre-expansion diameter value ranging from 745 mm to 750 mm from an initial diameter value. By means of the control method, it can be guaranteed that the head of the high-strength steel enters a coiling machine stably and smoothly, the situation that the head is abutted or rubs against relevant equipment, and consequently the steel strip halts is avoided, and therefore the steel heaping accident is avoided.

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 Applications(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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