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Control method of hot-rolling rolled side guide plate for improving hot-rolling roll shape quality

A control method and hot-rolled coil technology, which is applied in the field of hot-rolled side guide plate control, can solve problems such as defects, edge quality, coil shape prone to misalignment, etc., and achieve the effect of reducing production costs and reducing the amount of repairs

Active Publication Date: 2014-07-09
SHANGHAI MEISHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to propose a hot-rolled coil side guide plate control method to improve the hot-rolled coil shape quality, which can effectively solve the problems existing in the coiled incoming strip. , When the camber is curved, the coiling shape is prone to problems of layering, edge out, and edge quality defects

Method used

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  • Control method of hot-rolling rolled side guide plate for improving hot-rolling roll shape quality
  • Control method of hot-rolling rolled side guide plate for improving hot-rolling roll shape quality

Examples

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Embodiment 1

[0030] This embodiment is a method for controlling hot-rolled coiling side guides to improve the quality of hot-rolled coils, rolling a strip with a thickness of 2.2 mm, a width of 1032 mm, and a set pressure of the side guides at 0.6 ton.

[0031] Switching the side guide plate from the pressure control mode to the position control mode depends on the position change value of the side guide plate under the pressure control mode. Only when the change value is greater than △X can the switch be made, and the value of △X is set according to the thickness of the strip. The specific parameters are: when H4.5 mm, △X=5mm; H is the strip thickness.

[0032] After the side guide plate is switched from the pressure control mode to the position control mode, the position of the side guide plate is opened to the maximum depending on the pressure value of the side guide plate in the position control mode. Only when the pressure value is greater than K times the pressure setting value is it ...

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Abstract

The invention relates to a method for controlling a hot-rolled side guide plate in the field of metallurgy, and is a method for controlling a hot-rolled coiling side guide plate to improve the quality of a hot-rolled coil. After the strip steel enters the side guide plate, the side guide plate switches from position control to pressure control; during the pressure control process of the side guide plate, it detects that the position of the side guide plate changes by more than △Xmm, then the side guide plate switches from pressure control to position control, if the position changes If it does not exceed △Xmm, the side guide plate is always under pressure control; after the side guide plate switches from pressure control to position control, detect the pressure feedback value of the side guide plate, if the pressure feedback value exceeds K times the pressure setting value under pressure control mode , the position of the side guide plate is opened once every 5s by 2mm until the pressure feedback value of the side guide plate is less than K times the pressure setting value in the pressure control mode; when the strip leaves the side guide plate, the side guide plate enters position control . The invention effectively solves the problems of misalignment, edge-out, and side-cut quality defects in the shape of the coil when there is swimming and sickle bending in the incoming strip steel.

Description

technical field [0001] The invention relates to a method for controlling a hot-rolled side guide plate in the field of metallurgy, in particular to a method for controlling a hot-rolled coil side guide plate for improving the quality of a hot-rolled coil. Background technique [0002] The quality of hot-rolled coils has always been an important indicator of the quality of hot-rolled strip products. Whether the coiling and incoming materials are normal or not is the most important factor affecting the coil quality of the hot-rolled finished strip. The main reason is that when the coiled material has swimming and sickle bends, it will lead to quality defects in the final roll shape such as staggered layers, edge out, and edge out. [0003] At present, in the coiling process, there are usually only two control methods for the side guide plate. One is the position loop control, that is, the side guide is always in the position loop control mode, the opening of the side guide i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C47/02B21C47/34
Inventor 张奉贤颜满堂于步明朱成功叶富菊
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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