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Method for controlling width of plate blank by using stokehold width gauge

A technology of width control and furnace application, which is applied in the direction of rolling mill control devices, metal rolling, manufacturing tools, etc., can solve problems such as defects, strip narrowing quality, etc., to improve production efficiency, reduce cost losses, and reduce strip width problem effect

Inactive Publication Date: 2014-11-26
SHANGHAI MEISHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It mainly solves the technical problem that the quality defect of strip steel narrowing is easy to occur during equal width rolling and small width reduction rolling

Method used

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  • Method for controlling width of plate blank by using stokehold width gauge

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Effect test

Embodiment example 1

[0031] Production of width-adjustable slabs (T-shaped blanks): Taking a given slab width of 1250mm as an example, the target width of T-shaped blanks is 1250mm, the width of the large end is 1260mm, and the width of the small end is 1230mm. The actual width of the slab is calculated according to the current general method: The width value of (big head width + small head width) / 2 is 1245mm. According to the measurement results, the size and head deviation of this slab is calculated to be 30mm, and the deviation between the actual average value of the slab width and the target value is -5mm. Both the size and the overall deviation meet the current continuous casting slab width tolerance requirements and belong to the normal slab category. This slab can be arranged to roll the finished product width range of 1200 ~ 1250mm under the permitted production conditions.

[0032] The following take the finished product specifications of rolling 1250mm and 1200mm as examples:

[0033] 1. ...

Embodiment example 2

[0036] Production of ultra-wide slabs: Take the given slab width of 1250mm as an example, the measured slab width is 1280mm as an example, the ultra-wide slab target width is 1250mm, the measured slab width is 1280mm, and the slab width deviation is 30mm, Slabs that exceed the width tolerance requirements of continuous casting slabs (-10 ~ +15mm) are unqualified slabs. If the production cannot be carried out according to the previous principles, it must be returned to the furnace. According to the judging principle of the present invention, even if the actual value of the slab width does not meet the tolerance requirements, the next step of judgment can still be carried out to see if the slab width can meet the requirements for the rolled product strip width. If it is not satisfied, it will be revoked, and if it is satisfied, normal rolling can be carried out. Since the target width of this slab is 1250mm, under the current technology, the width range of the finished product ...

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Abstract

The invention relates to a method for controlling width of a hot roller plate blank, in particular to a method for controlling width of the plate blank by using a stokehold width gauge, and mainly solves a technical problem of quality defect such as narrowly pulled strip which is easily occurred in an aequilate rolling process and a small width reduction amount rolling process. The method comprises the following steps: measuring the width data of the plate blank by the stokehold width gauge, transferring the data to an L2 to store and compute; performing width comparison during a plate blank irradiation verification process, recording abnormal plate blank information if the error is higher than a tolerance range, performing the next plate blank big end and small end judging process no matter the plate blanks are normal or abnormal; performing the step of judging whether the width of the plate blank is ranged in the product width request no matter whether the big end value and the small end value of the plate blank are bigger than the width tolerance range; setting a width model with an actually measured width if the width of the plate blank is in the range of the product width request, and setting the width reduction amount values; configuring different vertical roller load distribution coefficient according to the different width reduction amount, and performing withdrawing treatment when the width of the plate blank is more than the range of the product width request.

Description

technical field [0001] The invention relates to a method for controlling the width of a hot-rolled slab, in particular to a method for controlling the width of a slab by using a width measuring instrument in front of a furnace, especially for controlling the width of a slab when the incoming material of the slab has a large or small head and a certain deviation method. Background technique [0002] The width quality defects and width accuracy of hot-rolled slabs have always been important indicators of the quality of hot-rolled strip products. Whether the incoming slab width is normal or not is the most important factor affecting the width accuracy of the hot-rolled finished strip. The main reason is that the width of the incoming slab is abnormal, which is a defect in the quality of the raw material. Since the raw material for the slab can come from different steelmaking plants and continuous casting machines, there are large differences in the width of the slab from diffe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/16
Inventor 王宁宁卞皓余金鹏夏小明李欣波高映
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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