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Method of using rough rolling inverse-pass vertical roll gap measurement for conducting plate blank width control

A technology of width control and vertical roll rolling, applied in the direction of metal rolling stand, metal rolling mill stand, etc., can solve the problems of no patents and literatures, etc.

Active Publication Date: 2014-12-17
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] There are no relevant patents and documents in the prior art

Method used

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  • Method of using rough rolling inverse-pass vertical roll gap measurement for conducting plate blank width control
  • Method of using rough rolling inverse-pass vertical roll gap measurement for conducting plate blank width control
  • Method of using rough rolling inverse-pass vertical roll gap measurement for conducting plate blank width control

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0137] Taking Baosteel Meishan 1780 hot rolling production line as an example, the production line has two horizontal rolling mills and vertical rolling mills for rough rolling, and the production line has a width gauge at the exit of R2 stand. When rolling in a conventional rolling mill, the basic settings are as follows:

[0138] (1) Rough rolling strategy

[0139] Strip steel number: PIECE_ID="74610700500" Steel type: STEEL_GRADE="IU5853A1"

[0140] Rough rolling width grade: RMClassW=5 Rough rolling thickness grade: RMClassH=2

[0141] Rough rolling width reduction level: RMClassWRedu=2 Rough rolling width target: RMAimW=1305

[0142] Incoming material thickness: PDI_ENT_THK: 230.00mm,

[0143] Incoming material width: PDI_ENT_WID: 1310.00mm,

[0144] Finish rolling target thickness: PDI_TAG_THK: 2.70mm,

[0145] Roll target width: PDI_TAG_WID: 1305.00mm,

[0146] Step 2: Rough rolling pre-calculation

[0147] Calculation of conventional roughing settings

[0148] ...

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Abstract

The invention provides a method of using rough rolling inverse-pass vertical roll gap measurement for conducting plate blank width control. A conventional rough rolling vertical roll inverse-pass rolling process is conducted in a dummied mode, and width control is not conducted on strip steel. According to the method, in the rough rolling inverse-pass rolling process, rolling is conducted on vertical rolls in a small rolling force control mode, roll gap measurement is conducted, and therefore plate blank width can be obtained through roll gap model calculation; the plate blank width is used for rough rolling width resetting and broadsiding model learning. The method can solve the problem that accurate width measurement data can not be obtained in pony-roughing pass rough rolling process in the prior art, accurately provide plant blank inlet width used for resetting calculation in the rough rolling process, and improve the final rough rolling precision.

Description

technical field [0001] The present invention relates to the technical field of steel rolling control. Specifically, the present invention relates to the use of the small rolling force control of the vertical rollers in the reverse pass of rough rolling, and the measurement of the width of the slab through the roll gap of the vertical rollers, so as to more reasonably carry out the middle pass of rough rolling. Slab width control and model learning ensure the accuracy of slab width control. Background technique [0002] Due to factors such as investment and measurement environment, generally hot rolling production lines are equipped with width measuring instruments only at the rough rolling exit during the rough rolling stage. However, the slab width control in rough rolling is often multiple passes, and the slab width in the middle pass can only be estimated by the model. This method restricts the further improvement of the width control precision of the rough-rolled slab. ...

Claims

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Application Information

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IPC IPC(8): B21B37/22
Inventor 张健民夏小明李维刚
Owner BAOSHAN IRON & STEEL CO LTD
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