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Method for calibrating sector sections of slab continuous casting machine online

A technology of slab continuous casting and calibration method, which is applied in the field of continuous casting machine roll gap calibration, can solve the problems of long time and low precision, and achieve the effect of improving operation rate, improving control precision and uniform force

Active Publication Date: 2014-11-05
HEBEI IRON AND STEEL
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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 provide a method for calibrating the segment of the slab continuous casting machine. This method can solve the problems of low accuracy and long time of the traditional calibration method, and can improve the control accuracy of the roll gap of the segment and can be calibrated at the same time. All segments have high calibration efficiency, which can improve the operating efficiency of the continuous casting machine and the quality of the slab

Method used

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  • Method for calibrating sector sections of slab continuous casting machine online
  • Method for calibrating sector sections of slab continuous casting machine online
  • Method for calibrating sector sections of slab continuous casting machine online

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Use spacers to level the two pairs of hydraulic cylinders on the inlet and outlet sides of each sector respectively.

[0026] (2) Press down the upper frame of the segment, and the force of the segment is required to be 800 kN.

[0027] (3) The mechanical engineer uses a hand-held roll gap meter to measure the left and right roll gaps of the segment head rolls, and the left and right roll gaps of the end rolls. Table 1 shows the actual measured roll gap value during calibration.

[0028] Table 1 Actual measurement of roll gap during sector calibration

[0029]

[0030] (4) Use the measured roll gap value to assign a value to the displacement sensor in the hydraulic cylinder of the segment, that is, to complete the calibration of the segment.

[0031] Casting number: 201207241512, steel type: Q345R slab specification: 300mm×1800mm, casting speed 0.85m / min. The low magnification rating of this poured slab sample is center segregation C1.5.

Embodiment 2

[0033] (1) Use spacers to level the two pairs of hydraulic cylinders on the inlet and outlet sides of each sector respectively.

[0034] (2) Press down the upper frame of the sector, requiring the force of the sector to be 2400 kN.

[0035] (3) The mechanical engineer uses a hand-held roll gap meter to measure the left and right roll gaps of the segment head rolls, and the left and right roll gaps of the end rolls. Table 2 shows the actual measured roll gap value during calibration.

[0036] Table 2 Actual measurement of roll gap during sector calibration

[0037]

[0038] (4) Use the measured roll gap value to assign a value to the displacement sensor in the hydraulic cylinder of the segment, that is, to complete the calibration of the segment.

[0039] Casting number: 201208241512, steel type: Q345D slab specification: 300mm×1800mm, casting speed 0.85 m / min. The low magnification rating of this cast slab sample is center segregation C0.5.

Embodiment 3

[0041] (1) Use spacers to level the two pairs of hydraulic cylinders on the inlet and outlet sides of each sector respectively. This work should be done before the calibration of the sector, and appropriate adjustments should be made as needed during the calibration.

[0042] (2) Press down the upper frame of the sector, requiring the force of the sector to be 4000 kN.

[0043] (3) The mechanical engineer uses a hand-held roll gap meter to measure the left and right roll gaps of the segment head rolls, and the left and right roll gaps of the end rolls. Table 3 shows the actual measured roll gap value during calibration.

[0044] Table 3 Actual measurement of roll gap during sector calibration

[0045]

[0046] (4) Use the measured roll gap value to assign a value to the displacement sensor in the hydraulic cylinder of the segment, that is, to complete the calibration of the segment.

[0047] Casting number: 201208301515, steel type: Q345D slab specification: 300mm×2400mm...

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Abstract

The invention provides a method for calibrating sector sections of a slab continuous casting machine online, and belongs to the technical field of roll gap calibration methods of continuous casting machines. The method is used for calibrating the sector sections of the slab continuous casting machine online. According to the technical scheme, the method includes the steps that (1) two pairs of hydraulic cylinders at an inlet and an outlet of each sector section are leveled through gaskets respectively; (2) upper frames of the sector sections are pressed through pressure ranging from 800 kN to 4000 kN; (3) roll gap values of the inlets and the outlets of the sector sections are measured respectively; (4) displacement sensors in the hydraulic cylinders are calibrated according to the actually-measured roll gap values. By means of the method for calibrating the sector sections of the slab continuous casting machine online, the control precision of roll gaps of the continuous casting machine can be increased and reach 0.20 mm. The method can be used for calibrating all the sector sections at the same time, the calibrating efficiency is high, and the operating efficiency of the continuous casting machine can be improved. The hydraulic cylinders of the sector sections, calibrated through the method, of the continuous casting machine bear force uniformly, and the interior quality of casting blanks and the production stability of the continuous casting machine are improved. By means of the method, the labor intensity of workers can be greatly reduced.

Description

technical field [0001] The invention relates to the calibration and use of continuous casting machine roll gaps, in particular to an online calibration method for segments of slab continuous casting machines, and belongs to the technical field of continuous casting machine roll gap calibration methods. Background technique [0002] The main equipment of the slab continuous casting machine is the crystallizer system and the sector system, and the precision control level of the continuous casting machine equipment determines the quality of the continuous casting slab. In recent years, high-quality plates have higher and higher requirements on the internal quality of continuous casting slabs, and to obtain high-quality continuous casting slabs, the roll gap control accuracy of the continuous casting machine segment is a key factor. In order to improve the roll gap control accuracy of the fan section, it is necessary to calibrate the roll gap of the continuous casting machine be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/16B22D11/06
Inventor 胡志刚李杰郑京辉赵英利
Owner HEBEI IRON AND STEEL
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