Start-up method of finishing mill for hot-rolled wide-band steel
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A technology of finishing rolling mill and wide steel, applied in the field of starting of finishing rolling mill
Inactive Publication Date: 2011-12-07
LAIWU IRON & STEEL GRP
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[0004] In order to solve the problems caused by starting under no-load mode in the prior art, the present invention provides a starting method suitable for hot-rolled wide strip finishing mills
Method used
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Embodiment 1
[0023] After the finishing mill for hot-rolling wide strips has all the conditions required for start-up, proceed as follows:
[0024] 1) Click the "light pressure start" dialog box on the zero-adjustment start screen (such as figure 2 shown in ), so that the AGC cylinders of each stand of the finishing rolling mill will automatically perform static pressing, and when the pressure detected by the piezo-magnetic indenter reaches 200T, the AGC cylinders will automatically stop pressing (automatically controlled by the program);
[0025] 2) Click the "F1-6 Automatic Zero Adjustment Request" dialog box on the zero adjustment start screen (such as figure 2 shown in), select zero speed start. Here, "F1-6 Automatic Zero Adjustment Request" is a confirmation of the selection of automatic zero adjustment speed. Click this dialog box once, and the dialog box will change color (for example, turn green), and the automatic zero adjustment speed selection will be input; click again In t...
Embodiment 2
[0028] After the finishing mill for hot-rolling wide strips has all the conditions required for start-up, proceed as follows:
[0029] 1) Click the "light pressure start" button on the zero-adjustment start screen (such as figure 2 shown in ), so that the AGC cylinders of each stand of the finishing rolling mill will automatically perform static pressing, and when the pressure detected by the magnetometer reaches 200T or more, the AGC cylinders will automatically stop pressing;
[0030] 2) In the semi-automatic screen, manually set the speed;
[0031] 3) Control the main drive of the rolling mill at 2m / s 2 The acceleration automatically starts and rises to the manually set speed (F1-F6 zero-adjustment speed: 104, 150, 197, 245, 301, 354, unit: m / min), thus completing the start-up function.
[0032] Therefore, compared with the method according to the prior art of starting the finishing train of hot-rolled wide strips in no-load mode, the advantages of the present invention ...
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Abstract
The invention discloses a start-up method of a finishing rolling unit of hot-rolled wide-band steel. The start-up method of the finishing rolling line for hot-rolled wide-band steel includes the following steps: controlling the hydraulic cylinders of the rolling mills of the finishing rolling line to perform static pressing, so that there is static pressure between the work rolls and the backup rolls of the rolling mills; When the static pressure reaches the set value, the hydraulic cylinders of each rolling mill are controlled to stop pressing, and then start normally. According to the present invention, by increasing the static pressure between the work rolls and the backup rolls before the starting of the finishing rolling unit, the start-up conditions of the rolling mill can be improved, and the disadvantage of insufficient power of the work rolls to the backup rolls can be overcome, thereby effectively avoiding major problems such as roll gnawing. equipment accident.
Description
technical field [0001] The invention belongs to the technical field of metallurgical hot rolling, and relates to a start-up method of a finish rolling unit suitable for hot-rolling wide-band steel. Background technique [0002] The start-up method of the finishing rolling mill for hot-rolling wide-band steel is usually carried out under no-load mode, and the specific process is as follows: the operator presses the start button on the operation panel, and each stand of the finishing rolling mill is started, and the speed is determined by Zero gradually rises to the crawling speed (usually 0.2m / s), and then the operator presses the start button again, and the mill speed rises to the manual setting speed or zero adjustment speed. [0003] Since the start-up is carried out under the condition of no load, only the balance force of the work rolls and the backup rolls are in contact with each other. Therefore, the no-load start-up may be due to insufficient driving force of the wo...
Claims
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