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A Method of Controlling Waves in the Strip Threading of Finishing Mill Stands

A technology of intermediate wave and finishing mill, applied in the field of steel rolling, can solve the problems of intermediate wave and proportional crown mismatch, and achieve the effect of reducing production cost, optimizing use method and increasing profit

Active Publication Date: 2016-01-13
首钢股份公司迁安钢铁公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method for controlling the middle wave of the strip threading of the finishing rolling stand, which solves the problem of the middle wave during the strip threading between the strip steel stands caused by the mismatch of the proportional convexity of each stand in the prior art. technical problem

Method used

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  • A Method of Controlling Waves in the Strip Threading of Finishing Mill Stands
  • A Method of Controlling Waves in the Strip Threading of Finishing Mill Stands
  • A Method of Controlling Waves in the Strip Threading of Finishing Mill Stands

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Embodiment 1

[0024] Step 201: In the embodiment of the present invention, the actual roll wear amount of the F1-F7 stands are respectively measured by a roll grinder, and the actual wear amount in the F1-F7 stands are obtained respectively;

[0025] Wherein, in the embodiment of the present invention, the measuring method of the grinding machine is:

[0026] The wear data of the roll is the diameter of the upper machine minus the diameter of the lower machine before grinding, and the result obtained is the wear amount of the midpoint diameter of the roll in the rolling mill. The grinding machine measuring system adopts the outer card type grating ruler to measure the diameter data, and the measurement accuracy is ±0.002mm. The calibration of the measurement system is performed using the reference diameter disc that comes with the grinder, and the calibration of the measurement system is performed once a day.

[0027] For example, the actual wear amount of each frame measured by the grindi...

experiment example 1

[0053] Experimental Example 1: Roll Wear Accuracy Verification

[0054] In the first half of 2013, combined with the actual situation of a factory, after counting the four planned orders, the actual wear amount of the F1, F2, F3 and F4 frames was obtained through the roll grinder, and then the theoretical calculation was obtained by the secondary shape calculation method. The wear amount is compared, and the wear coefficient of the frame is adjusted, as shown in Table 4, Table 5 and Table 6 respectively:

[0055] Table 4: Wear factor adjustment table for F1 frames

[0056]

[0057] Table 5. Adjustment wear coefficient table of F2 frame

[0058]

[0059] Table 6F4 Rack Adjustment Wear Coefficient Table

[0060]

[0061] In addition, for some high-grade non-oriented silicon steels such as S18 and S12 with silicon content above 2.5, (1.55mm*1175mm specification) is prone to the problem of intermediate waves in the F4 frame and the F6 frame, but through the above veri...

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Abstract

The invention discloses a method for controlling middle waves in the strip penetrating process of finishing mill frames, and belongs to the technical field of steel rolling. The method for controlling middle waves in the strip penetrating process of the finishing mill frames comprises the steps that the actual roll abrasion loss of the machine frames from F1 to F7 is respectively measured through a roll grinder, and the actual abrasion loss of any machine frame in the machine frames from F1 to F7 is obtained; according to the roll abrasion rate, the rolling force in unit width, the number of revolution times of a roll, the surface hardness factor of the roll and the actual abrasion loss, the theoretical abrasion loss of any machine frame in the machine frames from F1 to F7 is respectively obtained through a secondary flatness calculation method; when the theoretical abrasion loss of any machine frame in the machine frames from F1 to F7 is larger than the actual abrasion loss, the abrasion coefficient of the corresponding machine frame is adjusted. The method for controlling middle waves in the strip penetrating process of the finishing mill frames relieves the phenomenon that middle waves are generated when thin strip steel penetrates through the finishing mill frames, improves the strip penetrating stability of products, and finally achieves the purposes of improving productivity and yield, lowering production cost and increasing returns.

Description

technical field [0001] The invention belongs to the technical field of steel rolling, and in particular relates to a method for controlling intermediate waves in strip passing through a finishing rolling stand. Background technique [0002] Qiangang's 1580mm rolling line is mainly based on thin-gauge strip steel and silicon steel. However, in the setting calculation of the above-mentioned products, the general general model always has a strip machine caused by the mismatch of the proportions of each rack. The problem of intermediate waves when passing the belt between racks has a similar problem with Qiangang's secondary model. The middle wave is a problem that is absolutely forbidden for thin-sized products, otherwise the strip is prone to be in an unstable swimming state due to the middle wave, and then rubs against the side guide plate, the strip appears folded, and the intermediate rolling of the strip leaks scrap, etc. , and even if the strip is successfully worn at th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/28
Inventor 王秋娜李彬李金保张新新安冬洋王淑志
Owner 首钢股份公司迁安钢铁公司