Automatic gain control method and device for mass flow of rolling mill

A technology of automatic gain control and second flow rate, applied in the field of steel rolling, can solve the problems of standard deviation of thickness and low pass rate of thickness deviation of rolled products, and achieve the effect of improving pass rate, improving pass rate of finished products and flexible control.

Active Publication Date: 2016-04-20
武汉钢铁有限公司
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Problems solved by technology

[0003] The embodiment of the present invention solves the technical problem of the low pass rate of thickness standard deviation and thickness deviation of rolled products in the prior art by providing a rolling mill second flow automatic gain control method and device. The control range of the feed-back AGC control signal and the second-flow AGC control signal sent by the second-flow automatic gain control module, the adjusted back-feed AGC control signal and the second flow AGC control signal are input into the hydraulic roll gap control system for integration, through the hydraulic pressure The roll gap control system controls the rolling mill, improving the qualified rate of finished products

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  • Automatic gain control method and device for mass flow of rolling mill

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Embodiment 1

[0051] see figure 1 and figure 2 In this embodiment, the Sendzimir rolling mill is used for rolling, and the correction module introduces a correction coefficient β that decreases with time (the value range of β is 0≤β≤1). After the rolling mill second flow automatic gain control device provided in this embodiment starts to work, the detection unit detects whether the rolling mill is turned on. When the rolling mill is turned on, the first control unit controls the input and the feed-back automatic gain control module starts to work. After the feed-back automatic gain control module sends out Feed the AGC control signal, feed back the AGC control signal through the correction coefficient β (the initial value of β is set to 1 when the rolling mill is turned on), and then input it to the hydraulic roll gap control system, and the hydraulic roll gap control system integrates the corrected AGC control signal Then send a control signal to control the operation of the rolling mill...

Embodiment 2

[0054] see figure 1 and figure 2 In this embodiment, the Sendzimir rolling mill is used for rolling, and the correction module introduces a correction coefficient β that decreases with time (the value range of β is 0≤β≤1). After the rolling mill second flow automatic gain control device provided in this embodiment starts to work, the detection unit detects whether the rolling mill is turned on. When the rolling mill is turned on, the first control unit controls the input and the feed-back automatic gain control module starts to work. After the feed-back automatic gain control module sends out Feed the AGC control signal, feed back the AGC control signal through the correction coefficient β (the initial value of β is set to 1 when the rolling mill is turned on), and then input it to the hydraulic roll gap control system, and the hydraulic roll gap control system integrates the corrected AGC control signal Then send a control signal to control the operation of the rolling mill...

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Abstract

The invention relates to the technical field of steel rolling, in particular to an automatic gain control method and device for mass flow of a rolling mill. The method comprises the following steps: detecting whether the rolling mill is started or not; enabling a feedback automatic gain control module to work when the rolling mill is started; acquiring the speed of the rolling mill and strip steel thickness deviation in real time; and judging whether the speed of the rolling mill is above 30 m / min or not and judging whether the strip steel thickness deviation is below 15 mu or not. A mass flow automatic gain control module and the feedback automatic gain control module are controlled flexibly. The device comprises a detecting unit, a first control unit, an acquiring unit, a judging unit, a second control unit and a correcting unit. By the automatic gain control method and device for the mass flow of the rolling mill, the control precision of a hydraulic roll gap control system is improved, standard deviation of thicknesses of finished rolled silicon steels is controlled within 0.4 mu m, thickness deviation is controlled within 5 mu m, and yield is above 98%.

Description

technical field [0001] The invention relates to the technical field of steel rolling, in particular to a method and device for automatic gain control of second flow in a rolling mill. Background technique [0002] The second flow control system for metal has good control performance. The second flow control system maintains relative independence from the controlled system and the measuring original. The second flow control is based on the theory that whenever the strip flows into the roll gap, the volume is the same. The outflow volume is the same. The volume of the strip is calculated by multiplying the cross-sectional area of ​​the strip by the thickness of the entrance and exit, that is, using the principle that the volume of the metal remains unchanged before and after rolling. The second flow rate AGC (Automatic Gain Control, automatic gain control) control is to use several measurement results of the strip length at the entrance and exit of the rolling mill and the th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B37/00
CPCB21B37/00B21B2037/002
Inventor 孙辉熊金乐黄涛吴胜张剑平刘潋
Owner 武汉钢铁有限公司
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