AGC (Automatic Gain Control) method capable of calculating thickness based on second flow

A control method and second flow technology, applied in the direction of rolling mill control devices, metal rolling, manufacturing tools, etc., can solve the problem of strip breakage in the first stand, loss of tension at the entrance, large fluctuations in the thickness of the strip steel at the exit of the first stand, etc. problems, to achieve the effect of improving control accuracy and reducing production accidents

Inactive Publication Date: 2013-03-06
HEBEI IRON AND STEEL
View PDF6 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the actual production process, due to reasons such as system design and on-site environment, the speedometer of the first rack cannot be put into use normally, resulting in large fluctuations in the thickness of the strip steel at the outlet of ...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • AGC (Automatic Gain Control) method capable of calculating thickness based on second flow
  • AGC (Automatic Gain Control) method capable of calculating thickness based on second flow

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] The present invention will be further described through the embodiments below in conjunction with the accompanying drawings.

[0016] figure 1 It is the control principle diagram of the second flow AGC system that replaces the velocity gauge to calculate the thickness in the embodiment of the present invention. The entrance of the first stand of the continuous rolling mill is equipped with an IRM thickness gauge, and the exit is equipped with a laser velocity gauge. The laser velocity gauge is involved in the measurement of the speed in the normal production process The control of the second flow AGC is shown in path a; when the laser velocimeter cannot be used normally, the method of measuring the speed instead of the laser velocimeter is adopted, and the method of path b is used to ensure the normal closed-loop control of the second flow AGC control.

[0017] figure 2 It is the flow chart of the AGC control method for calculating the thickness in seconds according t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to an AGC (Automatic Gain Control) method capable of calculating thickness based on second flow, and the method is especially suitable for production and control of cold-rolled strip steels and belongs to the technical field of cold-rolled sheet processing of metallurgical industry. The method comprises the following steps of: calculating the thickness of the strip at the outlet of a rolling mill by a control model of second flow AGC; when a tachymeter cannot work regularly, measuring the speed of the strip at the outlet of the rolling mill by calculation instead of using the tachymeter, and participating in the second flow AGC; modifying a speed parameter to ensure the stability of the rolling process; and using the obtained roll gap and speed adjustment quantity in the thickness control of the rolling mill to realize closed-loop control of the second flow AGC. The method has the following beneficial effects: when a first frame outlet tachymeter cannot work regularly, closed-loop control of the second flow AGC is realized by the method when the tachymeter cannot work regularly, the conditions of production accidents caused by failure of the tachymeter in the production process are reduced, the control accuracy of strip steel thickness is improved and the production requirements are satisfied.

Description

technical field [0001] The invention relates to an AGC control method for calculating the thickness based on the second flow rate, which is particularly suitable for the production and control of cold-rolled strip steel, and belongs to the technical field of cold-rolled plate processing in the metallurgical industry. Background technique [0002] In the continuous cold rolling production process, AGC (Automatic Gauge Control) refers to the automatic thickness control method adopted in the rolling process to control the thickness of the exit of the rolling mill within the allowable range of the set target. Mill AGC includes feedforward, feedback, second flow, eccentricity compensation and other controls. AGC feed-forward control is to send the roll gap correction amount to the correction cylinder of the frame according to the change of the entrance strip thickness, and the acceleration correction amount is sent to the speed parameter to improve the effect of roll gap correcti...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B21B37/24
Inventor 周国平谷田于世川杨青刘印忠于绍清王琛郭世忠孙晓光史建伟王迎春
Owner HEBEI IRON AND STEEL
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap