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Thickness controlling method and control system in periodicity thickness changing strip rolling process

A technology of thickness control and strip rolling, which is applied in the direction of control/regulation system, program control in sequence/logic controller, rolling mill control device, etc., and can solve the problems that cannot meet the requirements of thickness control accuracy

Active Publication Date: 2010-01-27
SHENYANG DONGBAO HAIXING METAL MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problem that the existing thickness control method cannot meet the thickness control accuracy requirements in the periodic variable thickness strip rolling process, the present invention provides a periodic variable thickness control method that can realize automatic thickness control under variable thickness conditions and has high control accuracy. Thickness control method and control system in thick strip rolling process

Method used

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  • Thickness controlling method and control system in periodicity thickness changing strip rolling process
  • Thickness controlling method and control system in periodicity thickness changing strip rolling process
  • Thickness controlling method and control system in periodicity thickness changing strip rolling process

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Effect test

Embodiment 1

[0173] The relevant parameters of the system of the present invention are as follows:

[0174] A 650mm four-high reversing rolling mill is adopted, and the distance between the entrance thickness gauge and the exit thickness gauge and the center line of the rolling mill is L d =1000mm, the two thickness gauges are X-ray thickness gauges, the measuring range is 0.1-5.0mm, the static accuracy 2σ=±0.10%, the repeatability is ±0.05%, the long-term stability is ±0.05% / 8h; the hydraulic cylinder The pressure is 22MPa, the response frequency of the hydraulic cylinder is 22Hz, and the step response time of 0.1mm is 31ms; the built-in displacement sensor of the hydraulic cylinder has a range of 100mm and a resolution of 0.001mm.

[0175] Incoming material status: Uniform thickness, steel type is IF, width 500mm, thickness 1.3mm.

[0176] Product size: the thickness of the thick zone is 1.2mm and the length is 300mm; the length of the transition zone is 50mm; the thickness of the thin ...

Embodiment 2

[0181] The relevant parameters of the system of the present invention are as follows:

[0182] A 650mm four-high reversing rolling mill is adopted, and the distance between the entrance thickness gauge and the exit thickness gauge and the center line of the rolling mill is L d =1000mm, the two thickness gauges are X-ray thickness gauges, the measuring range is 0.1-5.0mm, the static accuracy 2σ=±0.10%, the repeatability is ±0.05%, the long-term stability is ±0.05% / 8h; the hydraulic cylinder The pressure is 22MPa, the response frequency of the hydraulic cylinder is 22Hz, and the step response time of 0.1mm is 31ms; the built-in displacement sensor of the hydraulic cylinder has a range of 100mm and a resolution of 0.001mm.

[0183] Incoming material status: Uniform thickness, steel type is ST12, width 450mm, thickness 2mm;

[0184] Product size: thick zone thickness 1.5mm, length 200mm; transition zone length 100mm; thin zone thickness 0.8mm, length 200mm;

[0185] Rolling requ...

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Abstract

The invention discloses a thickness controlling method and a control system in periodicity thickness changing strip rolling process, belonging to the technical field of rolling. The method comprises the following steps: zoning on a rolled piece; determining the roll-gap adjusting amount Sff controlled by feedforward thickness; determining the roll-gap adjusting amount Sfd controlled by feedback thickness; determining the roll-gap adjusting amount Slc controlled by zoning length; determining the final roll-gap setting value; sending the final roll-gap setting value into a thickness controlling system; and adjusting the roll gap of a rolling mill by the thickness controlling system. The system comprises the rolling mill; two sides of the rolling mill are respectively provided with a coiling machine, and a length measuring roller is arranged between the coiling machine and the rolling mill; a thickness measuring instrument is arranged between the length measuring roller and the rolling mill; a rolled diameter measuring instrument is arranged on the coiling machine; the rolling mill is provided with a rolling force sensor and a hydraulic cylinder displacement sensor; a tensiometer is arranged below the length measuring roller; one end of the length measuring roller is provided with a pulse coder; the thickness measuring instrument, the rolled diameter measuring instrument, the rolling force sensor and an equal measuring signal all enter a computer controlling system.

Description

Technical field: [0001] The invention belongs to the technical field of rolling, and in particular relates to a thickness control method and a control system in the rolling process of periodically variable thickness strips. Background technique: [0002] In general, the thickness control in the ordinary plate rolling process often adopts the ordinary AGC (Automatic Gauge Control) control method, and its control goal is to obtain a plate with uniform thickness. A new technology that has emerged recently is to produce periodic variable thickness strips by rolling, and the produced periodic variable thickness strips are cross-cut into differential thickness plates to replace laser tailor welded blanks; used as automotive stamping parts In order to reduce the weight of the vehicle and realize the energy saving and emission reduction of the vehicle. One of the core issues in the periodic variable thickness strip rolling process is: under the condition of periodic rolling, how to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B37/26G05D5/02G05B19/04
Inventor 孙涛刘相华张殿华支颖胡贤磊矫志杰孙杰吴志强李旭
Owner SHENYANG DONGBAO HAIXING METAL MATERIAL TECH
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