Method and system for controlling looping of finishing mill

A control method and finishing mill technology, applied in the direction of metal rolling, metal rolling, manufacturing tools, etc., can solve the problems of large impact of strip steel, large impact of looper base, increased maintenance costs, etc., to achieve small impact and prolong service life Life, impact reduction effect

Inactive Publication Date: 2005-06-08
攀枝花新钢钒股份有限公司热轧板厂
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Existing finishing mill looper control such as figure 1 and figure 2 As shown, the switching command is used to switch between the given tension reference and the given voltage reference. The disadvantage is that switching to a contact switch makes it difficult to achieve soft contact and soft landing control. The impact of the base is relatively large, which affects the life of the looper mechanical equipment, shortens the maintenance cycle of the mechanical equipment, and increases the maintenance cost; when the looper is unloaded, because the looper has no soft contact function, the impact on the strip is relatively large , the tension acting on the strip fluctuates greatly, which affects the thickness control accuracy of the finished product

Method used

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  • Method and system for controlling looping of finishing mill
  • Method and system for controlling looping of finishing mill
  • Method and system for controlling looping of finishing mill

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Embodiment Construction

[0013] figure 1 For the control system as a whole, figure 2 for figure 1 part of the control system shown, figure 1 and figure 2 According to the prior art, switching is performed by a switching command between the tension given reference and the voltage given reference. The present invention as image 3 shown, yes figure 2 The control strategy shown is improved, the tension signal is used as the external limiter of the voltage signal, and then the current regulation is performed on the limited signal.

[0014] Such as figure 1 and image 3 , the programmable controller 2 mainly completes the looper lifting and torque control, and the programmable controller 6 mainly completes the speed control of the finishing mill and the closed-loop control of the looper height. The process computer 5 sets the tension of the looper for the programmable controller 2, and sets the working angle of the looper for the programmable controller 6, and the console 1 sends the operator se...

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Abstract

A method and system for controlling the movable sleeve of finishing mill in order to implement the soft contact and decrease the impact to base and band steel features that the tension ring control and voltage loop control are used. The tension signal is used to externally limit the ampletude of voltage signals and the current of limited signal is regulated for controlling the motor of movable sleeve.

Description

technical field [0001] The invention relates to an automatic control technology, in particular to a technology for controlling the looper of a finishing mill. Background technique [0002] The looper of the finishing mill is located between the two finishing mills, and is used to absorb the amount of strip sheathing caused by the dynamic speed drop of the main drive system due to the bite of steel, and maintain the normal amount of lasing between the finishing mills during the rolling process, and maintain the effect on the strip. Micro tension on steel. Existing finishing mill looper control such as figure 1 and figure 2 As shown, the switching command is used to switch between the given tension reference and the given voltage reference. The disadvantage is that switching to a contact switch makes it difficult to achieve soft contact and soft landing control. The impact of the base is relatively large, which affects the life of the looper mechanical equipment, shortens ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B41/00
Inventor 张芮何显贵焦景民石险峰任立新
Owner 攀枝花新钢钒股份有限公司热轧板厂
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