Additional given value control method of hot-continuous-rolling thin-specification running sleeve and idle sleeve

A control method and thin-gauge technology, applied in metal rolling, tension/pressure control, etc., can solve the problems of slow adjustment of strip loops and virtual sets, reduce abnormal downtime, ensure product quality, and reduce product quality problems Effect

Active Publication Date: 2015-04-29
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of slow adjustment when the strip steel looper is empty, the invention proposes an additional given control method for hot continuous rolling thin specification looper false

Method used

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  • Additional given value control method of hot-continuous-rolling thin-specification running sleeve and idle sleeve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1: There are five loopers from 0# to 5# in the hot continuous rolling and finishing mill. Take Q235A carbon steel specification 1.48mm*1250mm 5# looper as an example: when the torque deviation ΔM is greater than zero, it indicates that the looper belt In order not to affect the normal looper control of the steel virtual sleeve, the additional setting of the looper servo after the virtual sleeve adopts the torque deviation exponential function curve as follows: figure 1 For adaptive control, additional given value Sadd=α 5 , α=ΔM÷M Tref , the index value is 2, and when the torque deviation value ΔM is 4000, the additional given value is calculated to be 0.64.

[0031] kT is 0.15, T is 18, W is 1250mm, H is 1.48mm,

[0032] Torque deviation ΔM = set torque of strip steel - actual torque of strip steel = 4000;

[0033] The set torque of the strip steel is 12500, when the actual torque of the strip steel is 8500, there is a false cover, then the torque deviation ...

Embodiment 2

[0038] There are five loopers from 0# to 5# in the hot continuous rolling finishing unit. Take the container plate size 1.6mm*1250mm 4# looper as an example: when the torque deviation ΔM is greater than zero, it indicates that the looper strip is false. It does not affect the normal looper control, and the additional setting of the looper servo after virtual looping adopts the torque deviation exponential function curve as follows: figure 1 Carry out adaptive control, the algorithm is as formula 1, the index value is 2, and the corresponding additional given value is obtained according to different torque deviation values, and finally applied to the servo valve of the looper. When the torque deviation value ΔM is 1000, the calculated additional setting is 0.23.

[0039] kT is 0.15, T is 15, W is 1250mm, H is 1.48mm,

[0040] Torque deviation ΔM = set torque of strip steel - actual torque of strip steel = 1000;

[0041] The set torque of the strip steel is 13500, when the act...

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Abstract

The invention relates to an additional given virtual sheathing control method of a hot continuous rolling thin-specification movable sleeve, belonging to the field of hot continuous rolling automatic control. The method is characterized in that when the thickness of strip steel is less than 2.0mm and the strip steel rolling force load value of a rack adjacent to the strip steel is larger than the target value (300-500 tons), the rack is confirmed to bite steel in a tracking way. When the actual torque of the strip steel is less than the set torque of the strip steel, the final value given by a servo valve is calculated by a controller, and a first stage computer control signal channel acts on the servo valve, so that the servo valve acts. After the method is adopted, off tracking and waste rolling which are caused by virtual sheathing of the movable sleeve can be eliminated, and the great hidden danger of damage to mechanical equipment can be avoided, so that the failure time is reduced, the product quality is improved, and good benefit is obtained.

Description

technical field [0001] The invention belongs to the field of looper automatic control of a hot strip rolling line. Background technique [0002] In the hot continuous rolling finishing area, there are rolling mill stands F0~F6 and loopers 0#~5#, and there are corresponding loopers between any two adjacent stands. [0003] Under normal circumstances, the looper control between the racks after the looper is set is torque control, that is, the deviation between the given torque of the looper and the actual torque of the strip is controlled, which can solve the technical control problem of looper adjustment. With the increase of thin-gauge billet and the acceleration of rolling speed, as long as the temperature and shape of the strip between the finishing stands change and the looper proportional servo valve with a slightly slower response speed, it is very easy to show that the looping of the strip is false. The adjustment is slow, so that the strip is easy to deviate and roll...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B37/50
CPCB21B1/26B21B37/50
Inventor 张世厚康炜姚红霞闫峥嵘李秀萍
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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