A variable step size monitoring AGC automatic control method for rolling piece thickness control

A technology of thickness control and variable step length, used in rolling mill control devices, metal rolling, metal rolling, etc., can solve problems such as overshoot or insufficient adjustment, and achieve the effect of precise control

Active Publication Date: 2019-10-11
BEIJING SHOUGANG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the AGC step length adjustment coefficient is fixed in the existing technology, and the problem of overshoot or insufficient adjustment is prone to occur in actual production

Method used

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  • A variable step size monitoring AGC automatic control method for rolling piece thickness control
  • A variable step size monitoring AGC automatic control method for rolling piece thickness control
  • A variable step size monitoring AGC automatic control method for rolling piece thickness control

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Embodiment Construction

[0035] In order to enable those skilled in the technical field to which the application belongs to understand the application more clearly, the technical solutions of the application will be described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0036] In the embodiment of the present invention, taking the 2250mm hot rolling production line of a certain iron and steel enterprise as an example, the finishing rolling unit of the hot rolling production line has 6 stands, which are used for hot rolling to produce automobile plates, and its thickness control system adopts the rolling mill of the present invention. For the variable step size monitoring AGC automatic control method of piece thickness control, see figure 1 , the specific control steps are as follows:

[0037] (1) The thickness of the rolled piece is measured by the thickness gauge. After the thickness gauge is loaded for a few seconds, it is judged whether to use absolu...

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Abstract

The invention discloses a variable step size monitoring AGC automatic control method for rolled piece thickness control. Through the method, a thickness adjustment coefficient KM is automatically indexed according to the difference of a measured actual thickness and a target thickness; different temperature adjustment coefficients Kp are adopted according to the variation of a finished rolling actual temperature and a set temperature; the product of the thickness adjustment coefficient KM multiplied by the temperature adjustment coefficient Kp serves as a final adjustment coefficient K; the AGC adjustment step size of the final n racks of a roll train is adjusted according to the final adjustment coefficient K, the thickness of a rolled piece can be controlled accurately, and the qualifiedrate of the thickness within the tolerance range of + / - 30 microns can reach 100%. Over-adjustment and adjustment quantity insufficiency cannot occur.

Description

technical field [0001] The invention belongs to the technical field of steel rolling, and in particular relates to an AGC automatic control method with variable step length monitoring for controlling the thickness of rolled pieces, which is used to improve the thickness control precision of rolled pieces. Background technique [0002] Automatic Thickness Control AGC (Automatic Gauge Control) is one of the important methods to improve the accuracy of strip thickness. Its purpose is to obtain the uniformity of the longitudinal thickness of the plate and strip, so as to produce qualified products. The thickness difference of the plate and strip is determined by the AGC according to the thickness of the head (the head is locked relative to the AGC) or according to the set thickness (absolute AGC) so that the difference between the thickness of each point of the full length and the locked value or the set value is less than the allowable range. The hot-rolled strip thickness cont...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/20
Inventor 孙力娟范建鑫董立杰黄小兵王蕾王淑志任兴华张喜榜
Owner BEIJING SHOUGANG CO LTD
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