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Flying gauge change control method of tandem cold mill

A technology of dynamic size change and control method, applied in rolling mill control device, metal rolling, metal rolling, etc., can solve the problem that dynamic size change control is not ideal and so on

Active Publication Date: 2014-02-05
WISDRI WUHAN AUTOMATION
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  • Abstract
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Problems solved by technology

[0016] The main logical functional units that complete the dynamic gauge change control at the basic automation layer include roll gap control, speed control, and tension control. Logical functional units such as control and online inspection instruments are closely related, so it is not ideal to optimize dynamic variable specification control only by L2

Method used

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  • Flying gauge change control method of tandem cold mill
  • Flying gauge change control method of tandem cold mill
  • Flying gauge change control method of tandem cold mill

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Embodiment Construction

[0097] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0098] figure 1 A schematic diagram of part of the equipment of the five-stand tandem cold rolling mill in the pickling mill combined unit used in this embodiment,

[0099] The steps of the control method for dynamically changing specifications in this embodiment are as follows:

[0100] 1. Firstly, select the transition area where the specification changes dynamically.

[0101] During specification change control, the distance from the strip steel change specification transition zone to each frame is tracked, and the distance is constantly changing when the unit is running.

[0102] Such as f...

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Abstract

The invention discloses a flying gauge change method for a five-rack tandem cold mill. The method comprises the following steps of determining a transition region of flying gauge change; calculating a transition coefficient according to the length of the transition region, the original thickness of band steel before rolling of each rack and the set thickness of the band steel after rolling of each rack; in a transition process, calculating a dynamically adjusted roll gap set value of each rack according to the transition coefficient, and regulating the band steel outlet speed of each rack according to reverse flow. By the adoption of the flying gauge change method, a flying gauge change process of the five-rack tandem cold mill can be optimized, the stability of the flying gauge change is improved, equipment impact is reduced, the out-of-tolerance of the band steel is reduced, the speed of the flying gauge change is increased, and the time of the flying gauge change is shortened.

Description

technical field [0001] The invention relates to metallurgical automation technology, in particular to a dynamic specification-variable control method of a cold tandem rolling mill. Background technique [0002] The fully continuous tandem cold rolling mill can not only roll the same raw material into products with the same or different thicknesses, but also roll different raw materials into products with the same or different thicknesses, which requires that it can be dynamically rolled during the rolling process. The realization of product specification transformation. Because if the specification change cannot be completed while the rolling mill is rolling, but must be realized by shutting down, it cannot be called fully continuous rolling. Therefore, the dynamic specification change is very important for realizing the full continuous rolling method. It is not only the most obvious feature of the full continuous cold rolling mill to distinguish the conventional cold rolli...

Claims

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Application Information

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IPC IPC(8): B21B37/00
Inventor 王利国王胜勇卢家斌
Owner WISDRI WUHAN AUTOMATION
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