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Method for stably rolling tail of hot rolled thin band steel

A thin strip steel and stable technology, applied in the direction of metal rolling, metal rolling, rolling mill control devices, etc., can solve problems such as excessive speed, loss of stability at the tail of the strip, and large AGC adjustment, so as to reduce production costs, Effect of reducing production accidents and improving production efficiency

Active Publication Date: 2012-10-31
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The control method and device disclosed in the above patent documents improve the stability of strip tail rolling, but cannot solve the problems of losing stability of the strip tail during the rolling process due to excessive and fast adjustment of the monitoring AGC.

Method used

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  • Method for stably rolling tail of hot rolled thin band steel
  • Method for stably rolling tail of hot rolled thin band steel
  • Method for stably rolling tail of hot rolled thin band steel

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Embodiment Construction

[0025] The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0026] See figure 1 , the embodiment disclosed is a hot continuous rolling 1580mm seven-stand finishing mill and AGC functional composition diagram, thin strip steel 1 passes through F 1 Rack 2, 1# looper 3, F 2 Rack 4, 2# looper 5, F 3 Rack 6, 3# looper 7, F 4 Rack 8, 4# looper 9, F 5 Rack 10, 5# looper 11, F 6 Rack 12, 6# looper 13, F 7 The frame 14 and the X-ray thickness gauge 15 monitor the AGC to feed back the deviation between the actual plate thickness and the set value detected by the X-ray thickness gauge 15 to correct the roll gap, and control the thickness deviation to zero. The rolling method for the stable tail of the hot continuous rolling thin strip is to control the follow-up frame to monitor the AGC function 18 through the falling edge signal of the upstream frame, so as to avoid excessive and fast adjustment of the monitor...

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Abstract

The invention relates to the technical field of ferrous metallurgy, in particular to a method for stably rolling the tail of hot rolled thin band steel of which the thickness is 1.2 to 3.0 millimeters. The method is characterized by comprising the following steps of: controlling penetration of a monitoring automatic gauge control (AGC) function of a subsequent stander according to a throwing steel falling edge signal of an upstream stander; and taking a throwing steel falling edge signal of the load of the previous stander as a control signal for starting the tail pressing compensation of theband steel AGC of the next stander and adding a tail pressing compensation coefficient ai to the tail pressing compensation value simultaneously and performing pressure relative AGC and AGC oil film compensation so as to comprehensively control the thickness of the band steel. The method has the advantages that: by the rational design of the scheme of the monitoring AGC and AGC tail pressing compensation combination, the thickness of the tail of the band steel is guaranteed, the problem that the tail of the band steel is unstable due to overlarge and overquick regulation of the monitoring AGCcan be avoided, the rolling stability of the tail of the band steel is improved effectively, the production efficiency is improved, the production accident is reduced, so that the production cost is reduced greatly.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgy, in particular to a method for stabilizing the tail of a 1.2-3.0 mm thin strip in the production process of a hot continuous rolling finishing mill. Background technique [0002] With the improvement of scientific and technological level and the increasingly fierce market competition, the requirements for steel have shifted from increasing quantity to high efficiency and high quality and reducing cost. Improving the stability of the rolling process of hot-rolled strip steel is one of the effective ways to improve the quality of strip steel products and reduce production costs. [0003] Automatic thickness control (Automatic Gauge Control, referred to as AGC) is an indispensable and important link in the thickness precision control process of strip steel, which has been widely used in the rolling production of strip steel, including pressure AGC, monitoring AGC, AGC Several contr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/16
Inventor 于斌杨旭张成斌郭宝安张吉富
Owner ANGANG STEEL CO LTD
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