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A strip deviation prediction method suitable for continuous annealing units

A technology of strip deviation and continuous withdrawal unit, which is applied in the field of metallurgical steel rolling, which can solve problems such as broken strip accidents, strip edge rubbing, and scraped equipment, and achieve the effects of small workload, avoiding edge rubbing, and improving production efficiency

Inactive Publication Date: 2017-08-11
TANGSHAN DELONG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The present invention aims at the problems that the deviation of the strip steel in the process of continuous withdrawal cannot be predicted and accurately controlled in time in the past, which may easily lead to edge scraping of the strip steel, equipment damage, or even a broken belt accident, etc., and uses the strip deviation mechanism to establish a mathematical model , by calculating the strip tension distribution, formulating quantitative indicators for judging the strip deviation trend, and making a strip deviation prediction method suitable for continuous annealing units

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  • A strip deviation prediction method suitable for continuous annealing units
  • A strip deviation prediction method suitable for continuous annealing units
  • A strip deviation prediction method suitable for continuous annealing units

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Embodiment 1

[0048] according to figure 1 The overall calculation flow chart of the strip deviation prediction method suitable for the continuous annealing unit is shown. The steel strip is selected as CQ, the specification is 0.50mm×1020mm, and the strip is ribbed. The soaking section of the continuous annealing unit of a domestic factory is Take a certain pass as an example. First, in step 1, collect the key equipment and process parameters of the continuous annealing unit, mainly including: the middle diameter D of the adjacent furnace roller s0 =900mm, D x0 =900mm, the distance between the centerlines of adjacent furnace rollers H=21000mm, the radius of furnace rollers R=450mm, the set tension in this process section σ=6.5MPa, the friction coefficient between strip steel and furnace rollers μ=0.25, the influence of friction Coefficient α=0.05, passing plate speed V=5m / s, speed influence coefficient φ=1.09, model coefficient γ=0.65, unit critical deviation factor ψ * = 45;

[0049] S...

Embodiment 2

[0067] Select the strip steel with steel type CQ, specification 0.50mm×1020mm, and unilateral corrugated plate shape. Take a certain pass in the preheating section of the continuous annealing unit in a domestic factory as an example. First, in step 1, collect the key equipment of the continuous annealing unit and process parameters, mainly including: the middle diameter D of adjacent furnace rollers s0 =900mm, D x0 = 900mm, the distance between the centerlines of adjacent furnace rolls H = 27000mm, the radius of furnace rolls R = 450mm, the set tension in this process section σ = 12MPa, the friction coefficient between strip steel and furnace rolls μ = 0.2, the frictional influence coefficient α=0.05, passing plate speed V=6m / s, speed influence coefficient φ=1.09, model coefficient γ=0.65, unit critical deviation factor ψ * = 45;

[0068] Subsequently, in step 2, collect the parameter of strip steel, mainly comprise: strip steel grade CQ, strip width 1020mm, strip thickness ...

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Abstract

The invention discloses a strip steel deviation predicting method suitable for a continuous annealing unit. The method mainly comprises the following steps executed by a computer: (a) collecting the key equipment and technological parameters of the continuous annealing unit; (b) collecting the parameters of a strip steel; (c) defining correlated parameters; (d) assigning an initial valve to each correlated parameter; (e) adjusting a deviation amount; (f) calculating a strip steel tension distribution value under the current deviation amount; (g) calculating the deviation factor of the strip steel under the current state; (h) judging whether the deviation factor exceeds a deviation critical value or not; (i) outputting the deviation amount. The strip steel deviation predicting method suitable for the continuous annealing unit disclosed by the invention has the advantages that online prediction is realized; corresponding control measures can be adopted for a continuous annealing process technology in time according to a prediction result; accidents of side rubbing, strip breakage and the like can be effectively avoided; the production efficiency is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of metallurgical steel rolling, and in particular relates to a strip deviation prediction method suitable for continuous annealing units. Background technique [0002] Continuous annealing adopts technologies such as rapid heating, high temperature annealing, rapid cooling, and overaging treatment, which can combine cleaning, annealing, smoothing, finishing and other processes into one, and has short production cycle, high efficiency, and is suitable for mass production, etc. It has been widely used due to a series of advantages. However, in the continuous annealing production process, the deviation of the strip has always been an important problem affecting the stability of the plate. When the strip steel deviates, the CPC automatic correction roller of the unit will change its position through the oil cylinder according to the strip steel deviation direction and distance until the strip steel is re-center...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00
Inventor 白振华王瑞刘亚星陈双玉侯彬常金梁
Owner TANGSHAN DELONG STEEL CO LTD