Tension optimizing and compensating method for adjusting rolling force

A tension optimization and rolling force technology, applied in the direction of rolling force/roll gap control, tension/pressure control, etc., can solve the problems of surface quality reduction, out-of-tolerance strip shape, and increased rolling force, and achieve improved The effect of strip rolling product quality, great economic benefit, and improved control accuracy

Active Publication Date: 2015-07-22
BAOSHAN IRON & STEEL CO LTD +1
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  • Abstract
  • Description
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for tension optimization compensation for rolling force adjustment, to solve the abnormal increase of rolling force caused by the increase of iron powder concentration in the emulsion, causing the strip steel shape to be out of tolerance, surface quality reduction, etc. Defective technical issues to improve the utilization rate of the emulsion, reduce production costs, while ensuring rolling stability and product quality

Method used

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  • Tension optimizing and compensating method for adjusting rolling force
  • Tension optimizing and compensating method for adjusting rolling force
  • Tension optimizing and compensating method for adjusting rolling force

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Embodiment 1

[0049] image 3 with Figure 4 Is an embodiment of the tension optimization compensation method for rolling force adjustment of the present invention. image 3 with Figure 4 In the control flow chart shown, the tension optimization compensation method of the present invention includes the following steps:

[0050] S01: Collect all equipment and rolling process parameters in the current rolling process, including the diameter D of the work roll of each stand 1 =513mm, D 2 =486.5mm, D 3 =532mm, D 4 =532.5mm, D 5 =493.3mm; actual reduction rate ε 1 =24.64748%, ε 2 =37.26682%, ε 3 =31.95121%, ε 4 =32.04431%, ε 5 =24.91337%; actual tension:

[0051] T 0 ′=132.57kN,

[0052] T 1 ′=255, 64kN,

[0053] T 2 ′=156.84kN,

[0054] T 3 ′=105.24kN,

[0055] T 4 ′=75.6kN,

[0056] T 5 ′=29.55kN;

[0057] Maximum tension allowed by the unit T max =300kN, and the incoming strip thickness h 0 =2.82mm, width B=955mm, exit thickness h 5 =0.455mm, steel grade is SPHC; see figure 2 .

[0058] S02: Given ch...

Embodiment 2

[0102] S01: Collect all equipment and rolling process parameters in the current rolling process, including the diameter D of the work roll of each stand 1 =514.4mm, D 2 =488.1mm, D 3 =535.2mm, D 4 =525mm, D 5 =509.8mm; actual reduction rate ε 1 =32.74609%, ε 2 =40.12407%, ε 3 =38.78635%, ε 4 =36.42558%, ε 5 =32.1913%; actual tension:

[0103] T 0 ′=74.06001kN,

[0104] T 1 ′=122.8kN,

[0105] T 2 ′=80.2N,

[0106] T 3 ′=49.76kN,

[0107] T 4 ′=37.6kN,

[0108] T 5 ′=12.05kN;

[0109] Maximum tension allowed by the unit T max =300kN, and the incoming strip thickness h 0 =1.82mm, width B=839mm, exit thickness h 5 =0.19mm, steel type is MRT4CA;

[0110] S02: Given characteristic rolling force P * =6569.932kN, safety factor α=1.2;

[0111] S03: Set tension adjustment step value ΔT for each segment s = T s ' / N, in this embodiment, the total number of tension adjustment steps N=20,

[0112] ΔT 1 =T 1 / 20=6.14kN,

[0113] ΔT 2 =T 2 / 20=4.01kN,

[0114] ΔT 3 =T 3 / 20=2.488kN,

[0115] ΔT 4 =T 4 / 20=1...

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Abstract

The invention discloses a tension optimizing and compensating method for adjusting rolling force, and relates to control equipment or a method specially suitable for a metal rolling mill or other processed products, in particular to a tension optimizing and compensating method for adjusting rolling force according to an iron powder concentration of rolling lubrication emulsion. The method comprises the following steps: (A) a today emulsion iron powder monitoring concentration is obtained from a cold continuous rolling set control system; and frictional coefficients corresponding to all frames are calculated according to the today emulsion iron powder monitoring concentration; and (B) the obtained frictional coefficients are calculated according to an actual tension sum of all sections of strip steel to adjust the set tension of each section of the strip steel; slip factors of all the frames are calculated according to the set tensions and the rolling force of all the frames; and the set tensions are optimized and compensated with the smallest slip generation rate as target function. The method realizes the reduction of the generation rate of the increment of production cost and the plate shape defect caused by abnormal rise of the iron powder concentration to the greatest extent through optimizing the set tensions so as to guarantee the stability of rolling process.

Description

Technical field [0001] The invention relates to a control device or method specially suitable for a metal rolling mill or its processed products, and more particularly to a method of tension optimization compensation for adjusting the rolling force according to the iron powder concentration of the rolling lubricating emulsion. Background technique [0002] In the mathematical model system of the cold milk milking process, the rolling force model plays an important role. During the rolling process of cold-rolled strip steel, the friction coefficient is the most important factor affecting the rolling force and directly determines the size of the rolling force. At the same time, the calculation accuracy of the friction coefficient model and the deformation resistance model determines the calculation accuracy of the rolling force model. It can be said that the friction coefficient has a greater impact on the thickness and shape accuracy of the strip cold rolling process. The Chinese...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B37/48B21B37/58
CPCB21B37/48B21B37/58
Inventor 吴首民姚寿军潘铮李秀军白振华潘亮
Owner BAOSHAN IRON & STEEL CO LTD
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