Control method for hot rolled low carbon steel uncoiling cross creases

A control method and horizontal folding technology, which is applied in the field of metallurgy, can solve the problems of low surface quality of hot-rolled low-carbon steel sheets, and achieve the effects of prolonging service life, improving production efficiency and product qualification rate, and improving product quality

Active Publication Date: 2018-06-15
内蒙古包钢稀土钢板材有限责任公司
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Problems solved by technology

[0005] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is that the hot-rolled low-carbon steel has transverse fold defects during the uncoiling process, and the surface quality of the hot-rolled low-carbon steel is low.

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  • Control method for hot rolled low carbon steel uncoiling cross creases
  • Control method for hot rolled low carbon steel uncoiling cross creases

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Embodiment

[0033] A method for controlling cross-folding of hot-rolled low-carbon steel uncoiling, comprising the following steps;

[0034] Step 1. Real-time detection of the diameter of the hot-rolled low-carbon steel coil to be uncoiled;

[0035] Step 2, the diameter of the hot-rolled low-carbon steel coil that measures according to step 1 adopts following formula to calculate the reduction of deep bending roll:

[0036] Deep bending roll reduction = 4250+275-535.2*ln(Diam)-m*(Diam-n)^2

[0037] In the formula, ln represents the logarithm;

[0038] Diam represents the diameter of the current hot-rolled low-carbon steel coil;

[0039] m is 0.00009;

[0040] n is 1300;

[0041] Step 3, pressing down the deep bending roll according to the reduction value of the deep bending roll calculated in step 2, and uncoiling the hot-rolled low carbon steel coil;

[0042] Utilize above-mentioned formula, carry out programming in PLC, realize the real-time detection of the diameter of above-menti...

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Abstract

The invention discloses a control method for hot rolled low carbon steel uncoiling cross creases. The control method for the hot rolled low carbon steel uncoiling cross creases includes the followingsteps that firstly, the diameter of a to-be-uncoiled hot rolled low carbon steel coil is detected; secondly, according to the diameter, measured in the first step, of the hot rolled low carbon steel coil, the downward pressing amount of a deep bending roller is calculated; and thirdly, according to the downward pressing amount value calculated in the second step, the deep bending roller is presseddownwards, and uncoiling production is performed on the hot rolled low carbon steel coil. According to the control method for the hot rolled low carbon steel uncoiling cross creases, the occurring possibility of the cross creases on the surface of strip steel is reduced, and the product quality after uncoiling of the hot rolled low carbon steel is effectively improved; and the production efficiency is improved, the product qualification rate is increased, and good popularization value is achieved.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a control method for uncoiling cross-folding of hot-rolled low-carbon steel. Background technique [0002] Cross fold marks are straight line streaks that run through the surface of the strip and are perpendicular to the rolling direction in the local area of ​​the strip during the uncoiling process of hot-rolled low-carbon steel. There are defects of transverse folds on the surface of hot-rolled low-carbon steel plates, which will affect the deep processing of structural materials and even produce waste products. In order to prevent the hot-rolled low-carbon steel from forming transverse folds on the surface of the strip during uncoiling, a deep bending roll is installed after the uncoiler, and the deep bending roll is pressed down to cause a reverse bending deformation of the strip. When the internal stress of the strip and the When the algebraic sum of the stress produced ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B37/68B21C47/16
CPCB21B37/68B21C47/16
Inventor 刘志嘉邬锡麟张海涛周鑫赵利敬张建军
Owner 内蒙古包钢稀土钢板材有限责任公司
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