Method for leveling broken wave defects of ultra-thin plates and strips

A gauge plate and broken wave technology, which is applied in the flattening field of ultra-thin gauge plate with broken wave defects, can solve problems that plague enterprises, ultra-thin gauge plate broken waves, and increased cost of rolling thin gauge strips, and achieve improvement Economic benefits, lower production costs, and greater promotional value

Active Publication Date: 2014-02-26
HEBEI IRON AND STEEL
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  • Abstract
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Problems solved by technology

At present, there is no reasonable processing plan for domestic hot-rolled strip defects of ≤1.4mm, and they can only be treated as waste products, which will greatly affect the yield of thin-gauge strips and increase the cost of rol

Method used

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Embodiment Construction

[0012] The leveling method of the ultra-thin gauge plate with broken wave defect of the present invention, it comprises the following steps:

[0013] 1. The crown selection of the working roll of the tempering machine is -0.03mm;

[0014] 2. Process production formula setting: the tension of the coiler is set to 10000-12000KG during the first leveling, the tension of the uncoiler is set to 1800-2000KG, the rolling force is set to 4000-4500KN, and the bending force is set to 150~200KN;

[0015] 3. After wearing the belt and starting the car, first adjust the level value. When there are broken waves on the driving side, press down on the level value on the working side. When there are broken waves on the working side, press down on the level value on the driving side. Adjust the rolling force at the same time as the bending force, and add it to 4000-4500KN. At this time, the broken waves will be eliminated, and then there will be oblique waves in the width direction of the ...

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Abstract

The invention discloses a method for leveling broken wave defects of ultra-thin plates and strips, and belongs to the field of finishing technologies for rolled steel sheets. The method is used for overcoming the broken wave defects of the ultra-thin plates and strips. The technical scheme includes the defined convexity of a work roll of a leveler is -0.03mm; in a primary broken wave leveling and eliminating procedure, tension of a reeling machine ranges from 10000KG to 12000KG, tension of an uncoiling machine ranges from 1800KG to 2000KG, positive roll bending force ranges from 150KN to 200KN, and high rolling force ranges from 4000KN to 4500KN; in a second broken wave leveling and eliminating procedure for oblique waves formed when broken waves are leveled, the tension of the coiling machine, the tension of the uncoiling machine and the roll bending force are unchanged, and small rolling force ranges from 2000KN to 2500KN. The method has the advantages that proper leveling technological parameters are adopted, and the reasonable roll convexity of the work roll of the leveler is selected, so that the broken wave defects of the ultra-thin plates and strips can be eliminated in the leveling procedure, the ultra-thin plates and strips are excellent in shape, the yield can be increased, the production cost can be reduced, and difficult problems which distress enterprises for a long time can be effectively solved.

Description

technical field [0001] The invention relates to a method for leveling ultra-thin specification plates with broken wave defects, and belongs to the technical field of rolled steel sheet finishing. Background technique [0002] Ultra-thin specification strip (≤1.4mm) products are currently hot-selling products in the steel market, with the advantages of stable price and large demand. However, during the process of threading, rolling, and flicking, the ultra-thin specification strip is in an unstable state and swings forward from side to side. One side of the strip scrapes against the side guide plate, forming a wave with a distance of 130mm and a wave height of about 15mm. The wavy shape, viewed from the side, is jagged. This wave shape mostly appears intermittently, the minimum length is only a few meters, and the maximum length can accompany the entire length of the coil. At present, there is no reasonable processing plan for domestic hot-rolled strip defects of ≤1.4mm, an...

Claims

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Application Information

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IPC IPC(8): B21D1/05
Inventor 宋嗣海于勇王兰玉王新东李一栋王春峰李建军马晨王瑞吕耀强董跃星
Owner HEBEI IRON AND STEEL
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