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Finisher vibration vein eliminating method

A technology of skin pass mill and zinc pot, which is applied in the direction of coating, metal material coating process, metal rolling, etc., can solve problems such as rolling mill chattering defects, achieve the reduction of chattering defects, eliminate chattering defects, operation method Simple and practical effect

Active Publication Date: 2018-06-01
GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of rolling mill chatter marks produced by the skin pass machine in the production process of the continuous galvanizing production line in the prior art, the present invention provides a method for eliminating the chatter marks of the skin pass machine

Method used

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  • Finisher vibration vein eliminating method
  • Finisher vibration vein eliminating method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 1. In normal production, when switching from CQ steel grade to DDQ steel grade, the 1.0*1250mm strip steel outlet zinc pot has horizontal roll marks, with a spacing of 50-100mm, and the zinc pot stabilizing roller and correction roller bite should be reduced in time Measure 5mm, adjust the gap between the bushing and the bearing bush online to reduce the gap by 1mm, and reduce the vibration of the stabilizing roller and the correcting roller.

[0017] 2. After adjusting the bite amount of the zinc pot stabilizing roll, the defect has not been significantly alleviated. After adjusting the gap between the bushing and bushing of the stabilizing roller and the correcting roller, the defect has been alleviated, but the horizontal roller mark is still unresolved. The bushing and bushing are seriously worn and shaken in the late stage of roller service. Still obvious.

[0018] 3. After the speed of the production line is reduced from 130 m / min to 110 m / min, the defects of roll...

Embodiment 2

[0023] 1. In normal production, when switching from CQ steel grade to DDQ steel grade, the 1.2*1250mm strip steel outlet zinc pot has horizontal roll marks with a spacing of 50-100mm, and the zinc pot stabilizing roll and correction roll bite should be reduced in time Measure 8mm, adjust the gap between the bushing and the bearing bush online to reduce the gap by 3mm, and reduce the vibration of the stabilizing roller and the correcting roller.

[0024] 2. After adjusting the bite amount of the zinc pot stabilizing roll, the defect has not been significantly alleviated. After adjusting the gap between the bushing and bushing of the stabilizing roller and the correcting roller, the defect has been alleviated, but the horizontal roller mark is still unresolved. The bushing and bushing are seriously worn and shaken in the late stage of roller service. Still obvious.

[0025] 3. After the speed of the production line is reduced from 130 m / min to 110 m / min, the defects of roller pr...

Embodiment 3

[0030] 1. In normal production, when switching from CQ steel grade to DDQ steel grade, the 0.78*1250mm strip steel outlet zinc pot has horizontal roll marks with a spacing of 50-100mm, and the zinc pot stabilizing roller and correction roller bite should be reduced in time Measure 10mm, adjust the gap between the bushing and the bearing bush online to reduce the gap by 1mm, and reduce the vibration of the stabilizing roller and the correcting roller.

[0031] 2. After adjusting the bite amount of the zinc pot stabilizing roll, the defect has not been significantly alleviated. After adjusting the gap between the bushing and bushing of the stabilizing roller and the correcting roller, the defect has been alleviated, but the horizontal roller mark is still unresolved. The bushing and bushing are seriously worn and shaken in the late stage of roller service. Still obvious.

[0032] 3. After the speed of the production line is reduced from 130 m / min to 110 m / min, the defects of rol...

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Abstract

The invention relates to the technical field of continuous galvanized sheet belts, and discloses a finisher vibration vein eliminating method, which comprises the steps of (1) checking whether band steel discharged from a zinc pot is provided with periodically horizontal roll marks or not; and (2) reducing the occlusal amount of a stabilizing roller and a correcting roller by 5 to 10m, and reducing a gap between a shaft sleeve and a bearing bush by 1 to 4mm. The finisher vibration vein eliminating method provided by the invention solves the problem that during a continuous galvanizing production line production process, a rolling mill vibration vein defect is produced on a finisher. According to the finisher vibration vein eliminating method provided by the invention, an operation method is simple and practical, the finisher vibration vein defect problem is effectively handled, and a large number of degradation or the occurrence of a stopping accident since the band steel vibrates in the finisher is greatly reduced.

Description

technical field [0001] The invention specifically relates to the field of production equipment of a hot-dip galvanizing high-speed production unit, and more specifically relates to a method for eliminating vibration lines of a skin pass machine. Background technique [0002] In the process of producing DQ or DDQ in the continuous galvanizing production line, when the temperature of the annealing furnace is above 790°C, the strip steel is relatively soft, and it is easy to produce mill vibration defects in the skin pass mill. Usually, the adjustment is not timely or the method is wrong after the occurrence. Up to hundreds of tons of degradation can be caused by the elimination of defects, which has a great impact on product quality. A large number of degradations will cause the production line to be shut down for processing, and the cause will be found to delay production. Since the annealing furnace cannot be shut down quickly due to the high furnace temperature, the product...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/22C23C2/06C23C2/40
CPCB21B1/22B21B2001/228C23C2/06C23C2/40
Inventor 王海张国堂孙朝勇
Owner GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD
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