Remedying and repairing method for flaw of thin-specification flat roll

A repair method and thin-gauge technology, applied in the field of iron and steel metallurgical rolling, to achieve the effect of improving process control, reducing production costs, and ensuring on-time delivery

Active Publication Date: 2016-07-06
PANGANG GRP XICHANG STEEL & VANADIUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(The inner diameter of the flat coil after "core pulling" gas cutting is strictly limited to Φ680~Φ790mm, and the steel coil unit exceeding Φ790mm cannot be produced)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1. Repair method of inner diameter of flat roll

[0031] 1) Measure the inner diameter of the flat roll, and collect the measured data in both horizontal and vertical directions to prepare for subsequent roll diameter processing;

[0032] 2) The defective flat coil is hoisted by the crane to the feeding walking beam of the skin-passing unit, and the flat coil is sent to the ground roller of the steel coil preparation station by the walking beam. By the rotation of the ground roller, the horizontal direction with the large diameter of the flat roll inner ring is turned into a vertical direction (the professional term is about to turn the flat egg into a vertical egg). Then operate the walking beam to return the steel coil to the feeding position;

[0033] 3) Command the crane to hoist a steel coil with a weight of more than 25t in the steel coil warehouse to align with the flat coil and slowly fall, and use external gravity to repair and improve the inner diameter of th...

Embodiment 2

[0042] 1. Repair method of inner diameter of flat roll

[0043] 1) Measure the inner diameter of the flat roll, and collect the measured data in both horizontal and vertical directions to prepare for subsequent roll diameter processing;

[0044] 2) The defective flat coil is hoisted by the crane to the feeding walking beam of the skin-passing unit, and the flat coil is sent to the ground roller of the steel coil preparation station by the walking beam. By the rotation of the ground roller, the horizontal direction with the large diameter of the flat roll inner ring is turned into a vertical direction (the professional term is about to turn the flat egg into a vertical egg). Then operate the walking beam to return the steel coil to the feeding position;

[0045] 3) Command the crane to hoist a steel coil with a weight of more than 25t in the steel coil warehouse to align with the flat coil and slowly fall, and use external gravity to repair and improve the inner diameter of the ...

Embodiment 3

[0054] 1. Repair method of inner diameter of flat roll

[0055] 1) Measure the inner diameter of the flat roll, and collect the measured data in both horizontal and vertical directions to prepare for subsequent roll diameter processing;

[0056] 2) The defective flat coil is hoisted by the crane to the feeding walking beam of the skin-passing unit, and the flat coil is sent to the ground roller of the steel coil preparation station by the walking beam. By the rotation of the ground roller, the horizontal direction with the large diameter of the flat roll inner ring is turned into a vertical direction (the professional term is about to turn the flat egg into a vertical egg). Then operate the walking beam to return the steel coil to the feeding position;

[0057] 3) Command the crane to hoist a steel coil with a weight of more than 25t in the steel coil warehouse to align with the flat coil and slowly fall, and use external gravity to repair and improve the inner diameter of th...

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PUM

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Abstract

The invention belongs to the technical field of ferrous metallurgy rolling, and particularly relates to a remedying and repairing method for a flaw of a thin-specification flat roll. The method specifically comprises the following steps that a, the inner diameter of the flat roll is measured; b, the direction of the flat roll is adjusted; c, the inner diameter of the flat roll is subjected to external force correction; d, the flat roll is manually coiled to a coiling block of an uncoiler, and coiling is finished; and e, production control parameters of the flat roll are input. The remedying and repairing method solves the problems that due to thin-specification steel roll rolling abnormality, in the horizontal stacking and cooling process, the inner diameter of an inner ring of a flat roll formed in the manner that an inner ring of a steel roll collapses is irregular, the flat roll cannot get on a unit to be remedied or sold externally, and consequently the product can only be judged to return to a furnace, and the technology control level of a flat roll splitting unit is improved. The technology control technique is widely applied, delivery of externally entrusted products on schedule is ensured, the production cost is reduced, and the operation current situation that according to a conventional flat roll treatment operation manner, a large amount of labor / a large number of material resources are consumed, time is long, and serious safety hidden danger exists is avoided.

Description

technical field [0001] The invention belongs to the technical field of iron and steel metallurgical rolling, and in particular relates to a rescue and repair method for defects of thin-gauge flat coils. Background technique [0002] In the process of rolling thin gauge (h≤2.0mm) in the hot rolling process, due to reasons such as high coiling temperature and low coiling tension setting, the inner ring of the steel coil collapses to form a flat coil. However, during the stacking and cooling process of normal rolled thin-gauge steel coils, because the horizontal stacking is adopted, the inner ring of the steel coils will also collapse to form flat coils. The flat coil defect means that the inner diameter of the steel coil changes greatly, the length in the horizontal direction increases, and the length in the vertical direction decreases, and the appearance is like a "lying egg". Such defective steel coils can neither be rescued by the unit nor sold outside, and can only be sc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C47/24
CPCB21C47/24
Inventor 朱昌全刘军
Owner PANGANG GRP XICHANG STEEL & VANADIUM CO LTD
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