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Surface crack repairing and nondestructive detection method for levelling roller

A non-destructive testing, surface crack technology, applied in the direction of optical testing flaws/defects, material magnetic variables, etc., can solve problems such as stagnation of leveling rolls, waiting rolls, and unqualified product quality, so as to avoid quality substandard and reduce waiting rolls.

Inactive Publication Date: 2021-10-26
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Currently limited to the immaturity of detection methods and repair methods, defects such as small cracks on the surface of the leveling roller are often not detected, resulting in unqualified product quality after being put on the machine
In more serious cases, even if the surface defects of the roll are visible to the naked eye, the repair method and detection method are immature, and the repair cycle is long, resulting in the leveling roll staying on site or even waiting for the roll

Method used

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  • Surface crack repairing and nondestructive detection method for levelling roller

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Embodiment Construction

[0015] The final process of cold-rolled stainless steel strip needs to pass through the tempering machine to level the surface of the stainless steel. If the leveling roll in the tempering machine has some defects, the stainless steel surface after the tempering machine will still be uneven and cannot meet the requirements. .

[0016] In the actual use process, if there are some tiny cracks and other defects on the surface of the leveling roller, it is difficult to detect them, resulting in unqualified product quality.

[0017] This embodiment provides a method for non-destructive detection and repair of cracks on the surface of the leveling roll, specifically as follows

[0018] First, eddy current flaw detection is used to detect whether there is a crack in the middle of the leveling roll surface. The middle part of the leveling roll surface refers to the area composed of points on the effective surface of the leveling roll to the edge of the effective surface with a distanc...

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Abstract

The invention relates to the field of levelling roller detection and repairing, and discloses a surface crack repairing and nondestructive detection method for a levelling roller. The method comprises the following steps of: detecting whether cracks exist in the middle of the surface of the levelling roller or not through eddy current flaw detection, and if so, repairing the cracks in the middle of the surface of the levelling roller through a slotting method; and detecting whether cracks exist on the two sides of the surface of the levelling roller or not through dye penetrant inspection, and if so, repairing the cracks on the two sides of the surface of the levelling roller through a large chamfering method. The method disclosed by the invention can effectively detect and identify defects such as roller surface microcracks for modification, avoids quality inconsistency caused by machine feeding, efficiently and completely realizes levelling roller repairing and detection control, and reduces roller waiting of levelling rollers.

Description

technical field [0001] The invention relates to the field of leveling roll detection and repair. Background technique [0002] As the final process of cold-rolled stainless steel strip, the smoothing process plays a vital role in the surface quality of stainless steel. [0003] Currently limited to the immaturity of detection methods and repair methods, defects such as some tiny cracks on the surface of the smoothing roller are often not detected, resulting in unqualified product quality after being put on the machine. In more serious cases, even if the surface defects of the roll are visible to the naked eye, the repair methods and detection methods are immature, and the repair cycle is long, causing the smooth roll to stay on site or even wait for the roll. Contents of the invention [0004] The technical problem to be solved by the invention is: how to detect defects such as tiny cracks on the surface of the leveling roll and make corrections. [0005] The technical s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P6/04G01N21/91G01N27/90
CPCB23P6/04G01N27/90G01N21/91
Inventor 雷功贾江宏任晋宏段维芳曹国志郑正殷剑飞赵利军张国祥李斌
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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