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Cold bend roller welding repairing method

A welding repair and roll technology, applied in welding equipment, arc welding equipment, manufacturing tools, etc., can solve the problems of high cost ratio, roll breakage, roll scrapping, etc.

Inactive Publication Date: 2014-03-05
湖州市银鑫轧辊有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] During the use of cold-bending or welded pipe rolls, due to large changes in local strength, the rolls will be damaged, such as wear, collapse, cracks on the surface of the roll, breakage of the roll, uneven hardness of the roll, etc., resulting in the scrapping of the roll
Patent 200810306385.9 discloses a method for repairing surface defects of hot-rolled backup rolls, which only repairs surface defects of hot-rolled backup rolls, and does not involve cold-bending rolls
201010262304. 7 discloses the structure and repair method of the roll, which utilizes the outer side of the roll cover to re-wrap a layer of new roll cover method, the cost is relatively high and cannot reach the original level

Method used

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Embodiment Construction

[0010] In the cold-bending roll welding repair method of the present invention, the components of the cold-bending roll are calculated by weight percentage: C: 0.85%-1.10%; Si: 0.6%-1.0%; Mn: 0.20%-0.8%; Cr: 5.5 %-7.5%; Mo:0.30%-0.8%; V:0.1%-0.3%; Ni≤0.4%; P≤0.020%; S≤0.015%; the rest is Fe and unavoidable impurities; the repair of the roll Follow the steps below: 1) Conduct crack depth and length flaw detection on the cracked and damaged parts, and grind and clean the cracked and damaged parts on the surface of the roll; 2) Preheat and preheat the roll; 3) Use surfacing welding process for repair Welding; 4) Post-weld heat treatment; 5) Mechanical processing according to the drawings; 6) Non-destructive testing and hardness testing.

[0011] In the above step 1), the surface of the roll needs to be wiped clean to remove oil and impurities. When the surface layer of the roll is damaged, use an electric grinding wheel to smooth the shedding area until it reaches the base m...

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Abstract

The invention relates to a cold bend roller welding repairing method. The cold bend roller welding repairing method comprises the steps of (1) detecting the depth and length of a fracture in the fracture and damaged portion, and carrying out grinding and back gouging on the fracture and damaged portion on the surface of a roller, (2) carrying out heating pre-heating processing on the roller, (3) carrying out welding repairing through a surfacing process, (4) carrying out heating processing after welding, (5) carrying out machining according to drawing requirements, and (6) carrying out damage-free detection and hardness detection. The cold bend roller welding repairing method repairs the damaged roller through a series of industrial measures and procedures, tracking statistics shows that the service life of the repaired roller is the same as that a newly made roller, the surface hardness reaches HRC56-60, the expenses on the aspect of roller usage is largely reduced for use enterprises, and therefore the purposes of reducing cost and increasing benefits are achieved.

Description

technical field [0001] The invention relates to a welding repair method for cold-bending rolls. Background technique [0002] During the use of cold-bending or welded pipe rolls, due to large changes in local strength, the rolls will be damaged, such as wear, collapse, cracks on the roll surface, roll breakage, and uneven hardness of the rolls, which will cause the rolls to be scrapped. Patent 200810306385.9 discloses a method for repairing surface defects of hot-rolled backup rolls, which only repairs surface defects of hot-rolled backup rolls and does not involve cold-bending rolls. 201010262304. 7 discloses the structure of roll and repair method, what utilize is that the outside of roll cover wraps one deck new roll cover method again, and cost is higher, can not reach original level. Contents of the invention [0003] Aiming at the problems existing in the prior art, the object of the present invention is to provide a technical proposal of a welding repair method for...

Claims

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Application Information

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IPC IPC(8): B23K9/04B23P6/00
CPCB23P6/00B23K9/013B23K9/046
Inventor 黄金荣范银芳
Owner 湖州市银鑫轧辊有限公司
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