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A Compensation Method for Roll Diameter and End Defects of Six-high Rolling Mill

A compensation method and technology of size and head, applied in the field of strip steel cold rolling, can solve the problems of large fluctuations in product quality and inability to achieve quantitative control, and achieve the effect of improving the quality of the plate shape

Active Publication Date: 2017-08-11
唐山市榕泽钢材加工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past, the on-site treatment of plate shape defects caused by large and small heads almost completely relied on the experience of on-site operators, mainly based on qualitative control, and conscious quantitative control could not be achieved, resulting in large fluctuations in product quality

Method used

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  • A Compensation Method for Roll Diameter and End Defects of Six-high Rolling Mill
  • A Compensation Method for Roll Diameter and End Defects of Six-high Rolling Mill
  • A Compensation Method for Roll Diameter and End Defects of Six-high Rolling Mill

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Such as figure 1 As shown, a method for compensating defects of roll diameter and head in a six-high rolling mill. First, in step 1, the parameters of the basic equipment are collected, mainly including the diameters D of the working rolls, intermediate rolls, and backup rolls w =160mm, D m =210mm, D b =630mm, length L of work roll, intermediate roll and backup roll w =780mm,L m =750mm, L b =750mm, the target roll shape distribution value D of the lower work roll 4yi ={159.9873,159.9911,159.9945,159.9975,160.0001,160.0023,160.0041,160.0055,160.0065,160.0071,160.0073,160.0071,160.0065,160.0055,160.0041,160.0023,160.0001,159.9975,159.9945,159.9911,159.9873}

[0032] Diameter difference ΔD between the head of the working side of the lower work roll and the head of the driving side z4max = 100um, the diameter difference between the working side and the drive side head of other rolls is zero, the maximum rolling roll amount η allowed by the rolling mill max =150μm, th...

example 2

[0049] First, in step 1, the parameters of the basic equipment are collected, mainly including the diameter D of the work roll, intermediate roll, and backup roll w =160mm, D m =210mm, D b =630mm, length L of work roll, intermediate roll and backup roll w =780mm,L m =750mm, L b =750mm, target roll shape distribution value D of upper and lower work rolls 3yi =D 4yi ={159.9873,159.9911,159.9945,159.9975,160.0001,160.0023,160.0041,160.0055,160.0065,160.0071,160.0073,160.0071,160.0065,160.0055,160.0041,160.0023,160.0001,159.9975,159.9945,159.9911,159.9873}

[0050] Diameter difference ΔD between the head of the working side and the head of the driving side of the upper work roll z3max =50um, the diameter difference ΔD between the working side and the drive side head of the lower work roll z4max = 100um, the diameter difference between the working side and the drive side head of other rolls is zero, the maximum rolling roll amount η allowed by the rolling mill max =150μm, t...

Embodiment 3

[0067] First, in step 1, the parameters of the basic equipment are collected, mainly including the diameter D of the work roll, intermediate roll, and backup roll w =160mm, D m =210mm, D b =630mm, length L of work roll, intermediate roll and backup roll w =780mm,L m =750mm,L b =750mm, the target roll shape distribution value of the upper work roll

[0068] D. 3yi ={159.9873,159.9911,159.9945,159.9975,160.0001,160.0023,160.0041,160.0055,160.0065,160.0071,160.0073,160.0071,160.0065,160.0055,160.0041,160.0023,160.0001,159.9975,159.9945,159.9911,159.9873}

[0069] Target profile distribution value of upper intermediate roll

[0070] D. 2yi ={209.9887,209.9922,209.9887,209.9923,209.9887,209.9924,209.9887,209.9925,209.9887,209.9926,209.9887,209.9927,209.9887,209.9928,209.9887,209.9928,209.9887209.9929,209.9887,209.9930,209.9887}

[0071] Target profile distribution value for upper back-up roll

[0072] D. 1yi ={629.9887,629.9922,629.9887,629.9923,629.9887,629.9924,629.9887...

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Abstract

A method for compensating roll diameter and head defects of a six-high rolling mill, which includes the following steps executed by a computer: 1. Collection of basic equipment parameters; 2. Collection of basic rolling process parameters for products with typical specifications; 3. Definition of optimal tilting rolls 4. Calculate the bending force of the work roll, the bending force of the intermediate roll, the amount of shifting and tilting of the intermediate roll; 5. Calculate the objective function; 6. Obtain the optimal amount of tilting and end the calculation. The invention can realize the quantitative compensation for the defects of roll diameter and size, minimize or even eliminate the influence of the size and size defects on the shape of the plate, and solve the problem that the on-site treatment of the plate shape defects caused by the size of the roll diameter is almost completely dependent on the site Operator problems, improving the quality of the finished strip in a fixed position of the rolling mill during a specific roll cycle.

Description

technical field [0001] The invention relates to the technical field of strip steel cold rolling, in particular to a method for compensating roll size and head defects suitable for a six-high rolling mill. Background technique [0002] The so-called roll size head refers to the fact that the roll has a certain taper after grinding due to the precision of the grinder and the technical problems of the operator. After the roll size ends, the exit of the rolling mill will produce a shape defect that is closely related to the roll change cycle. The position of the shape defect is basically unchanged during a roll life cycle, and its position and degree will also change after the roll is replaced. Sometimes it gets worse and sometimes it goes away. At the same time, as strip users gradually shift from low-end to high-end, users have higher and higher requirements for the shape and quality of products. In this way, the plate shape defect caused by the size of the roll has become t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50B21B37/28
Inventor 白振华刘亚星侯彬杜江城骆国玲宋和川
Owner 唐山市榕泽钢材加工有限公司
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