Roll configuration structure of tandem acid rolling mill and tandem acid rolling unit
A configuration structure, acid continuous rolling technology, applied in the direction of metal rolling mill stands, rolls, metal rolling stands, etc., can solve the problems of lack of transverse thickness of strip steel, increased scrap rate, low control precision, etc., and achieve reduction in thickness reduction Effects of thinness, improved uniformity, and improved accuracy
Active Publication Date: 2022-03-18
SHOUGANG JINGTANG IRON & STEEL CO LTD
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Problems solved by technology
For the CVC acid tandem mill, the existing technology lacks a method for controlling the transverse thickness of the strip, and can only control the transverse thickness of the strip by first increasing the width of the strip and then trimming twice
And adopting above-mentioned method not only has increased reject rate, and control precision is low
Method used
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[0052] A 2230 acid tandem rolling unit is used to produce steel grade SLZW+Z steel grade. The thickness of the hot-rolled raw material is 3.5mm, the thickness of the acid tandem rolling product is 0.6mm, and the strip width is 1583mm. The roll shape of each roll in the roll configuration structure of the acid tandem mill is as follows:
[0053] For the support roll 11, the curve of its second CVC roll type 111 is:
[0054]
[0055] For the intermediate roll 12, the roll profile curve is:
[0056] First CVC roll type 121 part:
[0057]
[0058] Cylindrical Roll Form Part 122: L m =70mm, depth d m =2mm, the radius R of the transition arc 123 d =1000mm
[0059] For the work roll 13, the roll profile curve is:
[0060] The basic roll type of the work roll 13 is a sinusoidal positive crown roll type 131 of sin70, and the crown value in the radial direction is C w =75um, the length of the roll profile 132 with the target crowning on the edge of the work roll 13 is L n ...
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Abstract
The invention relates to the technical field of continuous cold rolling, in particular to a roll configuration structure of a continuous acid rolling mill and a continuous acid rolling unit. The roll configuration structure of the acid tandem rolling mill includes backup rolls, intermediate rolls and work rolls arranged in sequence. The middle roll is in the first CVC roll shape, and the small head side of the middle roll is formed into a cylindrical roll shape by grinding. The support roll is in the second CVC roll shape, and the roll shape direction of the support roll is opposite to that of the middle roll. The work roll is in positive crown roll shape, and the work roll is ground on the side different from the small head side to form the target crown roll profile, and the roll profile crown value of the target crown roll profile is greater than that of the positive profile roll profile. degree value, the target crown roll length is L n , L n The range of satisfies the following condition: (L‑B) / 2<L n ≤L / 2, L is the length of the roll body, B is the width of the strip. The invention improves the precision of controlling the transverse thickness of strip steel.
Description
technical field [0001] The invention relates to the technical field of continuous cold rolling, in particular to a roll configuration structure of a continuous acid rolling mill and a continuous acid rolling unit. Background technique [0002] The transverse thickness accuracy is one of the important indicators to measure the quality of the strip steel, which directly affects the yield rate of the production line, the quality pass rate and the customer's use cost. For the CVC acid tandem mill, the prior art lacks a method for controlling the transverse thickness of the strip, and the transverse thickness of the strip can only be controlled by first increasing the width of the strip and then trimming twice. And adopting above-mentioned method has not only increased reject rate, and control precision is low. Contents of the invention [0003] In view of the above problems, the present invention is proposed in order to provide a continuous acid rolling mill roll configuratio...
Claims
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IPC IPC(8): B21B13/02
CPCB21B13/02B21B2013/021B21B2267/18
Inventor 任新意高慧敏徐海卫王晓东王松涛郑艳坤张潮秦涛李中伟车鸿奎周鹏飞贾杰韩志刚
Owner SHOUGANG JINGTANG IRON & STEEL CO LTD