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Analysis of thin strip profile by work roll crossing and shifting in asymmetrical cold rolling April 2015 International Journal of Modern Physics B 29(10n11):1540032
In order to analyze the effects of cold rolling parameters such as the crossing angle and axial shifting value of work rolls on the strip profile, extensive tests were carried out on a 4-high rolling mill equipped with a work roll crossing and shifting system. The results show that the strip profile is nearly flat under asymmetrical rolling.
Aljabri, A., Jiang, Z. Wei, D. (2015). Analysis of thin strip profile by work roll crossing and shifting in asymmetrical cold rolling. International Journal of Modern Physics B, 29 (10-11), 1540032-1-1540032-7.
Mar 01, 2015 In order to analyze the effects of cold rolling parameters such as the crossing angle and axial shifting value of work rolls on the strip profile, extensive tests were carried out on a 4-high rolling mill equipped with a work roll crossing and shifting system. The results show that the strip profile is nearly flat under asymmetrical rolling. The rolling force was also
The influences of rolling process parameters such as the work roll cross angle and work roll shifting on the strip shape and profile of thin strip are recognised throughout this study.
The purpose of work roll crossing is to obtain a larger efficiency of shape and profile control by increasing the roll gap by increasing the distance from the roll center [].By slightly crossing the upper and lower work rolls and reducing the roll force across the roll from the center to the edge of the strip, a bigger crown can also be achieved.
Work roll shifting Work roll crossing (a) (b) Lower work roll Crossing angle = Upper work roll Thin strip Roll center 0 250mm 228 mm 82mm 63mm (0, 4, 8) mm (0.5mm thick) 400 b/2 mm 80, 100mm (0,0.5 1∘) Figure3:Theschematicof(a)workrollshiftingand(b)workrollcrossing. 0.345 0.350 0.355 0.360 0.365 Width of strip (mm) −40 −30 −20 −10 0 ...
Strip profile control in cold rolling of thin strip is a difficult and challenge problem found in industry. Currently using the novel type of strip rolling mill, such as the work roll crossing and shifting is the one of the main methods to control the strip profile quality in cold rolling.
Strip profile control in cold rolling of thin strip is a difficult and challenge problem found in industry. Currently using the novel type of strip rolling mill, such as the work roll crossing and shifting is the one of the main methods to control the strip profile quality in cold rolling. In this paper, 3-D finite element simulation models of the thin strip profile in cold rolling for the ...
Nov 30, 2004 1. Introduction. A cold-rolled thin strip has a wide application, especially in the electronic and instrument industries. In general, thin strip is produced on a tandem cold mill where work rolls are flattened to a non-circular deformed shape .A good strip shape and profile is based on the mathematical models applied to the cold strip rolling process.
Strip profile control during rolling is required to assure the dimensional quality of rolled thin strip is acceptable for customers. Throughout rolling, the strip profile is controlled by using the advanced shape control rolling mill, such as the combination of work roll crossing and shifting during asymmetrical rolling, the one of the valuable methods to control the strip profile quality
Analysis of thin strip profile by work roll crossing and shifting in asymmetrical cold rolling . By Abdulrahman Aljabri, Zhengyi Jiang and Dongbin Wei. Cite . BibTex; Full citation; Publisher: World Scientific Pub Co Pte Lt. Year: 2015. DOI identifier: 10.1142 ...
Strip profile control in cold rolling of thin strip is a difficult and challenge problem found in industry. Currently using the novel type of strip rolling mill, such as the work roll crossing and shifting is the one of the main methods to control the strip profile quality in cold rolling. In this paper, 3-D finite element simulation models of the thin strip profile in cold rolling for the ...
Improving Thin Strip Profile Using Work Roll Cross and Work Roll Shifting Methods in Cold Strip Rolling Figure 3 The schematic of (a) work roll shifting and (b) work roll crossing.
Strip profile control during rolling is required to assure the dimensional quality of rolled thin strip is acceptable for customers. Throughout rolling, the strip profile is controlled by using the advanced shape control rolling mill, such as the combination of work roll crossing and shifting during asymmetrical rolling, the one of the valuable ...
Sep 12, 2008 A commonly used metric to quantify the strip profile is the strip “crown”, denoted C(x).The strip crown is defined as the difference between the thickness, H(0), at the strip center, and the thickness, H(x), at an arbitrary location x, as indicated in the following equation (1) C (x) = H (0) − H (x) Because of end-user requirements to evaluate the difference in strip thickness at
A simplified numerical method is proposed in this article to predict strip profile. The mill is simulated by beams (rolls) on the infinite elastic half space (between rolls and strip). The roll deflection and indentation are calculated using the influence coefficients and Boussinesq’s equations respectively.
[Show full abstract] force and the profile of thin strip in cold rolling when the work roll edges contact. An influence function method is developed to simulate this special rolling process.
and Strip Thickness Profile. This work presents improved technology for attaining high-quality rolled metal strip. ... roll shifting, and roll crossing mechanisms. Validation of the static model is provided by comparing results and solution time with large-scale, commercial finite element ... 5.3 Reliability Analysis of Strip Profile for a 4 ...
Jul 09, 2014 A 3D elastic–plastic finite element method (FEM) model of cold strip rolling for 6-high continuous variable crown (CVC) control rolling mill was developed. This model considers the boundary conditions such as accurate CVC curves, total rolling forces, total bending forces and roll shifting values. The rolling force distributions were obtained by the internal iteration
The influences of rolling process parameters such as the work roll cross angle and work roll shifting on the strip shape and profile of thin strip are recognised throughout this study. The results show that the roll crossing and shifting is efficient way to control the strip shape.
Analysis of thin strip profile by work roll crossing and shifting in asymmetrical cold rolling ... extensive tests were carried out on a 4-high rolling mill equipped with a work roll crossing and ...
CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Analysis of thin strip profile during asymmetrical cold rolling with roll crossing and shifting mill
The influences of rolling process parameters such as the work roll cross angle and work roll shifting on the strip shape and profile of thin strip are recognised throughout this study. The results show that the roll crossing and shifting is efficient way to control the strip shape.
Sep 12, 2008 A commonly used metric to quantify the strip profile is the strip “crown”, denoted C(x).The strip crown is defined as the difference between the thickness, H(0), at the strip center, and the thickness, H(x), at an arbitrary location x, as indicated in the following equation (1) C (x) = H (0) − H (x) Because of end-user requirements to evaluate the difference in strip thickness at the ...
A simplified numerical method is proposed in this article to predict strip profile. The mill is simulated by beams (rolls) on the infinite elastic half space (between rolls and strip). The roll deflection and indentation are calculated using the influence coefficients and Boussinesq’s equations respectively.
The influences of rolling process parameters such as the work roll cross angle and work roll shifting on the strip shape and profile of thin strip are recognised throughout this study. The results show that the roll crossing and shifting is efficient way to control the strip shape.
[Show full abstract] force and the profile of thin strip in cold rolling when the work roll edges contact. An influence function method is developed to simulate this special rolling process.
and Strip Thickness Profile. This work presents improved technology for attaining high-quality rolled metal strip. ... roll shifting, and roll crossing mechanisms. Validation of the static model is provided by comparing results and solution time with large-scale, commercial finite element ... 5.3 Reliability Analysis of Strip Profile for a 4 ...
Dec 29, 2017 The methods used for the asymmetric rolling are single roll drive, different work roll speeds, different work roll diameters or different lubricated work roll surfaces. ... Z., Wie, D. (2014): Analysis of thin strip profile during asymmetrical cold rolling with roll crossing and shifting mill. Advanced Materials Research, 894, pp. 212-216. ...
This work presents improved technology for attaining high-quality rolled metal strip. The new technology is based on an innovative method to model both the static and dynamic characteristics of rolling mill deflection, and it applies equally to both cluster-type and non cluster-type rolling mill configurations. By effectively combining numerical Finite Element Analysis (FEA) with analytical ...
Through the analysis of flattening deformation and deflection deformation on the load, the change rule of the strip profile produced by the work roll with a small roll diameter can be obtained. Combined with theoretical analysis and industrial experiments, it can be found that the improvement effect of the small work roll radius on the profile ...
A flatness disturbance can be produced at a hot strip mill by a mismatch between the work roll profile and the incoming strip thickness profile. This will produce a non-uniform reduction across the width of the strip, leading to a non-uniform elongation of the strip in the direction of rolling (Heaven 1988).
Roll forming, often called open-section forming, uses successive sets of roller dies to bend a strip of steel progressively until the desired shape is achieved. This process is very similar to traditional tube- and pipemaking, but differs in that it can form more complicated sections.
It is a complicated problem for cold-rolled strip to improve asymmetric strip shape in strip production. A roll system and strip coupled model of six-high cold rolling mill was established with finite element method to estimate the effect of intermediate roll shifting, tilting, symmetric and asymmetric bending technologies on strip profile.
Roll wear and fatigue are inevitable phenomena during hot-rolling process. Finite element (FE) analysis shows that roll profiles, especially work roll wear profile, have significant effects on contact stress distributions. Long-term effect of huge contact stress peaks in roll sides is the main factor for roll
Edge-drop control enlarges the shape control theories and technologies. But compared to the profile and flatness control technology, the edge drop control is a developing topic. This paper analyze the influence of strip thickness, strip width, reduction ratio, friction coefficient and deformation resistance on the edge drop based on the elastic deformation of rolls and the three-dimensional ...
flatness controllability from narrow to wide strip. • In connection with axial roll shifting, the SmartCrown® contour can be applied for 4-high and 6-high mill stands. • The patented in-line inspection station allows for quick and easy checks at the top end and bottom surface of the strip.
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