analysis of thin strip profile by work roll crossing and shifting in

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 ...

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 …

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.

Analysis of thin strip profile by work roll crossing and shifting in asymmetrical cold rolling Article (PDF Available) in International Journal of Modern Physics B 29(10n11):1540032 · April 2015 ...

• A roll that has a diameter at the ends slightly larger than in the center. The surface speed is greater at the ends than the center. The surface speed difference causes an ingoing web tension distribution that is shaped similar to the speed profile. • Too Much Crown- Roll becomes a Web Buncher-upper! • Most Effective on Extensible Materials

Work roll shifting is used to change the effective roll crown. This function changes the roll crown flexibly in accordance with profile and flatness control. The high-speed strip shear in front of the down coilers is a rotary drum type shear and can cut the strip while running at high speed.

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 ...

Controlling cold strip profile is a difficult and significant problem has been found in industry during thin strip rolling. At present choosing the new type of strip rolling mill is the one of main methods to control the strip shape quality in cold rolling. The influences of rolling process parameters such as the work roll cross angle and work roll shifting on the strip shape and profile of ...

Strip profile during rolling: Evolution of the strip profile is influenced by two very important parameters: 1) The temperature inside mill housing. Rolling generates heat. The oil flow removes the heat, and a balanced rolling conditions, particularly on the speed and the reduction size. The work rolls heat up quickly — faster than the

Roll stand for producing plane roll strips having a desired strip profile superelevation US20040040358A1 (en) * : : Jurgen Seidel: Roll stand for producing plane roll strips having a desired strip profile superelevation EP1228818A3 (en) * …

Research and Application on Shifting Strategy of Conventional Work Roll in Hot Strip Mills; ... Simulation of Shape and Cross Section Profile of Cold Rolling Strip; Analysis of Microstructure Influence on Edge Crack Evolution of Thin Strip during Cold Rolling; Longitudinal Buckling of Thin Strip in Cold 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 in ...

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 ...

[1-3], as well as work rolls crossing and shifting (RCS) [4] mills have been introduced and developed to improve the strip shape and profile. The PC mill was first used commercially at Nippon Steel's Kimitsu Works in 1991 [1], and it has been commonly used in hot rolling mills for plating and stripping as a …

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.

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.

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.

choosing dΑ to be a thin strip parallel to one of the coordinate axes.one of the coordinate axes. • For a rectangular area, 2 2 3 h 3 1 0 I x =∫y dA =∫y bdy = bh • The formula for rectangular areas may also be applied to strips parallel to the axes, dI x y dx dI y x dA x ydx 3 2 2 3 =1 = = 16-13 From: Rabiei. Homework Problem 16.1 ...

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 in ...

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.

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 ...

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 ...

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 ...

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 analyzed in detail by ...

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 ...

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 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 …

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.

Jul 01, 2006· However, in practical thin strip rolling, the upper and lower work rolls may have a local residual deformation beyond the edges of the strip if the strip is very thin and there is no work roll bending system applied as shown in Fig. 2. L e is the roll edge contact length, L w the roll barrel length, B the strip width, p (x) the rolling pressure and p ′ (x) the roll edge contact pressure.