Intermediate roll shifting (IRS) is widely used for improving the strip shape in the six-high tandem cold mill, but most related studies are limited to a single stand. To fill the knowledge gap, a three-dimensional (3D) multi-stand elastic–plastic finite element (FE) model was developed for a continuously variable crown (CVC)-6 tandem cold mill using …
SmartCrown was a new system developed by VAI for improving the strip profile and flatness control first applied in 1700 mm tandem cold rolling mills at Wuhan Iron & Steel (Group) Corporation (WISCO). After tracing and testing, the application of the conventional crown backup roll matching the SmartCrown work roll of the production mill led to heavy and …
The new SmartCrown profile and flatness control technology was first adopted in a wide strip tandem cold rolling mill. Through studying on the function structure and characteristic parameters, this paper deduced a way to determine the SmartCrown work roll contour. The effect of roll contour characteristic parameters on the roll gap profile was further …
Based on the fact that the backup roll for 2250 CVC tandem mill in hot rolling has serious and non-uniform wear, and the edge spalling often happens, a new backup roll contour named CVR (CVC-VCR ...
It was observed [6] that spalling, cracking, metal In rolling mill operation a four roll high stand tandem mills pick up and subsequently strip welding are three critical factors including two work rolls and two back-up rolls are used to reduce responsible for the poor service life of back-up and work rolls dur- force and power of work roll as ...
DOI: 10.2991/ICADME-15.2015.389 Corpus ID: 110827573; Analysis and optimization of CVC backup roll contour of a 1800mm continuous hot rolling mill @inproceedings{Shang2015AnalysisAO, title={Analysis and optimization of CVC backup roll contour of a 1800mm continuous hot rolling mill}, author={Fei Shang and Hongbo …
A spalled sample from a forged back-up roll used in a 5 stand 4 Hi tandem mill was investigated. The chemical composition and detailed specifications of the forged back-up and work cold rolls are given in Table 1, Table 2, respectively.The sample was washed thoroughly with running distilled water, rinsed and ultrasonically degreased with …
International Journal of Minerals, Metallurgy and Materials (IJMMM, ISSN 1674-4799, CN 11-5787/TF, monthly, started in 1994, formerly known as Journal of University of Science …
Therefore, a novel approach for the roll contour evaluation was proposed by constructing the multi-objective function of the taper-work roll shifting. With edge drop control as the primary goal, the optimal range and suitable range of the WRS for dierent roll contours were calculated for the rst stand of the tandem cold mill.
Abstract. Based on the fact that the backup roll for 2250 CVC tandem mill in hot rolling has serious and non-uniform wear, and the edge spalling often happens, a new backup roll contour named CVR ...
In order to analyze the influence of technical parameters on work roll axial force of four-high continuous variable crown (CVC) mill, the deformation analyzing model with top roll system and strip was established based on influence function method. Then a CVC work roll curve designing scheme was proposed and it was carried out on some cold rolling mill …
For the SmartCrown tandem cold mill, two aspects of work have been done: one is proposing the Smart-Crown plus work roll contour based on the optimization of …
And the optimal roll contour parameters were applied to a 6-High five-stand tandem cold rolling mills, which improved the flatness quality of the DP780 steel strip . Based on the design technology of VCR back-up roll contours with variable contact lengths and considering the cooperation between the middle of the back-up roll and the …
The optimal roll profile parameters were applied to a six‐high five stand tandem cold rolling mills, which improved the flatness quality of the DP780 steel strip. Abstract: The multi‐objective optimization of the SmartCrown intermediate roll profile for a cold rolling mill was proposed in this paper in order to improve the strip flatness ...
1. Introduction. The typical configuration of a four high rolling mill comprises four rolls: two work rolls (WRs) in contact with the strip to deform it and two backup rolls (BURs) supporting and transmitting the rolling forces [].BURs are normally produced of steel 5% Cr and quenched and tempered on the surface, obtaining a layer of hard …
1200 mm narrow strip for a 2180-mm tandem cold rolling mill, and the work roll contour optimization was proposed to solve the control problem for narrow strip flatness. However, the roll contour was only suitable for a certain strip width and cannot simultaneously address the prob-lem of strip flatness for both narrow strip and ultra-wide strip.
Request PDF | Backup roll contour of a SmartCrown tandem cold rolling mill | SmartCrown was a new system developed by VAI for improving the strip profile …
The integrated design of roll contours for EDW (Edge Drop Control Work Rolls) and matched VCR (Varying Contact Backup Rolls) were developed to decrease …
Based on the fact that the backup roll for 2250 CVC tandem mill in hot rolling has serious and non-uniform wear, and the edge spalling often happens, a new backup roll contour named CVR (CVC-VCR ...
The results show that the new intermediate roll contour markedly enhance profile and flatness control ability of rolling mill compared with the conventional one, work roll bending control effect ...
The roll deformation model of the six-high rolling mill is one of the core models of the strip shape control theory. The influence function method (IFM) is a numerical method applied to solve the roll deformation problem. This study aims to address the problems of slow calculation speed and insufficient calculation accuracy of IFM in …
Vibration issues of a five-stand tandem cold rolling mill were found in the steel production practice, and the experimental observation and numerical analysis indicated that the vibrations were related to the back-up roll bearing. The results were validated by replacing the back-up roll bearing with the new bearing resulting in 30% …
1 Integrated Design of Roll Contours for Strip Edge Drop and Crown Control in Tandem Cold Rolling Mills Cao Jian-guoa,b,*, Chai Xue-tinga, Li Yan-lina, Kong Ninga, Jia Sheng-huic, Zeng Weic a School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China
During the hot strip tandem rolling (HSTR) process, the strip is compressed and elongated continuously, causing significant elastic deformation of rolls. At the same time, the strip temperature undergoes rapid increase and decrease, and distributes unevenly along the strip width direction. Elastic deformation of rolls and strip temperature …
The usual products of these mills are hot and cold plates and sheets. 4. Cluster Rolling Mill ... In the planetary mill type of rolling machine, a large backup roller is surrounded by a number of planetary working rollers as shown in the figure. ... In this tandem mill types of rolling mills, It includes a number of non-reversing two-high ...
DOI: 10.1016/J.JMATPROTEC.2017.09.038 Corpus ID: 140093884; Integrated design of roll contours for strip edge drop and crown control in tandem cold rolling mills @article{Cao2018IntegratedDO, title={Integrated design of roll contours for strip edge drop and crown control in tandem cold rolling mills}, author={Jianguo Cao and Xue …
The optimal roll profile parameters were applied to a six‐high five stand tandem cold rolling mills, which improved the flatness quality of the DP780 steel strip. ... roll contour configuration ...
DOI: 10.1016/S1005-8850(08)60067-5 Corpus ID: 109060714; Backup roll contour of a SmartCrown tandem cold rolling mill @article{Yang2008BackupRC, title={Backup roll …