scholarly journals Edge-Drop Control Behavior for Silicon Strip Cold Rolling with a Sendzimir Mill

Metals ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 783 ◽  
Author(s):  
Hongbo Li ◽  
Zhenwei Zhao ◽  
Dawei Dong ◽  
Guomin Han ◽  
Jie Zhang ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Cold Rolling ◽  
Process Parameters ◽  
Work Roll ◽  
Rolling Process ◽  
Transverse Flow ◽  
Control Behavior ◽  
Strip Profile ◽  
Sendzimir Mill ◽  
Edge Drop

Edge-drop control is important for silicon strip cold rolling, as the silicon strip is mainly used as a laminated core. Moreover, cold rolling is the key process for the thin strip edge-drop control, and a Sendzimir mill is one of the most popular cold rolling mills for silicon strips. Thus, the mastery of edge-drop control behavior for silicon strip cold rolling with a Sendzimir mill is beneficial for the improvement of the strip profile quality. With the finite element method, two models are built to analyze the edge-drop control behavior, one is the roll system and strip integrated elastic-plastic deformation statics model, and the other is the strip plastic deformation dynamics model. The first model provides the roll gap contour for the second model, then the strip profile can be calculated in the second model, which considers the transverse flow of the metal. Firstly, the compositions of edge-drop for the silicon strip are analyzed systematically, which are the edge-drop for work roll bending, the edge-drop for work roll flattening, and the edge-drop for transverse flow of the metal. Secondly, the influence of different rolling process parameters on the three parts are analyzed, such as the entrance thickness, the rolling reduction, the rolling tension, and so on; further, the influence of the roll contours are also analyzed. Finally, the edge-drop control behavior of the different rolling process parameters and roll contours are obtained. The research results provide theoretical guidance for edge drop control in the Sendzimir mill.

scholarly journals Silicon Steel Strip Profile Control Technology for Six-High Cold Rolling Mill with Small Work Roll Radius

Metals ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 401
Author(s):  
Hainan He ◽  
Jian Shao ◽  
Xiaochen Wang ◽  
Quan Yang ◽  
Xiawei Feng
Keyword(s):  
Cold Rolling ◽  
Rolling Mill ◽  
Steel Strip ◽  
Work Roll ◽  
Rolling Process ◽  
Silicon Steel ◽  
Cold Rolling Mill ◽  
Strip Profile ◽  
Profile Control ◽  
Small Work

Due to the requirement of magnetic properties of silicon steel sheets, producing high-precision size strips is the main aim of the cold rolling industry. The tapered work roll shifting technique of the six-high cold rolling mill is effective in reducing the difference in transverse thickness of the strip edge, but the effective area is limited, especially for a high crown strip after the hot rolling process. The six-high mill with a small work roll size can produce a strip with higher strength and lower thickness under a smaller rolling load. At the same time, the profile of the strip can be substantially improved. By advancing a well-established analytical method, a series of simulation analyses are conducted to reveal the effectiveness of a small work roll radius for the strip profile in the six-high cold rolling process. 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 of the silicon strip is as significant.

scholarly journals Thin Strip Profile Control Capability of Roll Crossing and Shifting in Cold Rolling Mill

2013 ◽  
Vol 773-774 ◽  
pp. 70-78 ◽  
Author(s):  
Abdulrahman Aljabri ◽  
Zheng Yi Jiang ◽  
Dong Bin Wei ◽  
Xiao Dong Wang ◽  
Hasan Tibar
Keyword(s):  
Cold Rolling ◽  
Rolling Mill ◽  
Rolling Force ◽  
Work Roll ◽  
Rolling Process ◽  
Thin Strip ◽  
Strip Rolling ◽  
Strip Shape ◽  
Strip Profile ◽  
Profile Control

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 thin strip are recognised throughout this study. The results show that the roll crossing and shifting is efficient way to control the strip shape. The increase of the work roll crossing angle would lead to improve the strip profile significantly by decreasing the exit strip crown and edge drop. The strip profile would be enhanced if the axial roll shifting was increased. Moreover, the total rolling force was analysed in detail by changing the roll cross angle and axial shifting roll.

scholarly journals Analysis of Thin Strip Profile during Asymmetrical Cold Rolling with Roll Crossing and Shifting Mill

2014 ◽  
Vol 894 ◽  
pp. 212-216 ◽  
Author(s):  
Abdulrahman Aljabri ◽  
Zheng Yi Jiang ◽  
Dong Bin Wei
Keyword(s):  
Cold Rolling ◽  
Shape Control ◽  
Work Roll ◽  
Rolling Process ◽  
Thin Strip ◽  
Asymmetrical Rolling ◽  
Strip Shape ◽  
Strip Profile ◽  
Profile Control ◽  
The One

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 rolling process. In this paper, the influences of cold rolling parameters such as the crossing angle and axial shifting value of work rolls on the strip profile are analysed. The strip shape control is discussed under both symmetrical and asymmetrical rolling conditions. The obtained results are appropriate to control the rolled thin strip profile in practice.

Research on surface topography wear of textured work roll in cold rolling

2015 ◽  
Vol 67 (3) ◽  
pp. 269-275 ◽  
Author(s):  
Dong Xu ◽  
Jie Zhang ◽  
Hongbo Li ◽  
Jinsong Lu ◽  
Qingguo Fan ◽  
...  
Keyword(s):  
Cold Rolling ◽  
Surface Topography ◽  
Abrasive Particle ◽  
Work Roll ◽  
Rolling Process ◽  
Textured Surfaces ◽  
Wear Performance ◽  
Content Type ◽  
Wear Process ◽  
Rolling Surface

Purpose – The purpose of this paper is to build a transient wear prediction model of surface topography of textured work roll, and then to investigate the wear performance of different original textured surfaces. The surface topography of steel sheets is one of the most important surface quality indexes, which is inherited from the textured work rolls in cold rolling. Surface topography of work roll is obviously changing in the cold rolling process. However, surface topography is difficult to measure in the industry production process. Design/methodology/approach – This paper presents a numerical approach to simulate the wear process based on the mixed lubrication model of cold rolling interface developed by Wilson and Sheu (Sheu and Wilson, 1994). It is assumed that wear takes place at locations where the surfaces are in direct contact, and the volume is removed by an abrasive particle which is an abstract concept based on the wear phenomenon of textured work roll. At each simulation cycle, the distribution of the contact pressure is calculated by the lubrication model. The material is removed by an abstract abrasive particle and the surface topography is modified correspondingly. The renewed surface topography is then used for the next cycle. Findings – Through comparative analysis, it can be found that the simulation results possess similar statistical characteristic with the measured data. A set of roughness parameters such as the amplitude, spacing and frequency-domain characteristics are introduced to analyze the wear performance of different textured surfaces. Numerical examples show that the surface topography has a significant effect on the wear performance of work roll in cold rolling. Originality/value – The proposed model can accurately predict the wear process of the surface topography in the cold rolling process, which provides the foundation for optimization of original surface topography of textured work roll. The model can also be considered as a tool applicable for research on control of the surface topography of steel strip in the cold rolling process.

Research on Force Parameter and Deformation Mechanism in the Cold Rolling of Bearing Inner Ring

2011 ◽  
Vol 101-102 ◽  
pp. 534-537
Author(s):  
Bao Shou Sun ◽  
Liang Tao Qi ◽  
Xue Dao Shu
Keyword(s):  
Cold Rolling ◽  
Process Parameters ◽  
Deformation Mechanism ◽  
Rolling Force ◽  
Rolling Process ◽  
Ring Rolling ◽  
Force Parameter ◽  
Finite Element Software ◽  
Deep Groove ◽  
Deform 3D

In this paper, the simulation model of the cold rolling process of the deep groove bearing inner ring was established by using the finite element software Deform-3D. The numerical calculation of the model was made with different process parameters. The law of the influence the process parameters on the rolling force was analyzed. The deformation mechanism of the cold rolling process of the inner ring was revealed. The research indicated that the feed rate of idle roller had the greatest influence on the cold rolling process. Finally the experiment using the XS-50 precision CN ring rolling machine was carried on and a finished product of the inner ring of a better quality came out. It verified that the numerical simulation could provide theoretical basis for the practical production process.

Modelling of Strip Shape and Profile during Cold Rolling of Ultra Thin Strip

2012 ◽  
Vol 706-709 ◽  
pp. 1421-1426
Author(s):  
Zheng Yi Jiang ◽  
Xiao Wei Cheng ◽  
Xiao Zhong Du ◽  
Dong Bin Wei ◽  
Xiao Feng He
Keyword(s):  
Finite Element ◽  
Cold Rolling ◽  
Thickness Distribution ◽  
Element Model ◽  
Work Roll ◽  
Thin Strip ◽  
Asymmetrical Rolling ◽  
Strip Shape ◽  
Experimental Values ◽  
Edge Drop

In this paper, finite element models of the strip shape during cold rolling of ultra thin strip in both symmetrical and asymmetrical rolling cases have been successfully developed, and the strip shape such as the thickness distribution along the strip width has been obtained. The strip shape and edge drop are discussed under both symmetrical and asymmetrical rolling conditions. Simulation results show that the asymmetrical rolling can reduce strip edge drop dramatically. The work roll edge curve also affects strip shape significantly. The developed finite element model has been verified with the experimental values.

Mathematical Model for Temperature Distributions of Work Roll in Aluminum Strip Cold Rolling

2010 ◽  
Vol 150-151 ◽  
pp. 97-101
Author(s):  
De Dong Gao ◽  
Shan Wang
Keyword(s):  
Temperature Distribution ◽  
Cold Rolling ◽  
Contact Region ◽  
Work Roll ◽  
Rolling Process ◽  
Backup Roll ◽  
Friction Heat ◽  
Roll Pressure ◽  
Temperature Distributions ◽  
Aluminum Strip

The temperature distribution of the work roll affects the shape and size of final product in aluminum strip cold rolling process. The segmental model is presented to explore the boundaries of the roll. The surface of the work roll is divided into 5 different regions including the outlet roll-strip contact region, the inlet roll-strip contact (bite) region, the roll-spray region, the roll-air region and the roll-roll contact region. Based on the analysis of the roll pressure, the mathematical models of the plastic doformation work and friction heat are proposed to calculate the temperature variation in bite region. The boundaries, including heat convection with lubricant/air and heat conduction with the backup roll, are considered to model the work roll’s temperature distribution.

Finite Element Analysis of Thin Strip Profile in Asymmetric Cold Rolling Considering Work Roll Crossing and Shifting

2014 ◽  
Vol 1061-1062 ◽  
pp. 515-521 ◽  
Author(s):  
Abdulrahman Aljabri ◽  
Zheng Yi Jiang ◽  
Dong Bin Wei
Keyword(s):  
Finite Element ◽  
Cold Rolling ◽  
Finite Element Model ◽  
Rolling Force ◽  
Element Model ◽  
Work Roll ◽  
Rolling Process ◽  
Thin Strip ◽  
Asymmetric Rolling ◽  
Element Analysis

Cold rolled thin strip has received a great deal of attention through technological and theoretical progress in the rolling process, as well as from researchers who have focused on some essential parameters of strip such as its shape and profile. This paper describes the development of a 3-D finite element model of the shape of thin strip during cold rolling to simulate the cold rolling of WCS (work roll crossing and shifting) in asymmetric rolling. This finite element model considers the asymmetrical rolling parameters such as variations in the diameters of the rolls and the crossing angle as the work roll shifts on the strip during cold rolling. The shape and profile of the strip are discussed in the asymmetrical and symmetrical rolling conditions, while the total rolling force and distribution of stress are discussed in the case where the roll cross angle and axial shifting roll changes. The results can then be used to control the shape and profile of thin strip during rolling.

scholarly journals Comprehensive Analysis of Metal Deformation Law Based on Numerical Simulation of Cold Rolling Process

2020 ◽  
Author(s):  
Zhu-Wen Yan ◽  
Bao-Sheng Wang ◽  
He-Nan Bu ◽  
Hao Li ◽  
Lei Hong ◽  
...  
Keyword(s):  
Finite Element ◽  
Cold Rolling ◽  
Finite Element Model ◽  
Equivalent Stress ◽  
Element Model ◽  
Work Roll ◽  
Rolling Process ◽  
Efficiency Coefficient ◽  
Strip Rolling ◽  
Research Results

Abstract Through taking the cold rolling process as the research object, the three-dimensional finite element model of the strip rolling process is established by using ANSYS/LS-DYNA software. The simulation results of the finite element model have a good fit with the actual production data. The rolling process is dynamically simulated, and the distribution curves of important rolling parameters such as equivalent stress, control efficiency coefficient, transverse rolling pressure, lateral thickness and work roll deflection is obtained. The research results of this paper have strong practicability for the process control of cold strip rolling mill. The research results have certain guiding significance for the development and optimization of the rolling control system.

Analysis of thin strip edge drop formation during cold rolling process

2020 ◽  
pp. 1-11
Author(s):  
Xiawei Feng ◽  
Xiaochen Wang ◽  
Quan Yang ◽  
Jiquan Sun ◽  
Zedong Wu ◽  
...  
Keyword(s):  
Cold Rolling ◽  
Rolling Process ◽  
Thin Strip ◽  
Drop Formation ◽  
Strip Edge ◽  
Edge Drop
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