scholarly journals Dataset showing steel cold rolling process parameters for a 6-high cold rolling mill in Nigeria

Data in Brief ◽  
2018 ◽  
Vol 18 ◽  
pp. 891-901
Author(s):  
Emmanuel O. Ayuba ◽  
Christian.A. Bolu ◽  
Temitope M. John ◽  
Abiodun A. Abioye
Keyword(s):  
Cold Rolling ◽  
Process Parameters ◽  
Rolling Mill ◽  
Rolling Process ◽  
Cold Rolling Mill

Thickness Indirect Measurement Method for Direct Pulling Pilot Cold Rolling Mill

2011 ◽  
Vol 189-193 ◽  
pp. 2670-2674
Author(s):  
Zhi Jie Jiao ◽  
Chun Yu He ◽  
Jian Ping Li ◽  
Xiang Hua Liu
Keyword(s):  
Cold Rolling ◽  
Rolling Mill ◽  
Measurement Method ◽  
Rolling Process ◽  
Indirect Measurement ◽  
Cold Rolling Mill ◽  
Movement Data ◽  
Program Flow ◽  
New Type ◽  
Exit Speed

Pilot cold rolling mill is the important tool for the cold rolling process researching and new steel grade development. According to the design of the new type direct pulling pilot cold rolling mill, based on the mass flow constant principle, strip exit thickness indirect measurement method is studied. During rolling, strip entry and exit speed can be calculated accurately according to the measured value of two sides’ clamps movement. Data filtering treatment is adopted and program flow chart is designed. Based on the material entry thickness measured manually, exit thickness of all passes can be measured indirectly. This thickness indirect measurement method has been applied successfully on the new type pilot cold rolling mill, and the measurement results show that this method has a good accuracy.

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 Investigation and Optimization of Load Distribution for Tandem Cold Steel Strip Rolling Process

Metals ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 677 ◽  
Author(s):  
Xin Jin ◽  
Changsheng Li ◽  
Yu Wang ◽  
Xiaogang Li ◽  
Yongguang Xiang ◽  
...  
Keyword(s):  
Genetic Algorithm ◽  
Cold Rolling ◽  
Prediction Model ◽  
Load Distribution ◽  
Rolling Mill ◽  
Fitness Function ◽  
Steel Strip ◽  
Rolling Process ◽  
Cold Rolling Mill ◽  
Tandem Cold Rolling

In order to improve the cold rolled steel strip flatness, the load distribution of the tandem cold rolling process is subject to investigation and optimization. The strip deformation resistance model is corrected by an artificial neural network that is trained with the actual measured data of 4500 strip coils. Based on the model, a flatness prediction model of strip steel is established in a five-stand tandem cold rolling mill, and the precision of the flatness prediction model is verified by rolling experiment data. To analyze the effect of load distribution on flatness, the flatness of stand 4 is calculated to be 7.4 IU, 10.6 IU, and 16.8 IU under three typical load distribution modes. A genetic algorithm based on the excellent flatness is proposed to optimize the load distribution further. In the genetic algorithm, the classification of flatness of stand 4 calculated by the developed flatness prediction model is taken as the fitness function, with the optimal reduction of 28.6%, 34.6%, 27.3%, and 18.6% proposed for stands 1, 2, 3, and 4, respectively. The optimal solution is applied to a 1740 mm tandem cold rolling mill, which reduce the flatness classification from 10.8 IU to 3.2 IU for a 1-mm thick steel strip.

Vertical Vibration Characteristics Analysis of Stand Rolls System in Six-Roll Cold Tandem Mill

2013 ◽  
Vol 470 ◽  
pp. 572-576 ◽  
Author(s):  
Ying Zhang ◽  
Li Liu ◽  
Pei Ming Shi ◽  
Bin Liu
Keyword(s):  
Cold Rolling ◽  
Natural Frequency ◽  
Rolling Mill ◽  
Rolling Process ◽  
Vertical Vibration ◽  
Vibration System ◽  
Cold Rolling Mill ◽  
Third Order ◽  
The Third ◽  
Characteristics Analysis

A dynamic model of seven degree of freedom for the vertical vibration of stand rolls system in a cold tandem mill is developed by Kinematics Theory. According to the actual parameters of a factory six-roll cold rolling mill, the influence of natural frequency and modes for rolling process is analyzed. It finds that the third-order and the six-order natural frequency play a role key in vertical vibration system. Combined with energy distribution of each part and flexibility of the modes analysis for vertical vibration system, it can avoid resonance of rolling process and optimize the parameters of stand rolls system by adjusting structural size appropriately. The above mentioned results have provided a reference for further research on Kinematics and structural optimization of six-roll cold tandem mill.

1450 Cold Rolling Mill Rack Finite Element Modal Analysis

2014 ◽  
Vol 936 ◽  
pp. 1890-1893
Author(s):  
De Chen Zhang ◽  
Chao Wen Dong ◽  
Ming Yang ◽  
Yan Ping Sun
Keyword(s):  
Finite Element ◽  
Cold Rolling ◽  
Dynamic Analysis ◽  
Modal Analysis ◽  
Natural Frequency ◽  
Rolling Mill ◽  
Rolling Process ◽  
Cold Rolling Mill ◽  
Finite Element Software

The vibration of the fifth frame mill of 1450 Cold Tandem Rolling Mill in the rolling process was studied using finite element software ANSYS. The dynamic analysis of one-piece frame and two-piece frame on the fifth frame mill were carried on. The natural frequency and mode of vibration were calculated. Through analyzing, we obtained that two-piece frame performed better.

scholarly journals Stability Analysis of a Nonlinear Coupled Vibration Model in a Tandem Cold Rolling Mill

2019 ◽  
Vol 2019 ◽  
pp. 1-14 ◽  
Author(s):  
Xing Lu ◽  
Jie Sun ◽  
Guangtao Li ◽  
Zhenhua Wang ◽  
Dianhua Zhang
Keyword(s):  
Hopf Bifurcation ◽  
Cold Rolling ◽  
Rolling Mill ◽  
Vertical Direction ◽  
Rolling Process ◽  
Cold Rolling Mill ◽  
Mass System ◽  
Hopf Bifurcation Point ◽  
Tandem Cold Rolling ◽  
Vibration Model

Mill chatter in tandem cold rolling mill is a major rejection to the quality and production of the strips. In most mill vibration models, either the roll mass is usually limited to vibrate in vertical direction and vertical-horizontal directions, or the multiple rolls system is simplified to a single mass system. However, the torsional chatter is also a typical type of mill chatter, and the presence of intermediate roll and backup roll will affect the overall vibration of the mill structure system. In this paper, a newly cold rolling mill vibration model coupled with the dynamic rolling processing model and nonlinear vibration model is proposed with the consideration of dynamic coupling and nonlinear characteristics of the rolling process, multiroll equilibrium, and roll movement in both vertical-horizontal-torsional directions. By using Hopf bifurcation theorem and Routh–Hurwitz determinant, the existence of the Hopf bifurcation point of the mill vibration system and bifurcation characteristics are analyzed. At last, the influence of different rolling conditions on the stability of the coupled mill system is investigated, and these results can also be used to design an optimum rolling schedule and determine the appearance of mill chatter under certain rolling conditions.

Developing an effective diagnosis for safety improvement in steelworks

2005 ◽  
Vol 4 (4) ◽  
pp. 229-240
Author(s):  
A.R. Hale ◽  
H.A. v.d. Waterbeemd ◽  
R. Potter ◽  
B.H. Heming ◽  
P.H.J.J. Swuste ◽  
...  
Keyword(s):  
Control System ◽  
Cold Rolling ◽  
Rolling Mill ◽  
Safety Management ◽  
Risk Control ◽  
Cold Rolling Mill ◽  
Rich Picture ◽  
Safety Improvement ◽  
Effective Diagnosis ◽  
Current Risk

The paper describes the methods used for a study of the safety management system and culture of a cold rolling mill in a steel plant. It uses data from diverse sources which can be validated against each other and combined to produce a rich picture of the current risk control system and its shortcomings. The paper also describes the proposed improvements and what the plant chose to implement. This step also throws light on the culture of the plant.

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