Mathematical and numerical analysis of cross-directional control …

Accordingly, the flatness quality of cold-rolled strip is more important than the thickness profile in CD control, and a shapemeter roll is usually equipped at the end stand of a tandem cold rolling mill, as well as a high-precision flatness control system based on real-time flatness measurement signals is applied to the production process of ...

Industrial shape detecting system of cold rolling strip

A high-precision shape detecting system of cold rolling strip is developed to meet industrial application, which mainly consists of the shape detecting roller, the …

(PDF) Shape control in Sendzimir mills using both crown …

Rolling mill system consists of several mills and the strip to be rolled passes between the mills to control the thickness and shape in hot and cold rolling [1] - [16], which affects the quality ...

Analysis of Shape Control Characteristics for UCMW Cold Rolling Mill

On the basis of the new technique of asymmetric shape control device, anti-symmetric roll bending for universal crown mill (UCM) cold mill, in this article, with ANSYS finite element simulation ...

Shape Control Systems for Sendzimir Cold-rolling Steel Mills …

This paper deals with the shape control methodology for Sendzimir cold-rolling steel mills. Due to the several problems which come from the Sendzimir mills' complicate structure, designing automatic shape control system for these mills was one of the main control issues in cold rolling industries. The multi-variable problem and model …

Metals | Free Full-Text | Research on Shape Control Characteristics …

Aiming at the problem of high precision shape quality of cold-rolled strips, ... Wang, D.C. Simulation of type selection for 6-high cold tandem mill based on shape control ability. J. Cent. South Univ. Technol. 2007, 14, 278–284. [Google Scholar] Zhou, X.M.; Cheng, X.X. The Analysis of Influence on the Edge Drop of Tandem Cold Rolling …

Research on the generation and control of high-order …

The production process of cold rolled wide titanium strip is shown in Fig. 1, including hot rolled coils annealing→ acid pickling after annealing → cold rolling with a 20-high mill → annealing in the middle pass → acid pickling after annealing → cold rolling with a 20-high mill → vacuum annealing → tension and straightening inspection → final cold …

6-High Type Rolling Mill for Cold Rolling | SpringerLink

The HC-MILL has both a good shape stabilizing capacity and good shape control capacity which have never been seen in a conventional 4-High mill. 3 Results and Applications Figure 4 shows the relationship between optimum bending force and intermediate roll position ( text{HC}updelta) for flat shape of the rolled strip, when …

Robust shape control in a sendzimir cold-rolling steel mill

The shape control problem for a Sendzimir 20-roll cold rolling steel mill is characterised by operation over a wide range of conditions arising from roll changes, …

Numerical and experimental analysis of strip cross-directional control …

DOI: 10.1016/J.JMAPRO.2018.07.008 Corpus ID: 139553445; Numerical and experimental analysis of strip cross-directional control and flatness prediction for UCM cold rolling mill

Innovations in Shape Measurement and Control for …

The shape control system coordinates and adjusts the available mill actuators to induce a transverse pressure distribution within the roll bite that causes the on-line, measured stress

Research and Development Trend of Shape Control for Cold Rolling …

Shape is an important quality index of cold rolling strip. Up to now, many problems in the shape control domain have not been solved satisfactorily, and a review on the research progress in the shape control domain can help to seek new breakthrough directions. In the past 10 years, researches and applications of shape control models, …

Prediction of tandem cold-rolled strip flatness based on …

The control of the asymmetric shape of strips has always been an important and difficult part of the production of cold rolling strips. In this paper, the S6-High cold rolling mill is taken as the …

Research on quarter wave shape control of cold rolled high …

Shape control systems for Sendzimir steel mills

The paper compares and contrasts various controller possibilities and is intended to provide a "cookbook" of shape control tools and strategies for Sendzimir mills. Deals with the problem of shape (or flatness) control for Sendzimir 20-roll cold-rolling steel mills. Such mills, with a variety of shape actuators, offer the control engineer considerable choice …

Shape control of alloy steel rolled by sendzimir mill

In order to improve quarter waves occurred in the wide and thin gauged alloy steel rolled by 20-high sendzimir mill, a computer simulation based on the divided element method and an actual cold rolling experiment were carried out. Quarter waves were simulated by elastic deformation analysis of rolls considering bending deformation of back up rolls and the …

AM/NS India

capacity of 2 MTPA, through a 6 Hi mill and a tandem mill. Coils are rolled from between 0.40 mm and 3.2 mm in width and range from 200 mm to 1,625 mm in length. Our Cold Rolled Close Annealed (CRCA) products demonstrate high strength, ductility and uniform mechanical properties with close dimensional control and superior

Robust shape control in a sendzimir cold-rolling steel mill

The shape control problem for a Sendzimir 20-roll cold rolling steel mill is characterised by operation over a wide range of conditions arising from roll changes, changes in rolling schedules and changes in material gauge, width and hardness. Previous approaches to the problem suggest storing a large number of precompensator matrices …

Prediction of shape defects over length of cold rolled sheet …

A model based on an artificial neural network (ANN) has been developed for prediction of flatness of cold rolled (CR) sheet in a tandem cold rolling mill for white goods applications. Various process parameters including roll bending, roll shifting, tensions between stands etc., which affect flatness of CR sheet are considered in the model. …

Comprehensive shape control technology for …

With the increasing demand on higher strip quality, the profile and flatness of hot rolling strips have become subjects of concern, particularly for compact strip product (CSP) hot strip mills. Based on the …

Metals | Free Full-Text | Research on Shape …

Aiming at the problem of high precision shape quality of cold-rolled strips, J. G. Cao et al. proposed a control strategy which is a whole-unit integrated shape for the strip cold rolling mill.

Theory-Intelligent Dynamic Matrix Model of Flatness Control for Cold

Research on Flatness On-Line Intelligent Control for the Wide Strip Steel Cold Mill [D]. Qinhuangdao: Yanshan University, 2008 (in Chinese). ... PENG Yan, ZHENG Zhen-zhong, LIU Hong-min. Simulation Research of Cold Rolled Strip Shape Control in 6-Roller HC Mill [J]. China Mechanical Engineering, 2000, 11(9): 1061 (in Chinese).

Automation for Shape Control in Stainless Cold Rolling Mill

The shape of cold strip for the stainless process has been become issue in quality recently, and hence POSCO developed an automatic control system for strip …

Industrial shape detecting system of cold rolling strip

The shape detecting system was successfully used in Angang 1 250 mm HC 6-high reversible cold rolling mill. The precision of shape detecting is 0.2 I and the shape deviation is controlled within 6 I after the close loop shape control is input.

Intelligent shape control for the whole roll of large cold …

The key problems to be solved in cold-rolled strip shape measurement and control technology are: (1) Develop a shape meter with high detection accuracy, high roll surface quality, reliability and durability. ... Iron and Steel 1720 and Hegang 1550, the large-scale application of the large-scale strip steel tandem cold rolling mill flatness ...

A computational method to predict strip profile in rolling …

Simulation of fuzzy shape control for cold-rolled strip with randomly irregular strip shape. J. Mater. Process. Technol. (1997) B. Berger ... (VCAS) technologies, can significantly enhance the cross-directional control capability of strip mill, and alleviate or eliminate complex high-order flatness defects. In this paper, the mathematical ...

Shape control systems for Sendzimir steel mills

Deals with the problem of shape (or flatness) control for Sendzimir 20-roll cold-rolling steel mills. Such mills, with a variety of shape actuators, offer the control engineer considerable choice in the configuration and design of a shape control system. In addition, the Sendzimir mill is a reversing mill, with shape measurement devices at either end of the …

Shape Controllability for Quarter Buckles of Strip in 20-high …

A simulation model for predicting the shapes of cold-rolled strips in 20-high Sendzimir mills was developed, and its predicting accuracy was assessed experimentally. By this model, improvement of quarter buckles was shown difficult merely by conventional shape control actuators, i.e., lateral shifts and taper profiles of first intermediate rolls, …

Asymmetric Shape Control Ability and Mutual Influence of …

The on-site application shows that optimizing the amount of preset asymmetric shape control can significantly improve the asymmetric situation of the …

Shape and Flatness in the Cold Rolling Process

To achieve this you need an effective roll cooling process in place to reduce defects commonly known as quarter buckle, wavy edge, and full shape or center buckle. Let's discuss the different factors of shape and flatness …

Hot Rolled vs Cold Rolled Steel: What's the Difference?

Ball mill and roller mill; Spray dryers; Clinker cooler; Humidfication; Mist Elimination; ... Cold rolled steel is utilized in a wide range of applications throughout various industries, ranging from industrial buildings to kitchen appliances to filing cabinets. ... SELECTOSPRAY is an indispensable actuator for shape control. It corrects ...

Shape control systems for Sendzimir steel mills

Deals with the problem of shape (or flatness) control for Sendzimir 20-roll cold-rolling steel mills. Such mills, with a variety of shape actuators, offer the control engineer …

(PDF) Flatness Defect in Thin Strip Cold Rolling …

profile in a cold rolled thin strip, and to show how flatness actuators (WRB force, strip tension) can be set up for on- line control of (always possible) variations of friction.

Modeling and validation of bending force for 6-high tandem cold …

As shown in Fig. 3, the UCM 6-high cold rolling mill is based on the ordinary 4-high cold rolling mill with the addition of an intermediate roll that can shift laterally between the work roll and the backup roll.Through the hydraulic roll bending system, applying a variable bending force to the end of the work roll or intermediate roll …

Design of intermediate roll contour and analysis of …

The corresponding objectives and principles of the intermediate roll contour design are proposed to improve the strip edge drop problem in the process of 18-High mill production and enhance the regulation ability on strip shape. The intermediate roll contour is designed using the particle swarm optimisation algorithm to satisfy the production …

Preset model of bending force for 6-high reversing cold rolling mill

The hydraulic roll-bending device was studied, which was widely used in modern cold rolling mills to regulate the strip flatness. The loaded roll gap crown mathematic model and the strip crown mathematic model of the reversing cold rolling process were established, and the deformation model of roll stack system of the 6-high 1 …