Aimed at the complex demand of hot strip rolling mill in practicing, the configuration of the coiler and the technological process is analyzed. The arithmetic of coiling tension and the control process is introduced. The frame of the tension adjusting system is given. The coiler control system hardware is designed. The system is designed scientifically with steady control and …

methods and extends the life cycle of measurement device. To show the effectiveness of the self-tuning PI flatness control using the FlatSIL system, computer simulation is executed and the proposed control system is applied to a hot rolling mill in POSCO. 2 Flatness sensing system The inter-stand looper itself would have the same

Automated gauge control (AGC) system has taken a wide area of the recent studies that deals with hot and cold rolling mill. These studies had concentrated to …

Mill control system and method for metal strip rolling con­ ... I.S. Choi, J.A. Rossiter, andPJ Fleming, "Looper and tension control in hot rolling mills: A survey", Journal of Process Control 17 (2007), 509-521. Gerald Hearns Michael J. Grimble, "Robust Multivariable Control

hot rolling mills. We thus consider tandem rolling mills equipped with loopers in this paper. Due to their easy setup, PI force controllers are still the most prevalent controllers for the position of looper rolls (Choi et al., 2007b). More advanced control systems use tension meters (Zhao et al., 2008) to measure the current strip tension.

The control method of tension force has tower-loop control and Looperless control, uses Looperless control in roughing district, in finish rolling district …

Tandem cold rolling process is a nonlinear complex system with external and internal uncertainties and significant disturbances. The improvement in the quality of the final output depends on the control strategy of centerline thickness and interstand tension. This paper focuses on interstand tension control problem in 5-stand tandem cold rolling 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 in the configuration and …

Proceedings of the 19th World Congress The International Federation of Automatic Control Cape Town, South Africa. August 24-29, 2014 Control of Strip Tension in a Rolling Mill Based on Loopers and Impedance Control A. Steinboeck G. M¨ hlberger A. Kugi u Automation and Control Institute, Vienna University of Technology, Gußhausstraße 27-29, 1040 Vienna, …

In hot rolling of wire rod, bars and other long products in continuous rolling mills, the sectional deviations along a rolled material strand are affected by temperature and size [1]. To ensure a stable rolling process with constant product quality, it is therefore necessary to control the rolling process.

The control target in the looper-tension control of HRM (hot rolling mills) is to maintain looper angle and strip tension simultaneously at their desired values.

A survey of tension control methods for rolling mills can be found in [5]. However, tension control in rolling mills is not directly comparable to tension control in slitting lines, since rolling ...

Rolling mill control for tandem rolling: : Clegg: 72/17: 4460852: Method of controlling mill motors speeds in a cold tandem mill: : Kondo et al. 72/8: 4292825: Gauge and tension control system for tandem rolling mill: : Morooka et al. 72/19: 4240147: Gauge control method and system for rolling mill: ...

Hot strip mill tension control: : Edwards: 72/17: 3782153: METHOD AND SYSTEM FOR CONTROLLING A TANDEM ROLLING MILL: : Winchester: 72/9: 3566639: N/A: : Dornbusch: 72/11: 3406547: Automatic gage control and method of operating for rolling mill: : List: 72/8: 3313125: Flexible coupling: : …

Reducing the roll gap increases the roll pressure to p3. Gage control in multiple rolling mills is achieved through measurement of strip thickness using x-ray gage and adjusting the strip tension using feedback control system. 1.8 Rolling defects: Mill spring is a defect in which the rolled sheet is thicker than the required thickness because,

The looper control of a hot strip finishing mill is one of the most important control items in the hot strip rolling mill process. Loopers are placed between finishing mill stands and control the mass flow of the two stands. Another important action of the looper is to control the strip tension which influences the width of the strip. So it is very important to control both the …

The method of controlling the hot strip finishing mill according to claim 1 or 2, wherein when detecting a tension of said rolled material on the basis of the actual values of said rolling force and of said rolling torque, an ith stand torque arm coefficient A 0i is calculated by substituting, into the following formula, an actual value ...

The most common method of making flat rolled products for large diameter pipes is rolling on plate reversible mills [1,2], as well as on continuous rolling mills [3, 4]. A special place is ...

Cold Rolling Plant, Jinan Iron and Steel Group Co Ltd. j inan 250101, Shandong, China) Abstract: In order to lucubrate the rolling characteristic of the two stands reversible cold rolling mill and establish the tension and thickness control strategy, the steady-state characteristic simulating program was established using the steady-state ...

The automatic tension control system of the three-stand continuous roughing train of the 2000 hot-rolling mill at the Magnitogorsk Metallurgical Combine is analyzed. Deviations in interstand tension that are several-fold higher than the set values and inadmissible compression are detected.

different methods of control be it either speed or torque. Lastly we will explore the different types of tension systems including: manual, open loop and closed loop. We will discuss different components and methods used in each, as well as the advantages and disadvantages. This section is intended to help the audience best select the system best

New Rolling Method of Reversing Cold Rolling. A reversing cold rolling mill has been suffering from such drawbacks as unrolled portions necessarily produced in head and tail ends reduce yield, and time consuming works including removing of coils, threading of the strip and holding of the strip with the tension reel, which result in decreasing productivity.

The plant model is a rolling mill that uses a looper for tension control ( Fig. 1 ). Tension is caused by the difference between the exit speed v1 in stand one and the entry speed v2 in stand two. Looper height is related to looper storage length by the mass conservation principle and can be empirically approximated by (1) H (t)= 1 α+β L (t).

The problem of achieving minimum bar tension in a merchant bar rolling mill without direct tension measurement is considered. A non-linear state-space process model which represents the mill dynamics has been developed, and a control scheme is proposed which incorporates an Extended Kalman Filter for estimation of bar tension, and optimal state …

The rolling force prediction stand for a variable. It is a natural way to consider the moving feed forward control. Considering the stand as a average of the signal s (t) spring, the changes in strip thickness ∆h, rolling mill cylinders ∆S and rolling force ∆F, fulfill Hook's law: − 1 t (5) ∆h = ∆S + 1 ∆F (1) s (t) = ∆ ∫ s ...

including hydraulic screwdowns, hydraulic roll bend, and tension control. This book does not focus on these specific rolling mill manufacturers and their various methods of manufacturing and patentability. My intent in this book is to show the modern rolling techniques that

In a tandem rolling mill consisting of a plurality of rolling stands, an interstand tension control method including the step of computing the interstand tension on the basis of the detected values of the rolling force and rolling torque detected at an i-th rolling stand (where i is an integer less by more than one than the total number of the ...

The thickness control and tension establishing process of a five-stand tandem cold rolling mill (TCM) were analyzed using a linearization physical model based on dynamic tension differential equations and the thickness delay method by PHILLIPS . It is the origin of computer simulation of continuous rolling processes.

In a method and a system for controlling an interstand tension in a continuous rolling mill having a looper provided between a pair of successive rolling stands and driven by a looper drive motor, a correction to the speed target value for the looper drive motor is determined in accordance with the deviation of a detected looper operating angle from an angle target value, …