(PDF) Unified gauge-tension control in cold rolling mills ...

Unified gauge-tension control in cold rolling mills: A robust regulation technique ... A Control Method for Improvement in the Tandem Hot Metal Strip Rolling Process. By John Pittner. Agent based Simulation of Hot Strip Rolling Mills with Controllers.

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US4507946A - Method and system for controlling an ...

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, and the looper drive ...

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Control of Strip Tension in a Rolling Mill Based on ...

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.

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Looper and tension control in hot rolling mills: A survey ...

Jul 01, 2007  An observer-based multivariable tension control , was developed to improve tension control accuracy at strip threading time and applied to aluminium hot rolling mills. The approach used control pairings such that the changing rolling speed of the upper stand controls strip tension while torque of a hydraulic looper controls looper angle; this ...

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CN104785542B - A kind of roughing mill tension adjustment ...

The present invention relates to a kind of roughing mill tension adjustment control method, the method set in rolling by host computer required for the tension force that reaches, by master cpu by Real-time Collection rack level roller and the rolling load of edger roll and speed, calculate the actual tension of slab in frame, master cpu, according to actual tension and the deviation value of ...

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Automatic Tension Control in the Continuous Roughing Train ...

Oct 24, 2017    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.

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The Study of Continuous Rolling Mill Inter-stand Tension ...

Jan 01, 2015  It analyses the operation of the rolling mill using different system for tension inferential control. The finished studies prove that size alignment is provided with the tension control system affecting speed of the further stands. The paper verifies that the characteristics of the rolling mill including aligning ability depend on the rolling ...

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The Study of Continuous Rolling Mill Inter-stand Tension ...

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 ...

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Synthesis of Tension Control Systems for Winders of Cold ...

Oct 02, 2020    In tension control systems, the node for dynamic compensation of disturbance caused by a change in the speed of the rolling stand of cold-rolled sheet mills can contain only one channel that compensates only for the dynamic component. The limitation of the disturbance component due to the inaccuracy in the operation of the indirect torque ...

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Rolling of Steel in a Modern Long Product Rolling Mill ...

Jun 19, 2017  As the bar progresses through a continuous mill where the bar is rolled in multiple stands simultaneously, the stand speed must be controlled to ensure tension free rolling. The main methods of controlling the tension in the mill is with a tension free rolling speed control system and manually monitoring the current drawn by each motor as the ...

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Control of Strip Tension in a Rolling Mill Based on ...

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.

More

Control of Strip Tension in a Rolling Mill Based on ...

Jan 01, 2014  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, Austria (e-mail: [email

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Looper and tension control in hot rolling mills: A survey ...

Jul 01, 2007  An observer-based multivariable tension control , was developed to improve tension control accuracy at strip threading time and applied to aluminium hot rolling mills. The approach used control pairings such that the changing rolling speed of the upper stand controls strip tension while torque of a hydraulic looper controls looper angle; this ...

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Control of strip tension in a rolling mill based on ...

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.

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FUZZY TENSION CONTROL OF THE WIRE ROD ROUGHING

tension. In general, rolling with low tension in roughing mill is a fundamental condition to ensure the stable rolling quality [2], [3]. This paper proposes the fuzzy control structure for the roughing mill in Slovakia Steel Mills, a.s. Strážske. The given roughing mill consists of six rolling stands (STD), individually driven by motors ...

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Tandem rolling mill tension control with speed ratio error ...

Rolling mill control for tandem rolling: 1987-09-08: Clegg: 72/17: 4460852: Method of controlling mill motors speeds in a cold tandem mill: 1984-07-17: Kondo et al. 72/8: 4292825: Gauge and tension control system for tandem rolling mill: 1981-10-06: Morooka et al. 72/19: 4240147: Gauge control method and system for rolling mill: 1980-12-16 ...

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The Study of Continuous Rolling Mill Inter-stand Tension ...

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 ...

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Robust Tension Control of Strip for 5-Stand Tandem Cold Mills

Various advanced methods have been developed to analyze and control rolling mills [6–11]. Among the previous investigations, some notes focus on tension control problem in cold rolling mills [12, 13]. There are numerous uncertainties and disturbances in the model of tandem cold rolling process . Thus, the control strategy for cold rolling ...

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Technological control for cold rolling processes

AGC for foil mills Speed-tension optimization is used in foil mill appli-cations, since the strip thickness depends very closely on tension and rolling speed. In order to achieve maximized material throughput, the speed of the stand is increased until the strip tension has reached its control

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Rolling mill looper control system - Westinghouse Electric ...

AUTOMATIC CONTROL METHOD AND APPARATUS FOR A ROLLING MILL: 1974-11-19: Peterson: 72/205: 3399556: Strip tension control for a rolling mill: 1968-09-03: Bensema et al. 72/21: 3332263: Computer control system for metals rolling mill: 1967-07-25: Beadle et al. 72/7: 3237439: Tension control system: 1966-03-01: Torrance: 72/205: 3169422: Tension ...

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Unwind/rewind eccentricity control for rolling mills ...

2. A method of controlling a rolling mill receiving material to be rolled from an unwind coil of the material, which coil includes means for driving the same in a manner that maintains the material between the mill and coil in tension, the unwind coil producing a cyclic disturbance in said tension, the method

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Fuzzy looperless tension control for hot strip rolling ...

Feb 16, 2009  Currently, human operators are still employed in many rolling mills to manually suppress looperless interstand tensions. Having recognized the complexity of the process and the effectiveness of human-based control, a fuzzy control method is proposed for regulating looperless interstand tension.

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Synthesis of Tension Control Systems for Winders of Cold ...

Oct 02, 2020  In tension control systems, the node for dynamic compensation of disturbance caused by a change in the speed of the rolling stand of cold-rolled sheet mills can contain only one channel that compensates only for the dynamic component. The limitation of the disturbance component due to the inaccuracy in the operation of the indirect torque ...

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MILL CONTROL SYSTEM AND METHOD FOR CONTROL OF

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

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Control of Strip Tension in a Rolling Mill Based on ...

Jan 01, 2014  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,

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The Study of Continuous Rolling Mill Inter-stand Tension ...

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 ...

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Minimum Tension in a Merchant Bar Rolling Mill using ...

Aug 01, 1990  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

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Modeling and Analysis of Interstand Tension Control in 6 ...

To achieve stable rolling and ensure strip quality, it is very important to control the tension of the cold rolling mill. Previous researches examined only the operation of a single stand.

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Basics of Web Tension Control Summary

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

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60 YEARS OF ROLLING MILL TECHNOLOGY By Ford B. Cauffiel

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

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Control device for a continuous hot-rolling mill ...

A control device for the purpose of achieving highly precise rolled material. The response and robust stability of the rolled material tension and looper height are specified, and a controller is designed so that the rolling mill main motor and looper operate in concert to suppress variations in rolled material tension, thereby achieving stable optimum control which is responsive to the ...

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1. Hot rolling and rolling defects: 1.1 Front and back ...

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,

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(PDF) On the Optimization Procedure of Rolling Mill Design

A review is given of the most modern control systems for automatic shape monitoring in aluminum rolling mills. Such a system not only improves the

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Rolling Mill - an overview ScienceDirect Topics

The first process is the rolling mill; and the second one the glass tube drawing process. The extension of the least-squares method to multi-input multi-output (MIMO) process will be discussed when treating the problems. 4.3.1. Identification and Control of the Rolling Mill

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Interstand strip gauge and profile conrol - Danieli United ...

Mar 24, 1994  Hot strip mill tension control: 1976-08-31: Edwards: 72/17: 3782153: METHOD AND SYSTEM FOR CONTROLLING A TANDEM ROLLING MILL: 1974-01-01: Winchester: 72/9: 3566639: N/A: 1971-03-02: Dornbusch: 72/11: 3406547: Automatic gage control and method of operating for rolling mill: 1968-10-22: List: 72/8: 3313125: Flexible coupling: 1967-04-11:

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Synthesis of Tension Control Systems for Winders of Cold ...

Oct 02, 2020  In tension control systems, the node for dynamic compensation of disturbance caused by a change in the speed of the rolling stand of cold-rolled sheet mills can contain only one channel that compensates only for the dynamic component. The limitation of the disturbance component due to the inaccuracy in the operation of the indirect torque ...

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Unified gauge-tension control in cold rolling mills: A ...

This paper focuses on interstand tension control problem in 5-stand tandem cold rolling mills. Tension dynamics can be described by a nominal model perturbed by parametric uncertainties.

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Metal Rolling - Manufacturing Process

In a metal rolling process, rolls, stands, bearings, housing, motors, and other mechanical equipment are all a necessary part of the manufacturing operation. The place where all the equipment for metal rolling manufacture is set up is called a rolling mill. Rolling mills often vary in the type, number, and position of rolls.

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