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Hot Rolling Mill Hydraulic Gap Control (HGC) thickness control improvement Peter Kucsera*, Zsolt ... Abstract: In this article the AGC (Automated Gauge Control) system, of a hot rolling mill is analyzed and different methods are described to improve its performance. The mill stretch ... P. Kucsera et al. Hot Rolling Mill HGC Thickness Control ...
last finishing mill, the coiler entered the stage of tension control. Strip tensions are mainly provided between mandrel and pinch roll, between pinch roll and finishing mill. In order to make full use of the motor torque, the tension control system adopts the maximum torque method [2]. The basic control process is: when the mandrel
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 ...
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
Jul 31, 1979· In the control of the tension of a workpiece which is rolled by a tandem rolling mill, a tension control method for a rolling mill wherein the tension of a workpiece is controlled by a looperless tension control method employing no looper at the threading stage of the top end and at the tailout stage, and it is controlled by a tension control method employing a looper during the steady rolling.
Dec 17, 2009· Simulating a MultiStage Rolling Mill Process, Part 3: Tension Control. From the series: Simulating a MultiStage Rolling Mill Process. Alec Stothert, MathWorks. This webinar is the third in a threepart series that highlights the use of MathWorks products for modeling and control of a multistage rolling mill process.
August 2429, 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 2729, 1040 Vienna, Austria (email: [email protected]) Abstract: A mathematical model of a striplooper system of a hot ...
Constant tension control between stands in hot rolling process is essential to enhance the quality of steel. Sensorless tension control is under research by some advanced companies to replace the conventional tension control method because in continuous finishing mill process, it is impossible to install the looper used in conventional control
The problem of achieving minimum bar tension in a merchant bar rolling mill without direct tension measurement is considered. A nonlinear statespace 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 feedback to provide appropriate control action.
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, Strážske. The given roughing mill consists of six rolling stands (STD), individually driven by motors ...
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.
Dec 29, 1981· The invention relates in general to interstand tension control apparatus for a rolling mill, and more particularly to looper control apparatus in a tandem or continuous hot strip rolling mill. The looper is a mechanism installed between any two stands, in a tandem mill installation.
Speed cascade control system for bar and wire rod mills Value Paper Authors: SUN Xin, SUN Hanfeng ... the minimum tension control and loop control are the necessary methods for achieving these. The actual values ... is the output torque of motor in tensionfree rolling; T m
The interstand tension is computed on the basis of the computed torque arms l 1, l 2, and detected rolling torques G 1, G 2 and rolling forces P 1, P 2, and the roll drive main motor is regulated to compensate the deviation of the computed interstand tension from the desired value to maintain the interstand tension constant throughout the ...
Oct 24, 2017· An improved method for automatic tension control is developed. It involves combining speeddifference tension control during free rolling and staticcurrent tension control during multistand rolling on three stands. A functional block diagram of the system implementing the method is .
We describe an integrated tension controller design for a tandem cold rolling mill in steel plants. 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. But it is not sufficient to examine the operation and effect of whole stands because the operation is ...
OUTLINE OF REVERSING COLD ROLLING MILL Outline of reversing cold rolling mill and rolling method As illustrated in Figure 1, a reversing cold rolling mill is structured mainly of a mill proper, a winding machine (payoff ree l), an entry winding machine (tension reel) and a deliverywinding machine (tension .
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
Dec 17, 2009· Simulating a MultiStage Rolling Mill Process, Part 3: Tension Control. From the series: Simulating a MultiStage Rolling Mill Process. Alec Stothert, MathWorks. This webinar is the third in a threepart series that highlights the use of MathWorks products for modeling and control of a multistage rolling mill process. In this webinar, you will ...
A SURVEY OF THE LOOPERTENSION CONTROL TECHNOLOGY IN HOT ROLLING MILLS Il Seop Choi∗, Anthony Rossiter∗, Peter Fleming∗ ∗ Automatic Control Systems Engineering University of Sheffield Sheffield S1 3JD, UK cop01iscsheffi
On the Optimization Procedure of Rolling Mill Design ... can be applied for the realtime crown/shape control using the linear crown control matrix method. ... ksi entry tension, ksi ...
Anbe Y., K. Sekiguchi and H. Imanari, "Tension Control of a Hot Strip Mill Finisher", IFAC 13th ... M. Saito, T. Kataoka, H. Sasao and K. Yabuuchi, "A New Tension Control Method for Hot Strip Finishing Mill", IFAC 10th ... Hearns G. (1999) Advanced Control for Hot Rolling Mills. In: Frank (eds) Advances in Control. Springer, London ...
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 5stand tandem cold rolling mills.
Looper and tension control is important in hot strip mills because they affect the strip quality as well as strip threading. Moreover, the most difficult challenge in controller design and control ...
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