Home>Products

Tension Control Method For A Rolling Mill

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

    2007-7-1 · Looper and tension control, shown in Fig. 2, is important in hot strip mills because they affect both the dimensional quality and the mass flow of a strip.The high strip tension between stands induces width shrinkage, thickness reduction and moreover can produce an edge wave on a strip.Control of Strip Tension in a Rolling Mill Based on,2014-7-16 · Strip Mill stand Looper Fig. 1. Tandem rolling mill with ve mill stands. tension as this control approach facilitates a systematic consideration of constraints and the multiple interactions between loopers and mill stands. Choi et al. (2007a) ana-lyzed MPC formulations featuring robustness against dis-turbanceswith known

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

    2011-6-1 · In this paper, the unified gauge-tension control problem is formulated by defining the exit strip thickness of stands and interstand tensions as controlled outputs. It is shown that cold rolling process can be described by a nominal model perturbed by an additive uncertainty. This model is used to design a robust tracking controller, based on H∞ control theory, to ensure robust stability andTandem rolling mill tension control with speed ratio error,I claim: 1. A method for controlling interstand strip tension in a metal cold rolling mill having at least two rolling stands, each with at least one pair of opposed workrolls for reducing the thickness of a metal workpiece passed therebetween, tension sensing means for sensing strip tension between adjacent stands, means for sensing the rolling speed of each stand, and tension control means

  • Tension and Thickness Control Strategy Analysis of Two

    2012-10-1 · 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-stateA SURVEY OF THE LOOPER-TENSION CONTROL ,2011-7-20 · and mass flow in hot rolling mills can be satisfied by proper control of the strip tension and looper angle. Figure 1 shows the tension and looper control in a typical finishing mill. Traditionally, looper angle control has been per-formed by changing the rotating speed of a main motor but there has been no tension feedback control because

  • FUZZY TENSION CONTROL OF THE WIRE ROD

    2017-2-1 · 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 motorsGAGE CONTROL METHOD AND SYSTEM FOR TANDEM ,In accordance with the present invention, a final gage control system and method for a tandem rolling mill are provided wherein final gage is varied by varying tension in the strip material being rolled between the last two stands while the roll force exerted on the strip by the last stand is maintained constant for all variations in last stand

  • ROLLING Primetals Technologies

    2018-2-21 · ing mill, which is why Primetals Technologies has devel-oped model-based strip-width control. Recognizing that tension can be used to manipulate the strip width in the finishing mill, model-based width control compensates for width deviations. Width deviations are measured in front of and after the finishing mill.Basics of Web Tension Control Summary,2007-10-18 · 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

  • Tension Alterations at Rolling Torque Fluctuation in the

    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 isA SURVEY OF THE LOOPER-TENSION CONTROL ,2011-7-20 · and mass flow in hot rolling mills can be satisfied by proper control of the strip tension and looper angle. Figure 1 shows the tension and looper control in a typical finishing mill. Traditionally, looper angle control has been per-formed by changing the rotating speed of a main motor but there has been no tension feedback control because

  • Looper and Tension Control in the Hot Strip Finishing Mill

    Since tension and looper height control is the key to successful mill operations, several multivariable control schemes have been applied to cope with interactions between tension and the looper. However, they lead to complicated controllers which are hard to be tuned on site. The proposed method is based on decentralization and coordination.THE MECHANICS OF TENSION CONTROL,2019-2-18 · forces by actually decreasing web tension as the roll builds. The amount of taper tension is normally measured in percentage of set tension. For example, using the same 3.5 inch core diameter and 35 inch outside roll diameter, if taper tension was set to 50%, the tension will be linearly decreased from 3.5 inch core to 35 inch roll diameter so the

  • ROLLING Primetals Technologies

    2018-2-21 · ing mill, which is why Primetals Technologies has devel-oped model-based strip-width control. Recognizing that tension can be used to manipulate the strip width in the finishing mill, model-based width control compensates for width deviations. Width deviations are measured in front of and after the finishing mill.1. Hot rolling and rolling defects: 1.1 Front and back,2019-2-4 · 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,

  • Modeling and Control of Multi Stage Rolling Mill Process

    2016-9-1 · Modeling and Control of Multi Stage Rolling Mill Process. Sheet Rolling Mill processes involve progressive thickness reduction of continuous sheet metal in multiple stages. Some of the control variables of interest are exit thickness, throughput and the tension in the sheet as it passes from one stage to the other.Flatness control of strip in continuous hot rolling processes,2010-7-14 · 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

  • FEATURING ROLLING AND PROCESSING

    2018-3-13 · to roll-gap control while the strip tension is kept constant. In this solution approach, the looper measures the strip tension between the stands and the looper position remains constant. This type of switchable control is applied at each finishing mill stand. A flexible control approach allows a smooth strip transition between the mill stands.Basics of Web Tension Control Summary,2007-10-18 · 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

  • A SURVEY OF THE LOOPER-TENSION CONTROL

    2011-7-20 · and mass flow in hot rolling mills can be satisfied by proper control of the strip tension and looper angle. Figure 1 shows the tension and looper control in a typical finishing mill. Traditionally, looper angle control has been per-formed by changing the rotating speed of a main motor but there has been no tension feedback control becauseSimulating a Multi-Stage Rolling Mill Process, Part 3,2009-12-17 · Simulating a Multi-Stage Rolling Mill Process, Part 3: Tension Control. This webinar is the third in a three-part series that highlights the use of MathWorks products for modeling and control of a multistage rolling mill process. In this webinar, you will learn how to design PID controllers for managing tension in a multistage rolling mill process.

  • Real-time tension control in a multi-stand rolling system

    The problem of real-time tension control in a metal-strip processing line is addressed. The tension in a metal strip changes due to not only the speed difference but also thickness changes at the ends of a span. The mathematical dynamic model which describes relationship between the tension change and the roll-speed change is improved to include the effect of the strip thickness change onA Flatness Based Approach for the Thickness Control in,2012-10-23 · Keywords: rolling mill, multi-stand mill, thickness con-trol, tension control, flying gauge change, non-linear control, flatness based control. Abstract A multi-stand rolling mill is a highly complex coupled non-linear system. If the operating point is changing in a wider range the non-linearities can no longer be neglected in the controller

  • THE MECHANICS OF TENSION CONTROL

    2019-2-18 · forces by actually decreasing web tension as the roll builds. The amount of taper tension is normally measured in percentage of set tension. For example, using the same 3.5 inch core diameter and 35 inch outside roll diameter, if taper tension was set to 50%, the tension will be linearly decreased from 3.5 inch core to 35 inch roll diameter so the1. Hot rolling and rolling defects: 1.1 Front and back,2019-2-4 · 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,

  • Modeling and Control of Multi Stage Rolling Mill Process

    2016-9-1 · Modeling and Control of Multi Stage Rolling Mill Process. Sheet Rolling Mill processes involve progressive thickness reduction of continuous sheet metal in multiple stages. Some of the control variables of interest are exit thickness, throughput and the tension in the sheet as it passes from one stage to the other.ROLLING Primetals Technologies,2018-2-21 · ing mill, which is why Primetals Technologies has devel-oped model-based strip-width control. Recognizing that tension can be used to manipulate the strip width in the finishing mill, model-based width control compensates for width deviations. Width deviations are measured in front of and after the finishing mill.

  • FEATURING ROLLING AND PROCESSING

    2018-3-13 · to roll-gap control while the strip tension is kept constant. In this solution approach, the looper measures the strip tension between the stands and the looper position remains constant. This type of switchable control is applied at each finishing mill stand. A flexible control approach allows a smooth strip transition between the mill stands.Basics of Web Tension Control Summary,2007-10-18 · 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

  • Contact Us

    Company Address

    Pudong New Area, Shanghai, China.

    E-mail Address

    [email protected]

    Sales Hotline

    0086-371-86162511

    You can reach us by:

    If you are interested in our company or products, welcome to visit our company or local offices; you can also get contact with us through online consulting, demand table submission, e-mails and telephones. Our staff shall wholeheartedly provide product information, application knowledge and good service for you.
    Copyright © 2019 SKD Industry & Technology Group Co., Ltd.