tension control method for a rolling mill

    • A BASIC UNDERSTANDING OF THE MECHANICS OF …

      2003-10-15 · Rolls are tools used in rolling mills to reduce the cross section of metal stock. The weight of rolls may vary from a few kilograms up to 250 tonnes. Under rolling conditions the contact area between roll and stock suffers wear, the other parts of a roll - body and necks - have to be considered as normal parts of designed components under high ...

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    • 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

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    • Crown control method for a multi-roll rolling mill ...

      A method is set forth for use in crown control in a multi-roll rolling mill, the method including the steps of: setting in advance a shape of a thermal crown of a work roll corresponding to various rolling conditions and a changing gradient of a mechanical crown for each rolling speed zone applied to a work roll which is determined according to a change in time of a thermal crown relative to a ...

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    • The development of the theory of metal rolling and its ...

      2017-8-9 · The control of rolling is done by a machine, or rolling mill. From a control point of view it is necessary to study the combined behavior of machine and metal deformation to find the variables that may be used to most effectively regulate the process. A …

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    • Tandem rolling mill tension ...

      A BASIC UNDERSTANDING OF THE MECHANICS OF ROLLING MIL…

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    • [PDF] A SURVEY OF THE LOOPER-TENSION CONTROL …

      Abstract Looper and tension control is important in hot strip mills because it affects the strip quality as well as strip threading. Moreover, the most difficult challange in the controller design and control performance comes from the interaction between looper angle and strip tension. Disturbances from several sources also cause a deterioration in control performance, and thus they should be ...

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

      Download Citation | On Jul 1, 2020, A. A. Pushkina and others published Synthesis of Tension Control Systems for Winders of Cold Rolling Mills | Find, read and cite all the research you need on ...

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    • 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. However, it does make the mass flow more stable and hence ...

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    • A study of tension control in looperless hot rolling ...

      2006-5-2 · Final products of hot rolling process are produced to the form of hot coil. The quality of hot coil to be produced is decided by tension control of finishing rolling in hot rolling process. The fluctuation of the strip tension in conventional hot rolling process is controlled through a looper located in between stands. But, the looper can cause a motor trip and tension hunting in hot rolling ...

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    • 8.36 Rolling Mill Controls

      2013-5-18 · 8.36 Rolling Mill Controls K. J. JENTZEN (1985, 1995) B. G. LIPTÁK (2005) ... The DC drive also lends itself to tension control because of its simple current-torque characteristic. It can also provide full negative, or braking, torque to a load when equipped with regenerative capability. One disadvantage of this type of drive

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    • 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-state ...

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    • 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 because ...

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    • ROLLING

      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.

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    • Tandem 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 ...

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    • What Is A Rolling Mill? | Metal Processing Machinery ...

      2021-10-23 · What Is A Rolling Mill? In metalworking, rolling is a metal forming process in which metal stock is passed through one or more pairs of rolls to reduce the thickness and to make the thickness uniform. The concept is similar to the rolling of dough. Rolling is …

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    • 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 on ...

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    • A 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 ...

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    • GAGE 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 ...

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    • Design and Analysis of a Novel Tension Control Method …

      2018-12-18 · The control method of filament winding process is shown in Figure 2 in three levels. The control system can regulate the tension and speed of the filament winding process by governing the output of three different driven rolls—the torque of the unwind roll, the torque of the magnetic powder brake roller, and the speed of the master speed roller.

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    • Control system of interstand tension of continuous rolling ...

      predictive gauge control method and apparatus with adaptive plasticity determination for metal rolling mills: 1971-04-13: smith, jr. 364/472: 3531961: method and system for controlling strip thickness in a tandem reduction mill: 1970-10-06: dunn: 364/472: 3507134: interstand tension control for tandem cold rolling mills: 1970-04-21: silva: 364/472

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

      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.

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    • 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.

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    • 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

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    • WINDER/UNWIND TENSION CONTROL

      2019-4-18 · Notes: The tension is controlled by the brake, although it''s limited capability is somewhat improved by the smooth control of the MLP-Trim. For better performance, the rest of this paper gives a wide range of options for better tension control. Also, for large (core to full roll) diameter changes, the CX-1010 performs better than the MLP-Trim.

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    • Designing of Hot Strip Rolling Mill Control System

      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 …

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    • Technological control for cold rolling processes

      2021-2-16 · Tension feed-forward control The tension feed-forward control responds to entry thickness deviations and applies a suitable adjust-ment to the coiler torque in order to consider the in-teractions between roll gap and tension. Important sensors in a cold rolling mill Laser speed sensor Thickness gauge ABB Stressometer ABB Strip scanner

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    • Improvement of Accuracy for Gauge and Elongation …

      2012-9-14 · each other to establish desired tension values at the entry and exit sides of the mill. Under the tension conditions established by the above control systems, a desired elongation is realized by control-ling the rolling force of the mill by a hydraulic screw-down control system. 2.3 AEC for skin pass mill of continuous processing line

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