How To Control Eccentricity Problem In Hot Rolling Mill

  • Roll Eccentricity Control for Strip Rolling Mills ...

    An in-depth review of the roll eccentricity control design problem is provided which encompasses a number of recent, novel, design contributions and includes experimental results from two separate steel, tandem cold rolling mill installations.

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  • HOT ROLLING PRACTICE – An Attempted Recollection

    1 HOT ROLLING PRACTICE – An Attempted Recollection Saral Dutta. B. Tech. (Hons.), I.I.T. Executive Director, ISP & RMD, SAIL (Retired) Rolling is a metal forming process in which metal stock is passed through a pair of rolls.

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  • Reversing Cold Mill | Primetals Technologies

    REVERSING COLD MILL Advanced reversing cold-mill technology from Primetals Technologies is an ideal solution for small- to medium-sized production capacities, or for the rolling of smaller order lots of special steel grades.

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  • Upgrading of Hot Finishing Mill to 4-Stands, and ...

    an overview of the hot finisher mill after the upgrade, and describes the new control technology and hot rolling pro-cess control system that were introduced. 2. GENERAL DESCRIPTION The hot rolling mill of the Fukui Works went into service in May, 1983 as a world-class facility, equipped with large rolling …

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  • Gage control system for rolling mill - , Ltd.

    Jul 19, 1977· Gage control system for rolling mill . United States Patent 4036041 ... The eccentricity control unit serves to detect the roll eccentricity on the basis of a correlation principle and compensate for or cancel the effects of the feed back of the rolling pressure upon the occurrence of the roll eccentricity. ... it is an important problem ...

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  • Unwind/rewind eccentricity control for rolling mills ...

    Mar 06, 1990· It has been discovered that variations in the thickness of metal strip entering and/or leaving a rolling mill resulting from cyclic conditions associated with coils of the strip that can be substantially reduced, if not eliminated all together, by direct application of the eccentricity control algorithm disclosed in U.S. Pat. Nos. 4,222,254 ...

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  • Hot rolling and rolling defects - nptel.ac.in

    1.7 Rolling mill control: Production of continuous sheets and strips is one of the attractive features of modern rolling mills. However, control of sheet thickness and cross-section is a real challenge. In order to continuously monitor the thickness of sheets rolled, x-ray or gamma ray sensors are used.

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  • US4580224A - Method and system for generating an ...

    In hot and cold rolling mills the eccentricity of the backup roll or rolls causes substantial difficulties, one of which is variation in the gauge of the strip being rolled. This is caused by a change in the opening between the working rolls during the processing of the workpiece, work or strip. ... Stability problems in the control …

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  • A SURVEY OF THE LOOPER-TENSION CONTROL …

    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 …

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  • how to control eccentricity problem in hot rolling mill

    how to control eccentricity problem in hot rolling millA SURVEY OF THE LOOPER-TENSION CONTROL 20 and mass flow in hot rolling mills can be satisfied by proper c

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  • Methods To Control Eccentricity In Forged Rolls

    Extending UMLRT for Control System modeling and design methods and realtime scheduling theory is the key to Roll Speed Control and Roll Eccentricity. Roll Eccentricity Control for Strip Rolling Mills . An indepth review of the roll eccentricity control design problem is provided which encompasses a number of recent, novel, design contributions ...

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  • Improvement of thickness tolerances in aluminium cold ...

    After the successful simulation study, the control concepts were implemented on the two-stand cold rolling mill. In observation mode the functions for eccentricity and hardness compensation could be monitored and preoptimized in parallel to normal operation with no effect on the current operation of the mill.

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  • hot rolling mill roll eccentricity - pochiraju.co.in

    Automation and Control in Iron and Steel Industries - eolss. thickness and flatness of strip in hot and cold rolling mills. ... Nearly two-thirds of the total weight of rolled products consists of flat, and only one- ..... roll eccentricity control, the modeling of hydrodynamics and chemical processes in a newly...

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  • Hot Rolling Mill Hydraulic Gap Control (HGC) thickness ...

    – 99 – P. Kucsera et al. Hot Rolling Mill HGC Thickness Control Improvement Figure 6 Effect of roll eccentricity on output strip thickness Figure 7 Thickness control loop with eccentricity thickness deviation as a disturbance The hot rolling mill environment is quite harsh, so the X-ray thickness gauge is placed a few meters away from the ...

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  • A BASIC UNDERSTANDING OF THE MECHANICS OF …

    Secondary scale on hot strip and the impact on wear is another issue. Stresses from Hertzian pressure in 4-high cold mill back up rolls were measured years ago, the results were never published, but of high interest - also, maybe later. K. H. Schröder July 2003 K. H. Schröder: A BASIC UNDERSTANDING OF THE MECHANICS OF ROLLING MILL ROLLS

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  • Hot Rolling Mill Roll Eccentricity

    hot rolling mill roll eccentricity grinding mill equipment. hot rolling mill roll eccentricity Grinding Mill China Slab curvature compensation in a Hot Rolling Mill ... how to control eccentricity problem in hot rolling . Strip Thickness Control of Cold Rolling Mill with Roll ... 13 constraints can be a tedious and challenging problem in many ...

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  • Research on Mill Modulus Control of Strip Rolling AGC ...

    Control theories and models related to MMC were studied deeply in this paper. Its ability to eliminate strip thickness deviation, rolling force noise and roller eccentricity disturbances were simulated respectively based on different virtual mill modulus with MATLAB. As a result, how to get a better control …

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  • Technical Report UDC 621 . 771 . 25 Progress of Bar and ...

    rolling mills (8 stand roughing rolling mill, 4 stand intermediate rolling mill, and 4 stand finishing rolling mill) was built by Morgan-Sumitomo Heavy Machinery Co. Ltd.. In the 1980s, the aimed qual-ity of products was shifted toward high-value-added special steel quality, and, to achieve this, in 1986, a three-roll finishing rolling

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  • Process controller For rolling mills and processing lines

    Control and configuration software The control software and the configuration tool cover all ranges of rolling mill control functionality from sequential control to drives and technological controls like roll gap- or automatic gauge control. All functionality can be designed, tested and debugged in offline mode.

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  • how to control eccentricity problem in hot rolling mill

    Control of Roller Eccentricity Based on Phasic Compensation ,- how to control eccentricity problem in hot rolling mill ,, eccentricity filter used on 1 700 hot strip mill of Anshan Iron and Steel Group Corporation is presentedThe characteristics and advantages of control algorithm based on phasic compensation are analysedBy ,

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  • Online Eccentricity Monitoring of Seamless Tubes in Cross ...

    Wall-thickness eccentricity is a major dimensional deviation problem in seamless steel tube production. Although eccentricity is mainly caused by abnormal process conditions in the cross-roll piercing mill, most seamless tube plants lack the monitoring at the hot piercing stage but only inspect the quality of …

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  • hot rolling mill roll eccentricity - alloutpestcontrol.in

    how to control eccentricity problem in hot rolling mill. Roll Eccentricity Control for Strip Rolling… An in-depth review of the roll eccentricity control design problem is provided which encompasses a number of recent, novel, design contributions and includes experimental results from two separate steel, tandem cold rolling mill installations.

    Learn More
  • how to control eccentricity problem in hot rolling mill

    how to control eccentricity problem in hot rolling mill Roll Eccentricity Control for Strip Rolling… An in-depth review of the roll eccentricity control design problem is provided which encompasses a number of recent, novel, design contributions and includes experimental results from two separate steel, tandem cold rolling mill installations ...

    Learn More
  • Strip Thickness Control of Cold Rolling Mill with Roll ...

    Strip Thickness Control of Cold Rolling Mill with Roll Eccentricity Compensation by Using ... constraints can be a tedious and challenging problem in many control applications [2]. ... the high precision of strip thickness, various types of Automatic Gauge Control (AGC) methods have been developed for hot or cold mill processes. The Brit-ish ...

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