• دوشنبه تا شنبه: 10:00 - 16:00 / یکشنبه تعطیل است

| Primetals Technologies

Aluminum Hot Rolling Mill. Integrated Solenoid Valve (ISV) Spray System. ISV Roll coolant spray bars for hot and cold rolling mill strip flatness control. Coil Eccentricity Expert. Elimination of a known strip quality disturbance. EdgeMon. Inspection of side-trimmed strip edge surface for steel pickling and processing lines and aluminum rolling.

به خواندن ادامه دهید

Roll Eccentricity Control Using Identified Eccentricity of ...

Roll eccentricity is a periodic disturbance caused by a structure of back up rolls in rolling mills, and it affects product thickness accuracy. It cannot be measured directly by sensors, so it should be identified by measured thickness or measured roll force. When there is a large difference of diameters between top and bottom back up roll, the performance of roll eccentricity control using ...

به خواندن ادامه دهید

Rolling mill roll eccentricity control - Kaiser Aluminum ...

The invention relates to the control of rolling mill backup roll eccentricity by combining the load carrying characteristics of rolling mill tapered roller bearing assemblies during rolling with prescribed levels of axial thrust to effect a controlled deflection of backup roll necks on a 4-high rolling mill or the like due to the selected thrust force applied axially to the ends or necks of ...

به خواندن ادامه دهید

Rolling Mill Academy – Advanced Control Technology Training

Industrial Control Centre, University of Strathclyde: Prof. Mike Grimble has a long track record in fundamental contributions to optimal robust control and has over the years made significant contributions in Sendzimir mill modeling, backup-roll eccentricity control schemes, flatness control and recently robust multivariable control of hot mills.

به خواندن ادامه دهید

roll mill improvements - angeliquebrillet.fr

Rolling of Steel in a Modern Long Product Rolling Mill . Jun 19 2017 · In the long product rolling mills guide equipments guide the rolling stock at the entry and the exit of the roll pass so as to have smooth rolling of the rolling stock The guiding equipments are to be sturdy accurate and stable Rolling mill guide equipments play a major role in ensuring the surface quality of the rolled ...

به خواندن ادامه دهید

methods to control eccentricity in forged rolls

Jul 01, 1987· Awtm/ia Abstract: 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.

به خواندن ادامه دهید

Winner's Engineering Solutions | Rolling Mills

Comprehensive control scheme for the mill (FF: feedforward; FB: feedback; CEC: coil eccentricity compensation; MFC: mass flow control) 20-High Cold Rolling Mill. Feature Highlights of the 20-High Rolling Mill. 1. Wide range of thickness and width for different type of steel strips. Thickness: 0.05-1.2 mm; width: 50 - 1250 mm. Rolling Process Brief

به خواندن ادامه دهید

Active compensation of roll eccentricity in rolling mills ...

Abstract: This paper is concerned with the active compensation of the roll-eccentricity-induced periodic disturbances in the strip exit thickness of hot and cold rolling mills. The roll eccentricity may be caused by different reasons, e.g., inexact roll grinding or nonuniform thermal expansion of the rolls. The increasing demands on the thickness tolerances require new methods for the active ...

به خواندن ادامه دهید

C.-T. Li and C. S. G. Lee, "Neural Fuzzy Systems A Neuro ...

ABSTRACT: In rolling mill, the accuracy and quality of the strip exit thickness are very important factors. To realize high accuracy in the strip exit thickness, the Automatic Gauge Control (AGC) system is used. Because of roll eccentricity in backup rolls, the exit thickness deviates periodically.

به خواندن ادامه دهید

| Primetals Technologies

Taper work roll shifting for Tandem Cold Mill Coil Eccentricity Expert Elimination of a known strip quality disturbance TorqueMon Inline measurement of roll spindle torque for rolling mills Integrated Solenoid Valve (ISV) Spray System ISV Roll coolant spray bars for hot and cold rolling mill strip flatness control

به خواندن ادامه دهید

Rolling Mill Stand Controller – TelePro, Inc.

Rolling State The mill stand is ready for rolling. System Architecture. The hydraulic mill stand controller is a stand-alone system. The computing platform is the TelePro Tsentry product. It consists of an off-the-shelf Intel Pentium-class PC running the Windows 2003 Server operating system with VenturCom RTX real time extensions.

به خواندن ادامه دهید

Roll eccentricity compensation based on anti-aliasing ...

Roll eccentricity is an important factor causing thickness variations during hot strip rolling and might define the limit of strip thickness control accuracy. An improved multi-resolution wavelet transform algorithm was proposed to compensate for the roll eccentricity. The wavelet transform method had good localization characteristics in both the time and frequency domains for signal analysis ...

به خواندن ادامه دهید

Roll Eccentricity Control by Using a Bandpass Filter ...

Thickness deviations of the steel plates in the rolling mill process is mainly caused by the roll eccentricity of the back up roll (BUR). In this paper, a bandpass filter with high gain in the given frequency is introduced which is able to overcome the roll eccentricity of BUR and is very simple compared with other roll eccentricity control (REC) methods.

به خواندن ادامه دهید

CiteSeerX — ROLL ECCENTRICITY CONTROL WITH THE FORCE …

CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): The Force Feed Forward (FFF) System is the only hot strip mill AGC system in the world today which does not incorporate the BISRA principle for gage control. Instead, using a revolutionary control algorithm, FFF has proven in five installations in North and South America, that steelmakers need not replace their ...

به خواندن ادامه دهید

High-Quality Steel Rolling: Theory and Practice - Vladimir ...

High-Quality Steel Rolling. : Vladimir B. Ginzburg. CRC Press, Feb 23, 1993 - Technology & Engineering - 832 pages. 1 Review. Emphasizing solutions to the problems of achieving tight tolerances of important geometrical parameters such as thickness, width, cross-sectional profile, and flatness, this reference focuses on the principles and ...

به خواندن ادامه دهید

Method of measuring and compensating roll eccentricity of ...

an off-line eccentricity identification method which is performed when there is no plate rolling through the mill and with the top work roll and the bottom work roll in tight contact, said off-line eccentricity identification method determining the eccentricity values of N first points which equally divide a circumference of the top backup roll ...

به خواندن ادامه دهید

US4905491A - Unwind/rewind eccentricity control for ...

A method of rolling material in a rolling mill in which the material is directed from an unwind coil of the material to the mill and/or to a rewind coil of the material from the mill, the material being under tension as it is directed to and from the mill. The directing process has at least one cyclic disturbance which ordinarily causes cyclic changes in the tension of the material and in the ...

به خواندن ادامه دهید

Hot Rolling Mills Solutions | Nidec Industrial Solutions

ARTICS Hot Rolling Mills Real time control for Hot Rolling Mills. With more than 50 years of experience, Nidec Industrial Solutions has developed a vast array of functions based on auto-adaptive mathematical models that optimize rolling schedule calculations in real time.

به خواندن ادامه دهید

Modernization of a Tandem Cold Rolling Mill at Arcelor ...

Roll gap control Roll eccentricity compensation Direct tension control and coil eccentricity compensation Flatness control (skewing, bending, partial cooling) Mathematical process models and simulation An ABB in-house non-linear mathematical model was used for the pre-commissioning of the rolling mill. This consists of modular structures for 1- to

به خواندن ادامه دهید

A SURVEY OF THE LOOPER-TENSION CONTROL …

CONTROL TECHNOLOGY IN HOT ROLLING MILLS ... set–up mismatch, skid marks, roll eccentricity and so on. However, while the hydraulic screw down system makes it possible to give quicker response to the AGC, it often creates a disturbance to the tension control system because of the mass flow

به خواندن ادامه دهید

Strip Thickness Control of Cold Rolling Mill with Roll ...

Strip Thickness Control of Cold Rolling Mill with Roll Eccentricity Compensation by Using Fuzzy Neural Network Waleed I. Hameed, Khearia A. Mohamad Department of Electrical Engineering, University of Basrah, Basrah, Iraq . Email: [email protected] Received November 12, 2013; revised December 12, 2013; accepted December 19, 2013

به خواندن ادامه دهید

H∞ Control system for tandem cold mills with roll ...

In order to meet the requirement for higher thickness accuracy in cold rolling processes, it is strongly desired to have high performance in control units. To meet this requirement, we have considered an output regulating control system with a roll-eccentricity estimator for each rolling stand of tandem cold mills. Considering entry thickness variation as well as roll eccentricity as the major ...

به خواندن ادامه دهید

Rolling Mill Automation Training Course – TelePro, Inc.

Course Description. TelePro periodicallly offers a rolling mill automation technology training program at its offices in St. Charles, Illinois. The program is a detailed treatment of mill automation system design and practical, real-world implementation issues. Single-stand and tandem mill applications in both hot and cold rolling are covered.

به خواندن ادامه دهید

Roll Eccentricity Control for Strip Rolling Mills ...

Awtm/ia Abstract: 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. A unifying approach to eccentricity control ~nables the diverse range of published ...

به خواندن ادامه دهید

Advanced Reversing Cold Mills by Primetals Technologies ...

Rolling schedules can be carried out with an even or odd number of passes to maximize mill availability and performance. The Universal Crown Control mill (UCM mill) with work roll bending, intermediate roll bending, intermediate roll shifting and all straight roll application ensure enhanced flatness control.

به خواندن ادامه دهید

Strip Thickness Control of Cold Rolling Mill with Roll ...

Rolling mill is the core equipment in modern iron and steel industry, and the reliability of its mill roll system (MRS) is the key to ensure the rolling process with high precision, high speed ...

به خواندن ادامه دهید

Online Monitoring System Design for Roll Eccentricity in ...

Abstract: This paper deals with the parameter estimation and online monitoring of roll eccentricity in rolling mills. Roll-eccentricity-induced disturbances can result in strip thickness deviation and product quality degradation, and a conventional control strategy cannot regulate this kind of periodic disturbances due to its complex characteristics.

به خواندن ادامه دهید

Strip Thickness Control of Cold Rolling Mill with Roll ...

DOI: 10.4236/ENG.2014.61005 Corpus ID: 30768077. Strip Thickness Control of Cold Rolling Mill with Roll Eccentricity Compensation by Using Fuzzy Neural Network @article{Hameed2014StripTC, title={Strip Thickness Control of Cold Rolling Mill with Roll Eccentricity Compensation by Using Fuzzy Neural Network}, author={W. I. Hameed and K. Mohamad}, journal={Engineering}, …

به خواندن ادامه دهید

Technological control for cold rolling processes ...

The basic control strategy is thickness feedback (monitor control) based on the measured thickness deviation at the exit side of the mill. The delay time, transport of the strip from the roll gap to the thickness gauge, essentially determines the control system's dynamic response, particular at a low rolling speed.

به خواندن ادامه دهید

(PDF) Application of Repetitive Control to Eccentricity ...

Single Stand Work roll diameter 17 in. Conclusions Backup roll diameter 55 in. Distance of thickness sensor from Repetitive control has been applied to compensate for roll eccentricity disturbances on the gauge in the cold roll bite exit 3 ft. Schedule data; rolling process.

به خواندن ادامه دهید