Abstract Considers some of the distributed aspects of the control of modern metal rolling mills. Such mills have a range of ever more ambitious targets, for example product quality, yield, metallurgy and throughput. These aims are supported by high levels of mill sophistication, in terms of plant equipment, instrumentation, actuators and control hardware.
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 compensation and other disturbances during the rolling process are compensated and a rolling speed dependent, adaptive PI controller is developed to accomplish fine thickness control.
1974-1-22ensp0183enspA rolling mill and associated control system are described, including means for adjusting roll spacing of the mill to keep the exit gage of rolled strip substantially constant as the mill is accelerated to normal operating speed the adjusting means being operable selectively over a range of mill speeds to cause roll spacing adjustments in relation to subsequent changes in mill speed.
1973-10-23ensp0183enspRolling mill controls generally are concerned with effecting a change in the roll setting as a function of a change in the rolling pressure. Prior patents that, at least in part, envision such a control are U. S. Pat. No. 2,726,541 that issued to R. B. Sims on Dec. 13, 1955 and No. 3,496,743 that issued to M. D. Stone on Feb. 24, 1970.
2012-11-7ensp0183ensp149Rolling mill automation control system RACS AICs rolling mill automation control system longproduct mills speedreference generation rollingstands, rolling tension control, looper control materialcontinuity control, aiming improvedmill performance .
2006-9-30ensp0183ensp3.1 Key Feature of Process Control Detection of Periodic Defects Rolls and rollers are the most heavily used parts of a rolling mill. Due to wear from contacting hot material with great force, their lifetime is limited. Although rolls are refurbished in the roll shop regularly, they occasionally crack before the end of the usual production cycle.
The mill stretch compensation and other disturbances during the rolling process are compensated and a rolling speed dependent, adaptive PI controller is developed to accomplish fine thickness control.
2010-1-27ensp0183enspMODELLING AND CONTROL OF A HOT ROLLING MILL 2547 MODELLING AND CONTROL OF A HOT ROLLING MILL.
2015-6-2ensp0183enspJ. Cent. South Univ. 2015 22 21832191 DOI 10.
2015-11-4ensp0183enspP. Kucsera et al. Hot Rolling Mill HGC Thickness Control Improvement 98 Another way to determine the thermal expansion of the work roll is the modelling of the heat transfer between the work rolls and the strip.
Precise temperature control and uniform heating with state-of-the-art heating furnaces 2. High rigidity by using large-sized rolling mills 3. Design and control of pass schedule specifically for precision rolling 4. Improvement of size precision by using a tensionless rolling mill system 5.
According to the Hill rolling force formula, taking particular account of the influence from horizontal vibration of rolled piece in roll gap, a dynamic rolling force model is analyzed. Considering the interaction between vibration of strip and roll, the dynamic vibration model of rolling mill is established.
2007-7-1ensp0183enspThe control law is based on tension estimation by using mill motor torque and rolling force etc. and manipulates the speed of an upstream main motor.
2018-5-9ensp0183ensp2 Ghost rolling using tandem cold rolling mills TCM process model as real-time simulator Simulation TCM Process Exploiting the full production poten-tial requires an overall and well-inte-grated approach to cold rolling mill automation, optimization, control, adaptation and supervision.
Metallurgy of Rolling mill Rolls. Rolls are implements or tools used in rolling mills to reduce the cross section of the material being rolled. They are highly stressed tools and are subject to wear. They are needed both for the rolling of sectional as well as flat products.
Automatic rolling process is a high-speed system which always requires high-speed control and communication capabilities. Meanwhile, it is also a typical complex electromechanical system distributed control has become the mainstream of computer control system for rolling mill.
2013-11-12ensp0183enspdescription of the cold rolling process is presented. In Section 3, a mathematical model has been driven for sin-gle-stand cold rolling mill. In Section 4, architecture and learning algorithm Fuzzy Neural Networkof have been presented. In Section 5, thickness control with roll ec-centricity compensation has been proposed.
Tandem Cold Metal Rolling Mill Control also will be useful to academics and graduate students interested in advanced automatic control and its practical application and in the uses of the state-dependent Riccati equation in particular. About the Author.
2020-8-22ensp0183enspFrom the series Simulating a Multi-Stage Rolling Mill Process Alec Stothert, MathWorks 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.
Electrical control of vertical mill. Electrical system for coal mill. Electrical control system for double-inlet and dou. Large-Scale Casting amp Forging Parts Forging. Casting. Automobile Parts amp Components Steering column amp drive shaft assembly. Automobile combination switch brief introduction ... Wheel Hub Rolling mill .
2019-8-9ensp0183enspThe automatic thickness control system on the rolling mill is operated strictly in accordance with the rolling mill operating process and operating methods. The gearbox should be cleaned at least once a quarter.
Higher control accuracy in hot rolling mill due to direct encoder attachment. Back . To improve control accuracy and, as a consequence, the quality of the material the customer desires a directly mounted, compact solution without a downstream transfer gearbox gear backlash.
2020-10-15ensp0183enspThe two common forms of rolling mill vibration that are most difficult to solve are third octave gauge chatter and fifth octave chatter. Both can cause significant strip quality issues if they occur on a mill. There is always a source of vibration responsible for fifth octave chatter so a solution can usually be found to this type of problem.
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The ASRA project is the first to develop a radar method for contour measurement of the edge of the rolling stock in the roughing stand of a hot rolling mill.
Abstract In the rolling mill main drive system, a shaft torsional vibration is often generated when a motor and a roll are connected with a flexible shaft. The state feedback control can effective suppress the torsional vibration of the main drive system of rolling mill.
2017-2-1ensp0183ensprolling simulation and results were compared with experimental results from the roughing mill with conventional control structure. The result from the test demonstrated reliability of the proposal. Keywords wire rod rolling, tension control, rolling torque, fuzzy control 1.
X-Pact 174 Mill Stand Control TCS Aluminium Rolling Plants, Technology and Services Download. Contact. Ralf Ohrndorf. SMS group GmbH Technical Sales Aluminium Wiesenstra223e 30 57271 Hilchenbach-Dahlbruch Germany Phone 49 2733 29 1620 Fax 49 2733 29 771620.
2020-10-15ensp0183enspMass flow control additionally addresses problems in the transport lag between the mill bite and the exit thickness measurement and so maintains good control during speed changes. Attention to detail and good practise during aluminium rolling prevents too many new frequencies being introduced in the current pass.
articleosti4002234, title CONTROL FOR ROLLING MILL, author Shuck, A B and Shaw, W C, abstractNote A plutonium-rolling apparatus is patented that has two sets of feed rolls, shaping rolls between the feed rolls, and grippers beyond the feed rolls, which ready a workpiece for a new pass through the shaping rolls by angularly shifting the workpiece about its axis or transversely .
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E.R. Ramanaidou, M.A. Wells, in Treatise on Geochemistry Second Edition, 2014. 13.13.5 Summary. Iron ore and its final product, steel, are arguably the most historically social and economically significant commodity of the last three millennia.
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