hot rolling mill roll eccentricity

hot rolling mill roll eccentricity

Roll Eccentricity Control for Strip Rolling Mills ...

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. A unifying approach to eccentricity control ~nables the diverse range of published ...

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Endless Rolling Mills from the Market Pioneers

Roll Eccentricity Expert Elimination of a known strip thickness quality disturbance from rolls TorqueMon Inline measurement of roll spindle torque for rolling mills ShapeMon Camber and centerline measurement for hot mill, plate mill, slab caster, billet caster

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

P. 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

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The Complete Technology Book on Hot Rolling of Steel

Hot rolling mill thus helps in reducing the size of a metal thereby molding it into the desired form and shape. Rolling mills perform the function to reform the metal pieces such as billet and ingot whilst maintaining its well equipped micro structure into bar, wire, sheet, strip, and plate. Hot rolled products are frequently categorized

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Method of measuring and compensating roll eccentricity of ...

A rolled plate with uniform thickness and flatness from a rolling mill is a goal constantly pursued by many steel plate manufacturers. Among the various factors which affect the thickness and flatness of the rolling plate, eccentricity of the backup roll is most decisive.

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Efficient Special Steel Mills from Primetals Technologies

The ZR mill is a mill for cold rolling of hot-rolled coils of stainless steel and other hard materials to the designated product thickness and strip shape accuracy. The ultra-small diameter rolls are firmly supported in a 20Hi roll cluster arrangement. ... Roll Eccentricity Expert for

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

Roll eccentricity is not part of the controller but must be considered to be consistent with data reported from operating mills which . Figure 3. Effects of roll eccentricity on output strip thick- ness. usually includes its effects. The eccentricity components remaining in the mill exit thickness after compensation.

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Loop monitoring and assessment of hot strip mill control

casted steel slabs and rolled in two stands down to desired thickness. The first stand is a conventional roughing mill. The last stand is a steckel mill. It is a special rolling technique that is only used in a small number of hot strip mills in the world. When this special technique is used, the demand on the control is

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GENERAL ASPECTS OF ROLL COOLING FOR HOT COLD

rolling mill, dedicated roll cooling systems are required to fulfill the required functions. Examples are suitable roll cooling and lubricationsystems to fully utilize the advantages of HSS rolls in hot strip mills, and selective roll cooling systems as a method to control the flatness of the strip in cold rolling mills.

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NEW ROLL GRADE AND TECHNOLOGY CONCEPT IS BORN

Davy Roll Company, supplying cast roll products for more than 150 years. In 1999, Union Electric Steel purchased the company and changed the name to Union Electric Steel UK Limited (UES UK). Today, UES UK continues the legacy of producing high-quality cast rolls for hot and cold strip mills, medium-to-heavy section mills, and plate mills ...

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A novel real-time fuzzy-based diagnostic system of roll ...

1342 IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS, VOL. 34, NO. 6, NOVEMBER/DECEMBER 1998 A Novel Real-Time Fuzzy-Based Diagnostic System of Roll Eccentricity Influence in Finishing Hot Strip Mills Daniel F. Garc´ıa, Jos´e M. L´opez, Francisco J. Su´arez, Javier Garc´ıa, Faustino Obeso, and Juan A. Gonz´alez Abstract—This paper proposes a method for the

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Endless Rolling Mills from the Market Pioneers

Roll Eccentricity Expert Elimination of a known strip thickness quality disturbance from rolls TorqueMon Inline measurement of roll spindle torque for rolling mills ShapeMon Camber and centerline measurement for hot mill, plate mill, slab caster, billet caster

Read More
The Complete Technology Book on Hot Rolling of Steel

Hot rolling mill thus helps in reducing the size of a metal thereby molding it into the desired form and shape. Rolling mills perform the function to reform the metal pieces such as billet and ingot whilst maintaining its well equipped micro structure into bar, wire, sheet, strip, and plate. Hot rolled products are frequently categorized

Read More
Efficient Special Steel Mills from Primetals Technologies

The ZR mill is a mill for cold rolling of hot-rolled coils of stainless steel and other hard materials to the designated product thickness and strip shape accuracy. The ultra-small diameter rolls are firmly supported in a 20Hi roll cluster arrangement. ... Roll Eccentricity Expert for

Read More
Strip Mills – AR GROUP OF INDUSTRIES

Roll eccentricity compensation. 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.

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ROLL SPEED SET-UP IN HOT STRIP FINISHING ROLLING MILL ...

Jan 01, 2007  Hot strip finishing mill is initially set up with rolling conditions such as roll speed, roll gap, and cooling pattern obtained by a set-up model. To improve the accuracy of initial roll speed setting for a 7–stand finishing mill, an equation for predicting forward slip and a compensation method for initial roll speed setting were proposed ...

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Method of measuring and compensating roll eccentricity of ...

A rolled plate with uniform thickness and flatness from a rolling mill is a goal constantly pursued by many steel plate manufacturers. Among the various factors which affect the thickness and flatness of the rolling plate, eccentricity of the backup roll is most decisive.

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

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.

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GENERAL ASPECTS OF ROLL COOLING FOR HOT COLD

rolling mill, dedicated roll cooling systems are required to fulfill the required functions. Examples are suitable roll cooling and lubricationsystems to fully utilize the advantages of HSS rolls in hot strip mills, and selective roll cooling systems as a method to control the flatness of the strip in cold rolling mills.

Read More
Loop monitoring and assessment of hot strip mill control

casted steel slabs and rolled in two stands down to desired thickness. The first stand is a conventional roughing mill. The last stand is a steckel mill. It is a special rolling technique that is only used in a small number of hot strip mills in the world. When this special technique is used, the demand on the control is

Read More
FAULT DIAGNOSIS OF ROLL SHAPE UNDER THE SPEED

find both eccentricity magnitude and eccentricity location in the roll as shown in Fig.10. But, as shown in Fig.12, not only magnitude of eccentricity but also location of eccentricity in the roll is obtained. 4.2 Simulations with Field Data Fig.13 shows a simplified multi-stand hot rolling system. The rolling system consists of seven stands.

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A novel real-time fuzzy-based diagnostic system of roll ...

INTRODUCTIONG IVEN A SET OF thickness defects measured in a rolled strip at the exit of a finishing hot strip mill (FHSM), the problem is to diagnose the following: 1) whether defects come from roll eccentricity; 2) for a defect caused by roll eccentricity, which roll or rolls produced it.

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Technological packages › Flat › HAGC ‹ Danieli

Hydraulic automatic gauge control. BENEFITS. Fast-response thickness control. High-accuracy gap positioning. Smaller thickness tolerances and faster thickness correction. Reliability and easy maintenance design. Back-up roll eccentricity compensation. Outstanding accuracy and dynamic response. Dramatic reduction of off-gauge transients.

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

hot-rolled coils, thereby effecting pass cutting in the cold-rolling process. 3) To realize a high-productivity hot-rolling mill by replac-ing the computer control system with one of the latest design that achieved a significant degree of automa-tion. The expansion of the hot finisher to 4 stands, which was

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Neural network for identification of roll eccentricity in ...

Jun 15, 1996  The roll eccentricity in a rolling mill may define the limit of achievable thickness tolerances and thus is subject of interest for the automation equipment in hot rolling mills as well as in cold rolling mills. Today's demand on thickness tolerances less than 0.8% require efficient methods for roll eccentricity identification and compensation.

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A novel real-time fuzzy-based diagnostic system of roll ...

1342 IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS, VOL. 34, NO. 6, NOVEMBER/DECEMBER 1998 A Novel Real-Time Fuzzy-Based Diagnostic System of Roll Eccentricity Influence in Finishing Hot Strip Mills Daniel F. Garc´ıa, Jos´e M. L´opez, Francisco J. Su´arez, Javier Garc´ıa, Faustino Obeso, and Juan A. Gonz´alez Abstract—This paper proposes a method for the

Read More
FAULT DIAGNOSIS OF ROLL SHAPE UNDER THE SPEED

find both eccentricity magnitude and eccentricity location in the roll as shown in Fig.10. But, as shown in Fig.12, not only magnitude of eccentricity but also location of eccentricity in the roll is obtained. 4.2 Simulations with Field Data Fig.13 shows a simplified multi-stand hot rolling system. The rolling system consists of seven stands.

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Online Eccentricity Monitoring Weihong Guo of Seamless ...

Online Eccentricity Monitoring of Seamless Tubes in Cross-Roll Piercing Mill 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

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Main Features of a modern Hot Strip Mill – IspatGuru

Dec 22, 2013  Fig 2 work roll bending and continuous varying crown. Roll eccentricity compensation – 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.

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Strip Mills – AR GROUP OF INDUSTRIES

Roll eccentricity compensation. 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.

Read More
[PDF] Hot Rolling Mill Hydraulic Gap Control ( HGC ...

Jun 06, 2015  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. The improved system has been validated by measurements. Future improvement options are also analyzed, like eccentricity compensation, and

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

hot-rolled coils, thereby effecting pass cutting in the cold-rolling process. 3) To realize a high-productivity hot-rolling mill by replac-ing the computer control system with one of the latest design that achieved a significant degree of automa-tion. The expansion of the hot finisher to 4 stands, which was

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Dave Knapp – TelePro, Inc.

An encoderless roll eccentricity compensation system for rolling mills and sheet casters; Shop floor inventory and production tracking systems for hot rolled plate and coiled products and for sheet finishing operations; A standard hydraulic mill stand control product for rolling mills

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Steel Rolling Mill Machine: Hot Rolling Roll

Apr 13, 2021  0.7 ~ 0.80.4 1.8 1.8 0.5 mo0.35 for the outer layer of the backup roll of gangdemen hot rolling mill in West Germany. Hot rolling backup roll core 0.250.40.4. 0.8 ~ 0.9 1.6 ~ 1.7 for the outer layer of the backup roll of hot rolling in challans roll mill, France. 0.8 0.6 1.6 ~ 2.0 1.6 ~ 2.0 Mo 0.3 ~ 0.4. 1.5 ~ 2.0 for the outer ...

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US4126027A - Method and apparatus for eccentricity ...

A method and apparatus is disclosed for eccentricity correction in a rolling mill, in which prior to rolling, the eccentricity of the back-up rolls is measured and recorded both initially and each time the back-up rolls are changed. In an analog loop, constant roll gap is maintained by bidirectionally displacing the back-up rolls so as to maintain constant roll force in accordance with a ...

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Technological packages › Flat › HAGC ‹ Danieli

Hydraulic automatic gauge control. BENEFITS. Fast-response thickness control. High-accuracy gap positioning. Smaller thickness tolerances and faster thickness correction. Reliability and easy maintenance design. Back-up roll eccentricity compensation. Outstanding accuracy and dynamic response. Dramatic reduction of off-gauge transients.

Read More
US6378346B1 - Steckel hot rolling mill - Google Patents

The invention relates to a Steckel hot rolling mill comprising at least one reversing roll stand ( 1 ) as well as coilers ( 6,7 ) which are positioned upstream and downstream and present torque-controlled drives. The aim of the invention is to improve such a hot rolling mill in such a way that it optimally counteracts variations in tension and/or mass flow caused by changes in process ...

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Top PDF hot rolling mill process - 1Library

Because the dimensions of existing hot-rolled T-bars are unsuitable, T-bars fabricated by welding two plates are cur- rently used in shipbuilding. To manufacture slim T-bars by hot rolling, we devised a new T-bar rolling process using two universal mills and an edging mill. The two universal mills have different roll

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