hot rolling mill roll eccentricity

Hot

K Series Mobile Crushing plant

Better Mining Mobile Crusher applied construction industry, marble mining plant

Hot

K Series Mobile Crushing plant

K Mobile Crusher also known as mobile crushing station, developed based on years of independent research and manufacturing experience of mobile crushers. K Series Mobile Crushing plant as it is also called, is often used as a primary crusher in a mult

Hot

NK series mobile crusher

NK series mobile crushing plant is new generation of mobile crushing station equipped with intelligent control system. NK series mobile crusher is composed of the frame assembly, automobile components, hosts accessory equipment, power system and hydra

Hot

Crawler Mobile Crusher

Compared with fixed production lines, this Crawler Mobile Crusher have a shorter engineering period and rapider transition, which not only reduces the investment risk and opportunity cost of the investors, but also avoids the demolition and constructi

Hot

Mobile Primary Jaw Crusher

Mobile Primary Jaw Crusher’s adaption of ship form structure lowers the chassis; reduce the weight and volume of the plant; and makes it easy for turning and transportation;Hydraulic-drive feeding plate is convenient and reliable.

Hot

C6X Series Jaw Crusher

C6X Jaw Crusher on structure and production efficiency present advanced modern technologies. Our Company's C6X Jaw Crusher can solve such problems of the existing jaw crushers as low production efficiency, difficult installation and maintenance. At pr

Hot

HGT Hydraulic Gyratory Crusher

HGT Gyratory Crusher is a new-type intelligent coarse crusher with big capacity and high efficiency. It integrates mechanical, hydraulic, electric, automated, and intelligent controlling technologies which grant it with advantages traditional crushing

Hot

HST Hydraulic Cone Crusher

HST Single Cylinder Hydraulic Cone Crusher is a new high-efficiency cone crusher independently researched, developed and designed by through summarizing over twenty years of experience and widely absorbing advanced American and German technologies

Hot

CI5X Series Impact Crusher

CI5X Impact Crusher breaks materials with impact force. When materials enter the working area of hammer, they may be crushed under the high-speed shock and then thrown onto the impact device above the rotor for another crushing. Next, materials bounce

Hot

VUS aggregate optimization system

The VU system is a global most-advanced dry-process sand-making system. The system is constructed like a tower. Its fully-enclosed layout features high integration. It integrates the functions of high-efficiency sand making, particle shape optimizatio

Hot

MTW-Z European Trapezium Mill

MTW European Grinding Mill is innovatively designed through deep research on grinding mills and development experience. It absorbs the latest European powder grinding technology and concept, and combines the suggestions of 9158 customers on grinding m

Hot

5X Series Roller Grinding Mill

Grinding roller of MB5X Pendulum Roller Grinding Mill l adopts diluted oil lubrication. It is a technology initiated domestically which is maintenance-free and easy to operate. Diluted oil lubrication is oil bath lubrication, more convenient than grea

Hot

LM Vertical Mill

LM Vertical Grinding Mill integrates crushing, drying, grinding, separating and transport. The structure is simple while the layout is compact. Its occupational area is about 50% of that of the ball-milling system. The LM grinding mill can also be arr

Hot

TGM Trapezium Mill

TGM Super Pressure Trapezium Mill The operation principle of main unit of Trapezium mill is that main unit runs with the central shaft that is driven by a gear box. The top of the shaft is connected with a quincunx stand on which a grinding roller is

Hot

Raymond Mill

The operation principle of main unit of Trapezium mill is that main unit runs with the central shaft that is driven by a gear box. The top of the shaft is connected with a quincunx stand on which a grinding roller is installed to form a swing support.

hot rolling mill roll eccentricity

2020-04-30T09:04:23+00:00
  • Roll Eccentricity Control for Strip Rolling Mills ...

    1987-07-01  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 enables the diverse range of published design solutions to be compared. The key conclusion from this comparison is the mathematical equivalence of eccentricity

  • Cited by: 12
  • hot rolling mill roll eccentricity - joerg-steinbach-preis.de

    Roll Crusher. Feeding Size: ≤25-≤100mm. Production Capacity: 5-100t/h. Applied Materials: River gravel, iron ore, limestone, quartz, granite and other medium or hard ores and rocks. Details; Fine Crusher. Feeding Size: Less than 190mm. Discharging Size: 5-10mm. Production Capacity: 12-1000TPH. Details; Coal Briquetting Machine. Power: 7.5-30kw. Capacity: 2-30TPH

  • ROLL ECCENTRICITY COMPENSATION (REC)

    Rolls in rolling mills are never completely round but have eccentricity which can be caused by: • grinding inaccuracy • non-uniform thermal expansion • asymmetrical adjustment of bearing rolls shell via drive keys Each eccentricity consists of a base frequency which is the rotary frequency of the roll and several harmonic frequencies. Every roll of each roll stack can show such

  • hot rolling mill roll eccentricity

    Active compensation of roll eccentricity in rolling 2002-8-6 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 See More

  • Active compensation of roll eccentricity in rolling mills ...

    This paper is concerned with the active compensation of the roll eccentricity-induced periodic disturbances in the strip exit thickness of hot and cold rol Active compensation of roll eccentricity in rolling mills - IEEE Conference Publication

  • how to control eccentricity problem in hot rolling mill

    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 like e.g. inexact roll grinding or nonuniform thermal expansion of the rolls.

  • Neural network for identification of roll eccentricity in ...

    1996-06-15  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. This paper should present a solution for identifying roll eccentricity

  • Cited by: 20
  • equipment rolling mill roll eccentricity ntrol

    rolling is classified according to the temperature of the metal rolled. in a broader sense, a rolling mill is an automatic system or line of machines that performs both wherein rotation of the eccentric mountings will move the back-up bearings toward and temperature control by heating or cooling the rolls

  • (PDF) Hot rolling mill hydraulic gap control (HGC ...

    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 ...

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

    2013-11-12  Roll eccentricities are caused by axial deviations between the roll barrel and the roll necks due to irregularities in the mill rolls and/or roll bearings. These irregularities cause cyclic deviations in the strip thickness at the output of a mill stand. Figure 3 depicts the effects of eccentricity on the output strip thickness.

  • File Size: 733KB
  • Neural network for identification of roll eccentricity in ...

    1996-06-15  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. This paper should present a solution for ...

  • Active compensation of roll eccentricity in rolling mills ...

    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 ...

  • hot rolling mill roll eccentricity

    Active compensation of roll eccentricity in rolling 2002-8-6 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 See More

  • how to control eccentricity problem in hot rolling mill

    Active compensation of roll eccentricity in rolling mills . 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 . Get Price ; how to control eccentricity problem in hot rolling mill. Neural network for identifiion of roll eccentricity in The roll ...

  • Active compensation of roll eccentricity in rolling mills ...

    This paper is concerned with the active compensation of the roll eccentricity-induced periodic disturbances in the strip exit thickness of hot and cold rol Active compensation of roll eccentricity in rolling mills - IEEE Conference Publication

  • 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. In this paper, we design PI controller in outer loop for ...

  • US3893317A - Eccentricity correction in a rolling mill ...

    In a method of operating a rolling mill there is a measurement stage in which the rolls are rotated under load with the roll gap reduced to zero for a period of time equal to at least one beat cycle of the operative rolls (the work rolls in a two high mill and the back-up rolls in a four high mill) and a signal representative of the sum of the eccentricities of these rolls, and signals ...

  • Reducing thickness variation of hot rolled steel strip by ...

    Reducing thickness variation of hot rolled steel strip by non-circular back-up roll geometry T. Widmaier*1, T. Salmela1, P. Kuosmanen1, J. Juhanko1,P.Ka¨rha2 and J. Uusima¨ki1 Typically, back-up rolls in hot strip mills are equipped with sliding bearings and it is common to use a key that prevents relative motion between the conical sleeve and the roll shaft. The key groove causes ...

  • Non-circular grinding of backup rolls to reduce rolling ...

    A common structure in hot strip mill backup roll bearings is to attach the conical sleeve of the slide bearing to the roll’s shaft by a key. The key groove, cut to the conical sleeve, locally causes deformation under load. This sleeve spring is observed as rolling force variation. A new method to minimize force variations, based on 3D grinding of the backup rolls, was developed. A non ...

  • Main Features of a modern Hot Strip Mill – IspatGuru

    2013-12-22  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. When there is a large difference of diameters between top and bottom back up roll, the performance

  • Active compensation of roll eccentricity in rolling mills ...

    This paper is concerned with the active compensation of the roll-eccentricity-induced periodic disturbances in the strip exit thickness of hot and cold rol Active compensation of roll eccentricity in rolling mills - IEEE Journals Magazine

  • 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. In this paper, we design PI controller in outer loop for the strip exit thickness while PD controller is ...

  • Rolling (metalworking) - Wikipedia

    Slabs are the feed material for hot strip mills or plate mills and blooms are rolled to billets in a billet mill or large sections in a structural mill. The output from a strip mill is coiled and, subsequently, used as the feed for a cold rolling mill or used directly by fabricators. Billets, for re-rolling, are subsequently rolled in either a merchant, bar or rod mill. Merchant or bar mills ...

  • US3893317A - Eccentricity correction in a rolling mill ...

    In a method of operating a rolling mill there is a measurement stage in which the rolls are rotated under load with the roll gap reduced to zero for a period of time equal to at least one beat cycle of the operative rolls (the work rolls in a two high mill and the back-up rolls in a four high mill) and a signal representative of the sum of the eccentricities of these rolls, and signals ...

  • Multi-resolution wavelet method for roll eccentricity ...

    In order to compensate the roll eccentricity in hot strip rolling process, a multi-resolution wavelet transform method was proposed. This wavelet method has quiet good localization characteristic in both time domain and frequency domain. To eliminate frequency aliases inhered in Mallat algorithm, an anti-aliasing algorithm combining fast Fourier transform (FFT) and inverse fast Fourier ...

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

    OSTI.GOV Journal Article: A novel real-time fuzzy-based diagnostic system of roll eccentricity influence in finishing hot strip mills. A novel real-time fuzzy-based diagnostic system of roll eccentricity influence in finishing hot strip mills. Full Record; Other Related Research; Abstract ...

  • METALS Improving quality and cost-efficiency in cold ...

    • Roll eccentricity control • Tension feed-forward control Thickness feedback control The basic control strategy is thickness feedback (monitor control) based on the measured thick - ness deviation at the exit side of the mill. The delay time, transport of the strip from the roll gap to the thickness gauge, essentially deter - mines the control system’s dynamic response, particular at ...

  • Reducing thickness variation of hot rolled steel strip by ...

    Reducing thickness variation of hot rolled steel strip by non-circular back-up roll geometry T. Widmaier*1, T. Salmela1, P. Kuosmanen1, J. Juhanko1,P.Ka¨rha2 and J. Uusima¨ki1 Typically, back-up rolls in hot strip mills are equipped with sliding bearings and it is common to use a key that prevents relative motion between the conical sleeve and the roll shaft. The key groove causes ...

  • DE4411313A1 - Method for filtering out the influence of ...

    A method is to be specified for constructing a correction signal (fe), with which the eccentricity of rolls (1, 2) in continuous operation is to be controlled out, from a rolling force signal (fw) determined on the roll stand between the two rolls (1, 2), the method to be carried out at low cost and without angle sensors being necessary on the rolls (1, 2).

  • Advanced Reversing Cold Mills by Primetals Technologies

    Depending on the product mix, a single-stand cold rolling mill can deliver rolling capacities of 100,000 to 400,000 t/a. 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 ...

  • 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. In this paper, we design PI controller in outer loop for the strip exit thickness while PD controller is ...

  • US3893317A - Eccentricity correction in a rolling mill ...

    In a method of operating a rolling mill there is a measurement stage in which the rolls are rotated under load with the roll gap reduced to zero for a period of time equal to at least one beat cycle of the operative rolls (the work rolls in a two high mill and the back-up rolls in a four high mill) and a signal representative of the sum of the eccentricities of these rolls, and signals ...

  • hot rolling mill roll eccentricity - stonecrushingmachine

    Hot Rolling Mill Roll Eccentricity - Crusher USA rollmill industries ltd. we roll mill industries ltd is considered as a leading manufacturer and exporter of hot steel rolling plants. the company Chat Now; Active compensation of roll eccentricity in rolling mills - IEEE This paper is concerned with the active compensation of the roll eccentricity-induced periodic disturbances in the strip ...

  • Multi-resolution wavelet method for roll eccentricity ...

    In order to compensate the roll eccentricity in hot strip rolling process, a multi-resolution wavelet transform method was proposed. This wavelet method has quiet good localization characteristic in both time domain and frequency domain. To eliminate frequency aliases inhered in Mallat algorithm, an anti-aliasing algorithm combining fast Fourier transform (FFT) and inverse fast Fourier ...

  • 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 ...

  • Rolling of steel in Hot Strip Mill – IspatGuru

    2015-12-03  The technologies incorporated in a modern hot strip mill to in improve the product quality are (i) automatic gauge control, (ii) automatic width control, (iii) work roll bending, (iv) continuous varying crown (CVC) , (and v) roll eccentricity compensation. CVC is a way to change the strip profile by using rolls with a profile. The gap between the rolls can be changed by axial shifting of the ...

  • FAULT DIAGNOSIS OF ROLL SHAPE UNDER THE SPEED CHANGE

    Fig. 1. Roll radius variation with angular velocity change Fig. 2. FFT result of a rolling force 3. MATHEMATICAL MODELS Fig.3 shows a hot rolling process in which the strip thickness is reduced from hi−1 to hi. The rolling force can be represented as the following Eqn (1) in hot rolling process (The Iron and Steel Institute of Japan, 1991).

  • Online Automatic Gauge Controller Tuning Method by using ...

    Hot Rolling Plant Sunghoo Choi ... To make a hot rolled coil, a roughing mill and flnish-ing mill are used. Slabs are rolled roughly in the roughing mill because they are hard to be rolled to a required thickness at one time. And then the strip passes through the flnish- ing mill. At this time, an Automatic Gauge Control(AGC) system plays an important role in making an accurate sized hot ...

  • Advanced Reversing Cold Mills by Primetals Technologies

    Depending on the product mix, a single-stand cold rolling mill can deliver rolling capacities of 100,000 to 400,000 t/a. 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 ...

  • A non-circular turning system to minimize roll geometry errors

    The running speeds in hot rolling mill can be even 15 m/s. Those coexistent claims set new demands to the acceptable force variation level in the milling roll stands. Research problem. The rolling assembly or roller unit consists of a set of rollers and its support structures. A rolling mill comprises a number of units complemented by various control devices and drive units. There are usually ...