rolling mills eccentricity

Roll Eccentricity Control for Strip Rolling Mills ...

Jul 01, 1987 · SIMULATION RESULTS In eccentricity control, the following practical considerations apply to production rolling mills and thus should be cons idered in the des ign of relevant simulation studies: • the incoming feed can introduce periodic disturbances in the form of hot rolled thickness disturbances or uncoiler induced tension fluctuations ...

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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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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 ...

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Online Monitoring System Design for Roll Eccentricity in ...

Jun 05, 2015 · 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.

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A roll eccentricity sensor for steel-strip rolling mills ...

A roll eccentricity sensor for steel-strip rolling mills. Abstract: The problem of roll eccentricity compensation in steel-strip rolling mills is examined. A novel roll eccentricity sensor is proposed for the task of retrieving the desired reference signal from the available roll-force measurement. The sensor implements a modified comb filter ...

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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 ...

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Online Monitoring System Design for Roll Eccentricity in ...

Jun 05, 2015 · 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.

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

Nov 12, 2013 · 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

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The Complete Technology Book on Hot Rolling of Steel

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. ... Roll Eccentricity Control Methods Passive roll eccentricity control methods Active roll eccentricity control methods Preventive roll eccentricity control methods

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Technological control for cold rolling processes

Roll eccentricity control Irregularities in roll geometry cause periodic varia-tions in the roll gap, which can lead to variations in ... of materials and types of rolling mills: Break down mills Multi-roll mills Two-stand mills DCR mills Tandem mills Temper mills Foil mills Superimposed strategies and solutions are avail-

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Shape Control in Cluster Mills - Rolling Mill Technology ...

Mills rolling carbon steels can be classified in two groups. One group rolls high-carbon steel in narrow widths for saw blades and measuring tapes. The other group includes medium-carbon . ... and "D" had to have smaller eccentricity, as the load on those shafts was higher and the racks had

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IMS Measuring Systemes in Tube Rolling Mills

IMS measuring systems for typical measuring tasks in Tube Rolling Mills such as Wall Thickness, Diameter, Eccentricity, Straightness, Surface Inspection and more

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Products › Flat › Cold Rolling Mills Lower investment for ...

Cold Rolling Mills Lower investment for high-quality plants. 32/115. Automobiles and shipbuilding, aircraft and spacecraft technology, medical machines, architecture and household appliances - the application fields for high-quality steel strip seem almost unlimited. ... Automatic eccentricity compensation. Cross products. Plant maintenance and ...

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Table 1 from Strip Thickness Control of Cold Rolling Mill ...

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},

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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 ...

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US4222254A - Gauge control using estimate of roll ...

A method of controlling a rolling mill in which eccentricity of the roll assemblies of the mill and variations in the thickness and/or hardness of material entering the mill ordinarily adversely affect the gauge of the material leaving the mill. The method involves the steps of slowly eliminating the cyclic effects of roll eccentricity on the exit gauge of the material while simultaneously ...

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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 ...

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LQG Regulation: Rolling Mill Case Study - MATLAB ...

The eccentricity disturbance is approximately periodic and its frequency is a function of the rolling speed. A reasonable model for this disturbance is a second-order bandpass filter driven by white noise. This leads to the following generic model for each axis of the rolling process.

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Technological control for cold rolling processes

Roll eccentricity control Irregularities in roll geometry cause periodic varia-tions in the roll gap, which can lead to variations in ... of materials and types of rolling mills: Break down mills Multi-roll mills Two-stand mills DCR mills Tandem mills Temper mills Foil mills Superimposed strategies and solutions are avail-

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IMS Measuring Systemes in Tube Rolling Mills

IMS measuring systems for typical measuring tasks in Tube Rolling Mills such as Wall Thickness, Diameter, Eccentricity, Straightness, Surface Inspection and more

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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.

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Efficient Special Steel Mills from Primetals Technologies ...

The most common configuration is the single reversing mill. Various mill designs are offered that include 6-high UCMs (Universal Crown Control Mill), ZR mills and 12-high cold-rolling mills with small-diameter work rolls for the efficient rolling of materials of high hardness.

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Products › Flat › Cold Rolling Mills Lower investment for ...

Cold Rolling Mills Lower investment for high-quality plants. 32/115. Automobiles and shipbuilding, aircraft and spacecraft technology, medical machines, architecture and household appliances - the application fields for high-quality steel strip seem almost unlimited. ... Automatic eccentricity compensation. Cross products. Plant maintenance and ...

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Optimization of a Cold Rolling Mill - Thermo Fisher Scientific

The evolution of rolling mills has accelerated as the speed of processors and digital controls have grown by orders of magnitude. The capital cost in a rolling mill is substantial ... In order to see any eccentricity or periodic event related to a roll of this diameter, one would need to have a

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Sendzimir Mill Characteristics- Cold Rolling Mill - Hani Tech

Jun 03, 2019 · The main features of the Sendzimir mill in structure and performance are as follows: (1) Frame with integral casting (or forging), high stiffness and radial rolling force acting on each section of the frame. (2) The small diameter of the working roll, the high reduction rate of the pass, up to 60%. Some materials can be rolled into very thin ...

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SMS group GmbH: Cold pilger mills

Cold pilgering is a rolling process for metal tubes that reduces diameters and wall thicknesses. The Process. Located inside the tube is a stationary mandrel (1) which tapers in the rolling direction. This is attached to a long mandrel bar (2) which is secured in, and rotated by, a thrust block. Two dies (3) "form" the tubular stock in the same way that a rolling pin rolls out pastry.

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Rolling (metalworking) - Wikipedia

Modern rolling practice can be attributed to the pioneering efforts of Henry Cort of Funtley Iron Mills, near Fareham in Hampshire, England.In 1783, a patent was issued to Henry Cort for his use of grooved rolls for rolling iron bars. With this new design, mills were able to produce 15 times more output per day than with a hammer. Although Cort was not the first to use grooved rolls, he was ...

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串列式冷轧机 | Primetals Technologies

Upgrade conventional mill to Hyper UC-MILL with minimal modification Work Roll Shift 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

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(PDF) A novel real-time fuzzy-based diagnostic system of ...

Roll eccentricity is one of the most important and, consequently, any action directed to removing roll eccentricity or its effects will greatly improve thickness quality and reduce production costs.For instance, after the rolling of a strip, the mill operators may find that the thickness measured by the X-ray gauge at the exit of the FHSM is ...

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A SURVEY OF THE LOOPER-TENSION CONTROL

abnormal rolling condition. Thus, the specifications of dimensional quality 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-

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LQG Regulation: Rolling Mill Case Study - MATLAB ...

The eccentricity disturbance is approximately periodic and its frequency is a function of the rolling speed. A reasonable model for this disturbance is a second-order bandpass filter driven by white noise. This leads to the following generic model for each axis of the rolling process.

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Design of Active Disturbance Rejection Controller for the ...

【Abstract】 A nonlinear model of the rolling mill automatic position control system is derived based on analyzing the friction between roll and metal plate、the flexibility and the roll eccentricity force.The nonlinear characteristic of the automatic position control(APC) system is analysed.The result shows the APC system has chaotic characteristics.Aim at the characteristics of the ...

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