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rolling mills eccentricity

Online Monitoring System Design for Roll Eccentricity in

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...

Method of measuring and compensating roll eccentricity of

Rolling mill eccentricity compensation using actual measurement of exit sheet thickness: 1987-03-10: Oliver et al. 72/8: 4126027: Method and apparatus for eccentricity correction in a rolling mill: 1978-11-21: Smith, Jr. et al. 72/21: 3882705: Roll eccentricity correction system and method: 1975-05-13: Fox: 72/11: 3881335: Roll eccentricity

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.

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

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-

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

LQG Regulation: Rolling Mill Case Study MATLAB & Simulink

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.

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

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.

Rolling Technology and Theory for the Last 100 Years: The

At the time when the past basic research and development flowered, development of many new type rolling mills with the crown-shape control function were reported. 72,73,74,75,76,77,78) A pair cross rolling mill with a big effect of profile control for hot rolling mills was put to practical use, 79) which became a standard rolling mill for the

Advanced Reversing Cold Mills by Primetals Technologies

However, because the rolling parameters can be quickly changed for each coil, reversing cold mills are especially suitable for the small-lot production of various product types. The size of the mill equipment is also smaller, which allows easier access to mill equipment and machinery for maintenance purposes.

US3543549A Rolling mill control for compensating for the

Variation in the rolling load may however be due to factors other than variations in the gauge of the ingoing material, such factors as for example, eccentricity and ovality of one or more 7 of the rolls of the mill and when automatic gauge control is used which depends for its operation on variations in the rolling load, compensatory forces

A. Kugi, W. Haas, K. Schlacher, K.Aistleitner, H. M. Frank

KEYWORDS: Cold Rolling Mill; Thickness Control; Roll Eccentricity; Fuzzy Neural Network; Eccentricity Compensation. JOURNAL NAME: Engineering, Vol.6 No.1, January 13, 2014. ABSTRACT: In rolling mill, the accuracy and quality of the strip exit thickness are very important factors.

A Robust Data-Driven Fault Detection Approach for Rolling

Oct 04, 2019 This brief proposes a robust subspace-aided fault detection approach for rolling mill processes with roll eccentricity. The novelty of this brief relies on the closed-loop identification of the so-called data-driven realization of the stable kernel representation (SKR) of the rolling mill process. In order to ensure an accurate and robust closed-loop identification, the mappings among the

Seamless steel pipe produces eccentricity (uneven

Mar 29, 2019 Our seamless steel tube plant performed a Fourier transform on the measured wall thickness data of Φ400mm automatic tube rolling mill, perforation, secondary perforation (extension), automatic rolling and uniform rolling process, and

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-

A. Kugi, W. Haas, K. Schlacher, K.Aistleitner, H. M. Frank

KEYWORDS: Cold Rolling Mill; Thickness Control; Roll Eccentricity; Fuzzy Neural Network; Eccentricity Compensation. JOURNAL NAME: Engineering, Vol.6 No.1, January 13, 2014. ABSTRACT: In rolling mill, the accuracy and quality of the strip exit thickness are very important factors.

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.

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

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

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.

Seamless steel pipe produces eccentricity (uneven

Mar 29, 2019 Our seamless steel tube plant performed a Fourier transform on the measured wall thickness data of Φ400mm automatic tube rolling mill, perforation, secondary perforation (extension), automatic rolling and uniform rolling process, and obtained uneven wall thickness. The quantitative analysis and the reasons for its formation, and based on this

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.

Rolling Technology and Theory for the Last 100 Years: The

At the time when the past basic research and development flowered, development of many new type rolling mills with the crown-shape control function were reported. 72,73,74,75,76,77,78) A pair cross rolling mill with a big effect of profile control for hot rolling mills was put to practical use, 79) which became a standard rolling mill for the

Advanced Reversing Cold Mills by Primetals Technologies

However, because the rolling parameters can be quickly changed for each coil, reversing cold mills are especially suitable for the small-lot production of various product types. The size of the mill equipment is also smaller, which allows easier access to mill equipment and machinery for maintenance purposes.

Roll Eccentricity Extraction Method Based on Comprehensive

Roll eccentricity is ubiquitous in strip mills, which has a periodic impact on the strip thickness difference. Roll eccentricity compensation is an important part of the automatic gauge control system. Most roll eccentricity compensations extract the roll eccentricity based on the frequency domain analysis of the rolling

Seamless steel pipe produces eccentricity (uneven

Our seamless steel tube plant performed a Fourier transform on the measured wall thickness data of Φ400mm automatic tube rolling mill, perforation, secondary perforation (extension), automatic rolling and uniform rolling process, and obtained uneven wall thickness. The quantitative analysis and the reasons for its formation, and based on this

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},

Improvement of thickness tolerances in aluminium cold

The analysis of a two-stand aluminium cold rolling mill has shown that process-related disturbances such as backup roll eccentricities and harmonic strip hardness variations can make it difficult to meet the target thickness tolerance. Backup roll eccentricity is not only the result of grinding and roll assembly tolerances, but can also be