hot rolling mill roll eccentricity

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FAULT DIAGNOSIS OF ROLL SHAPE UNDER THE SPEED CHANGE .

Keywords: Diagnosis, Eccentricity, Fast Fourier Transform (FFT), Rolling force, Roll Shape Fault. 1. INTRODUCTION among rolling force model, rolling mechanism, and The continuous processing systems such as multi-stand hot rolling systems generally consist of various components like driven rolls, idle rolls, sensors. In the rolling system, a ...

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GENERAL ASPECTS OF ROLL COOLING FOR HOT & COLD ROLLING MILLS

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. Cooling and lubricating is furthermore essential for the plateout for ...

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Roll eccentricity sensor for steel strip rolling .

Roll eccentricity sensor for steel strip rolling mills . By Joe F Chicharo and Tung S Ng. Abstract. The authors present a novel roll eccentricity sensor that retrieves the required roll eccentricity controller reference signal. The sensor implements a modified comb filter structure, which can be arranged in either tunable or adaptive form. The comb filter consists of a number of second-order ...

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Rolling of steel in Hot Strip Mill – IspatGuru

Hot strip mills in these days are either conventional hot strip mills or strip mills for rolling thin slabs. The primary function of the conventional hot strip mill (HSM) is to reheat the semi-finished steel slabs (rolled or continuously cast) to the rolling temperatures and then to roll them thinner and longer through a series of rolling mill stands driven by large motors and finally coiling ...

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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 piercing stage but only inspect the quality of ...

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Active compensation of roll eccentricity in .

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

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Active compensation of roll eccentricity in .

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 ...

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Roll Eccentricity Extraction Method Based on .

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 force. It is difficult ...

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GENERAL ASPECTS OF ROLL COOLING FOR HOT & COLD ROLLING MILLS

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. Cooling and lubricating is furthermore essential for the plateout for ...

Get Price

GENERAL ASPECTS OF ROLL COOLING FOR HOT & COLD ROLLING MILLS

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. Cooling and lubricating is furthermore essential for the plateout for ...

Get Price

US3543549A - Rolling mill control for .

Method of controlling roll eccentricity of rolling mill and apparatus for performing the same method WO1985000998A1 (en ... Process and apparatus for eliminating the excentricity effect of rollers in hot and cold rolling mills for metal sheets : Cited By (26) * Cited by examiner, † Cited by third party; Publication number Priority date Publication date Assignee Title; US3926024A (en) * 1969 ...

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

Roll eccentricity elimination control PC1: Rougher master, table master PC2: Rougher sub-machine control master PC3: Machines around rougher mill control master, Automatic gauge control PC4: Slab cooling temperature control Figure 2 Configuration of computer control system for hot strip rolling mill Roll thermal crown calculation Finisher set-up calculation/learning ABS: Absolute AGC ASC ...

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Roll Eccentricity Phase Identification System | .

Roll eccentricity signal is difficult to directly measured, should fuse many kinds of detectable signal to be extracted through the data analysis which includes rolling force, roll gap, incoming thickness of rolled piece, exit thickness, tension, and so on. This paper puts the four high mill as an object, according to the influence of the main factors of roll eccentricity ——backup-roll ...

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Roll Eccentricity Control Using Identified .

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 of roll eccentricity control using ...

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hot rolling mill roll eccentricity - BINQ Mining

20.12.2012· et al. Roll eccentricity control for strip rolling mills (1987): This paper describes a controller design for a hot rolling mill.The main purpose of the algorithm is to improve the control of the cross-width thickness prole of .

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US3543549A - Rolling mill control for .

Method of controlling roll eccentricity of rolling mill and apparatus for performing the same method WO1985000998A1 (en ... Process and apparatus for eliminating the excentricity effect of rollers in hot and cold rolling mills for metal sheets : Cited By (26) * Cited by examiner, † Cited by third party; Publication number Priority date Publication date Assignee Title; US3926024A (en) * 1969 ...

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Strip Thickness Control of Cold Rolling Mill with .

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 ...

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The Planetary Rolling Mill - macsphere.mcmaster.ca

2. Typical Planetary Mill equipment plan 3. Roll system cross-section 4. Simplified speed conditions in Planetary Mill 5. Flow pattern in classical hot rolling 6. Flow of material in plasticine bar. 7. In-homogeneous deformation of material between rolls 8. 11 Bite11 of individual work roll 9. Rolling forces in Planetary Mill 10. Back-fin on ...

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A BASIC UNDERSTANDING OF THE MECHANICS OF ROLLING MILL ROLLS

Secondary scale on hot strip and the impact on wear is another issue. Stresses from Hertzian pressure in 4-high cold mill back up rolls were measured years ago, the results were never published, but of high interest - also, maybe later. K. H. Schröder July 2003 K. H. Schröder: A BASIC UNDERSTANDING OF THE MECHANICS OF ROLLING MILL ROLLS

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Roughing Mill - an overview | ScienceDirect Topics

Roughing mill rolling of reheated slab: The roughing mill usually consists of one or two roughing stands in which the slab is hot rolled back and forth 5 or 7 times repeatedly to reach the minimum thickness requirement. The roughing mill also contains edger rolls that are used to roll the edge of slab and center it. A rectangular head end is critical to thread the finish mills and down coilers ...

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

12.11.2013· Cold Rolling Mill; Thickness Control; Roll Eccentricity; Fuzzy Neural Network; Eccentricity Compensation 1. Introduction Rolling strip is widely used for automobile manufactur-ing, food packaging, electric appliances, ma-chinery, light industry, instruments, communications, mil-itary affairs and other fields [1]. The design of a control-ler in the cold rolling system that can .

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Advanced Reversing Cold Mills by Primetals .

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 ...

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Impact Analysis of Roller System Stability for .

Modern four-high mills all set corresponding offset value [1, 2], such as 2050 CVC four-high rolling mill and 4300-medium plate mill of the German SMS, four-roll rolling mill of the British DAVY, 1580-pair cross four-high rolling mill of Japan Mitsubishi heavy industries. But these modern four-high mills with offset all have roller parallel positioning instability, and with the increasing of ...

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equipment rolling mill roll eccentricity ntrol

15 jun 1996 the roll eccentricity in a rolling mill may define the limit of achievable thickness for the automation equipment in hot rolling mills as well as in cold rolling mills. r. isermann, k. lachmann, d. matkoadaptive control systems. rolling - primetals technologies ness wedge of the rolled product without strip-steering control. lateral displacement i think that machine learning in ...

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hot rolling mill roll eccentricity - BINQ Mining

20.12.2012· et al. Roll eccentricity control for strip rolling mills (1987): This paper describes a controller design for a hot rolling mill.The main purpose of the algorithm is to improve the control of the cross-width thickness prole of .

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Rolling processes - Al-Mustansiriya University

Hot-rolled metal is generally free of residual stresses, and its properties are isotropic. Disadvantages of hot rolling are that the product cannot be held to close tolerances, and the surface has a characteristic oxide scale. Steelmaking provides the most common application of rolling operations. Figure (5-2) illustrates the sequence of steps in a steel rolling mill to show the variety of ...

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CiteSeerX — FAULT DIAGNOSIS OF ROLL SHAPE .

In this study, a new diagnosis method for roll eccentricity under the roll speed changes was developed. The new method was induced from analyzing the rolling mechanism by using rolling force models, radius-speed relationship, and measured rolling force, etc. Simulation results by using the field data show that the proposed method is very useful ...

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Roll Eccentricity Extraction Method Based on .

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 force. It is difficult ...

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rolls for rolling mill - LinkedIn SlideShare

[email protected] Machinery and Metallurgical Rolls SINOM GROUP CO., LTD. 22 / 24 Cold Rolling Mill Intermediate Roll Cold Rolling Mill Intermediate Roll Cold rolling mill intermediate Roll applies to high precision 6-Hi (as well as a few 8-Hi) mill, named from working location between work roll and back-up roll, mainly used to control the shape of strip. Material specification of 2%Cr, 3 ...

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Hot Rolling Mill - YouTube

23.04.2012· (Roll forming: ) This film takes you through the processes within a hot rolling mill. You'll get to see the different stages all t...

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