Theoretical and Experimental Analysis of Chatter in Tandem Cold

A four high mill stand can be presented as a vibration system with four degrees of freedom which is assumed to vibrate along the longitudinal principal direction It consists of four mass elements including the top and bottom work and backup rolls and all forces due to elastic nbsp

Optimization of cold rolling process parameters in order to

9 Jan 2012 Farley 6 obtained the typical mode shapes of a rolling mill that can become excited during third and fifth octave chatter They calculated a threshold rolling speed on all cold mills where gauge chatter vibration will become self exciting Statistical analysis of the rolling parameters during the vibration of the nbsp

Torsional Vibration Analysis of Drive System for 6 High Cold Rolling

The torsional vibration model of main drive system for 6 high cold rolling mill was established Calculation formula of torque amplification factor TAF of main drive system was put forward when the clearance exists or not The TAF curve changing by the biting time of blank was drawn and whether torsional vibration could nbsp

Rolling Mill Model for Torsional Vibration Analysis

Rolling Mill Model for Torsional Vibration Analysis Upper Load Roll Rolling Mill Model for Torsional Vibration Analysis Drive Motors Lower Load Roll Home Resumé Technical Experience Publications Consulting Seminar

Chatter in a S6 high rolling mill Aimeta

Keywords Chatter rolling mill vibration analysis Chatter in rolling is considered to be the result of interaction between rolling mill structure and rolling process Three basic types of chatter can be classified in rolling mills torsional third octave mode and fifth octave mode chatter Among various types of rolling chatter nbsp

Asymmetrical rolling and self excited vibration in a hot roughing mill

6 40 6 45 2 1992 quot Interaction Between Different Vibration Modes in the Hot Roughing Mill quot I C C M E Conference Singapore pp 339 344 3 1992 quot Asymmetrical Rolling and Hot Roughing Mill Vibrations quot ASME Journal of vibration and Acoustic to be submitted 4 1993 quot Vibration Analysis of a Hot roughing Mill during nbsp

Chatter Marks and Vibration Analysis in a S6 High Cold Rolling Mill

6 Oct 2013 The analyzed rolling mill has six rolls able to roll steel strip coming directly from hot rolling mill train The purpose of the present work is to identify the reason of the excitation in order to limit the problem A solution based on empirical observations vibration analysis and considerations of a model is nbsp

Vibration Based Condition Monitoring ofRolling Mill CiteSeerX

new logic along with a new maintenance technique is suggested through this present work This maintenance technique is nothing but vibration based condition monitoring which is discussed with following articles Keywords Bearing reactions FFT Analyser Fiber Pressuriser Maintenance Strategy rolling mill vibration nbsp

Experimental and Numerical Investigation on the Roll J Stage

28 Jul 2017 the back slip and forward slip zone In the rolling mill structure it mainly includes torsional vibration analysis in horizontal plane studied by Vladimir et al 5 vertical vibration analysis in the vertical plane studied by Kimura et al 6 vertical torsional coupling vibra tion analysis studied by Niroomand et al 7 nbsp

control process for a cold rolling mill by vibrations and torque

Keywords Cold rolling mill torque vibration chatter quality control roll stand vibrations Fig 2 Schedule for the rolling mill parameters recorded 1 work roll 2 rolls support 3 backup roll 4 mill stand frame 5 horizontal From the analysis made one can conclude that the greatest value for movements speed nbsp

Predictive Maintenance pdf Primetals

earliest stages your equipment needs regularly scheduled periodic vibration signature analysis With more than 125 years of experience in the design and production of high speed rolling mill equipment and after more than three decades as a pioneer in the vibration condition monitoring industry Primetals Technologies is nbsp

Maintenance and quality related condition monitoring in rolling mills

analysis of the practical use and return on investment of these or similar monitoring systems These systems are used in both the steel and aluminium industries A vibration monitoring system for high speed rolling mills will initially be described Cold rolling mills tend to vibrate at high rolling speeds under certain conditions

Chatter problems on a cold rolling mill Innoval Technology

This type of speed dependant vibration will be a mechanical forced vibration within the rolling mill for example due to a defective gear or bearing Hence the team collected data for all potential sources of forced vibration Careful analysis of the vibration data showed the source to be a work roll bearing defect

An integrated System for Condition Monitoring and Process Analysis

Areas of application Troubleshooting Process analysis Quality Documentation Condition Monitoring Power Quality Gauging System Control Automation of Test Benches Critical vibrations in rolling mills Monitoring Systems CMS use vibration measurement in combination with intelligent analysis pro cedures

Analysis of Vertical Horizontal Coupling Vibration Characteristics of

21 Mar 2014 Nonlinear dynamic rolling forces in the vertical and horizontal directions are respectively established considering the impact of vertical and horizontal directions vibration of rolls Then a vertical horizontal coupling nonlinear vibration dynamic model of rolling mill rolls is proposed based on the interactions nbsp

1 rolling mill vibration analysis projects univib

In most cases projects were commissioned to investigate strip marking problems The investigations have usually involved monitoring and analysis of the vibration occurring during rolling inspection of the strip and in many cases modal analysis of the roll stack and mill structure has been carried out to identify resonant nbsp

OVERLOAD AND CONDITION MONITORING IN ROLLING MILLS

Keywords Condition Monitoring Fault Detection Fault Diagnosis Signal Analysis results in hot and cold rolling mill applications and explains VIBRATION EXCITATION IN ROLLING MILLS Each machine with rotary drives vibrates even if the main focus is laid to the vibration minimization already in the design phase nbsp

Rolling Mill amp Grinder Chatter IVC Technologies – CBM Services

competition and no manufacturer can afford quality issues such as Rolling Mill and Roll Grinder Chatter Flutter or Barring which result in increased conversion costs lost production and loss of customer confidence Due to the complexity of the rolling and grinding processes typical vibration analysis techniques come up nbsp

Study on Torsional Vibration of Six High Cold Rolling Mill

mill The mechanical model and mathematical model of the main drive system of six high cold rolling mill are established based on the F4 frame which was the strongest vibration The natural frequencies is calculated by using MATLAB On this basis the simulation analysis of damping clearance and stiffness in the main nbsp

Condition Monitoring for Rolling Mills GfM

The optimal solution for securing a largely trouble free operation is the monitoring by online condition monitoring systems For engines transmissions and pedestal bearings vibration diagnosis is advisable Dynamic effects are determined at best by torque analysis However offline measurements are suitable either for nbsp

Vibration Instability in Rolling Mills Modeling and Experimental

Yarita I K Seino Y Takimoto T Nakzato Y and Nakagawa K 1978 An Analysis of Chattering in Cold Rolling for Ultrathin Gauge Steel Strip Trans Iron Steel Inst Jpn 18 pp 1–10 4 Yun I S Wilson W R D and Ehmann K F 1998 Chatter in the Strip Rolling Process ASME J Manuf Sci Eng 120 nbsp

Vibration analysis of a Sendzimir cold rolling mill SAGE Journals

Abstract The presence of several rolls in cluster cold rolling mills makes on line vibration monitoring and failure analysis difficult The dynamic behaviour of rolls strongly depends on the rolling pressure in the roll bite Strip vibration applies a dynamic component on the rolling force acting on the work roll and may excite the nbsp

Vibration diagnostics in rolling mills Millennium Steel

condition of the plant and the product quality Vibrations can lead to component failures speed variations surface defects and strip thickness undulations and many are inter linked through cause and effect An overview of rolling mill vibrations the procedure of vibration diagnosis for the analysis of causes and effects leads nbsp

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