In manufacturing industry Gear boxes are one of the important components in power transmission. Consequently any damage in the gearbox can lead to unprecedented downtime. In machines the gear trains vibrate due to many reasons such as the non regular 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 resonance of the mill stand. This problem motivates predicting the cluster mill dynamics by
In this paper a horizontal vibration problem in strip rolling was studied; dynamic model was established; the mechanism of self-excited vibration was analyzed. The main reason of surface quality of strip is self-excited vibration. A vertical natural frequency and vibration mode of the rolling mill
A mill vibration monitoring system was developed to monitor the oscillating movements of the rolls in the tandem cold rolling mill. A sketch of the rolling mill vibration data monitoring system and the specific locations of the sensors (locations A, B, C, and D) were shown in Fig. 3.Location A was the operation side of the bottom work roll (WR) bearing, location B was the operation side of the
Vibration Analysis of Rolling Element Bearing Faults. Localized faults in a rolling element bearing may occur in the outer race, the inner race, the cage, or a rolling element. Each of these faults is characterized by its own frequency, which is usually listed by the manufacturer or calculated from the bearing specifications.
Spot-checking Condition vibration signal using Narrowband For a quick spot-check of the condi- and Cepstrum Analysis. It is impor-tion of the mill's many hundredtan tha ats ver oyf thi h resolution (zoom) rollers, the Broadbandi Vibratio uses fod r this analysisn. Paper ma-1 •,1 1 -----^ - --^j - - - */ vibration
An approach of field multi-point vibration test for hot rolling mill housing is presented. The self-excitation-vibration mechanism is studied and the vibration source is detected, both using the techno logy of power spectrum analysis and wavelet package analysis of vibration signal. The analysis
Jun 13, 2019In a cold rolling mill, the process data recording system ibaPDA has been used for process data analysis, but the vibration measurement data was evaluated separately. With ibaInSpectra as add-on to the ibaPDA system, the acquired vibration signals can be analyzed within defined frequency ranges.
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 resonance of the mill stand. This problem motivates predicting the cluster mill
Mar 26, 2002An analysis of rolling mill chatter was performed for the purpose of identifying characteristics of the vibrations and to determine any dependency on the rolling schedule. In particular, a stability criterion for the critical rolling speed is used to predict the maximum rolling
This rolling mill uses preventive and break-down maintenance strategies. But, these strategies seem to be inadequate.To reduce the losses, a 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
This article deals with the discussions about the load variation during rolling process in a rolling mill and its effect on the vibration amplitudes. The load variation also affects the life of rolling mill components. ‚Using vibration measurement and Analysis
most important parts of cold rolling mills. This phenomenon causes severe damage for the mill machine and strip quality (Fig. 1). Fig. 1. Strip faults, due to rolling mill vibration The integrated control process is made to analyse the vibrations which are produced on the work roll chocks and backup roll chocks.
Rolling Mill – ground-borne vibration control A Local Authority had been investigating complaints about ground vibration from residents near a factory using rolling mills. Narrow band frequency analysis of the vibration revealed two distinct and separate types of vibration – tonal vibration
Rolling Mills. Many drives and more rollers in a harsh environment, partially under unfavorable temperature conditions, are characteristic of rolling mills. For engines, transmissions and pedestal bearings vibration diagnosis is advisable. Dynamic effects are determined at best by torque analysis. However, offline measurements are suitable
Jun 13, 2019In a cold rolling mill, the process data recording system ibaPDA has been used for process data analysis, but the vibration measurement data was evaluated separately. With ibaInSpectra as add-on to the ibaPDA system, the acquired vibration
Example 1. A furnace combustion fan, which supplies billets to a rolling mill, is highly critical and a Stage 2 defect will require that planning begin to replace the bearing. The next opportunity for replacement could be in 6 to 12 months, by which time the fault may have progressed to a higher stage. Modern vibration analysis provides a
This article deals with the discussions about the load variation during rolling process in a rolling mill and its effect on the vibration amplitudes. The load variation also affects the life of rolling mill components. ‚Using vibration measurement and Analysis for Predictive Maintenance
A vibration analysis is about the art of looking for changes in the vibration pattern, and then relating those changes back to the machines mechanical so faults with the rolling elements and coupling problems can be detected. for centrifugal fans at energy plants and paper mills all around Finland.
Understand mill vibration issues, such as 3rd octave gauge chatter and 5th octave roll/strip marking, with our Rolling Mill Vibration Model. In common with other rotating machines, rolling mills are prone to many different vibrations during rolling