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 …

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In this paper, we propose an effective mechanical-electrical-hydraulic-interfacial coupling vibration model for hot rolling mills and obtain a practical measure to relieve mill vibration. First, an experiment related to mill modulus control gain in automatic gauge control (AGC) is carried out during manufacturing. Rolling mill vibration is observed to gradually be enhanced with …

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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. …

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Vibration analysis of a Sendzimir cold rolling mill and bearing fault detection E Brusa, L Lemma, and D Benasciutti Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 2009 224 : 8, 1645-1654

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A numerical model of the rolling mill including the driv-ing system was built as rigid bodies to perform the multi-body dynamic analysis. The static rolling force of the mill was measured and the dynamic rolling force was computed according to the analytical model. Because the 6-high cold rolling mill is structurally symmetrical, only the upper ...

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The traditional mill chatter mechanism model cannot meet the monitoring and rapid diagnosis needs of the rolling process in the field. In this paper, a data-driven mill vibration analysis method is proposed. The main objective of this study was to develop a mill

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Wu S, Wang L, Shao Y, et al. Vibration characteristic analysis of twenty-high rolling mill with local defect on roll surface based on the time-varying contact stiffness. …

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IVC Technologies is dedicated to helping customers achieve optimal process and manufacturing efficiency through Condition Based Monitoring (CBM). Our highly experienced and certified CBM Analysts utilize cutting-edge technology and …

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Chatter vibration of a 4-hi rolling mill was studied by examining the step and frequency response that specific excitation produces in 3-D finite element analysis. Methods of suppressing chatter ...

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Wu S, Wang L, Shao Y, et al. Vibration characteristic analysis of twenty-high rolling mill with local defect on roll surface based on the time-varying contact stiffness. Eng Failure Anal 2014; 42 ...

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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 resonance of the mill stand.

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The rolling mill vibration model [1] [2][3] is a class of nonlinear dynamic systems that evolves from a simple linear model to a complex nonlinear dynamic model. According to the structure and ...

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Vibration Analysis Executive Summary Vibration is increasingly becoming a problem as machine speeds have increased and paper quality requirements have risen along with increased competition. Balance grade G1 is requested and more time is spent on balancing the rolls in the machine. However, by balancing, mills typically measure only the

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Cold rolling plays a crucial role in flat steel production. In recent years, it has become extremely difficult to ignore the existence of chatter, also called "ghost vibration" by operators who work in milling plants [], which restricts the quality and efficiency of strip production.Fig. 1 shows the layout of a tandem cold rolling process. Mill vibration often occurs in stand 4 and 5 ...

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Fault Detection of Roller Bearing Using Vibration Analysis . Rabinarayan Sethi. 1.Subhasini Muduli. 2 . Abstract—The rolling elementbearings are commonly used in rotating machinery, it mostly covers a broad range of rotating machinery and plays a significant role in industrial applications which is considered as a most critical element.

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Rolling mill vibration is a worldwide problem, although it has been found that the mill structure defects are the main cause of vibration, but the inhibition measures are difficult to implement. So we discussed the rolling force parameters influence on rolling mill vibration and suppression measures from rolling technology in this article. The results show that the rolling …

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Mill Vibration Phenomena during Cold Rolling. All machines vibrate during operation. However, only a few of these vibrations cause problems to the product or the machine itself. Typically, the most damaging vibrations involve a …

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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 …

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811. FREQUENCY ANALYSIS OF CHATTER VIBRATIONS IN TANDEM ROLLING MILLS. MOHAMMAD REZA NIROOMAND, MOHAMMAD REZA FOROUZAN, MAHMOUD SALIMI, MOHSEN KAFIL 853 VIBROENGINEERING.JOURNAL OF VIBROENGINEERING.JUNE 2012.VOLUME 14, ISSUE 2.ISSN 1392-8716 Several …

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The analysis of rolling mill vibrations is usually limited to simple planar or low DOF vibrations. In reality, however, rolling mill vibrations take place in six DOF leading to spatial behaviors ...

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Mill Vibration Phenomena during Cold Rolling. All machines vibrate during operation. However, only a few of these vibrations cause problems to the …

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Considering the two kinds of nonlinear constraints of rolling mill hydraulic cylinder, spring force and friction force, the vibration model of rolling mill system is established. The amplitude frequency response equations are obtained by using the average method. Comparing the time history curves of vertical vibration displacement of rolling mill system under the …

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Chinese rolling mill undertakes condition monitoring and vibration analysis to extend the life of its board mill equipment. Finnish heavy process machinery specialist Valmet will provide roll maintenance and condition monitoring services to Shanying International at …

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The vertical vibration often occurs during the rolling production, which has an influence on the accuracy of rolling mill. In order to effectively suppress the vertical vibration of the rolling equipment, the rolling mill model with vibration absorber device was established. Based on the main resonance singularity of the rolling mill system, the best combination of opening …

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AbstractModels for the occurrence of the vibrational instability during rolling known as third octave chatter are presented and discussed. An 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 ...

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