Parametrical excitement vibration in tandem mills
Download Citation | Parametrical excitement vibration in tandem mills - Mathematical model and its analysis | The study of vibration phenomena in tandem rolling mill with use of mathematical ...
mill vibrations on its
Influence of mill modulus control gain on vibration in hot …
The rolling mill vibration is characterized by the coupling effects among mechanical, electrical, hydraulic and interfacial subsystems. The influence of the mill modulus control gain in automatic gauge control on the vibration in hot rolling mills was investigated. Firstly, an experiment related to the mill modulus control gain was carried …
Spatial Vibration and Its Numerical Analytical Method of …
The rolls in contemporary four-high mills cannot be maintained parallel during the rolling process. Therefore, four-high rolling mill vibrations take place in six degree of freedom (DOF) leading ...
(PDF) Measuring the Size of Vibrations on a Mill Using the Vibration …
When processing materials using the milling technology, regenerative fluctuations of vibrations are the decisive factors, which limit productivity.
Vertical nonlinear vibration analysis of cold rolling mill …
Assuming that the vertical vibration occurs perpendicular to the sheet and the vibration of the upper and lower rolls is symmetrical about the center plane of the sheet [20, 22], the vertical nonlinear vibration model can be established as shown in Fig. 2.The equivalent mass m is concentrated on the theoretical rotation center of the upper work roll.
Vibrations of tandem cold rolling mill: coupled excitation of …
Vibration issues of a five-stand tandem cold rolling mill were found in the steel production practice, and the experimental observation and numerical analysis indicated that the …
Spatial Vibration and Its Numerical Analytical Method of …
The rolls in contemporary four-high mills cannot be maintained parallel during the rolling process. Therefore, four-high rolling mill vibrations take place in six degree of freedom (DOF) leading to spatial behaviors involving vertical, horizontal, axial, torsional, cross and swinging vibration modes resulting in complex relative motions between the …
Research on Dynamic Modelling, Characteristics and Vibration …
The impact of rolling mill vibration extends beyond product quality to equipment health, making vibration control crucial. This study addresses the issue of frequent abnormal vibration in hot strip finishing mills by employing a combination of theory, simulation, and experimentation to analyze the dynamic behavior of the mill and …
Vibration characteristics of an operating ball mill
A ball mill, which is used to finely grind materials, causes high levels of vibration and sound during grinding operations. The vibration and sound of mills provide significant information about ...
Rolling mill vibration and its impact on productivity
The common types of rolling mill vibrations such as low frequency forced vibrations, third octave gauge chatter, and fifth octave chatter that can be experienced during the rolling …
Methodology of Designing Cold Rolling Technology Preventing Vibrations
Second and third inter-stand gaps of five-stand cold rolling mill 1700: rolling with tension in both gaps (metal thickness 1.2 mm; metal width 1200 mm).
Methodology of Designing Cold Rolling Technology Preventing Vibrations
Due to this issue, along with the nonstationary character of rolling and rolling mill load regime, rolling with tension may transform into rolling with pressure, which results in enhanced energy consumption, while a rapid change in rolling with pressure and tension may lead to the emergence of adverse self-excitation vibrations on cold rolling ...
Characteristic recognition of chatter mark vibration in a rolling mill
J. J. Gasparic, Vibration analysis identifies the cause of mill chatter, AISE Year Book, (1991) 27–29. Google Scholar . E. Edhi and T. Hoshi, Stability of high frequency machining vibration by extended chatter model, Precision Engineering, 26(2) (2002) 204–213. Article Google Scholar . A. Światoniowski and A. Bar, Parametrical excitement …
Study on the effect of rolling mill dynamic …
rolling mill vibration, and its impact on steel production. Shi et al. [1] improved a 1D, 2D . convolutional neural network using multisource se nsing data, and dev eloped a new method of .
Research on vibration characteristics of mill rolls based on …
The components of rolling mill vibration system all are nonlinear, and the performance in nonlinearity is slightly different. Hydraulic system is a classic nonlinear system in rolling mill vibration system, but it often manifested weakly nonlinear. For high-precision position control mill vibration system, nonlinearity is also not negligible.
Sensor Placement Optimization of Vibration Test on …
speed mill, the measuring points should be placed on the locations that re ect abundant structural information of medium-speed mill. So the OSP for vibration test on medium-speed mill is extremely necessary. In this paper, a reliable nite element model (FEM) of medium-speed mill supported by spring vibration-isolated foundation is built,
Rolling interface friction dynamics of hot strip continuous …
So, adopting proper lubrication conditions to improve the friction behavior and eliminate the adverse effect is an important aspect for the rolling process stability and rolling mill vibration inhibition study. Furumoto designed a chamber in the Mill Stabilizing Device and optimized its size for suppressing the mill vibration [1].
Vibrations of tandem cold rolling mill: coupled …
By the long-term monitoring of the vibration of the mill frame, it is found that the vibration frequencies increased with increasing rolling speeds but decreases with increas-ing back-up roll diameters. The trends of rolling mill vibration frequencies under different rolling speeds and different back-up roll diameters are shown in Fig. 2a. The ...
Chapter 4.4 Noise and Vibration
from coal-mining sources, which are not included in IRMA, but it provides an exemplary discussion of blasting vibration and its impacts. 233 The structural vibration issues in this chapter (4.4) relate to buildings and structures. Chapter 3.2 includes job related vibration such as caused
Spatial vibration of rolling mills
To develop an analytical method for spatial vibration analysis of rolling mill, a 250 mm (diameter of the roll) high-stiffness rolling mill (without housing) is taken as an object for analysis.As shown in Fig. 2, the upper and lower chocks are connected by two square columns and two rods with left and right threads.Connections between chocks …
Study on the effect of rolling mill dynamic stiffness on …
Recent theoretical studies on rolling mill vibrations have focused on monitoring and reducing rolling mill vibration, and its impact on steel production. Shi et al. [1] improved a 1D, 2D convolutional neural network using multisource sensing data, and developed a new method of depth learning to improve mill monitoring and maintenance, …
Spatial vibration of rolling mills | Request PDF
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 ...
Mechanism characteristic analysis and soft measuring …
The following reasons lead to the nonlinear, non-stationary, and multi-component characteristics of mill shell vibration signals: (1) the pulp viscosity inside the mill is complex and difficult to measure; (2) the wear and corrosion of steel balls and mill liners are difficult to determine; (3) the size distributions of material load particles ...
Optimization of material grinding in vibration mills
Vibration mills are widely used to obtain powders with the particle size of the final product of less than 10 microns. Depending on the design of a drive from and the nature of vibrations of a ...
Prediction and analysis of cold rolling mill vibration based on …
In this paper, a new framework for mill vibration monitoring and a data-driven mill vibration early-warning method for a cold rolling mill is proposed. SVR, an NN …
Interdependence between rolling mill vibrations and the …
Friction-induced vibration is a typical self-excited phenomenon in the rolling process. Since its important industrial relevance, a rolling mill vertical-torsional-horizontal coupled vibration model … Expand
Vibration Characteristics of Hot Rolling Mill Rolls Based …
and mill vibration marks [21]. Feng et al. analyzed the influence of the strain rate of a thin slab in the rolling zone on the rolling force during high-speed hot rolling and established
Vibration Feature Extraction and Analysis of Industrial Ball Mill …
The vibration signal analysis for lab model sag mill is same as that of ball mill, but the frequency of operation of vibration signal and impact strengths are different [8]. Sag mill will require a higher value of g and BW of the sensor due to higher stiffness compared to that of ball mill (as the length of the mills is accounted).
Types of mid-frequency vibrations appearing during the rolling mill
The paper presents the numerical analysis of vibrations with moderate frequencies excited during the milling process taking into account the transportation motion of the strip and its inertial ...
Coupling vibration characteristics and vibration suppression …
This paper designs a spring-damping dynamic vibration absorber for suppressing rolling mill vibration based on the work roll structure and working …
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