The dynamic behavior of the coupled vibration system can be controlled by varying the bifurcation parameter. This study provides a theoretical basis for restraining the vibration of hot rolling mill rolls and …
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In order to study the hot Compact Strip Production (CSP), four-high mill vibration characteristics, and vibration suppression method, the roller system structure stability was analyzed and calculat...
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The influence of nonlinear factors on the vibration of the rolling mill is studied by Niziol et al., they established the vertical vibration dynamic model with two degrees of freedom [10, 11]. Bayón et al. considered that the nonlinear friction coefficient and nonlinear equivalent stiffness of hydraulic cylinder were caused by the change of ...
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1. Introduction. The vertical roller mill (VRM) is heavy mechanical equipment that used in the cement materials industry to process cement, slag, and coal cinder (Pani & Mohanta, Citation 2015).The equipment always needs to work in the environment of heavy load, high temperature, high pressure, high corrosiveness, …
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During milling, each element affects the rigidity of the system machine–tool holder–workpiece–tool . The vibrations strongly affect the surface roughness and have a significant impact on tool life . Cutting parameters, machining strategies and the cutting tools used are just a few of the factors that have an impact on vibration .
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Metals 2021, 11, 170 4 of 24 Figure 2. Structure diagram of a four-high hot rolling mill. 2.1. Piecewise Nonlinear Spring Force Model The hydraulic elastic stiffness refers to the nonlinear ...
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Evidently, the impact of the mill stiffness compensation on the mill vertical vibration differs with the thickness of the excitation frequency, and the impact should be discussed according to the ...
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This Mobile VSI Crusher Plant mainly based on the vertical impact … Over-vibration device is equiped to protect the … pdf*vibration in vertical roller mill – apparatus for … CS Cone Crusher Hammer Crusher VSI Crusher ; Grinding Equipment … pdf*vibration in vertical roller mill. … Industrial vibration sensor selection: …
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Vibration milling is a type of mechanical milling that utilizes vibrations to generate an impact force that breaks down particles into smaller sizes. This process is commonly used in various industries for material processing and synthesis.. Vibration milling is a milling process that uses the principles of mechanical vibration and impact to reduce the …
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2.1 Dynamic Model. The rolling mill drive system mainly consists of the motor, reducer, main shaft, speed divider, arc gear shaft, work roll and bearings at corresponding parts [].The torsional vibration is often closely related to the dynamic energy transformation process of the rolling interface, which causes the relative speed between …
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To reveal the impact of vertical nonlinear vibration on the stabilization of the precision cold rolling system, the vertical nonlinear vibration model with consideration of structural gap and dynamic rolling force has been established. Utilizing the Magnus series method with high accuracy and long-term numerical stabilization, we calculate the …
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mill vibration mainly includes vertical vibration and horizonta l vibration of rollers, t ransverse and . longitudinal vibration of strip [1, 2], ...
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In the study of electromechanical coupling vibration of mill main drive system, the influence of electrical system on the mechanical transmission is considered generally, however the research for the mechanism of electromechanical interaction is lacked. ... SUN J L, PENG Y, LIU H M, et al. Vertical vibration of moving strip in rolling …
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A vibration monitoring method of strip rolling mill based on the digital twin model was proposed which could effectively reduce the structure complexity and test cost of the traditional monitoring system. Firstly, the coupling vibration mechanism model of the dynamic characteristics of roll system and bearings of four-high mill was established. …
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What is a Vertical Shaft Impact Mill (VSI)? Vertical Shaft Impact Mills, commonly referred to as VSI, operate on the principle of high-speed rotor impact to break down materials into smaller particles. Within a vertical orientation, materials are fed into the center of the mill where a high-speed rotor propels them against the crushing chamber ...
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This paper investigates the adaptive fuzzy vertical vibration suppression control problem for the six-high rolling mill system. Firstly, a new vibration model is established with the consideration ...
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Vibration in hot tandem rolling mills has been a problem in the iron and steel industry mainly due to its unpredictability. In this work, vibration data of the second finishing mill (F2) stand of a hot tandem rolling mill are collected and analyzed, and a mathematical model based on the coupling of a non-uniform deformation process, mill …
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In this paper, vibration characteristics of a Vertical Roller Mill (VRM) are studied by using physical parameters of an operating VRM. The mathematical model is …
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Vibration monitoring is one of the most important methods to detect and diagnose faults in gearboxes. Planetary gearbox in vertical axis coal mill experienced high impact load and severe working condition that increase wear and shorten usage life.
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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 …
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equipment also has an important impact on rolling mill vibration.16–18) In the hot rolling process, faster and harder rolling is required to obtain thinner, higher quality strips. ... Therefore, in this paper, a 3-DOF vertical vibration model of strip mills with compound failure of the inner and outer raceways of work roll bearings is ...
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Considering the impact of roll vibration displacement and film thickness on dynamic rolling force, a vertical–horizontal coupled vibration model was established and solved by using the multi-scale method. Finally, the actual rolling mill parameters were used for numerical simulation and related dynamic analysis.
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During milling, the entire body of the mill undergoes a small but frequent vibration that is generated by an eccentric motor, and size reduction occurs by repeated impact. This vibration is usually, but not necessarily, in a vertical plane.
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During the production of cold-rolled strips, the high-speed operation of rolling mills generates vibrations that significantly impact the production efficiency, the …
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Coupled vibration model and dynamic equation of work roll on rolling mill with DVA control. Vertical vibration of the mill can be divided into two types according to the vibration frequency. The first type of vertical vibration frequency distribution is generally in the 120–258 Hz, usually called the third octave vibration, and its vibration ...
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The cold rolling mills are complex electro-hydro-mechanical systems in which vibrations are usually detected as issues during production process. In the present work, the vibrations with frequencies of 80Hz were found at top of the rolling mill and the pressure behind servo valve during the production process. In order to understand the …
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The CSP middle mills had severe vibration during rolling the thin container strip. So this paper studied the hysteretic characteristic of rolled strip and established the …
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The impact of process parameter optimization on the dynamic response of the rolling mill system is examined. The optimized rolling process parameters effectively reduce the vertical vibration of the rolling mill system. The vibration of the rolling mill has been a persistent issue affecting its safe and stable operation. To address the ...
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1. Introduction. Rolling mills are the main sheet-forming equipment in the world. A variety of nonlinear vibration behaviors occur in rolls during production, such as vertical vibration, torsional vibration, bending vibration, and various forms of coupling vibration [1], [2], [3], [4].The causes of these vibration behaviors fall into three main …
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The vibration of the ball mill foundation will seriously affect the operation stability of the ball mill. ... earth pressure and vertical deformation. ... For the transient impact of the ball mill ...
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Considering the nonlinear stiffness constraint action from the hydraulic cylinder in the four-high rolling mill process, the vertical vibration dynamic model with …
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An additional difficulty in milling thin-walled structures is the reduced rigidity of the workpiece—which also affects vibration during machining. We have compared the vibration signal for different approaches to machining thin-walled components with vertical walls made of Ti6Al4V titanium alloy and Inconel 625 nickel alloy.
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The rolling mill vibration not only seriously causes the strip thickness heterogeneity, but also damages the rolling mill equipment and its electrical components. Existing vibration suppression methods are passive and mainly tune mechanical, hydraulic, electrical and rolling process parameters. A new active vibration suppression method …
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Increasing the external excitation overall enhances the intensity of vertical vibration, allowing the rolling mill roll system to quickly initiate vibration within a small …
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