mill vibration during cold

Experimental and Numerical Investigation of the …

A rolling mill that includes the driving system was modeled by multibody dynamics to investigate the cause and characteristics of the chatter vibration. The proposed numerical model was validated by theoretical analysis and an experiment that was carried out during manufacturing.

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Research on Vibration of Tandem Cold Rolling Mill …

In the light of chatter marks on the surface of high-class strip in 2180 tandem cold rolling mill, some comprehensive site tests were made. According to data analysis and inherent characteristics of vibration, the suspicious source of rolling mill vibration was found.

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Dynamic analysis of vibration stability in tandem cold ...

2019-10-1 · Zheng et al. (2017) established a spatial vibration model of a six-high cold strip rolling mill based on multi-body transfer matrix method, and demonstrated the vibration characteristics of the mill. Recently, several attempts have been made to analyze chatter characteristics in tandem rolling mills, especially the effect of friction on vibration.

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Statistical Dynamics of the Rolling Mills | SpringerLink

Bar A, Bar O, Swiatoniowski A (2006) Vibration of mill rolls during the cold rolling of a steel strip by the “chaotic approach”. In: Proc. of the “Steel Rolling 2006”, the 9th International and 4th European Conference, France Google Scholar

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Vibration Instability in Rolling Mills: Modeling and ...

Models 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.

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Research Article Multiple-Modal-Coupling Modeling and ...

2019-7-30 · vibration on a test cold mill and discussed the quantita-tive relationship between rolling process parameters and the rolling torque. Krot [] created a drive transmission ... During the vibration of rolls, the volume of the roll bite changes simultaneously. Considering the control vol-umeofthematerial owwithintherollbite,Huetal.

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Spatial vibration characteristics of six-high cold strip ...

2019-4-16 · (2018). Spatial vibration characteristics of six-high cold strip rolling mills. Ironmaking & Steelmaking: Vol. 45, No. 10, pp. 893-898.

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vibration_图文_百度文库

2011-9-2 · Spindle Involvement In Rolling Mill Vibration. Iron and Steel Engineer, 1992, (8): 79-84 [8] Liu, Bin ; Zhao, Wu. Study on Torsional Vibration Measuring Model of Spanless Point of Rotating Shaft. China Mechanical Engineering, 2006, 17(14): 1435-1438 [9] Zhao

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Aluminium International Today

Mill vibration phenomena during cold rolling Assan Alüminiyum’s sustainability-oriented approach guides it through the pandemic. DIGITALIZATION Improving management of the value chain. CIRCULAR ECONOMY Focus on Circular Aluminium Action Plan Beyond the finish line - …

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Universal Joints Help Reduce Mill Vibration

Ameridrives engineers work closely with steel mill operators around the world to replace their cold mill gear spindles, which amplify vibration, as they drive the work rolls on the mill stands. Americardan universal joints operate at high misalignment angles up to 15° and are suitable for use in severe atmospheric conditions.

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CONTROL PROCESS FOR A COLD ROLLING MILL BY …

2017-10-19 · the torque and to measure the mill parameters as well (the force, the mill speed, the gap between work roll etc.). This system is a part of the integrated control process. Keywords: Cold rolling mill, torque, vibration, chatter, quality control, maintenance 1. INTRODUCTION

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(PDF) VIBRATION MONITORING OF TANDEM MILLS …

Mill vibration during cold rolling. February 2007. T. Farley; In common with other rotating machines, rolling mills are prone to many different vibrations during rolling and most do not cause a ...

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Prediction and analysis of cold rolling mill vibration ...

2020-11-1 · 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 ...

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Chatter in Machining: Milling & Lathe Vibration [ Easy …

Chatter is a resonant vibration in the machine or workpiece. It can become quite violent and generate a distinctive loud noise. It’s almost never a good idea to keep machine in the face of strong chatter–chatter in machining is very bad for your tool life, interferes with the accuracy of the machining operation, and will shorten the life of ...

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Mill variation control apparatus and method

2007-1-2 · The present invention relates to mill vibration control apparatus and to a method of restricting vibration in a mill stand. During cold rolling of metal, a continuous strip of metal is passed through a mill stand so as to reduce the gauge (thickness) of the metal strip. Fundamentally, the mill stand consists of a pair of rolls that, when in use ...

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Rolling Grinding Mill Cold Aluminium

Mill Vibration Phenomena During Cold Rolling Innoval. The rolling speeds on cold mills suffering from this type of gauge chatter vibration are often constrained for certain products for these products the rolling speeds are kept below the threshold speed at which mill vibration occurs this vital tool assists in the solution of rolling mill ...

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1994 Asymmetrical rolling and self-excited vibration in a ...

2018-4-18 · 4-1993, "Vibration Analysis of a Hot roughing Mill during Asymmetrical Rolling", 2nd Asian-Pacific Conference on Computational Mechanics, Sydney. 5-1993, "Mechanical properties of Hot Steel", 13 th Australasian Conference on the ... 1.2.5 Torsiona in cold rolling 14 l vibration 1.3 Vertica 16 l vibration 1.3.1 Introductio 16 n 1.3.2 Stri and ...

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vibration problems in roller mills of power plant

2012-11-15 · Mill vibration during cold rolling – Innoval Technology Ltd … types of cold mill vibration that can cause problems during the rolling of steel and aluminium sheet, including third octave and fifth octave chatter. »More detailed

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A BASIC UNDERSTANDING OF THE MECHANICS OF …

2003-10-15 · on wear is another issue. Stresses from Hertzian pressure in 4-high cold mill back up rolls were measured years ago, the results were never published, but of high interest - also, maybe later. K. H. Schröder July 2003 K. H. Schröder: A BASIC UNDERSTANDING OF THE MECHANICS OF ROLLING MILL ROLLS File: SCHROEDER_ROLLS_010703.DOC

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THE STUDY OF INFLUENCE OF WORK ROLLS VIBRATION …

elastoplastic deformation during cold rolling and its surface quality. MODEL DESCRIPTION In order to reveal the mechanism of defects occur-rence on the surface of steel cold rolled strips during work rolls vibration, the finite element method imple-mented in the DEFORM-2D program was used. The 4th stand of the 5-stand mill 1700 of PAO Severstal ...

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CHATTERBLOCK CHATTER VIBRATION IN COLD ROLLING*

2020-4-6 · operation. 3rd octave mill chatter, typically occurring in a frequency range between 90 and 150Hz, is a self-excited vibration phenomena typically occurring in the rear stands of tandem cold mills. It can produce significant gauge variations and even cause strip breaks. 3rd octave mill chatter is characterized by a quickly diverging

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Vertical Vibration Model for Unsteady Lubrication in Rolls ...

2019-8-29 · The cold rolling process is a high speed, transient, and time-related metal machining molding process [1]. As cold rolling mill is a multimass and rotary motion object system, the vibration as an implicit factor commonly exists in the course of its operation, but it usually does not apparently present due to the conditional constraints of ...

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Rolling Mill Production Line: How to Avoid Accidents in Cold ...

2019-10-24 · Rolling mill runout usually occurs during high-speed rolling of extremely thin strip. Because of the beating, the thickness of the strip fluctuates, it is easy to break the strip. Therefore, once the rolling mill has obvious beating sound, the rolling speed shall be reduced immediately to eliminate the vibration.

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Coupling vibration model for hot rolling mills and its ...

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 increasing mill ...

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Vibration Reduction in a 5 Stand Cold Mill

2019-11-8 · department or AK Steel customer rejections due to Cold Mill vibration. Summary During this four-year program we have continuously reduced mill vibration by installing “Hydraliners,” upgrading the pinion stands, and replacing gear spindles with universal joints. This reduced vibration has resulted in improved quality and productivity.

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(PDF) Multiple-Modal-Coupling Modeling and …

Cold Rolling Mill Vibration Lingqiang Zeng, Yong Zang, and Zhiying Gao School of Mechanical Enginee ring, University of Scienc e and T echnology B eijing, Beijing 1000 83, China

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CHATTERBLOCK CHATTER VIBRATION IN COLD ROLLING*

2020-4-6 · and 150Hz, is a self-excited vibration phenomena typically occurring in the rear stands of tandem cold mills. It can produce significant gauge variations and even cause strip breaks. 3rd octave mill chatter is characterized by a quickly diverging vertical vibration of the rolls for specific rolling conditions (material, mill speed, forces,

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Multi-factor coupling system characteristic of the …

2020-7-2 · vibration are investigated. During cold unsteady rolling, the friction in the roll gap is generally in a mixed state of lubrication and friction. Therefore, it is of importance to establish a rolling mill system dynamic model of the roll gap by considering the mixed unsteady lubrication. This paper aims to develop a multi-factor coupling dynamic

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Risk Assessment and Control Measures for Cold Rolling …

2015-8-7 · Cold rolling mill complex is equipped with the most . modern stainless steel production lines, sourced from leading manufacturers of the world. Coil build up line, bell anneal furnaces continuous annealing and pickling lines, sendzimer mills, skin pass mill, strip grinding line, slitting and shearing lines to …

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