Call us toll free: +86-21-58386189, 58386176

mill vibration during cold rolling

  • 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

    Chat Online
  • Vibration Instability in Rolling Mills Modeling and

    Mar 26 2002 · 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

    Chat Online
  • Fundamentals of Roll Cooling and Control of Flatness at

    Fig 2 Heat Migration in Cold Mill Work rolls (Hotter regions shown in red) This localized heat input / output process results in a non-uniform distribution of heat circumferentially around the roll and transversely across the roll body. Additionally the roll is subjected to Thermal and Mechanical Fatigue during rolling

    Chat Online
  • Research Article Multiple-Modal-Coupling Modeling and

    rolling mill coupling vibration. Yun et al. proposed a model which allows rolls to vibrate along two orthogonal directions to study the vertical-horizontal coupling vibra-tion and suggested that mode coupling might also induce vibration. Since the vibration of a high-speed rolling mill always appears as the coupling of multiple vibration types

    Chat Online
  • vibration analysis rolling millhammer mill for sale

    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.

    Chat Online
  • Study on vibration characteristics of rolling mill based

    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 parameters was obtained.

    Chat Online
  • Everything you need to know about flatteners and levelers

    The material must stay flat during and after the cutting process. The temper mill cannot get the material as flat as a corrective leveler can and the leveler cannot get the material as stable or provide as fine a hot-rolled surface as the mill can. But the two together can produce some superb product.

    Chat Online
  • Analysis of Vibration for Sendzimir Mill in Cold Rolling

    In order to clarify the vibration phenomenon in the Sendzimir mill two simulation models were developed to calculate the natural frequencies of Sendzimir mill vibration and the frequencies of mill vibration during the cold rolling of stainless steel strip were measured. Two distinct vibration modes were found to be nealy 700 Hz.

    Chat Online
  • Dynamic Model of the Hot Strip Rolling Mill Vibration

    The vibration demolding of the crystallizer leads to slab thickness deviation in continuous casting processes. Therefore in this paper the dynamic model of the hot strip rolling mill vibration resulting from entry thickness deviation is proposed and its dynamic characteristics are studied. First the dynamic model of vertical vibration in the hot strip rolling mill is established based on

    Chat Online
  • Nonlinear Vibration Characteristic Analysis of Roller

    These studies are generally aimed at the situation where mill has strong vibration during speed-adjusting rolling process and corresponding dynamic model is used to explore the mechanism behind vibration. During hot rolling a main cause of large plastic deformation of rolled products of metal plates is static load. 14) During cold rolling

    Chat Online
  • ALUMINIUM 2018 Anti Chatter Device reduces vibrations in

    Since vibrations mainly occur at higher speeds in most cases the rolling speed of single- or multi-stand mills for steel and aluminum has to be limited. The most critical vibration issues when running cold rolling mills are the 3 rd Octave Chatter (100 Hz160 Hz) and the 5 th Octave Chatter (> 440 Hz).

    Chat Online
  • Mill variation control apparatus and methodNovelis Inc.

    Jan 02 2007 · 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.

    Chat Online
  • CONTROL PROCESS FOR A COLD ROLLING MILL BY

    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

    Chat Online
  • CHATTERBLOCK CHATTER VIBRATION IN COLD ROLLING

    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

    Chat Online
  • Vibration Reduction in a 5 Stand Cold Mill

    Vibration Types The complex nature of a five stand cold mill prevents the discussion of all steps performed to date to improve performance. We will discuss three basic types we encountered as we began to increase mill speeds Rumble Third Octave and Fifth Octave Rumble Vibration occurring near 100 Hz was encountered during acceleration

    Chat Online
  • Aluminium Sheet Rolling Machine

    Aluminium Sheet Rolling Machine. Maintaining Aluminium Rolling Mill Performance Avoiding a Decline in Aluminium Rolling Mill Performance Thickness control in aluminium rolling Chatter problems on a cold rolling mill Mill Vibration Phenomena during Cold Rolling Roll and Strip Chatter Marks 5th octave chatter A brief history of metal rolling for sheet and plate products

    Chat Online
  • Vibration analysis of a Sendzimir cold rolling mill and

    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

    Chat Online
  • Rolling process and its influence analysis on hot

    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.

    Chat Online
  • mill vibration screen equipmentistanbul-bilder

    Mill Vibration Phenomena during Cold RollingInnoval eccentric shaft in vibrating screens– Rock Crusher Mill eccentric shaft in vibrating screens XSM is a leading global manufacturer of crushing and milling equipment (eccentric shaft in vibrating screens) XSM also supply individual (eccentric shaft in vibrating screens) crushers and mills as well as spare parts of them.

    Chat Online
  • Strongly Nonlinear Dynamics of Torsional Vibration for

    Jan 20 2015 · The torsional vibration often occurs during the rolling process which will affect the production equipment. Based on electromagnetic field theory the air gap magnetic field energy of salient pole synchronous motor was given and the expression of electromagnetic torque was derived using the energy analysis method.

    Chat Online
  • Chatter Marks and Vibration Analysis in a S6-High Cold

    The analyzed rolling mill has six rolls able to roll steel strip coming directly from hot rolling mill train. The purpose of the present work is to identify the reason of the excitation in order to limit the problem. A solution based on empirical observations vibration analysis and considerations of a model is proposed.

    Chat Online
  • Rolling processesAl-Mustansiriya University

    consistently during rolling. For steel the desired temperature for rolling is around 1200_C (2200_F). The heating operation is called soaking and the furnaces in which it is carried out are called soaking pits. From soaking the ingot is moved to the rolling mill where it is rolled into one of three

    Chat Online
  • Rolling (metalworking)Wikipedia

    Hot rolling is a metalworking process that occurs above the recrystallization temperature of the material. After the grains deform during processing they recrystallize which maintains an equiaxed microstructure and prevents the metal from work hardening. The starting material is usually large pieces of metal like semi-finished casting products such as slabs blooms and billets.

    Chat Online
  • Vibration Monitoring System for Cold Rolling Mills and

    Vibration Monitoring System for Cold Rolling Mills and Tension Leveler . Business benefits. Correlating vibration data and machine data. by using one data acquisition system only Quality is certainly money in the Aluminium processing business. So when a process was causing a critical vibration it was a major issue for one of the leading

    Chat Online
  • (PDF) Active vibration suppression for rolling mills

    The exceptional vibration phenomenon of the F2 stand in two stand reversing cold mill while rolling results in cross striations on the surfaces of sheet steel and backup roll.

    Chat Online
  • (PDF) VIBRATION MONITORING OF TANDEM MILLS AT THE

    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

    Chat Online
  • Cold Rollingan overview ScienceDirect Topics

    Cold rolling reduction is an important factor that affects drawability of IF steel. It has been observed that increasing cold rolling reduction increases the r m value at least up to 90 34 .This effect has been shown in Fig. 5.14.Perhaps the most important parameters in the production of a strong 111 recrystallization texture are the annealing temperature and the time of holding 35 .

    Chat Online
  • Optimization of cold rolling process parameters in order

    Jan 09 2012 · Statistical analysis of the rolling parameters during the vibration of the five-cell cold rolling mill was conducted by Makarov et al. . Brusa and Lemma analyzed the dynamic effects in compact cluster mills for cold rolling numerically and experimentally. Their research activity was aimed to assess an approach suitable to model the cold rolling

    Chat Online
  • Optimization of cold rolling process parameters in order

    Jan 09 2012 · Statistical analysis of the rolling parameters during the vibration of the five-cell cold rolling mill was conducted by Makarov et al. . Brusa and Lemma analyzed the dynamic effects in compact cluster mills for cold rolling numerically and experimentally. Their research activity was aimed to assess an approach suitable to model the cold rolling

    Chat Online
  • 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

    Chat Online
  • Vibration Reduction in a 5 Stand Cold Mill

    Vibration Types The complex nature of a five stand cold mill prevents the discussion of all steps performed to date to improve performance. We will discuss three basic types we encountered as we began to increase mill speeds Rumble Third Octave and Fifth Octave Rumble Vibration occurring near 100 Hz was encountered during acceleration

    Chat Online
  • Vertical Vibration Model for Unsteady Lubrication in Rolls

    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

    Chat Online
  • ROLLER MILL VIBRATIONMine Equipments

    Mill vibration during cold rollingInnoval Technology Ltd 9 Nov 2006 In common with other rotating machines rolling mills are prone to many several types of rolling mill vibration

    Chat Online
  • mill vibration screen equipmentistanbul-bilder

    Mill Vibration Phenomena during Cold RollingInnoval eccentric shaft in vibrating screens– Rock Crusher Mill eccentric shaft in vibrating screens XSM is a leading global manufacturer of crushing and milling equipment (eccentric shaft in vibrating screens) XSM also supply individual (eccentric shaft in vibrating screens) crushers and mills as well as spare parts of them.

    Chat Online