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#0183;#32;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. A was the operation side of the bottom work roll (WR) bearing, location B was the operation side of the
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 natural resonance of the machine which significantly increases the motion of critical components.
#0183;#32;Iamp; rolling of7i%jijs and non%%;??;rip three The first kind During testing at Dofasco, on a 5 Stand Sheet Enill, when The frequency of the vibrztion for this particular nil1 was The vibration was accorapanied by While the phenomenon has been known to exist for quite some Mill vibrdtion has been reported as limiting the out The study of Cold Mill Vibration at Dofasco was initiated to The work
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
Highspeed rolling and high reduction usually are desirable as increase mill productivity in the cold strip rolling. However, most often, these conditions lead to the creation of chatter vibration
and 150Hz, is a selfexcited 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,
#0183;#32;In common with other rotating machines, rolling mills are prone to many different vibrations during rolling and most do not cause a problem. However, there are several types of rolling mill vibration that can have a significant impact on the quality and/or productivity of the cold rolling
Dynamic behaviour of cold rolling mill with unsteady lubrication rollgap interface during sheet... 00:00:00 This paper presents the results of developing a vibration model for the rolling mill vertical system with respect to the roll gap under the unsteady lubrication conditions to address the frequently selfexcited vibration phenomenon of rolling mill vertical systems.
Cold rolling mills show a complex vibration behavior, consisting of natural vibrations of the plant mechanics as well as excitations from the drive or bearings but also vibrations caused by defects. The aim of the monitoring is to detect vibrations that are caused by external excitation or faults.
Download Citation | Coldrolling mill vibration and its impact on productivity and product quality | This chapter describes the common types of mill vibration that can be experienced during the
Download Citation | Nonlinear vibrations in cold rolling mills | The problem of selfexcited and nonlinear parametric vibration occurring in cold strip rolling processes is analysed. The non
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
#0183;#32;Mill vibrations (chatter) especially occurring at high rolling speeds affect product quality of the coldrolled material and thus lead to yield losses and quality issues. Among other supportive measures active chatter damping has turned out to be an effective approach to counteract these problems by significantly reducing vibration issues of cold mills.
#0183;#32;Zheng et al. (2017) established a spatial vibration model of a sixhigh cold strip rolling mill based on multibody 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.
The vibration of clustertype mills such as the 20high Sendzimir mill is complicated due to their multiroll structure. 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.
Vibration Measurement of the Rolling Mill The cold rolling process is usually conducted with a workpiece that is initially at room temperature. A schematic illustration of the 6high cold rolling mill is shown in Fig. ) The stands are arranged to produce a sequential reduction in the thickness of the strip. Work rolls are the tools
Request PDF | Dynamic analysis of vibration stability in tandem cold rolling mill | Tandem cold rolling mills are comprehensive dynamic systems coupling with structure and rolling technology. A
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