freedom. Under certain conditions, this cross-coupling can cause the bearing to be unstable and an oil whirl will result. The tilting-pad journal bearing [17,18,19,20,21,22,23] consists of several individual journal pads which can pivot in the bore of a retainer. The tilting pad is like a multilobe bearing with pivoting lobes, or pads.
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Bifurcation and chaos for electromechanical coupling torsional vibration in rolling mill system driven by DC motor is studied in this paper. Considering the electromechanical devices under unsaturated magnetic circuit, the dynamical equation of electromechanical coupling vibration in rolling mill drive system is deduced by using the dissipation Lagrange equation.
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The vibration of rolling mill often occurs in rolling process. The occurrence of vibration not only affects the quality of rolling products, but also leads to breakdown of the rol
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A coupled vibration model of hot rolling mill rolls under multiple nonlinear effects is established by considering the nonlinear spring force produced by the hydraulic cylinder, the nonlinear friction between the work rolls, the dynamic variation of rolling force, and the effect of external excitation as well as according to the structural constraints of a four-high hot rolling mill in the ...
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[Premsai, 3(7): July, 2014] ISSN: 2277-9655 Scientific Journal Impact Factor: 3.449 (ISRA), Impact Factor: 1.852 IJESRT INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY Failure Analysis of Rollers in mill stand using Failure mode Effect Analysis Tadisetti Premsai, Anga Kiran Vikram Varma, S.Sivarajan * * School of Mechanical …
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Driveline Service of Portland is an authorized distributor for most major universal joint component and coupling manufacturers including Spicer/GWB, Elbe, Gewes, Rexnord as well as many others. We carry one of the nations largest inventories of these high quality products in order to provide the industry leading service to our customers. For a ...
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Gear Couplings for Cold Roll Machine. We are engaged in manufacturing and supplying of gear couplings for cold roll. Fabricated using quality enforged steel, these gear couplings effectively transmits torque and power between two shafts. Provided with high tensile fixing bolts, these couplings are capable of taking high jerk load.
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Abstract 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 stand.
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A coupling for a mill roll and the like comprises a connector having a coupling bore therein, with the bore having a first surface shaped for close fitting engagement with a neck portion of the roll adjacent one extremity of the coupling engagement therebetween and a second surface shaped for close fitting engagement with the roll neck adjacent the opposite extremity of such …
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A rolling mill comprising a roll unit and a drive unit for driving the roll unit. The drive unit comprises an outer housing, a pair of large-diameter ring-like driving bevel gears disposed concentric with the pass line, an input shaft mechanism for rotating the driving bevel gears, and transmission mechanisms for transmitting the torque of the driving bevel bears to the rolls.
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12%The drive system of a hot rolling mill is the power source to roll strip, which is mainly composed of a gearbox, a main spindle, a herringbone gear box, spindles and a roll system. The spindle connecting the herringbone gear box and the roll system adopts an arc tooth gear structure, which has a strong transmission capacity in the coupling.
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Roll stand performance requirements for steel pipe production are very high. Pipe diameters of up to 1,800 mm are continually subjected to measurement and quality controls during the production process. The drive performance in this case lies in the high torque range.. Overload couplings with an automatic re-engagement function are used between the transfer units and the rollers …
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The flattening between work roll and strip and the flattening between rolls are important components of the important influence on controlling of the strip crown and flatness [1,2,3,4,5,6,7,8,9,10].For the flattening between work roll and strip, because of the strip width is shorter than the work roll length more the 200 mm and the contact arc length is far less than …
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Markets. Being a pioneer in seals and sealing solutions backed with decades of field experience, Max Spare is a reliable source for standard or complex sealing parts specific to your industry applications and equipment. We thus ensure that our solutions meet the changing needs of our customers, as well as the latest industry trends and regulations.
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As demonstrated in many papers [1–8] and engineering projects, the roll eccentricity and variation of strip material quality (thickness, hardness, etc.) will lead to motor speed fluctuation, then generate current harmonics and therefore causing the unstable or vibration rolling process within electromechanical coupling in main drive system.Thus, those …
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By site assessment, the roll system vibration is reduced obviously, and it is inhibited rolling mill mechanical- electronic-liquid coupling vibration phenomenon, …
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Koyo Engineering Journal English Edition 63E (2003) 49 1. Introduction In rolling mills for steel or nonferrous metals, the connection of the roll with the drive shaft (hereinafter referred to as DS) is usually performed by inserting the roll edge into the coupling cavity on the DS side. The roll section on the coupling side is generally ...
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FIGS. 2, 4, 6 and 7 illustrate further features of each extractor car 11 and 12 which relate to providing a sled 61 employed to facilitate dismantling and assembling of both a drive coupling mounted on one end of a work roll and an outboard bearing chock mounted on an extended journal of a backup roll.
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Built-in motor, belt drive, coupling Yes/No Synchronization with room temperature, machine-to-machine synchronization, oil feed rate (L/min) Max. speed (min-1) Normal speed range (min-1) Operating speed range (min-1) Load center Applied load Radial load Fr (N) Axial load Fa (N) Speed Machining frequency Intended bearing life
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For conventional rolling mill drives, the joints of the upper and lower shafts are arranged directly above one another. The maximum possible roll-side joint diameter is obtained based on the minimum work roll diameter. For highly loaded drives, the work roll diameter and joint diameter are generally the same.
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Machinable Easy-Access Base-Mounted Shaft Supports. Create a support that fits the exact dimensions of your shaft. Good for use with square- and hex-profile shafts, these aluminum supports also work with round shafts of any diameter up to 1". Use them for light-to-medium-load linear motion applications where shaft alignment is not critical.
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Contact us. Email: info@cardanshaftmanufacturers dullabhcommercials@gmail Call us: +91-022-23876633 +91-022-64160788 Address: 386, Ahmmed chambers, Opp. Swastik Cinema, Lamington Rd, Near Opera House, Mumbai - 400 004, Maharashtra (India)
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A plate mill rolling stand driven by two motors with an input power of 10000kW each, with 200% short-term overload capacity and an annual contact time of 25% of 6500ℎ yearly operating time, is upgraded from a drive solution with slipper spindles ( = 99,1%), where oil-grease lubrication (roll side slipper joint grease lubricated, and
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Title:Review on Main Drive Torsional Vibration and Roller Coupling Vibration of Rolling Mill VOLUME: 15 ISSUE: 3 Author(s):Xiao Bin Fan*, Bin Zhao, Yu Jiang and Bing Xu Fan Affiliation:School of Mechanical and Power Engineering, Henan Polytechnic University, Jiaozuo 454000, School of Mechanical and Power Engineering, Henan Polytechnic University, Jiaozuo …
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A rolling mill drive with at least one drive spindle arranged between a drive unit and a driven roll and terminating in a spindle head connected detachably to the neck of the roll. A coupling and decoupling device is arranged between the neck of the roll and the spindle head of the drive spindle. The coupling and decoupling device includes a coupling sleeve, a coupling pin …
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However, when operator reverses mill and rolls capture the slab, drives usually are accelerated, gaps are kept closed by inertial torque of roll, and the dynamics in the driveline is not as high ...
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The Journal of Engineering The 9th International Conference on Power Electronics, Machines and Drives (PEMD 2018) Use of automated electric drives for limiting dynamic loads in shaft lines of roll mill stands eISSN 2051-3305 Received on 22nd June 2018 Accepted on 2nd August 2018 E-First on 15th April 2019 doi: 10.1049/joe.2018.8135
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Outotec Grinding technologies 007 the mill drive train to be brought closer to the mill, between two counter-rotating rolls; a fixed roller and a which in turn allows for smaller foundations and lower floating roller. The fixed roller is supported by the press installation costs. frame and the floating roller by hydraulic and pneumatic systems.
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Also, with 10 inches of spindle bore, most rolls and shafts can be inserted thru the machine spindle for performing end work and journal repairs. Rolls and Shafts requiring OD grinding. Our roll grinder is capable of grinding rolls and shafts up to …
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The operator of the rolling mill also installed SafeSet torque-limiting couplings between the motor and the universal joint shaft. In case of an overload, the coupling disconnects the driveline immediately and protects the universal joints, roll necks and other transmission components.
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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 and square columns are …
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