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Based on vibration problems of a six roller cold rolling mill, hydraulic-machinery coupling vibration system dynamic model of the 2180mm 4-stand tandem cold rolling mills was built integrated the software of MATLAB and ADAMS and simulated. The simulation result was consistent with that of the field test data revealed by rolling mill …
2.1 Rolls system transverse bending vibration model 2.1.1 Model construction. Taking into account the symmetry of the upper and lower rolls system, the six-high rolling mill can be simplified to a simply supported three-beam system, as illustrated in Fig. 1.The rolls are connected by uniformly-distributed connecting elastic layer …
Considering the asymmetric structure of a rolling mill system, a chatter model is established by coupling a rolling process model and structure model to describe the asymmetric vibration ...
Also called double-loop couplings, these have a flexible center that reduces vibration and compensates for high parallel and angular shaft misalignment. Servomotor Precision Flexible Shaft Couplings Able to handle high twisting forces as well as misalignment, these couplings are good for high-performance servomotor applications.
In the process of strip rolling, mill vibration induces vertical and horizontal displacements in the rolls and rolled parts, affecting the accuracy of the rolling analysis model. Constant changes occurred in the rolling zone between the upper and lower working rolls due to mill vibration, resulting in slight vertical and horizontal displacements of …
coupling correspond to the requirements of the drive. If the allowable maximum bore is too small, select a larger Coupling; in case allowable safe speed is too low, a different type of Coupling will have to be considered. EXAMPLE : Required a coupling to connect a 20 H.P. / 980 R.P.M. Motor to a speed reducer driving an inclined assembly conveyor.
Grid couplings are a popular coupling option where both high torque levels and dampening requirements exist. Unlike gear and disc couplings (alternative metallic coupling types capable of transmitting a significant amount of torque), grid couplings have a unique ability to reduces vibration by as much as 30%, and cushions shock loads to …
In this paper, the static bifurcation and dynamic bifurcation of rolling mill system with torsional-horizontal coupling vibration are studied. Firstly, the dynamic …
Download Citation | Vertical–horizontal coupling nonlinear vibration characteristics of rolling mill under mixed lubrication | Considering the dynamic influence of the roll vibration on the ...
analyzed. The results can provide a theoretical basis for restraining and controlling rolling mill vibration. 2. Vertical-torsional-horizontal coupling vibration model of the rolling mill 2.1. Dynamic model of rolling process under nonlinear friction The geometry of the roll bite is illustrated in Fig. 1, where 1 $ 5 and 1 $ 6 are the original
6 P-1939-BB 6/22 Size Coupling Rating Nm Max Speed Min Bore mm 2 Max Bore mm 1 Cplg Wt. Kg 1 MR2/ kgm2 A mm B mm C mm D mm J mm Gap mm 2020 52 4500 13 27 1.8 0.0014 102 98 47.5 39.7 67 3.2 2030 149 4500 13 35 2.4 0.0022 111 98 47.5 49.2 68 3.2 2040 249 4500 13 44 3.2 0.0033 118 105 50.8 57.2 70 3.2 2050 …
Nonlinear dynamic rolling forces in the vertical and horizontal directions are, respectively, established, considering the impact of vertical and horizontal directions vibration of rolls. Then a vertical-horizontal coupling nonlinear vibration dynamic model of rolling mill rolls is proposed, based on the interactions between this dynamic rolling …
According to the "Hill rolling force formula", taking particular account of the influence from horizontal vibration of rolled piece in roll gap, a dynamic rolling force model is analyzed.
Yun et al. formulated a 2-DOF coupling model by coupling the horizontal vibration and vertical vibration of rolls, then the expression of dynamic component of the rolling force was derived, and ...
Paton [6] confirmed the coupling of vertical vibration and horizontal vibration by rolling mill vibration experiments. Yan et al. [7] studied the coupling characteristics of vertical …
Why SKF? Couplings The global range of shaft couplings is so vast that the SKF range is focused on the ability to supply a coupling type that can satisfy nearly all applications in all types of industry. The available range includes: Flex (Tyre) couplings, FRC couplings, Jaw couplings, Gear couplings, Grid couplings, and Chain couplings.
Rolling mill system may lose its stability due to the change of lubrication conditions. Based on the rolling mill vertical–torsional–horizontal coupled dynamic model with nonlinear friction considered, the system stability domain is analyzed by Hopf bifurcation algebraic criterion. Subsequently, the Hopf bifurcation types at different …
consideration of the coupling interaction between the mill's vertical vibration, its torsional vibration and the working roll's horizontal vibration, and also analyzed the vibration characteristics of different forms of rolling mill vibration under the coupling effect[16]. However, this model ignores
The basic jaw coupling (known as an L-line, and pictured above next to "Compression Loaded" title), has many variations for specific applications. These include aluminum (lightweight) and stainless steel …
the Karman's balance theory. Based on these dynamic rolling forces and the mechanical vibration of the rolling mill, a vertical–horizontal coupling nonlinear vibration dynamic model was established. The amplitude–frequency equation of the main resonance was derived by using the multiple-scale method.
Typical applications: generator sets, crusher, mills, shredders, general industry. Technical data Torque: up to 130 kNm: Speed: up to 2,650 rpm: Mounting options: Separate mounting; ... If a highly flexible coupling is installed, the vibration amplitude will become a finite value. A reciprocating diesel engine does not convey its power evenly ...
Through testing and analyzing the vibration signals of the mill in the rolling process, the rolling mill's coupled model is established with comprehensive …
apparatus to predict the vibration spectrum for rotor misalignment. A 4 Jaw flexible coupling was used in the experiments. The rotor shaft accelerations were measured at rotor speed of 30 Hz i.e. 1800 RPM using accelerometer and a Dual Channel Vibration Analyzer (DCVA) under the aligned (baseline) and misaligned conditions.
The dynamic characteristics of the strip fluctuation between two stands are preliminarily revealed combined with the finite element method. Through experiment …
An effective dynamic model is the basis for studying rolling mill vibration. Through analyzing characteristics of different types of vibration, a coupling vibration structure model is established, in which vertical vibration, horizontal vibration, and torsional vibration can be well indicated. In addition, based on the Bland-Ford-Hill …
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 ...
The factors that influenced the horizontal vibration response, such as excitation models, stiffness of guide shoes, and cabin parameters, were analyzed by solving the vibration acceleration of the coupling system. Vibration acceleration was measured through experiments to verify the theoretical results. The vibration acceleration of the …
Download Citation | Study on Vertical-Horizontal Coupling Vibration of Mill Rolls Based on the Nonlinear Rolling Force Model | Based on the Orowan unit pressure differential equation, a vertical ...
vibration and torsional changes. Flexible couplings are often used to drive pumps, fans, compressors, motor generator sets, conveyors, crushers, vibrating screens, etc. Because a flexible coupling joins two machines / equipment, it may be …
Back To Manufacturer List Lovejoy (by Timken) – Flexible Shaft Couplings. ISC Companies and Adams-ISC can supply the Lovejoy (by Timken) products listed on this page and many others found on the Lovejoy website.For more information or for a product quote, please contact us by phone 763-559-0033, by email [email protected], or by filling …