torque in rolling mills calculation formula with example

Development of Strip Shape Meter with High Accuracy Under ,- torque in rolling mills calculation formula with example ,*4 Manager, Design Group 1, Rolling Mill Design Department, Mitsubishi-Hitachi Metals Machinery, Inc *5 General Manager, Research , The strip shape calculated with the torque measurement value showed a smaller elongation on the.Fuzzy algorithm for calculating roll speed variation based on , - kaistfuzzy algorithm might be useful in reducing the thickness deviation in the actual hot rolling mills 1999 Elsevier Science Ltd All , calculated the required rolling force, torque, and power in terms of other process parameters such as thickness.



Upper-bound technique; Cold-Rolling; Aluminium Sheet- Mill

Abstract Upper bound solutions to a 4-High reversing aluminium cold-rolling sheet mill was obtained in this work using , by shear along these lines can be calculated and equated to , Also, W=Torque (T) *angular velocity (ω) - for rotating

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CHAPTER 4_v6

The work and energy method is an approximate technique of estimating the forces/torque and power required in metal , For example, the maximum load, Pmax , applied for compressing a cylinder can be approximated as , K V W ε ε Eq 42 From equation 41 and 42 we can obtain the required pressure; , Rolling mill (machines); rolling process is carried out on a machine called rolling mill The rolls

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Patent US3253438 - Automatic strip gauge control for a rolling mill ,

As each pass is completed, information is fed back to the computer for the roll separating force, the drive motor torque, the , It is assumed that the schedule will be calculated in groups of passes such that the operation of the mill will not be.

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Catalog - Johnson Power Ltd

Packaging Paper Mills Calenders Drives, Sizing, Couch and Press Roll Driv Plastic Mfg Pumping Irrigation, Lift, Sewage, Fire Dewatering , Comparison of universal joint torque capacity vs calculated application torque 2 Calculating.

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Chapter 3 Theory 1: Hot Rolling Force and Torque - Durham e-Theses

Jing, Limei (2001) Rolling mill roll design, Durham theses, Durham University , 38 A Example for Calculating Rolling Separation Force 37 , now achieve the calculation of rolling force, rolling torque and some deformation

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An investigation on the roll force and torque fluctuations during hot ,

mills renting powerful process tools to satisfy the requirement of product development Throughout this century, much , analysis method to match the calculated rolling force and torque with the measured roll- ing force and torque by treating.

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Reduction of shape defects and yield losses by , - EU Bookshop

condition, the profile of the mill rolls (incorporating ground profile, thermal camber and wear effects), the stock geometry ,, The specific torque for upper and lower roll was calculated as the measured torque divided by the symmetrical torque

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Rolling Process - Virtual Lab-Dayalbagh Educational Institute

Given below is the example of a four stand continuous mill or tandem mill , ROLLING MILLS:- Rolling mill is a machine or a factory for shaping metal by passing it through rollers Successive , Since there are two rolls, the torque is given by.

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Mill Setting Calculation System for Aluminum Rolling Mill - IHI

rolling mills This paper outlines the setting calculation systems we have provided to recent rolling mills Table 1 shows our , be theoretically calculated into mathematical models, , rolling torque, which vary widely depending on the material.

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Roll force, torque, lever arm coefficient, and strain distribution in ,

Due to the growing importance of width control in strip and plate mills, edge rolling is currently an im-portant process in hot rolling mills Research in , Measured roll forces are similar to calculated forc Furthermore, the.

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Rolling conditions in hot strip mills and their influence on the ,

Summary The mechanical rolling conditions in hot strip mills are precisely defined by various variables, which are taken directly froth the rolling schedule (separation force, torque speed strip thickness) or calculated from figures of the rolling

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Numerical Simulation of Shape Rolling - DiVA

predict roll forces and roll torques with a fair accuracy, but the predicted area reductions are a , An example of such a rolling mill is ABS Luna , means that all variables are referred to the last calculated (updated) configuration, Bathe [6]

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Rolling Lab

Outline Introduction to rolling; Flat rolling and its analysis; Flat rolling defects; Rolling mills; Lab objective; Equipment; Lab Procedure , After rolling, percentage spread can be calculated as follows: , The torque in rolling can be estimated by:

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4 DC MOTORS

large motor applications include elevators, electric trains, hoists, and heavy metal rolling mills Examples of small motor applications include motors used in automobiles, robots, hand power tools and food blenders Micro-machines are electric machines , Note: Torque T is a function of force and the distance, equation (2) lumps all the constant parameters (eg length, area and distance) in constant K

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Technical Report - NSK

74 Empirical equations for running torque of tapered roller bearings ,,,, 168 , 1310 Sealed clean bearings for rolling mill roll neck , , equation for the outside diameter equals , This basic dynamic load rating is calculated by an equation shown in Table 1 The equation is based on the theory of G Lundberg & A

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Patent US3787667 - Computer controlled metal rolling mill - Google ,

A computer controlled cold metal rolling mill is described wherein force and power curves stored within a calculated set-up , the required torque for drive rolls RDl-RDS to move strip ST longitudinally within the mill at a predetermined speed

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Proposal to Develop Enterprise Roll Pass Software (2) Mill Load

For example, if a mill rolls 30 sizes with 26 stands, then one calculation provides up to 30x26=780 sets of power and load , Metal Pass LLC has a complete set of rolling process models to accurately calculate roll separating force, torque and.

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a critical review of the mechanics of metal rolling - Spectrum ,

, practical use, in the design of rolling mills, it is necessary for a theory , and torque 261 Calculation of rolling load in hot rolling 262 Calculation of torque in hot rolling CHAPTER 3 THEORIES , 4-2 Case study: Comparison of Calculated

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PDF FullText

ing furnace and rolling mill were developed with the aim , required, because these material sizes are calculated by , Rolling torque observer Fig ll Block diagram for impact drop compensation Revolution Fig 12 Impact drop without.

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Wicon Rolling Library for billet, bar and rod mills - Danieli Automation

for making the necessary calculations and simulations of the process parameters in a rolling mill Customers require easy testing and checking , The roll revolution n is calculated from the exit , Torques and Power) calculated by the WICON

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Journal of the Brazilian Society of Mechanical Sciences and ,

The single stand rolling mill governing equation is a non-linear function on several parameters (input thickness, front , In the previous section three possible control parameters were calculated to restore the variations in the output thickness , There are several theoretical models to calculate rolling load and rolling torque

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Calculation Method of Loads on Skew Roll Mill for Web Expansion ,

The calculation method of loads on the new beam rolling mill "Skew Roll Mill (SKM)" is proposed in order to select adequate rolling conditions for the web , The rolling torque can be calculated by use of the radial force and the thrust force

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a basic understanding of the mechanics of rolling mill rolls

Stresses from Hertzian pressure in 4-high cold mill back up rolls were measured years ago, the results were never published, , HISTORICAL DEVELOPMENT OF ROLLING MILLS ,, in rolls caused by design limits for maximum separation force, torque, Hertzian pressure etc, but these criteria are valid , Problems of this kind can never really be calculated but they have a detrimental effect on all rolling.

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The Calculation of Roll Force and Torque in Hot Rollina Mills

Equations are derived for the normal roll pressure, specific roll load and torque in hot rolling mills, using the condition for plastic , There is close agreement between the calculated and measured roll loads, but the roll torque is over-estimated.

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A comparison of two set-up generation systems for cold rolling mills

drives, stand reductions, roll forces and interstand tensions for the tandem cold mill control system Set-up optimization , Prior to rolling, set-up is calculated based on expected steady-state mill behaviour , The roll torque G is expressed by

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SHAFT COUPLING GLOSSARY,Do It the Wright Way ,

Torque The force required to turn a shaft multiplied by the radius at which the force is applied Torque is calculated by the , for in that comes from large synchronous electric motors or from the driven equipment side in steel rolling mills

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How to Calculate Load Torque & Motor Power - bulk-online Forums

There is no short cut for deciding the load torque This cannot be calculated from motor side 5) Having decided the load torque, you can decide the required power at motor shaft, available motor size, gear ratio and so on

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UBC Rolling Bearing Basic Load Rating Rolling Bearing equivalent ,

Though the radial load or axial load on bearing can be calculated by common mechanical method, but the actual load to , Intensity vibration or shock Rolling mill, Muller, Architecture machine, Vibration screen 2-0-3-0 , Compared with sliding bearing, the friction torque of the rolling bearing can be calculated according to

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PDF Download

then the calculating formula for casting rolling torque is derived In addition, considering , appendant torque of rotary junction s sealing ring, the calculating model which accords with casting rolling condition is found out , The idling torque is calculated from the weight , that in the driving mechanism of casting rolling mill

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Torque and Power measurements - VeriSTAR

The mean value is calculated from a number of tests on "bases" relating to sea conditions, at constant rpm , torques during engine engagement or disengagement, attached alternator coupling, rolling mill coupling in industrial installations)

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Nonlinear torsional vibration dynamics of rolling mill's , - IEEE Xplore

The amplitude-frequency characteristic equation and bifurcation response equation are obtained by solving the , The example analysis was carried out on the 1780 rolling mill of Chengde Steel Group It is shown that the increase of motor's disturbance torque will aggravate the vibration of rolling mill's drive system; the.

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rolling Mill Analysis Software - Hatch IAS

mills The software is suitable for tandem or single stand mills engaged in hot, cold, temper and foil rolling Most modules are , match the measured behaviour of a particular rolling mill Measured force, torque and strip temperature are compared with values predicted by the model allowing , Stresses in metal coils (steel, aluminum, brass, etc) during cold rolling and finishing operations are calculated

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Load Analysis of Rolls in a Rolling Mill: A Comparison of , - IRD India

Abstract- Failure and breakage of rolls in rolling mills is one of the , The load calculated from the strain indicator was found to be , Wang Albert, and M Shoup Jeffrey[4] used the real time torque measurement on a single stand reversing mill

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Full Text PDF

and variations of normal force and torque exerted by rolls are calculated and discussed A special emphasis is , example for bending a rolled sheet on the last mill in a sequen- tial rolling, directly before a coiling operation The calculated

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Mathematical Model for the Thin Strip Cold Rolling and , - J-Stage

for example, Jortner et al,1) Grimble et al2) These models gave some , The model was installed in the setup computer of a temper rolling mill to make parallel setup calcu- lations , roll force, P, and torque, T, can be calculated through inte-

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Brushed DC electric motor - Wikipedia, the free encyclopedia

Brushed motors continue to be used for electrical propulsion, cranes, paper machines and steel rolling mills , 51 Basic DC motor equations; 52 Counter emf equation; 53 Voltage balance equation; 54 Torque equation; 55 Speed equation , This is the same EMF that is produced when the motor is used as a generator (for example when an electrical load, such as a light bulb, is placed across the.

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20 Mechanics of Cold Rolling of Thin Strip - InTech

mill set-up and for on-line control, have become a key issue in the steel rolling process One major part of , rolling force and torque, and the strip plastic deformation such as the strip shape and profile , caused by an arbitrary load distribution along the beam can be calculated by the following equation, ( )

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Toward a heuristic optimum design of rolling , - Research Online

rolling mills Abstract Scheduling for tandem cold mills refers to the determination of inter-stand gauges, tensions and speeds of a specified , ductions, tensions, rolling forces, roll torque, mill , calculated from the Bland±Ford forward slip for-

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ON THE MODELING OF ROLLING: A SPECIAL LOOK AT EDGE ,

finite element analysis to calculate the rolling torque, the material flow within the region, distribution of stress, roll ,, example, laboratory rolling mills are usually much smaller than the ones used in industry, therefore the work pieces are.

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