Load Roll Torque Mill

Motor torque load torque and selection of motors

requirement when the load characteristics are known or as in NEMA class C or as the manufacturer s own practice when the starting torque requirement exceeds 150% of the full load torque FLT The likely applications for a high starting torque may be induced draught fans blowers coal crushers mill motors and coal conveyor motors

Get Price

THE MECHANICS OF TENSION CONTROL

Torque required to provide a certain level of tension to a web is total tension measured across the web times roll radius This means the torque driving the unwind shaft must decrease at a linear ratio relative to roll diameter as an unwind roll decreases in size through a machine run to keep tension constant Conversely the torque driving the

Get Price

THE MECHANICS OF TENSION CONTROL

Torque required to provide a certain level of tension to a web is total tension measured across the web times roll radius This means the torque driving the unwind shaft must decrease at a linear ratio relative to roll diameter as an unwind roll decreases in size through a machine run to keep tension constant Conversely the torque driving the

Get Price

[Solved] The load characteristics of rolling mill

· Pulsating loads The load on the motor which can be viewed as constant torque superimposed by pulsations Impact loads The load characteristics of rolling mill fluctuate widely within short intervals of time Download Question With Solution PDF ›› Share with friends ‹‹ Previous Ques Next Ques ›› More Electric Drives Questions Q1 Which motor has to start with high

Get Price

MOTOR/DRIVE SELECTION LOAD

The rolling mill would call for a regenerative or drive with tacho or encoder feedback while the fan could quite happily manage with a cheaper open loop inverter fed induction motor drive or even perhaps a simple voltage controlled induction motor Although loads can vary enormously it is customary to classify them into two major categories referred to as constant torque

Get Price

Motor torque load torque and selection of motors

requirement when the load characteristics are known or as in NEMA class C or as the manufacturer s own practice when the starting torque requirement exceeds 150% of the full load torque FLT The likely applications for a high starting torque may be induced draught fans blowers coal crushers mill motors and coal conveyor motors

Get Price

Basics of Web Tension Control Summary

different methods of control be it either speed or torque Lastly we will explore the different types of tension systems including 1 = Nip roll velocity E = Elasticity of the material A = Cross sectional area of the material The larger the elasticity E the less likely the material is to stretch For most values of EA use TORQUE CONTROL For stretchy material where E is small speed

Get Price

Understanding Rolling Process in Long Product

· Calculation of roll force is important because calculation of torque and power in a rolling mill is based on calculation of roll force Accurate prediction of roll force for grooved rolling is considerably more difficult than predicting the geometry of the rolling stock There are essentially three problems present during the rolling as well but somewhat easy to handle They are i

Get Price

FAILURE ANALYSIS GEARS SHAFTS BEARINGS SEALS

TYPICAL TORQUE IN STEEL MILL DRIVE FLUCTUATING LOAD TWO CYLINDER GAS COMPRESSOR ORQUE ZERO TORQUE TIME FAILURE ANALYSIS GEARS SHAFTS BEARINGS SEALS Vibratory loads or system dynamic loads depend on the interrelation of the components in the entire system with one another and torquemeter readings or a study of the system is required to assess instantaneous loads

Get Price

The calculation of rolling force Innoval

This is because you need it to set the appropriate roll gap on the mill accounting for the stretch of the stand The prediction of rolling force can be challenging due to the large number of inter connected process variables involved However many years of experience working with rolling mills has allowed us to create the Innoval Rolling Model which gives accurate rolling force predictions

Get Price

Motor Sizing Basics Part 1 Load Torque

To calculate load torque multiply the force F by the distance away from the rotational axis which is the radius of the pulley r If the mass of the load blue box is 20 Newtons and the radius of the pulley is 5 cm away then the required torque for the application is 20 N x m = 1 Nm Typically a safety factor is used so that the

Get Price

Load Analysis and Driven Power Calculation

The lower roller drive torque T equals the sum of the deformation torque T n1 and the friction torque T n2 Lower roller driven power Lower roller driven power is In the above formula P Driven power m • KW T Driven force moment KN • m n 2 Lower roller rotation speed r • min 1 n 2 =2V/d 2 V is rolling speed

Get Price

Method of load calculation of electrical drives of

· During manufacturing of heavy strips and plates from difficult to form steel grades on sheet and wide strip rolling mills there is a problem of exact calculation of power parameters of rolling It is pointed out that known methods do not provide required precise information at high deformation zones in a stand An improved calculation method for rolling pressure and load torque of electrical

Get Price

RECOMMENDED ASSEMBLY TORQUES Steelmasters

RECOMMENDED ASSEMBLY TORQUES Class ISO Metric Coarse Pitch Bolts Screws Bolt Tension Recommended Corresponding to Assembly 65% of Proof Load Torque kN Nm To convert kN to lbf Multiply kN by To convert Nm to lbft Multiply Nm by 5 9 22 44 77 122

Get Price

Motor torque load torque and selection of motors

requirement when the load characteristics are known or as in NEMA class C or as the manufacturer s own practice when the starting torque requirement exceeds 150% of the full load torque FLT The likely applications for a high starting torque may be induced draught fans blowers coal crushers mill motors and coal conveyor motors

Get Price

Motor Sizing Basics Part 1 Load Torque

To calculate load torque multiply the force F by the distance away from the rotational axis which is the radius of the pulley r If the mass of the load blue box is 20 Newtons and the radius of the pulley is 5 cm away then the required torque for the application is 20 N x m = 1 Nm Typically a safety factor is used so that the

Get Price

Rolling processes الرئيسية

Torque required to drive each roll is given by Eq T = 1 27 4 10 3 = 19 786 N m And the power is obtained from Eq Power in Kw = = Kw We note that one horsepower = W → Power in hp = hp It can be seen from this example that large forces and power are required in rolling Inspection of Eqs and indicates that force and/or power

Get Price

Torque and power requirement for roller

· Torque and power requirement for roller We have roller setup which is to be driven by a motor The roller dia is 90 mm A shaft which is connected to its end is 25 mm of dia The roller weight is around 10 kg On the periphery of the roller there are some 40 kgs of mass is acting The roller

Get Price

MOTOR/DRIVE SELECTION LOAD

The rolling mill would call for a regenerative or drive with tacho or encoder feedback while the fan could quite happily manage with a cheaper open loop inverter fed induction motor drive or even perhaps a simple voltage controlled induction motor Although loads can vary enormously it is customary to classify them into two major categories referred to as constant torque

Get Price

Motor Torque Calculations NEPSI

In addition to the torque required to drive the load at a steady speed torque is required to accelerate the load Accelerating Torque for Motor Shafts Input Speed of Moving Part N RPM Input Speed of Driving Motor N M RPM Input Change in Speed Required dN RPM Input Time to Accelerate Total System t Sec Accelerating Torque T lbs ft Calculator 5 Known variables Weight

Get Price

Experimental and computational investigation of the roll

Lindgren Experimental Investigation of Roll Load and Roll Torque when High Strength Steel is Roll Formed Journal of Materials Process ing Technology 191 2007 44 47 5 M Lindgren Validation of Finite Element Model of Roll Forming Pre sented at international deep drawing research group Olofstr¨om Sweden June 2008 6 M Lindgren U Bexell ¨om Roll Forming of Partially

Get Price

TECHNICAL NOTES 8 GRINDING R P King

autogenous mills A simplified picture of the mill load is shown in Figure Ad this can be used to establish the essential features of a model for mill power The torque required to turn the mill is given by Torque T Mcgdc T f Where Mc is the total mass of the charge in the mill and Tf is the torque required to overcome friction Power

Get Price

[Solved] The load characteristics of rolling mill

· Pulsating loads The load on the motor which can be viewed as constant torque superimposed by pulsations Impact loads The load characteristics of rolling mill fluctuate widely within short intervals of time Download Question With Solution PDF ›› Share with friends ‹‹ Previous Ques Next Ques ›› More Electric Drives Questions Q1 Which motor has to start with high

Get Price