torque speed characteristics of rolling mills

  • torque speed characteristics of rolling mills

    torque speed characteristics of rolling mills. The Calculation of Roll Force and Torque in Hot Rolling Mills. Equations are derived for the normal roll pressure, specific roll load and torque in hot rolling mills, using the condition for plastic deformation in rolling derived by Orowan, together with von Kármán's equation of equilibrium.

  • CONTROL PROCESS FOR A COLD ROLLING MILL BY VIBRATIONS

    the torque and to measure the mill parameters as well (the force, the mill speed, the gap between work roll etc.). This system is a part of the integrated control process. Keywords: Cold rolling mill, torque, vibration, chatter, quality control, maintenance 1. INTRODUCTION

  • Rolling mills slideshare.net

    20/07/2016· AC drive solution for each type of rolling mill application, ranging from large torque, slow-speed rolling mills to the high-speed, wide tension range rolling mills 6. Induction motors: Squirrel cage rotor induction motor o are suitable for medium power applications o Extremely robust construction o High flexibility o Excellent torque characteristics, o especially for ultra low speed rolling

  • TORQUE–SPEED CHARACTERISTICS electric equipment

    6/01/2016· LOAD REQUIREMENTS TORQUE–SPEED CHARACTERISTICS. The most important things we need to know about the load are the steady-state torque–speed characteristic, and the effective inertia as seen by the motor. In addition, we clearly need to know what perform- ance is required. At one extreme, for example, in a steel-rolling mill, it may be

  • Dynamic characteristics of a rolling mill drive system

    From Eq.(11) in Section 3, it is known that the torque amplification factor (TAF) is a function of the normal rolling force and the rolling speed.Assuming the rolling speeds to be 10, 20, 30, 40, 50, 60 and 70 rpm, respectively, the relationship between two stations of the normal rolling force and the torque amplification factors as shown in Fig. 7 are obtained.

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  • Motors for Metal Rolling Mills TMEIC

    AC adjustable speed motor drive systems are the preferred technology for new rolling mill installations and modernization projects. TMEIC designs and manufactures two types of AC solutions for this purpose. Salient pole synchronous motors that meet the high power and torque demands of a hot strip mill, as well as roughing and finishing stands.

  • Universal motor Wikipedia

    The universal motor is a type of electric motor that can operate on either AC or DC power and uses an electromagnet as its stator to create its magnetic field. It is a commutated series-wound motor where the stator's field coils are connected in series with the rotor windings through a commutator.It is often referred to as an AC series motor. The universal motor is very similar to a DC series

  • Characteristics of DC motors electricaleasy

    Generally, three characteristic curves are considered important for DC motors which are, (i) Torque vs. armature current, (ii) Speed vs. armature current and (iii) Speed vs. torque. These are explained below for each type of DC motor.These characteristics are determined by

  • torque speed characteristics of vertical raw mill

    (ARM) like slag, coal, foundry sand used in cement industry, ball mill, vertical roller mill for cement production. torque speed characteristics of machine Get Quote Kiln Drive Application Considerations Ias Article

  • Rolling processes Al-Mustansiriya University

    Rolling processes 5-1 introduction: Rolling is the process of reducing the thickness or changing the cross section of a long workpiece by compressive forces applied through a set of rolls, as shown in figure (5-1). Fig. (5-1) Most rolling is carried out by hot working, called hot rolling, owing to the large amount of deformation required. Hot-rolled metal is generally free of residual stresses

  • Motors for Metal Rolling Mills TMEIC

    AC adjustable speed motor drive systems are the preferred technology for new rolling mill installations and modernization projects. TMEIC designs and manufactures two types of AC solutions for this purpose. Salient pole synchronous motors that meet the high power and torque demands of a hot strip mill, as well as roughing and finishing stands.

  • Universal motor Wikipedia

    The universal motor is a type of electric motor that can operate on either AC or DC power and uses an electromagnet as its stator to create its magnetic field. It is a commutated series-wound motor where the stator's field coils are connected in series with the rotor windings through a commutator.It is often referred to as an AC series motor. The universal motor is very similar to a DC series

  • Types of Steel Rolling Mills Reversing Hot Continuous Hot

    18/05/2018· Continuous Cold Rolling Mills. These work only in the forward direction and no reversing is required. The metal passes in one direction only in different stands till the product has the required thickness, The mill may be two high or four high. The coiler roller requires accurate torque and speed control. The strip tension must be constant and

  • torque speed characteristics of vertical raw mill

    torque speed characteristics of vertical raw mill-[crusher. The Deswik TM mill is a new development of the vertical stirred mill type especially designed for ultra fine grinding. Depending on the conditions the mill can grind torque speed characteristics of vertical raw mill-[crusher Read more

  • ABB DRIVES AND CONTROL SYSTEM FOR HOT FLAT ROLLING MILLS

    When the slab enters into the rolling mill the actual speed of the work rolls drops, because the speed controller needs time to build up the torque reference. This behavior is referred to as impact speed drop [%s]. The higher dynamic settings of the speed controller the faster is the torque build-up time and the smaller is the impact speed drop.

  • Which one of these motors is used for rolling mills, a DC

    The starting torque of DC series motor is very high but limitation is it can not operate in no load condition because if it is operate on no load then due to high to it achieve very high speed and due to this it may damage the rotor. The starting

  • Applications of DC Motor [ Series, Shunt & Compound Motor

    Application of DC Compound motor ⇒ By compound motor, we get high starting torque and nearly constant speed. Because of that Compound motors are used where we require high starting torque and constant speed. ⇒ A compound motor is used in Presses, Shears, Conveyors, Elevators, Rolling Mills, Heavy Planners, etc. Why D.C motors are used?

  • REDUCERS FOR MAIN DRIVES ОF ROLLING MILLS

    rolling mills is equipped with various special gearboxes used in the main drive as well as in the accessories. The traditional scheme of any rolling mill drive includes a main reducer, which provides the required gear ratio between the motor and the working stand, and pinion stand for distributing the transmitted torque between the rollers of the working stand [1-3]. The universal or gear

  • Large AC Adjustable Speed Motors for Metals Rolling Mills

    Large AC Adjustable Speed Motors for Metals Rolling Millsdd 4 10/24/2011 4:20:47 PM 5 The stator is a fabricated, welded steel plate structure of high rigidity, strongly resistant

  • DC Motor Characteristics your electrical guide

    Speed Torque Characteristics (N v/s T) Since a series motor develops high starting torques at low speeds and low torque at high speeds, therefore, speed torque characteristics of a DC series motor is a hyperbola. High starting torque enables, even a small series motor to start a heavy load. Application of DC Series Motor

  • Large AC Adjustable Speed Motors for Metals Rolling Mills

    Large AC Adjustable Speed Motors for Metals Rolling Millsdd 4 10/24/2011 4:20:47 PM 5 The stator is a fabricated, welded steel plate structure of high rigidity, strongly resistant

  • POWER IN ROLLING

    Torque and Power in Cold Rolling *Power is applied to the rolling mill by applying Torque to the rolls and by using roll strip tension.*The total rolling load is distributed over the arc of contact. *However, the total rolling load can be assumed to be concentrated at a point along the arc of

  • torque caracteristic of ball mill

    Torque Speed Characteristics Of Vertical Raw Mill pimes . 3. Ball mill and motor 3 3.1 Ball mill load characteristics 3.2 Motor torque defined 3.3 Differentiating characteristics 3.4 Synchronous motor 3.5 Slip ring induction motor 3.6 Torque, efficiency and power factor 3.7 Motor torque pulsations 3.8 Construction and ventilation requirements 4.

  • The Study of Continuous Rolling Mill Inter-stand Tension

    The inter-stand tension inferential control systems are used to stabilize the rolling motor torque. To stabilize the motor torque the electric drive system with the properties of the rolling motor torque supply may also be used. An alternate option may include torque stabilization by to the effect on speed of the previous, further or controlled

  • Motors for hot rolling mill solutions by Bascotecnia Steel

    Special and custom-made motors for hot rolling mills are manufactured by our subsidiary INDAR. The motors required for the Steel industry, are machines incorporated with high torque and variable speed characteristics. With this purpose in mind the manufacturing program includes: Low speed synchronous motors: controlled by cycloconverter- fed units.

  • Rolling conditions in hot strip mills and their influence

    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 schedule and dimensions of the mill (strip reduction, roll diameter etc.). These variables allow to

  • Maintenance for productivity Rolling models

    tension, speed Roll force, torque, temperature CVC, HS, position bending Coil-data Operator-trims Scheduling 400 350 300 250 200 150 100 50 0 0 0.5 1 1.5 2 Log deformation Yield stress 3542 Rolling mill applications covered by ABB include: Single and multistand Mills Cluster and Sendzimir*) Mills Inline and continuous rolling mills Reversing

  • TORQUE AND TORSIONAL VIBRATION MEASUREMENTS

    TAF is the torque amplification factor and is the ratio between break-away torque and torque in steady state conditions. It is used to judge design improvements to the extension shafts of a rolling mill. The objective was to determine whether the new hollow ex- tension design was better than its solid predecessor. The data acquisition campaign

  • Expression For Roll Load Roll Torque Mill Horsepower

    Calculation Of Torque On Grain Mill ilcapriccio-falisollecalculation of torque for ball mill,2015 ball mill speed The Calculation of Roll Force and T Jaw Crusher The Jaw crusher is used for Primary crushers and Secondary crushers for crushing all kinds of minerals and rocks with compressive strength less than 320 mpa.

  • How are high starting torques obtained in a squirrel cage

    Starting torque of IM can be increased by using external rotor Resistance at starting, but in case of squirrel cage motor, adding external Resistance to rotor circuit is not Possible. High starting torque in squirrel cage IM is obtained by using D...

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