Flat Rolling Process, The objectives here are similar to those above: that of the calculation of the roll separating force and the roll torque The models can also be used to estimate the dimensions of some components of the rolling mill, such as the cross-sectional areas of the load carrying columns of the mill frame, the dimensions of the bearings, the drive ,Plant Engineering | Relationship of torque and shaft size, Apr 13, 2015· Torque (lb-ft) = hp x 5,252/rpm Accordingly, an increase in horsepower would require more torque, as would a decrease in rpm For example, a 100 hp motor designed for 900 rpm would require twice as much torque as a 100 hp motor designed for 1,800 rpm Each shaft must be sized for the torsional load it is expected to carryTaper Tension for Rewind Control: Definitions & Processes ,, Taper Tension for Rewind Control Posted by Bryon Williams & filed under Article Library, Technical Papers Center winding film or other extensible material comes with inherent difficulti If you maintain a constant tension on the web, as the diameter of the roll increases, the wraps become tighterUS7059163B2, The invention relates to a roll stand comprising a crown-variable-control (CVC) roll pair, preferably a CVC working roll pair and a back-up roll pair, which comprise a contact area (B cont) in which a horizontally active torque (M) acts that leads to a twisting of the rolls and thus to axial forces in the roll bearings In order to keep the axial forces in the roll bearings as small as ,Paper # 25, speed When zero speed is reached, the mill has stopped but the torque is still at a high level because of the unbalanced mill charge Then the drive system starts slowly in the reverse direction to roll back the mill until no torque is remaining in the system During this time, the ,.
Technical Note No31 CAPACITY SELECTION II [CALCULATION ,, Calculate the required power and the load torque, and select a motor capacity that can be driven by the required power or higher When selecting, also check that the rated motor torque is equal to or higher than the load torque Required power : P LR = ×η × 6120 W V max [kW] Load torque : T LR = Nmax ×9550 P LR [Nm] Selected motor ,Weight Transfer: how it works and how to use it in setup, Jun 09, 2015· The term between brackets in the equation above is the roll rate distribution or roll stiffness distribution for a given axle, and it will ultimately control the elastic lateral load transfer component Elastic and Kinematic Components Combined So far, we have discussed the influence of each component in lateral load transfer in isolationMotor Torque Calculations, Known variables: Weight (lbs), Diameter (ft), Change in Speed (RPM), and Time to accelerate Total System (sec) In addition to the torque required to drive the load at a steady speed, torque is required to accelerate the loadSolved: B1) A Plate (20mm Thick, 200 Mm Wide) Is Rolled To ,, Given: Roll radius = 250 mm and rotational speed = 12 rev/min The work material has a strength coefficient = 600 MPa and a strain exponent = 022 a) Sketch the operation and show any motion with arrow(s) b) Determine roll force, roll torque, and power required for two rollers12 ROLLING, TORQUE AND ANGULAR MOMENTUM, Torque defined in this way has meaning only with respect to a specified origin The direction of the torque is always at right angles to the plane formed by the vectors r and F The torque is zero if r = 0 m, F = 0 N or r is parallel or anti-parallel to F 124 Angular Momentum.
Roll Torque, The surface finish of the rolls was obtained by sand blasting The mill is driven by a 15 kW constant torque, DC motor The two drive spindles contain the torque transducers to measure roll torque while the roll separating forces are monitored by two force transducers, located over the bearing blocks of the top work roll A tube type furnace is ,Rolling Mill Horsepower Calculation, expression for roll load roll torque mill horsepower The performance of the rolling mill depends on the Universa , for calculation of roll force and torque 34 Chapter 8 , or the roll horsepower ,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 theRolling (metalworking), Roll changing devices - use of an overhead crane and a unit designed to attach to the neck of the roll to be removed from or inserted into the mill Mill protection devices - to ensure that forces applied to the backup roll chocks are not of such a magnitude to fracture the roll necks or damage the mill housing; Roll cooling and lubrication systemsGrotnes Rotary Roll Forming Machine, Maximum input torque continuous per spindle 1,000 inch lbs 1,800 inch lbs 4,800 inch lbs 6,500 inch lbs 25,000 inch lbs Spindle RPH HP per spindle 480 RPM/ 7Y2 HP 400 RP,M 110 HP 400 RPM /30 HP 500 RPM/ 50 HP 150 RPM /60 HP Maximum roll space: Diameter 3" ,.
Torque (article) | Khan Academy, Learn how to find the torque exerted by a force Google Classroom Facebook Twitter Email Torque, moments, and angular momentum Introduction to torque Moments Moments (part 2) Finding torque for angled forc Torque This is the currently selected item Rotational version of Newton's second lawA BASIC UNDERSTANDING OF THE MECHANICS OF ,, After a roll change or a mill stop rolls need some time to return to stable thermal conditions, every new bar entering the mill creates an impact, , and sometimes there are really severe rolling accidents, due to faults by operators, weak rolled materials with internal defects, or becauseRoll pass design, Jan 08, 2014· Design a new product to roll on an existing mill Creating the rolling plan, calculating the power and roll loads, and analyzing the suitability of the equipment to provide the necessary power and torque and withstand the rolling loads Extend the size range of products already rolled on an existing millTorque and power requirement for roller | Physics Forums, Sep 14, 2014· Over the roller, a fabric in a roll form is loaded The fabric roll sits over this roller by means of gravity The roller has to drive the fabric roll on its circumference & feed the fabric end to another machine Problem: 1 What is the torque required to drive the roller at the shaft end 2Basics of Web Tension Control Summary, 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 control can approach being as good as torque control.
Engineering Data, HP = TORQUE x RPM or TORQUE = 63,025 x HP 63,025 RPM TORQUE = 63,025 x 1/12 = 5,252 In Lbs 1 Therefore, motors for use with large reductions should be carefully selected Even a small motor, if stalled, can produce enough Torque to ruin the drive, unless ,Axial Thread Rolling For CNC Lathe Users | Modern Machine Shop, Horsepower--In general, if the roll threading head can fit on the machine, there's enough horsepower Where it is still questionable, a formula has been developed that can provide a minimum horsepower estimate It's based on our ½-13 example using 4140 steel (28-34 Rc): (1037 × 10-6) × T × P × D × S = horsepower Where: Constant = (1037 ,US3683653A, 1 A drive system for a rolling mill comprising a pair of engaging working rolls having an interface through which a strip to be rolled passes, and a pair of backup rolls, each backup roll engaging its associated working roll on opposite sides of said interface and being rotatably driven with the working roll, said system comprising: a a pair of motors for driving the working and backup rolls ,Roll force, torque, lever arm coefficient, and strain ,, 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 edge rolling has been carried out, and in the present ar-ticle, models for roll force, torque, and lever arm coefficient are derived using the upper bound method A simple, kinematically admissible deformation zone and velocity field ,Rotation: Moment of Inertia and Torque, Torque and Newton's Second Law for Rotation Torque, also known as the moment of force, is the rotational analog of force This word originates from the Latin word torquere meaning "to twist" In the same way that a force is necessary to change a particle or object's state of motion, a torque ,.
Experimental investigations of the roll load and roll ,, Fig 1 A standard roll forming mill is used to do experiments, the roll load is measured with load cells and the roll torque is measured with a torque sensor during a forming of different steels Table 1 The materials that have been tested are Docol, DC01 (carbon steel) and HyTens, SS2333 (stainless steel) Material Thickness (mm) RP02 (MPa ,Homework solutions for test 2, 4 121 The strength coefficient = 550 MPa and strain-hardening exponent = 022 for a certain metal During a forming operation, the final true strain that the metal experiences = 085Solved: A Hot Rolling Mill Has Rolls Of Diameter = 24 In ,, A hot rolling mill has rolls of diameter = 24 in It can exert a maximum force = 400,000 lb The mill has a maximum horsepower = 100 hp It is desired to reduce a 15 in thick plate by the maximum possible draft in one pass The starting plate is 10 in wideCalculation of Rolling Load and Torque in the Hot ,, Sep 01, 1962· This paper presents a completely new approach to the mechanics of the Sendzimir hot planetary rolling mill Previous work on this subject, by R Tovini, included determinations for the distribution of the advance of the strip, the draft, the rolling load, the torque and the horizontal backthrust for the whole range of positions which the planetary rolls made, whilst contacting the hot metalUnderstanding Conveyor Belt Calculations | Sparks Belting, Belt Load At one time when the load is known per square foot: P= G 1 x C(in feet)x W (in feet) At one time when load is known by pounds per hour: P=G 2 /(S x 60) x C(in feet) Horsepower Level Conveyors: HP=(F x S x (P+M))/33,000 Inclined Conveyors: HP=((P x B)+(P+M)x F x S)/33,000 Effective Tension Pull needed to move belt and load ,.
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