Adaptive models for roll force, torque, forward slip, roll and strip temperature, thermal crown, mill stand module, roll bending and wear, are used to predict the expected process behavior in all phases of rolling and secure optimal setup values. More than 200 setpoints and control parameters are preset by the model for each coil.
understanding journal bearings and is integral to bearing design and appliion. Since they have significant damping fluid film journal bearings have a strong impact on the vibration characteristics of machinery. The types of machinery we are concerned with
The starting torque of a rolling bearing is defined as the frictional moment that must be overcome by the bearing to start rotating, at an ambient temperature of 20 to 30 °C (70 to 85 °F). Therefore, only the sliding frictional moment and the frictional moment of seals, if applied, are taken into consideration. M start = M sl + M seal where
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MOTOR FORMULAS AND CALCULATIONS: The formulas and calculations which appear below should be used for estimating purposes only. It is the responsibility of the customer to specify the required motor Hp, Torque and accelerating time for his appliion.
POWER IN 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 point along the arc of contact ata distance ''a'' from the line of centers of the rolls.
Motor torque, load torque and selection of motors 2/43 2.1 Motor speed–torque curve Refer to Figure 2.1 where T st = starting torque or breakaway torque. T m = minimum, pullin or pullup torque. T po = pullout, breakdown or maximum torque, obtainable over the entire speed range.
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
How to use automation to improve productivity and quality in your rolling mill. Automation directly impacts long product rolling mill productivity and product quality. This paper will discuss Russula''s latest technical developments in optimizing rolling mill control. This advanced optimization consists of an automatic calculation of the
An improved calculation method for rolling pressure and load torque of electrical drive engine is suggested further. This method considers peculiar strain of product in high deformation zones and
Plate Rolling Machine Operation Procedure and Method. Home check whether the rolling machine is in good condition after startup check whether the hydraulic system pressure is normal, the overturned side can be normally closed, when starting the machine the bottom roller of the plate rolls is under normal rotation, to ensure the system
Control Scheme Using Forward Slip for a Multistand Hot Strip Rolling Mill. Article the calculation accuracy are enhanced, and make the actual thickness more approximate to the target value.
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rolling mill startup torque calculation. 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 important process in hot rolling mills. Research in edge rolling has been carried out, and in the present article, models for roll force, torque
It depends on the accuracy of your assembly, sensor position, friction, alignment of the motor and generator axles etc. If you want to get meaningful numbers you might use a second generator kit as explained in Torque and Efficiency Calculation section. Speed, torque, power and efficiency of the motors are not constant values.
To reveal the rules of electromechanical coupling vibration of hydrogenerating set,torsional vibration characteristic of hydrogenerator rotor system under electromagnetic excitation were investigated.Considering the influence of distribution of salient pole on airgap
Finishing mill setup calculation Calculation of reduction rate, rolling load, rolling speed, strip temperature, and motor torque/power of each pass, etc. Finishing mill setup (Startup) Work roll/backup roll materials, roll diameter, initial crown, etc. Finishing mill
Asymmetric rolling is a severe plastic deformation technique that can refine grain size in sheet/foil materials. This technique has been used to improve the mechanical properties of products, . In the asymmetric rolling process, sheets are passed between rolls that either have different diameters, or rotate at different angular speeds.
Rolling mill startup torque calculation. The ratio λ aLp a√R∆t is used to calculate the moment arm ''a'' λ 05 for hot rolling and 045 for cold rolling The torque is equal to the product of total rolling load and the effective moment arm Since there are two work rolls Torque Mt 2Pa Consider two high roll mill as shown in
Learning calculation for crown and flatness model Finishing mill setup values Roll gap, roll speed, rolling load, torque, etc. + Setup values for CNP? roll shift positions and work roll bending forces Roll wear calculation Finishing mill setup (Note) q to r : Startup timing
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