calculation of speed of roll in stretch reducing mill

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calculation of speed of roll in stretch reducing mill

An investigation on the roll force and torque…

hot-rolled aluminum strip can be reduced, it will be possible to increase thepasses, speed of rolling, and interface friction (Ford & Alexander,; Sims,).analysis method to match the calculated rolling force and torque with theof the product, the mill stretch and vibrations of the rolling mill, and roll flattening.

investigation for sheet width and thickness during pipe…

Key words: steel pipe, anisotropic elastic properties, rolling mill, strip thicknessequation for calculating the permissible operating . Figureshows the stretch bend test when a sheet of . has been found that lower thickness reduction with thinspeed of rolling mill line and the welding technique are. calculation of speed of roll in stretch reducing mill

Hot Rolling Mill Hydraulic Gap Control (HGC) thickness…

rolling speed dependent, adaptive PI controller is developed to accomplish fine thickness control.As the strip passes between the work rolls, the thickness is reduced.measured HGC pressure and can be used to calculate the mill stretch.

An Expert PI Controller with Dead Time Compensation of Monitor…

This reduction in thickness is achieved by passing the piece through a series of rolling mill stands.As shown in Figure, the rolling mill produces steel strip at a speed ofThen the gap correction value of monitor AGC is calculated. .. or stiffness coefficient and is the approximate value of mill stretch.

Hot rolling and rolling defectsnptel

calculation of speed of roll in stretch reducing mill force, we can reduce roll diameter, or reducing the friction.Time can be writtenas : L/V, where V is velocity of roll, L is projected arc length.From flow curve we can determine the flow stress for the corresponding strain rate. p . Mill spring is a defect in which the rolled sheet is thicker than the required thickness because,.

diminishment of internal polygonization of tubes in hot…

drives of stretch reducing mill systems with the widest diameter range of rolledroll is smaller than the metal velocity and one where the line velocity of roll is. The method of tube measurement for calculation of internal polygonization P calculation of speed of roll in stretch reducing mill

Journal Paper Format

Aluminum cold rolling is a rolling process to reduce the thickness with a furtherthickness and tension are strongly affected by rolling speed, thickness increasingwhere S is the unloaded roll gap, and the term f(P) is the mill stretch. . GM-AGC uses the gaugemeter equation to estimate exit strip thickness at each stand.

ABB in MetalsABB Group

metals, profile mills, tube and pipe mills, hot flat mills, tandem cold mills, cold rolling mills, processing lines as well as metallurgy products. . Sizing and stretch reducing mills. Welded tubes andfor setup calculation, technological controlstension, speed and position to very high accuracy and coordination of up to

Understanding Rolling Process in Long Product…

The cross section area is reduced in each pass and form and the size of theA long product rolling mill comprised of equipment for reheating, rolling and cooling. . High tension can stretch reduce the cross section of the bar making shapeThe bar speed at each stand is calculated using the production

Stretch reduction of seamless steel tube by skew…

The roll deflection angle is calculated, and the expression of roller-grooveKey words: Stretch reduction by skew rolling / hexagonal bore

Speed Matching at a Paper MillPolytec…

Speed Matching at a Paper Mill www.polytec.comswitching from one paper roll to another by joiningspeeds, speed matching of the parent reel to theA significant reduction in sheet breaks has clearlyat the time of splicing, was calculated based on thisDifferential sheet speed for stretch or draw. calculation of speed of roll in stretch reducing mill

Energy Balance in the Rolling of OCTG on a…

calculation of speed of roll in stretch reducing mill Energy Balance in the Rolling of OCTG on a Stretch-Reducing Milldetermining the lead and lag zones in tube reduction, and a relation is . where l is the length of the deformation zone; n is the speed of rotation of the rolls;

An investigation on the roll force and torque…

Arnold and Whitton inproposed a formula for roll-separating force based .. of the product, the mill stretch and vibrations of the rolling mill, and roll . The amounts of reduction and rolling speed are.4% andrpm,

Tandem cold rolling mill modeling for multi-variable…

Abstract: A tandem cold rolling mill permits to reduce the thickness of a steel strip while ensuringof the strip with variable speed from one stand to the consecutive one implies the . force-mill stretch characteristics exhibiting a non-linear partapproximation is given to estimate the strip exit thickness in.

soft starting arrangements availables for hot rolling…

The energy conservation in these rolling mills can be achieved . motor for determining the actual speed of the motor and means coupled to said armature.

Understanding Rolling Process in Long Product…

A long product rolling mill comprised of equipment for reheating, rolling and cooling. . High tension can stretch reduce the cross section of the bar makingThe bar speed at each stand is calculated using the production

A study on seamless tube in the planetary rolling…

Keywords: Planetary rolling process; Finite element; Upper bound; Dual-stream functions..sizing or stretch-reducing mill in tube production forms one. calculation of speed of roll in stretch reducing mill

Rolling Mill ControlRussula

Long product rolling automation is a challenge due to its high speeds anduses the reduction concept (R-Factor) to calculate the mill cascade speed reference.

perfection of processes of seamless steel tubes…

stretch-reducing mills. Just due to the use of sink rolling as a final hot working step, continuous full-floating mandrel longitudinal rolling mills

Steel

Modular PLCs communicating with each other on high-speed bus.Bar & Wire Rod Mills. Continuous rolling Mill automation from Furnace output to finished product.Dynamic length computation and Shear Control. TMT process Control andTension controlled Stretch Reducing mill with cascade control. Thickened end

MATHEMATICAL AND PHYSICAL MODELING OF FLAT…

Reduce thickness to a pre-determinedFinishing and Roughening mills. ◦ Roll separating . Roll separating force is the main goal in calculations in N/mmThe friction factor could be determined in terms of load and speed;.

Patent USComputer controlled metal rolling…

Also disclosed is the storage of mill stretch curves as functions of roll forceand operation of the mill to determine such factors as the optimum speed for each stand,rolling stands RSI-RSarranged in tandem for incrementally reducing&#;the calculation of speed of roll in stretch reducing mill

seamless tube plantsSMS group

structural profiles, wheels for high-speed trains or aluminium for .. for the working rolls. Finish-rolling in a stretch-reducing or sizing mill. calculation of speed of roll in stretch reducing mill

Steel Tube and Pipe Manufacturing ProcessMannesmannröhren…

in opposite directions and the stock exit speed approximated to the roll .. train, with the downstream stretch-reducing mill finish-rolling them down – sometimes

TAM PlusTenaris

mill. Tenaris presents a new, highly machinable product. TAM® Plusstretch reducing millentire length of the tube, during the hot rollingCutting speed . **The impact test values indicated are meant to be calculated as the average of

TheStand Tandem Cold Reduction MillCalifornia Steel…

CSI&#;s cold reduction mill is a series of five rolling mills, orrequired of each mill stand determine how much load will be placed on eachThestand is operated at very high strip tension, approaching what could stretch or tear the steel, in order toA complex system of position-, force-, speed-, and current-measurement

Rolling of metals

calculation of speed of roll in stretch reducing mill understanding of load calculation in rolling processes. . The overall reduction is the summation of a series of small reductions . high speed mill to produce steel ofMild shape problems may be corrected by stretch levelling the sheet in

Friction at strip-roll interface in cold rolling…

determines the reduction of strip being rolled, the rolling mill stretch and finalunder different reduction, rolling speed, surface roughness, material property andThe measured friction coefficient was used in the calculation of rolling force

Automatic Control of Functional Parameters to an…

This paper shows the method of speeds determination and the basic automation of the stretch-rolling mill.Problem Formulation..Speed control.

Modeling, simulation and identification for control of tandem…

Keywords: rolling mill control, tandem cold rolling, processdependents of the operating conditions and the rolling mill speed.The SIM do not require the use of any initial parameter estimate, and theA linear approximation for the mill stretch of the rolling stand is used for estimates of output thickness,.