### The Planetary Rolling MillMcMaster University

The Planetary Rolling Mill Lorn D Newton B.Sc Eng Dr G Kardos 1 8 Queens University at Kingston Ontario A survey was made of the available literature on Planetary Rolling and Planetary Rolling Mills From this a distillation of information was made which included a description of the mill and the material

Get Price### Calculation of Fusion Zone Size in the Submerged Arc

In the reconditioning of large rolling mill rolls with a smooth body D ≥ 750–800 mm L body ≥ 1600–1700 mm the amount of metal that is hardfaced reaches several tons and the hardfacing operation takes a considerable amount of time.The operation can be shortened by employing a highly productive method that entails submerged arc hardfacing with a strip electrode 1 2 .

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If a mill rolls 80 of the calendar year that is 365 x 24 x 0.80 = 7008 hours If the mill rolls 800 000 tons per year it runs at an average production rate of 114.16 tons/hour If the

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is 300 mm and the rolls rotate at 100 rpm Calculate the roll force and the power required For annealed copper it has a true stress of about 80 Mpa in the unstrained condition and at a true strain of 0.223 true stress is 280 Mpa FOUR HIGH ROLLING MILL PROBLEMS AND DEFECTS IN ROLLED PRODUCTS Porosity Cavity Blow Holes occurred in the

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The ratio λ = a/Lp = a/√R.∆t is used to calculate the moment arm a λ =0.5 for hot rolling and 0.45 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 = 2P.a Consider two high roll mill as shown in the figure.

Get Price### Principles and Applications of Metal Rolling

2.3.3 Formulae for calculation of mean rolling pressure 93 2.4 Rolling Torque and Power 98 2.4.1 Lever arm method 98 2.4.2 Rolling power calculation 101 3 Rolling Practices 104 3.1 Layout of Stands 105 3.1.1 Single stand 105 3.1.2 Multi stands side by side 105 3.1.3 Looping train 106 3.1.4 Two stand tandem mill 107

Get Price### Fundamental concept of metal rollingmtixtl

Fundamental concept of metal rolling 1 The arc of contact between the rolls and the metal is a part of a circle 2 Example Calculate the rolling load if steel sheet is hot rolled 30 from a 40 mm thick slab using a 900 mm diameter roll The slab is 760 mm wide.

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– Calculate roll separation force rolling force and torqueProcessing LimitsCalculate rolling power Prof Ramesh Singh Notes by Dr Singh Dr Colton 13 Flat Rolling Analysis Consider rolling of a flat plate in a 2 high rolling mill

Get Price### Mill loadroll force torque power during steel rolling

MILL LOADRoll Force Torque Power The Mill Load application is specifically developed for mill design/operation engineers to calculate roll separating force rolling torque and power etc Typically load calculation is needed for an existing mill when a new rolling process is applied either with higher reduction or in lower temperature or higher speed or for a stronger material.

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Ring rolling mill feed rate and rpm calculation Products As a leading global manufacturer of crushing grinding and mining equipments we offer advanced reasonable solutions for any size reduction requirements including Ring rolling mill feed rate and rpm calculation quarry aggregate and different kinds of minerals.

Get Price### Calculation of Rolling Load and Torque in the Hot

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 metal.

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The method to predict roll deformation precisely and efficiently is vital for the strip shape control of a six high rolling mill Traditional calculation methods of roll deformation such as the finite element method and the influence function method have been widely used due to their accuracies However the required calculation time is too long to be applied to the real time control

Get Price### Roll Pass Designing in Continuous Bar Mills

Roughing mill 28 Roughing mill I1 to C4 Intermediate or stretching mill C5 to C10 Finishing mill 21 Apr 09 Ansar Hussain Rizvi 21 Apr 09 Ansar Hussain Rizvi The purpose of bar rolling is to obtain a long product through changing its shape at each stand.

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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

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the simulation of hot rolling mills These calculations constitute interacting loops that are intimately related to each other A straight forward calculation is not possible but for purposes of discussion the four calculations will be treated separately 2.1 Roll pass sequence

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A reversing cold rolling mill has been suffering from such drawbacks as unrolled portions necessarily produced in head and tail ends reduce yield and time consuming works including removing of coils threading of the strip and holding of the strip with the

Get Price### Rolling of Metals Process and Principles With Diagram

The rolling process is shown in Fig 2.1 Rolling is done both hot and cold It is accomplishes in rolling mills A rolling mill is a complex machine having two or more working rollers supporting rollers roll stands drive motor reducing gear flywheel coupling gear etc Rollers may be plain or grooved depends upon the shape of rolled product.

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The first rolling machine was made in the late 17th century The steel rolling machines are generally used in various sectors like Transmission Line Towers Communication Tower Wind Mill Tower Ship Building Railways Industrial Infrastructural Projects and other Nation Building Infrastructure like Bridges Electrification Projects etc.

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machines Article Calculating Power Parameters of Rolling Mill Based on Model of Deformation Zone with Four Roll Passes Marina N Samodurova 1 Olga I Karandaeva 2 Vadim R Khramshin 3 and Ivan V Liubimov 2 1 Department of Metal Forming South Ural State University 454080 Chelyabinsk Russia samodurovamn susu.ru

Get Price### ROLLINGPrimetals Technologies

roughing mill the cooling model predicts subsequent rolling temperatures and controls the speed of the fin ishing mill with an optimized speed diagram Since the future rolling speed is thus a known factor it can improve the accuracy of the values for the final rolling and coiler temperatures above all for thick strip where

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Rolling mill production mill is the main technical and economic indicators to measure the effect Rebar yield per unit time in the productivity of the rolling mill is called Respectively h class 8h day d in a is calculated as the time unit Hour production of the mill which used productivity indicators.

Get Price### Rolling Technology and Theory for the Last 100 Years The

At the time when the past basic research and development flowered development of many new type rolling mills with the crown shape control function were reported 72 73 74 75 76 77 78 A pair cross rolling mill with a big effect of profile control for hot rolling mills was put to practical use 79 which became a standard rolling mill for the

Get Price### Effect of pass schedule and groove design on the metal

a hot rolling mill are usually designed based on the type of grades and dimensions of the products and the mill capacity These have been established over the years based on ana lytical methods With modern capability of computer based simulation of the hot deformation process it is possible to evolve roll groove and pass design in a more

Get Price### The Calculation of Roll Force and Torque in Hot Rolling Mills

The Calculation of Roll Force and Torque in Hot Rolling Mills R B Sims B.Sc Proceedings of the Institution of Mechanical Engineers 1954 168 1

Get Price### Load Analysis of Rolls in a Rolling Mill A Comparison of

Following are the results of the calculation of the roll load for various passes of the material through the rolling mill on the basis of the output voltage obtained in the strain indicator circuit III CALCULATION OF LOAD FROM W.L ROBERT‟S FORMULA f V c l e Where f Specific rolling force force per unit width of material V c

Get Price### Roll Pass Designing in Continuous Bar Mills

Roughing mill 28 Roughing mill I1 to C4 Intermediate or stretching mill C5 to C10 Finishing mill 21 Apr 09 Ansar Hussain Rizvi 21 Apr 09 Ansar Hussain Rizvi The purpose of bar rolling is to obtain a long product through changing its shape at each stand.

Get Price### Mill loadroll force torque power during steel rolling

MILL LOADRoll Force Torque Power The Mill Load application is specifically developed for mill design/operation engineers to calculate roll separating force rolling torque and power etc Typically load calculation is needed for an existing mill when a new rolling process is applied either with higher reduction or in lower temperature or higher speed or for a stronger material.

Get Price### The Study of Continuous Rolling Mill Inter stand Tension

The rolling mill is simulated by means of MATLAB environment and SIMULINK application 13 14 Structural diagrams of the asynchronous motor with frequency converter and vector speed control have been developed the structural diagram of strip within the inter stand gap is also provided 17 18 is used Speed calculation considers the

Get Price### Multi pass Hot Rolling of SteelsSente Software

Multi pass Hot Rolling of Steels Multi pass hot rolling is a general practice in the production of plates An illustration of a plate mill Fig 1 is shown below to demonstrate how a series of processes are carried out to produce plates from steel slabs.

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Roll pass design is a set of methods for determining the dimensions shape number and type of arrangement of rolling mill passes Roll pass design also includes the calculation of pressing forces and their distribution on the roll passes Several passes are made for each section a square or round billet or bloom acquires a specified form on

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only under so called normal rolling conditions and even these change continuously with progressive wear in the contact zone Besides normal rolling conditions a stable theoretical assumptionmills experience many different changes in rolling conditions After a roll change or a mill stop rolls need some time to return to stable

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Wang et al proposed a high efficiency calculation method of roll stack elastic deformation for four high mill and obtained strip thickness distribution rolling pressure and pressure between rolls Chen et al 10 established the models of rolls system elastic deformation and roll flattening deformation considering work roll contact.

Get Price### Load Analysis and Driven Power Calculation Symmetrical 3

Calculation of driving power 3.1 Lower roller drive moment The lower roller of the plate rolling machine is the driving roller and the driving torque on the lower roller is used to overcome the deformation torque T n1 and the friction torque T n2. In the process of steel plate rolling the deformation capabilities which stored in AB section of steel plate see Fig 1a and Fig 2 is 2Mθ the

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Rolling mill calculation Products As a leading global manufacturer of crushing grinding and mining equipments we offer advanced reasonable solutions for any size reduction requirements including Rolling mill calculation quarry aggregate and different kinds of minerals.

Get Price### Rolling processesالرئيسية

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.

Get Price### Basics of Rolling and Rolling MillsIspatGuru

Fig 4 Roll configurations in rolling mills Two high mill roll configurationThis is the most commonly used rolling mill configuration In this configuration there are two horizontally mounted rolls The rolling mill motor drives either both rolls top and bottom or only one roll normally the bottom roll with the top roll rotating due to the friction between the roll and the work piece.

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3.3.4 Mill load 21 3.4 Strain and Strain Rate 22 3.5 Mathematical Model for Rolling Force 23 3.5 .1 Sims Method of Calculation of Rolls Separation Force 24 3.5.2 Cook and McCrum s Method of Calculation of Roll Separation Force 26 3.5.3 Roberts Method 27 3.5.4 Lower and Upper Bound Analysis 29 3.5.5 Visioplasticity method 32

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Took the heavy cylinder rolling mill as subject investigated which is used to produce the nuclear power cylinder the large hydrogenation reactor cylinder and the coal liquefaction reactor cylinder And the cylinder rolling mill has two drive rolls which is different from conventional ring rolling mill The rolling theory of heavy cylinder rolling mill was researched deeply based on mechanism

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