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how to calculate load on the sheet in cold rolling mill

Cold –Rolling Sheet Mill. Oluwole. This facilitates calculations of the greatest possible load an over estimate of the true load required to carry out the task. . HOT ROLLING PRACTICE An Attempted Recollection institute for classed as sheet, also called "strip" (thickness less than 3 mm,) or plate (thickness The layout of a rolling mill varies, from a simple single

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Mechanics of Cold Rolling of Thin Strip IntechOpen

Mechanics of Cold Rolling of Thin Strip 443 where yiw is the vertical deflection of the work roll at element i, gijw (, ) is the influence function for the work roll deflection due to the combined bending and shear forces generated by rolling load, giwf is the influence function for the work roll deflection due to the force generated by the roll bending mechanism, k represents the minimum element

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POWER IN ROLLING IDC-Online

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. For one revolution of the top roll the resultant rolling load P moves along the circumference of a circle equal to 2π.a Since there are two work rolls

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Fundamental concept of metal rolling mtixtl

•For cold-rolling with lubricants, Suranaree University of Technology Jan-Mar 2007 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. Assume µµµµ= 0.30. The plane-strain flow stress is 140 MPa at entrance and 200 MPa at the exit from the roll gap due to the increasing velocity. h h h mm h

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Deformation Processing Rolling

– Calculate 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 Width of plate w is large Æplane strain h b h f R V 0 V f (> V 0) θ. Prof. Ramesh Singh, Notes by Dr. Singh/ Dr. Colton 14 Flat Rolling Analysis • Friction plays a critical role in enabling rolling Æ cannot roll without

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How to Obtain Rolling Torque? Metals Metallurgy

A 1000 mm wide and 2mm thick mild steel sheet is cold rolled to 1.5 mm thickness. The mean yield strength of the material of sheet is 25 kgf/mm 2. The working roll diameter is 500 mm. Determine the rolling load on the rolling stand if the co-efficient of friction is 0.07. Also determine the rolling torque. Solution: Example 2:

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A BASIC UNDERSTANDING OF THE MECHANICS OF ROLLING

on wear is another issue. Stresses from Hertzian pressure in 4-high cold mill back up rolls were measured years ago, the results were never published, but of high interest also, maybe later. K. H. Schröder July 2003 K. H. Schröder: A BASIC UNDERSTANDING OF THE MECHANICS OF ROLLING MILL ROLLS File: SCHROEDER_ROLLS_010703.DOC

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Rolling of Metals

• Dimensional tolerances for cold-rolled sheet thicknesses +/- 0.1 mm to 0.35 mm (0.004 to 0.014 inch) • Flatness tolerances to within +/- 15 mm/m (3/16 inch/foot) for cold rolling, +/- 55 mm/m (5/8 inch/foot) for hot rolling • Hot rolling and sand casting produce similar ranges for surface finish • Cold rolling produces a very fine surface finish • Gage number identifies standard

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Sheet Camber and Cambering of Rolls Metallurgy

18/4/2018· In hot rolling mills this effect is quite pronounced and should be taken into account while calculating the roll camber. In cold rolling mills the coolant supply at different points on roll surface may be adjusted to minimize this effect. When the roll deflection during rolling is less than the camber ground on the rolls the resulting sheet will have concave camber. Design of Camber for Two

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Load Analysis and Driven Power Calculation (4 Roll Bending

Plate rolling machine is a kind of universal forming equipment to roll sheet metal into cylindrical, arc and other general shapes of the workpiece.. It has been widely used in boiler, shipbuilding, petroleum, chemical industry, metal structure and mechanical manufacturing industry.

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Method of load calculation of electrical drives of rolling

4/6/2018· During manufacturing of heavy strips and plates from difficult-to-form steel grades on sheet and wide-strip rolling mills there is a problem of exact calculation of power parameters of rolling. It is pointed out that known methods do not provide required precise information at high deformation zones in a stand. An improved calculation method for rolling pressure and load torque of electrical

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Mill load roll force, torque, power during steel rolling

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. This is to make sure the force, torque, etc

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Load Analysis and Driven Power Calculation

In this post, the calculation of the force capabilities of symmetrical three-roll bending machine is one of the methods, the other types of plate rolling machine can take it for reference. Force Analysis 2.1 Maximum torque required for a cylinder rolling. When the plate rolling machine is working, the steel sheet should be rolled into the steel

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(PDF) Methodology for Calculation of Rolling Load and

Rolling load calculation: 3.1 Properties of Material to be used for Hot Rolling: Material -A36 Mild Steel UTS -400 Mpa Yield Strength -250 Mpa Elongation -20% Carbon -0.26 Density -7800 kg/m^3 Poisons ratio -0.26 Shear Modulus -79.3 Gpa Table 1: Effect of Temp on UTS PASSES TEMPARATURE ( C) ULTIMATE TENSILE STRENGTH (Mpa) 1 1200 91 2 1128 97 3 1056 103 4 984 111 5 912 120 6 840

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Load Analysis and Driven Power Calculation (4 Roll

Plate rolling machine is a kind of universal forming equipment to roll sheet metal into cylindrical, arc and other general shapes of the workpiece.. It has been widely used in boiler, shipbuilding, petroleum, chemical industry, metal structure and mechanical manufacturing industry.

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03 rolling of metals SlideShare

26/8/2014· • For cold-rolling with lubricants, μ ~ 0.05 0.10. • For hot-rolling,μ ~ 0.2 up to sticky condition. Suranaree University of Technology Tapany Udomphol Jan-Mar 2007 61. 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. Assume μ = 0.30

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Slip Line Field Solution for Second Pass in Lubricated 4

Results showed that the load calculations for constructed slip line field using aluminium sheet rolling as an example tallied with values obtained from Tower Aluminium rolling mill. Slip line fields constructed for the second pass described adequately the rolling pressure in the cold rolling process, giving a valid solution of the exact load estimates on comparison with the industrial load

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Strip Width Calculator Roll-Kraft Roll Forming Roll

Disclaimer. The above information is an estimate only and should be treated as such. Due to different variables on different mills, the width(s) calculated are strictly approximate and should be proven out before ordering an abundant supply.

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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

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48 questions with answers in COLD ROLLING Science topic

18/8/2020· Assume that cold rolling geometry is same as that for hot rolling, and hot rolling results in 10 mm thick, coarse graİned sheet with (0001) basal texture. Relevant answer Javed Kamran

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