how to calculate load on the sheet in cold rolling mill

Home how to calculate load on the sheet in cold rolling mill

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 ...


Load Analysis and Driven Power Calculation (4 Roll Bending Machine) 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.


The calculation of rolling force. When manufacturing sheet products it's important to understand the rolling force. This is because you need it to set the appropriate roll gap on the mill, accounting for the stretch of the stand. The prediction of rolling force can be challenging due to the large number of inter-connected process variables ...


or a single four-high reversing mill, dependent on the mill design. The finishing train may have up to seven four-high rolling stands in tandem, (see Figure 4). After rolling, the strip is cooled to a controlled temperature on a run out table using banks of water sprays. …


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 its accelerated motion in reverse mode. Improved analytical dependences for rolling pressure and load torque of electrical drive are reviewed.


– Calculate roll separation force ("rolling force") and torque – Processing Limits – 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


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Rolling Mill Load Calculation cold rolling mills are an important part of the production of metal sheet in these plants the metal is incremental viding rolling load drive torque for ward slip and strip temperature and and preset calculation 1 interaction of data and functions in the rolling mill process roll data reduction practices, rolling mill


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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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.


COLD FORMED STEEL SECTIONS-I (1) 12(1 ) 2 2 2 ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ − = b K E t pcr ν π Substituting the values for π, ν = 0.3 and E = 205 kN/mm2, we obtain the value of pcr as with units of N/ mm2 (1a) 2 ⎟ ⎠ ⎜ ⎝ p ≈ 185×10 ×K b 3 t cr The value of K is dependent …


Cold rolled sheet Fully continuous cold strip mill 2 ... Cold rolling The thickness accuracy of cold rolled products is determined by the cold rolling process. Rolling force and strip tension are computer-controlled to minimize thickness deviations during rolling, based on measurements of


straighten the rod or sheet metal, see Fig 8.17. Bending also can be carried on tandem rolling stands to bend the sheet metal in incremental stages (roll forming process), see Fig 8.18. There are also other special bending processes, like swivel bending, circular bending, tube bending, ..etc., see Fig 8.19


• 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


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.


calculate load on the sheet in cold rolling mill, vol 4 issue 2 february 2017 analysis of static and, methodology for calculation of rolling load and forces, rolling processes al mustansiriya university, deformation processing rolling, free download here pdfsdocuments2 com, motor torque load torque and selection of motors, rolling mill ...


In sheet-forming opera-tions, the defonnation stresses are usually in the plane of the sheet metal, whereas in bulk defonnation, the defonnation stresses possess components in all three coordinate directions. Bulk defonnation includes metal working processes such as forging, extrusion, rolling, and drawing. 1. Cold Working Temperatures


to calculate load on the sheet in cold rolling mill steel rolling mill speed calculation formula load calculation is rolling mill' 'roll pass design in continuous bar mills slideshare june 20th, 2018 - roll pass design in continuous bar mills basics of rolling a rolling mill consist important formula to calculate arc to calculate the radius ...


Cold rolling reduction is an important factor that affects drawability of IF steel. It has been observed that increasing cold rolling reduction increases the r m value, at least up to 90% [34].This effect has been shown in Fig. 5.14.Perhaps the most important parameters in the production of a strong {111} recrystallization texture are the annealing temperature and the time of holding [35].


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.


Fig 2, Heat Migration in Cold Mill Work rolls (Hotter regions shown in red) This localized heat input / output process results in a non-uniform distribution of heat, circumferentially around the roll and transversely across the roll body. Additionally the roll is subjected to Thermal 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 ...


The rolling load calculation is a critical parameter when looking for the correct rolling mill setup in steel rolling. The rolling load distribution over the length of the contact arc between the sheet and rolls is a complicated phenomenon and it is affected by several factors