A flat-rolling operation of 250 mm wide alloy steeCalculate roll torque ll MTNSA-Take Care... LTE 00:0810%Done7 of 109DATA:Vo = 69 m/minV, = 42 rev/minWr = 260 mmRollers (smooth)D= 600 mmVe30 mmMetalVr25 mmVrFigure 1Water CoolingTable 1: Typical values of strength coefficient K and strain hardening exponent n for selected metals.Strengthcoefficient, KMaterialStrainhardeningexponent, n(MPa)Aluminum, pure, annealed1750.20Aluminum alloy, annealedª2400.15Aluminum alloy, hardened by heat treatment4000.10Copper, pure, annealed3000.50Copper: brass7000.35Steel, low C, annealedª5300.26Steel, high C, annealed®8500.15Steel, alloy, annealed®7000.15Steel, stainless, austenitic, annealed12000.40

GIVEN: **Width (Wt)=250mm **Diameter of rollers (D)=600mm **Height before rolling (ho)=30mm**Height…

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A flat-rolling operation of 250 mm wide alloy stee Calculate roll torque

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

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Concept explainers

Forming and Shaping

Metal forming is a category of metalworking process through which the material can be given the desired shape and size by subjecting it to plastic deformation, where the component undergoes bulk deformation process upon application of loads. Unlike the shearing and machining process, the material does not undergo up to a failure point as indicated in the stress-strain curve. Hence, the stresses induced during the forming process are greater than yield strength but less than the failure strength of the material. The process does not lead to the loss of material, so it can be said to be an economical process. During forming, the material is subjected to tensile forces, compressive forces, bending, and shearing loading conditions. The material should possess the property of ductility to undergo the forming process.

Question

A flat-rolling operation of 250 mm wide alloy stee

Calculate roll torque

ll MTNSA-Take Care... LTE 00:08
10%
Done
7 of 109
DATA:
Vo = 69 m/min
V, = 42 rev/min
Wr = 260 mm
Rollers (smooth)
D= 600 mm
Ve
30 mm
Metal
Vr
25 mm
Vr
Figure 1
Water Cooling
Table 1: Typical values of strength coefficient K and strain hardening exponent n for selected metals.
Strength
coefficient, K
Material
Strain
hardening
exponent, n
(MPa)
Aluminum, pure, annealed
175
0.20
Aluminum alloy, annealedª
240
0.15
Aluminum alloy, hardened by heat treatment
400
0.10
Copper, pure, annealed
300
0.50
Copper: brass
700
0.35
Steel, low C, annealedª
530
0.26
Steel, high C, annealed®
850
0.15
Steel, alloy, annealed®
700
0.15
Steel, stainless, austenitic, annealed
1200
0.40

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