A 300-mm-wide strip 25-mm thick is fed (Bottom roll removed) through a rolling mill with two powered Roll No-slip point rolls each of radius = 250 mm. The work Vo Workpiece thíckness is to be reduced to 22 mm in Friction forces Entry Roll zone gap, L zone Exit Torque one pass at a roll speed of 50 rev/min. The work material has a flow curve defined by K=275 MPa and n 0.15, and the coefficient of friction between the rolls and the work is assumed to be 0.12. Determine if the friction is sufficient to permit the rolling operation to be accomplished. If so, calculate the roll force, torque, and horsepower.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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A 300-mm-wide strip 25-mm thick is fed
(Bottom roll removed)
through a rolling mill with two powered
Roll
No-slip
point
rolls each of radius = 250 mm. The work
%3D
Workpiece-
thickness is to be reduced to 22 mm in
Friction forces
one pass at a roll speed of 50 rev/min. The
Entry
Roll
Exit
Torque
zone gap, L
zone
work material has a flow curve defined by
K=275 MPa and n 0.15, and the coefficient of friction between the rolls and the work is
%3D
assumed to be 0.12. Determine if the friction is sufficient to permit the rolling operation to
be accomplished. If so, calculate the roll force, torque, and horsepower.
Transcribed Image Text:A 300-mm-wide strip 25-mm thick is fed (Bottom roll removed) through a rolling mill with two powered Roll No-slip point rolls each of radius = 250 mm. The work %3D Workpiece- thickness is to be reduced to 22 mm in Friction forces one pass at a roll speed of 50 rev/min. The Entry Roll Exit Torque zone gap, L zone work material has a flow curve defined by K=275 MPa and n 0.15, and the coefficient of friction between the rolls and the work is %3D assumed to be 0.12. Determine if the friction is sufficient to permit the rolling operation to be accomplished. If so, calculate the roll force, torque, and horsepower.
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