Mechanical Engineering > GATE 2022 SET-1 > Metal Forming
A 4 mm thick aluminum sheet of width w = 100 mm is rolled in a two-roll mill of
roll diameter 200 mm each. The workpiece is lubricated with a mineral oil, which
gives a coefficient of friction, Β΅=0.1. The flow stress (π ) of the material in MPa
is π =207+414 π, where π is the true strain. Assuming rolling to be a plane strain
deformation process, the roll separation force (F) for maximum permissible draft
(thickness reduction) is _________ kN (round off to the nearest integer).
Use:
is average flow stress, πΏ is roll-workpiece
contact length, and β J is the average sheet thickness.
Use:
is average flow stress, πΏ is roll-workpiece
contact length, and β J is the average sheet thickness.Correct : 245
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