GATE ME 2014 Set 4 — Question 35
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Manufacturing Processes → Forming → Rolling (Load & Torque)
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Question
In a rolling process, the maximum possible draft, defined as the difference between the initial and the final thickness of the metal sheet, mainly depends on which pair of the following parameters?P: Strain
Q: Strength of the work material
R: Roll diameter
S: Roll velocity
T: Coefficient of friction between roll and work
Q: Strength of the work material
R: Roll diameter
S: Roll velocity
T: Coefficient of friction between roll and work
Correct answer
(B) R, T
Solution
The maximum draft in a rolling process is given by the relation , where is the coefficient of friction between the roll and the work material, and is the roll radius (which is half of the roll diameter). Therefore, the maximum draft depends on the roll diameter () and the coefficient of friction ().
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