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Q.25 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

1. Q, S
2. R, T
3. S, T
4. P, R

Correct answer: R, T

Solution

The maximum possible draft in a rolling process is primarily influenced by the roll diameter, as larger rolls can accommodate greater thickness reductions, and the coefficient of friction, which affects the grip between the rolls and the material being processed, enabling effective deformation.

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