GATE ME 2016 Set 1 — Question 62
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Manufacturing Processes → Forming → Rolling (Load & Torque)
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Question
A mm thick slab is being cold rolled using roll of mm diameter. If the coefficient of friction is , the maximum possible reduction (in mm) is __________
Correct answer
1.9 to 1.94
Solution
In the cold rolling process, the maximum possible reduction () is given by the relationship between the coefficient of friction () and the roll radius ():Given:
- Thickness of slab = mm (not directly needed for maximum reduction formula)
- Diameter of roll () = mm
- Radius of roll () = mm
- Coefficient of friction () =
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