Question:-
Which of the following assumptions are correct for cold rolling ?
1. The material is plastic.
2. The arc of contact is circular with a radius greater than the radius of the roll.
3. Coefficient of friction is contact over the arc of contact and acts in one direction throughout the arc of contact.
Select the correct Answer using the codes given below:
Option (A)
1 and 2
Option (B)
1 and 3
Option(C)
2 and 3
Option(D)
1, 2 and 3
Correct Option:
(A)
Question Solution:
In the rolling process, the direction of friction changes at a point alone the contact area. This point is known as the No-slip point or Neutral point, and Material behaves like a plastic and the arc of contact is circular, with a radius greater than the radius of the roll.
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