+1 vote
in Machine Dynamics by (34.3k points)
The relation between stroke punch s and radius of crank r is ______

(a) s=r

(b) s=2r

(c) s=4r

(d) s=r/2

This question was posed to me in quiz.

The query is from Flywheel in a Punching Press in portion Turning Moment Diagrams and Flywheel of Machine Dynamics

1 Answer

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by (38.6k points)
Right choice is (b) s=2r

Explanation: Stroke punch is the distance travelled from top to bottom at the time of punching. Hence is equal to the diameter of the crank.

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