In which of the following process, does the die have a convex surface?
(a) Fullering
(b) Edging
(c) Cogging
(d) Cavitising
The question was posed to me by my college director while I was bunking the class.
I'm obligated to ask this question of Open and Closed Die Forging topic in division Forming Process of Casting-Forming-Welding II