Question

__________ involves hammering of heated bars inside closed impression dies.

(a) Press forging

(b) Drop forging

(c) Hammer forging

(d) Upset forging

This question was addressed to me in quiz.

I would like to ask this question from Cryogenics, Hot and Cold Working of Metals in chapter Mechanical Working Processes & Phase Transformations of Engineering Material & Metallurgy

Answer 1

Right answer is (b) Drop forging

To elaborate: Drop or die forging is a slow process which involves hammering of heated bars of metal inside closed impression dies. It is used to make small parts weighing a few grams to even heavy parts weighing several kilograms. It is used for complex shapes like connecting rods and crankshafts.