Mechanical Engineering > Gate 2020 Set-2 > Forging
A bolt head has to be made at the end of a rod of diameter d = 12 mm by localized
forging (upsetting) operation. The length of the unsupported portion of the rod is 40 mm.
To avoid buckling of the rod, a closed forging operation has to be performed with a
maximum die diameter of ________ mm
Correct : 18-19.5
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