In the deep drawing of cups, blanks show a tendency to

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In the deep drawing of cups, blanks show a tendency to wrinkle up around the periphery (flange). The most likely cause and remedy of the phenomenon are, respectively.

1. Buckling due to circumferential compression; Increase blank holder pressure.
2. High blank holder pressure and high friction; Reduce blank holder pressure and apply lubricant.
3. High temperature causing increase in circumferential length; Apply coolant to blank.
4. Buckling due to circumferential compression; decrease blank holder pressure.

Correct Option: A

Due to circumferential compression buckling in circumference, by increasing blank holding force buckling decrease in lateral direction of load applied.