Question

Common Data Question
A cup is to be drawn to a diameter of $70mm$ with $35mm$ depth from a $0.5mm$ thick sheet metal. The cup is drawn in one operation. Assume ${\sigma }_u=430MPa$

The maximum drawing force is

• A. $0.047MN$
• B. $0.082MN$
• C. $0.83MN$
• D. $9.69MN$

Answer 1

The correct option is B $0.082MN$

Drawing force:
$=\pi Dt{\sigma }_u$
$=\pi \times 121.24\times 0.5\times 430=0.082MN$