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Production

Drawing Load, Drawing Stress and Work Done

Common Data Q...

Question

Common Data Question
A cup is to be drawn to a diameter of $70 m m$ with $35 m m$ depth from a $0.5 m m$ thick sheet metal. The cup is drawn in one operation. Assume $σ_{u} = 430 M P a$

The required blank diameter is

86.7 m m

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119.5 m m

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121.24 m m

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169 m m

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Solution

The correct option is C $121.24 m m$
Blank diameter:
$D = \sqrt{d^{2} + 4 d h}$
$= \sqrt{(70)^{2} + (4 \times 70 \times 35})$
$= 121.24 m m$

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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 σu=430MPa The required blank diameter is

The correct option is C 121.24mmBlank diameter: D=√d2+4dh =√(70)2+(4×70×35) =121.24mm

Common Data Question
A cup is to be drawn to a diameter of $70 m m$ with $35 m m$ depth from a $0.5 m m$ thick sheet metal. The cup is drawn in one operation. Assume $σ_{u} = 430 M P a$

The required blank diameter is

The correct option is C $121.24 m m$
Blank diameter:
$D = \sqrt{d^{2} + 4 d h}$
$= \sqrt{(70)^{2} + (4 \times 70 \times 35})$
$= 121.24 m m$