1.

For calculating the blank diameter D for thin cylindrical shell of outer diameter d and with height of the shall h, which one of the following formulae is used when d 220r, where r is the comer radius on the punch?

A. \[D=\sqrt{{{d}^{2}}+4d{{h}^{2}}}\]
B. \[D=\sqrt{{{d}^{2}}+4dh-0.5r}\]
C. \[D=\sqrt{{{d}^{2}}+4dh-r}\]
D. \[D=\sqrt{{{d}^{2}}+4dh-1.5r}\]
Answer» B. \[D=\sqrt{{{d}^{2}}+4dh-0.5r}\]


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