Practice Exercise$-$

Calculate the developed length for given part. What will be blank size require to manufacture this part.

$($Side view$)$

$($criu view$)$

$($Please refer Press Tool design & Construction by P$.$H$.$Joshi$)$

This can be summarized in the following formulae

$L=\frac{}{180}*A*(R+0\mathrm{.}5T)$

When $R2T$

$[$Eqn CI$]$

$L=\frac{}{180}*A*(R+0\mathrm{.}33T)$

When $R<mn>2</mn><mi>T</mi>$

$[$Eqn Clt

$A=$ Angle of bend in degrees

$T=$ Sheet thickness

$R=$ Bend inside radius

$L=$ Development length

Total Developed Length $=L1+L2+L3.$