$2.$ Shearing Design $(5$ marks$)$

A sheet metal part as shown below is to be made from a sheet of dimension $\backslash (150\backslash$times $100\backslash$mathrm$\{$~mm$\}\backslash )$ and thickness of $6$ mm $.$ The sheet material is "Brass"

$2\mathrm{.}1$ Find the dimensions of Punching Die $-$ Punching Punch

$2\mathrm{.}2$ Find the dimensions of Blanking Die $-$ Blanking Punch

$2\mathrm{.}3$ Calculate the total force required to cut the whole part if the Tensile Strength of material is $3.$ Bending Die problem $(4$ marks$)$

$3\mathrm{.}1$ Calculate the spring back constant and spring back factor for the V bending of part shown below

$3\mathrm{.}2$ Calculate the Bending Force required to bend the sheet if the tensile strength is $\backslash (200\backslash$mathrm$\{$~N$\}/\backslash$mathrm$\{$mm$\}^\{2\}\backslash )$

Part angle after bending

v$-$Bending of the part