Question

A metal sheet is to be bent at an angle of ${57.3}^o$ with a bend radius of 120 mm and the bend allowance for stretch factor 0.6 is 12.3 cm. The thickness of metal is ________ cm. (correct upto one decimal place)

• A. 0.05

Answer 1

The correct option is A 0.05
$\theta ={57.3}^0=1radian$
Band radius, R = 0.120 mm k = 0.6
Band allowance = 123 mm = $\theta$(R + kt) = 1(120 + 0.6 x t)
t = 5 mm
t = 0.5 cm