Calculating Developed Length For Sheet Metal Bends

Ba bend angle π 180 r k factor t eqn 1.

Calculating developed length for sheet metal bends.

We can calculate the leg length 1 and 2 as follows. In this formula the initial length is 300 mm. Where ba is bend allowance. If the value of sheet metal k factor and bending flange length is known.

At the neutral axis we have. Cells on the right will output the desired values. Calculate the value bend allowance for required sheet metal bend by using below formula. Ultimate tensile strength psi.

Punch edge radius in. The bend allowance and bend deduction are two measures that relate the bent length of a piece of sheet metal to the flat length. R is inner bend radius. Bend angle represents the angle to which sheet metal has bend here it is 90 degree.

Sheet metal flat length can be calculated in the following three simple steps. The bend allowance describes the length of the neutral axis between the bend lines or in other words the arc length of the bend. The formula for calculating sheet metal bending allowance is please refer to the above picture. We know that ba is the length of the arc on the neutral axis.

Therefore the bend allowance added to the flange lengths is equal to the total flat length. Die edge radius in. You only have to insert interior angle flange lengths k factor inside radius and material thickness.