Calculating Developed Length For Sheet Metal Bends

You only have to insert interior angle flange lengths k factor inside radius and material thickness.

Calculating developed length for sheet metal bends.

At the neutral axis we have. Punch edge radius in. R is inner bend radius. Bend allowance ba π 180 r k t a.

We know that ba is the length of the arc on the neutral axis. The bend allowance and bend deduction are two measures that relate the bent length of a piece of sheet metal to the flat length. The formula for calculating sheet metal bending allowance is please refer to the above picture. Ba bend angle π 180 r k factor t eqn 1.

With this free online tool we quickly get the sheet metal bend deduction and therefore the sheet metal blank initial flat length from the finished part measurements. Ultimate tensile strength psi. In this formula the initial length is 300 mm. By replacing initial length leg length 1 and 2 in the above equation we can calculate the bend allowance as follows.

We can calculate the leg length 1 and 2 as follows. Sheet metal flat length can be calculated in the following three simple steps. Bend angle represents the angle to which sheet metal has bend here it is 90 degree. Cells on the right will output the desired values.

Die edge radius in. Therefore the bend allowance added to the flange lengths is equal to the total flat length. Where ba is bend allowance.