Calculating Developed Length For Sheet Metal Bends

Bend angle represents the angle to which sheet metal has bend here it is 90 degree.

Calculating developed length for sheet metal bends.

Where ba is bend allowance. 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. If the value of sheet metal k factor and bending flange length is known. At the neutral axis we have.

Calculate the value bend allowance for required sheet metal bend by using below formula. In this formula the initial length is 300 mm. Therefore the bend allowance added to the flange lengths is equal to the total flat length. Bend allowance ba π 180 r k t a.

R is inner bend radius. The bend allowance describes the length of the neutral axis between the bend lines or in other words the arc length of the bend. Cells on the right will output the desired values. We can calculate the leg length 1 and 2 as follows.

Die edge radius in. We know that ba is the length of the arc on the neutral axis. Ba bend angle π 180 r k factor t eqn 1. You only have to insert interior angle flange lengths k factor inside radius and material thickness.

By replacing initial length leg length 1 and 2 in the above equation we can calculate the bend allowance as follows. The bend allowance and bend deduction are two measures that relate the bent length of a piece of sheet metal to the flat length. Sheet metal flat length can be calculated in the following three simple steps.