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.

Bend allowance ba π 180 r k t a. R is inner bend radius. By replacing initial length leg length 1 and 2 in the above equation we can calculate the bend allowance as follows. Therefore the bend allowance added to the flange lengths is equal to the total flat length.

Sheet metal flat length can be calculated in the following three simple steps. If the value of sheet metal k factor and bending flange length is known. The bend allowance and bend deduction are two measures that relate the bent length of a piece of sheet metal to the flat length. Cells on the right will output the desired values.

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. Bend angle represents the angle to which sheet metal has bend here it is 90 degree. Calculate the value bend allowance for required sheet metal bend by using below formula. We can calculate the leg length 1 and 2 as follows.

Ultimate tensile strength psi. 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. 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. Where ba is bend allowance. At the neutral axis we have.