Calculating Developed Length For Sheet Metal Bends

If the value of sheet metal k factor and bending flange length is known.

Calculating developed length for sheet metal bends.

At the neutral axis we have. 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. Ba bend angle π 180 r k factor t eqn 1. Bend allowance ba π 180 r k t a.

R is inner bend radius. 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. Calculate the value bend allowance for required sheet metal bend by using below formula.

Ultimate tensile strength psi. 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. Where ba is bend allowance.

Sheet metal flat length can be calculated in the following three simple steps. We know that ba is the length of the arc on the neutral axis. 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.

The formula for calculating sheet metal bending allowance is please refer to the above picture. The bend allowance describes the length of the neutral axis between the bend lines or in other words the arc length of the bend. You only have to insert interior angle flange lengths k factor inside radius and material thickness.