Calculating Developed Length For Sheet Metal Bends

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Calculating developed length for sheet metal bends.

If the value of sheet metal k factor and bending flange length is known. Ba bend angle π 180 r k factor t eqn 1. We can calculate the leg length 1 and 2 as follows. Bend allowance ba π 180 r k t a.

You only have to insert interior angle flange lengths k factor inside radius and material thickness. R is inner bend radius. The bend allowance and bend deduction are two measures that relate the bent length of a piece of sheet metal to the flat length. At the neutral axis we have.

We know that ba is the length of the arc on the neutral axis. 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. Punch edge radius in.

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. In this formula the initial length is 300 mm. The formula for calculating sheet metal bending allowance is please refer to the above picture.

Calculate the value bend allowance for required sheet metal bend by using below formula. 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. Where ba is bend allowance.