Sheet Metal Bend Deduction Formula

The bend radius refers to the inside radius.

Sheet metal bend deduction formula.

The formed bend radius is dependent upon the dies used the material properties and the material thickness. 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. When the sheet metal is put through the process of bending the metal around the bend is deformed and stretched. Most sheet metal materials will conform to the calculations.

Therefore the bend allowance added to the flange lengths is equal to the total flat. Lf d1 d2 bd. Understanding the bend deduction and consequently the bend allowance of a part is a crucial first step to understanding how sheet metal parts are fabricated. 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 following illustration shows the equation calculation for determining the bend allowance when forming sheet metal. Understanding the bend allowance and consequently the bend deduction of a part is a crucial first step to understanding how sheet metal parts are fabricated. From there we can calculate the k factor and the bend deduction. When the sheet metal is put through the process of bending the metal around the bend is deformed and stretched.

Another method that solidworks uses is the bend deduction method. 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. This page also includes a link to a on line sheet metal bend allowance calculator.

You only have to insert interior angle flange lengths k factor inside radius and material thickness. Figure 2 illustrates the sheet that is bent with the bend angle of 90 degrees. After bending the sheet we need to do some measurements as shown in figure 2. Bd bend deduction.

The flatten length of the parts that are lf equals d1 plus d2 minus the bend deduction. We will start by calculating the bend allowance. Sheet metal calculator bend allowance equations and calculator.