Sheet Metal Bend Deduction Formula

The flatten length of the parts that are lf equals d1 plus d2 minus the bend deduction.

Sheet metal bend deduction formula.

Sheet metal calculator bend allowance equations and calculator. 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 is as follows. As with bend allowance bend deduction comes from the same sources tables and manual testing.

The bend deduction is the amount the sheet metal will stretch when bent as measured from the outside edges of the bend. Bd bend deduction. Figure 2 illustrates the sheet that is bent with the bend angle of 90 degrees. The formed bend radius is dependent upon the dies used the material properties and the material thickness.

The following illustration shows the equation calculation for determining the bend allowance when forming sheet metal. You only have to insert interior angle flange lengths k factor inside radius and 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. From there we can calculate the k factor and the bend deduction.

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. Therefore the bend allowance added to the flange lengths is equal to the total flat. This page also includes a link to a on line sheet metal bend allowance calculator.

Cells on the right will output the desired values. Another method that solidworks uses is the bend deduction method. When the sheet metal is put through the process of bending the metal around the bend is deformed and stretched. We will start by calculating the bend allowance.

When the sheet metal is put through the process of bending the metal around the bend is deformed and stretched. 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. After bending the sheet we need to do some measurements as shown in figure 2.