Sheet Metal Bend Deduction Formula

From there we can calculate the k factor and the bend deduction.

Sheet metal bend deduction formula.

The formula is as follows. When the sheet metal is put through the process of bending the metal around the bend is deformed and stretched. The following illustration shows the equation calculation for determining the bend allowance when forming sheet metal. 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.

We will start by calculating the bend allowance. You only have to insert interior angle flange lengths k factor inside radius and material thickness. The formed bend radius is dependent upon the dies used the material properties and the material thickness. The bend allowance describes the length of the neutral axis between the bend lines or in other words the arc length of the bend.

Figure 2 illustrates the sheet that is bent with the bend angle of 90 degrees. Cells on the right will output the desired values. Sheet metal calculator bend allowance equations and calculator. Most sheet metal materials will conform to the calculations.

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

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

As with bend allowance bend deduction comes from the same sources tables and manual testing. 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. The bend deduction is the amount the sheet metal will stretch when bent as measured from the outside edges of the bend.