Sheet Metal Bend Deduction Calculator

The inside bend radius r in m material thickness t in m bend angle a in degrees bend allowance ba are the key elements of this.

Sheet metal bend deduction calculator.

After bending the sheet we need to do some measurements as shown in figure 2. Although it is an option for calculating a bend in some cad programs such as solid works it is not often referred to in the actual manufacturing process since. 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. Bd 2 r t x tan a 2 ba.

Die edge radius in. When the sheet metal is put through the process of bending the metal around the bend is deformed and stretched. Sheet metal bend allowance calculator determines the bend allowance amount of metal to be added to the total layout when forming sheet metal. The bend allowance describes the length of the neutral axis between the bend lines or in other words the arc length of the bend.

Most sheet metal materials will conform to the calculations. The bend allowance is the amount of the neutral axis that bends. You only have to insert interior angle flange lengths k factor inside radius and material thickness. In the example above it is indicated by a dashed blue line.

When the sheet metal is put through the process of bending the metal around the bend is deformed and stretched. Ultimate tensile strength psi. Cells on the right will output the desired values. 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.

Sheet metal calculator bend allowance equations and calculator. As this happens you gain a small amount of total length in your part. Therefore the bend allowance added to the flange lengths is equal to the total flat. We will start by calculating the bend allowance.

Punch edge radius in. The following illustration shows the equation calculation for determining the bend allowance when forming sheet metal. The bend allowance and bend deduction are two measures that relate the bent length of a piece of sheet metal to the flat length. In the example above it is indicated by a dashed blue line.

From there we can calculate the k factor and the bend deduction. Most sheet metal materials will conform to the calculations. Figure 2 illustrates the sheet that is bent with the bend angle of 90 degrees.