Sheet Metal Bend Deduction Calculator

We will start by calculating the bend allowance.

Sheet metal bend deduction calculator.

Sheet metal calculator bend allowance equations and calculator. 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. In the example above it is indicated by a dashed blue line.

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 is the amount of the neutral axis that bends. In the example above it is indicated by a dashed blue line. Therefore the bend allowance added to the flange lengths is equal to the total flat.

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. Sheet metal right angle bend deduction calculator formula step by step calculation to find the difference between the sum of flange lengths and the initial flat length. 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. 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.

Punch edge radius in. When the sheet metal is put through the process of bending the metal around the bend is deformed and stretched. You only have to insert interior angle flange lengths k factor inside radius and material thickness. From there we can calculate the k factor and the bend deduction.

As this happens you gain a small amount of total length in your part. The bend allowance describes the length of the neutral axis between the bend lines or in other words the arc length of the bend. Bd 2 r t x tan a 2 ba. Ultimate tensile strength psi.

Most sheet metal materials will conform to the calculations. After bending the sheet we need to do some measurements as shown in figure 2. The bend allowance and bend deduction are two measures that relate the bent length of a piece of sheet metal to the flat length. Sheet metal bend allowance calculator determines the bend allowance amount of metal to be added to the total layout when forming sheet metal.

Die edge radius in. Most sheet metal materials will conform to the calculations. 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.