Sheet Metal Bend Deduction Calculator

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.

Sheet metal bend deduction calculator.

From there we can calculate the k factor and the bend deduction. Therefore the bend allowance added to the flange lengths is equal to the total flat. When the sheet metal is put through the process of bending the metal around the bend is deformed and stretched. This page also includes a link to a on line sheet metal bend allowance calculator.

As this happens you gain a small amount of total length in your part. Sheet metal calculator bend allowance equations and 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. 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.

In the example above it is indicated by a dashed blue line. Most sheet metal materials will conform to the calculations. Punch edge radius in. Cells on the right will output the desired values.

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. Most sheet metal materials will conform to the calculations. 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. Figure 2 illustrates the sheet that is bent with the bend angle of 90 degrees.

We will start by calculating the bend allowance. The bend allowance and bend deduction are two measures that relate the bent length of a piece of sheet metal to the flat length. You only have to insert interior angle flange lengths k factor inside radius and material thickness. Ultimate tensile strength psi.

Die edge radius in. Bd 2 r t x tan a 2 ba. 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 deduction and consequently the bend allowance of a part is a crucial first step to understanding how sheet metal parts are fabricated. 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.