Sheet Metal Bend Deduction

When the sheet metal is put through the process of bending the metal around the bend is deformed and stretched.

Sheet metal bend deduction.

Sheet metal calculator bend allowance equations and calculator. The following illustration shows the equation calculation for determining the bend allowance when forming sheet metal. From there we can calculate the k factor and the bend deduction. The bend deduction is the amount the sheet metal will stretch when bent as measured from the outside edges of the bend.

In the example above it is indicated by a dashed blue line. 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. 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. 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.

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. You only have to insert interior angle flange lengths k factor inside radius and material thickness. Cells on the right will output the desired values. In the example above it is indicated by a dashed blue line.

The bend allowance is the amount of the neutral axis that bends. The formed bend radius is dependent upon the dies used the material properties and the material thickness. This page also includes a link to a on line sheet metal bend allowance calculator. The bend radius refers to the inside radius.

Most sheet metal materials will conform to the calculations. Figure 2 illustrates the sheet that is bent with the bend angle of 90 degrees. The bend allowance describes the length of the neutral axis between the bend lines or in other words the arc length of the bend. After bending the sheet we need to do some measurements as shown in figure 2.

Therefore the bend allowance added to the flange lengths is equal to the total flat. We will start by calculating the bend allowance. If you compare the length of this part before and after the bending you re going to find that they re different. You may be wondering what exactly is bend allowance if you ve never worked with sheet metal before.

The bend allowance ba is the arc length of the bend as measured along the neutral axis of the material. When the sheet metal is put through the process of bending the metal around the bend is deformed and stretched.