Sheet Metal Bend Deduction

The bend allowance is the amount of the neutral axis that bends.

Sheet metal bend deduction.

From there we can calculate the k factor and the bend deduction. In the example above it is indicated by a dashed blue line. Cells on the right will output the desired values. The formed bend radius is dependent upon the dies used the material properties and the material thickness.

When the sheet metal is put through the process of bending the metal around the bend is deformed and stretched. If you compare the length of this part before and after the bending you re going to find that they re different. Well when a sheet is bent in the press brake the part of the sheet close to and in contact with the punch elongate to compensate for the given bend. You only have to insert interior angle flange lengths k factor inside radius and material thickness.

We will start by calculating the bend allowance. You may be wondering what exactly is bend allowance if you ve never worked with sheet metal before. 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.

Therefore the bend allowance added to the flange lengths is equal to the total flat. 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. 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.

The bend deduction is the amount the sheet metal will stretch when bent as measured from the outside edges of the bend. 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. After bending the sheet we need to do some measurements as shown in figure 2. Sheet metal calculator bend allowance equations and calculator.

The bend allowance and bend deduction are two measures that relate the bent length of a piece of sheet metal to the flat length. The bend radius refers to the inside radius. In the example above it is indicated by a dashed blue line. The bend allowance ba is the arc length of the bend as measured along the neutral axis of the material.

Most sheet metal materials will conform to the calculations. The bend allowance describes the length of the neutral axis between the bend lines or in other words the arc length of the bend.