Sheet Metal Bending Calculation

Use the known k factor and the known inner bending radius to calculate the bending radius of the neutral line.

Sheet metal bending calculation.

Ultimate tensile strength psi. Die edge radius in. This page also includes a link to a on line sheet metal bend allowance calculator. 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. Sheet metal calculator bend allowance equations and calculator. The bend allowance formula takes into account the geometries of bending and the properties of your metal to determine 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.

Discover all our calculation tools in the calculators section of the top menu. Cells on the right will output the desired values. Material to the inside of this line ought to compress whereas the material on the outside of it should expand. In sheet metal design the k factor is used to calculate how much sheet metal one needs to leave for the bend in order to achieve particular final dimensions especially for between the straight sides next the bend.

After bending the sheet we need to do some measurements as shown in figure 2. You will need to know your material thickness mt the bend angle b the inside radius ir and the k factor k. 90 degrees bend angle. The tool can calculate the required bending force for bending aluminum stainless steel mild steel and weldox or strenx high strength steels.

The material thickness will be measured in decimal form not by the gauge number. The white dashed line on the part shown above represents the neutral axis which is the theoretical point in the material that does not change during the course of forming. Punch edge radius in. Figure 2 illustrates the sheet that is bent with the bend angle of 90 degrees.

Most sheet metal materials will conform to the calculations. The following illustration shows the equation calculation for determining the bend allowance when forming sheet metal. Therefore the bend allowance added to the flange lengths is equal to the total flat length. You only have to insert interior angle flange lengths k factor inside radius and material thickness.

We will start by calculating the bend allowance. 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.