Sheet Metal Bending Calculation

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.

Sheet metal bending calculation.

Cells on the right will output the desired values. This tool allows you to determine tonnage internal radius v die opening and minimum flange you just have to insert the characteristics of the sheet metal to be bent. 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.

90 degrees bend angle. Sheet metal calculator bend allowance equations and calculator. Figure 2 illustrates the sheet that is bent with the bend angle of 90 degrees. Discover all our calculation tools in the calculators section of the top menu.

After bending the sheet we need to do some measurements as shown in figure 2. Material to the inside of this line ought to compress whereas the material on the outside of it should expand. The bend allowance formula takes into account the geometries of bending and the properties of your metal to determine the bend allowance. Therefore the bend allowance added to the flange lengths is equal to the total flat length.

Most sheet metal materials will conform to the calculations. Punch edge radius in. From there we can calculate the k factor and the bend deduction. The following illustration shows the equation calculation for determining the bend allowance when forming sheet metal.

Use the known k factor and the known inner bending radius to calculate the bending radius of the neutral line. 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 material thickness will be measured in decimal form not by the gauge number. 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.

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 tool can calculate the required bending force for bending aluminum stainless steel mild steel and weldox or strenx high strength steels. Most sheet metal materials will conform to the calculations. 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.

You will need to know your material thickness mt the bend angle b the inside radius ir and the k factor k. We will start by calculating the bend allowance.