Sheet Metal Bending Radius 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 radius calculation.

Punch edge radius in. 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. Bending is one of the most common sheet metal fabrication operations. The tool can calculate the required bending force for bending aluminum stainless steel mild steel and weldox or strenx high strength steels.

To calculate r which is the radius of the arc on the neutral axis we can use the following equation. When the sheet metal is put through the process of bending the metal around the bend is deformed and stretched. Material to the inside of this line ought to compress whereas the material on the outside of it should expand. A is the bending angle in the above equation so.

The mold line lengths are the distances measured to the outside mold line and are equal to the flange lengths plus the setback. Sheet metal calculator bend allowance equations and calculator. This page also includes a link to a on line sheet metal bend allowance calculator. Use this document to choose values that are both manufacturable and meet your needs.

The following illustration shows the equation calculation for determining the bend allowance when forming sheet metal. Bend radii minimum bend sizes. Most sheet metal materials will conform to the calculations. 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.

As this happens you gain a small amount of total length in your part. To calculate the neutral axis distance from the inner face t we can subtract inside bend radius from r. It is most economical to use a single bend radius throughout the design but if necessary you can utilize multiple radii. Ultimate tensile strength psi.

Discover all our calculation tools in the calculators section of the top menu. The values of the setback bend allowance and bend deduction can be calculated from the sheet thickness bend radius bend angle and k factor. This is done through the application of force on a workpiece. Die edge radius in.

Learn more about bending. Cells on the right will output the desired values. You only have to insert interior angle flange lengths k factor inside radius and material thickness. And by having t and the sheet thickness t we can calculate the k factor as follow.