Sheet Metal Bending Radius Calculation

Like previous scenarios let s start by calculating leg length 1.

Sheet metal bending radius calculation.

The most important considerations when bending metal is the min. R bending bending with an inside radius greater than 8 times the material thickness. Ultimate tensile strength psi. You only have to insert interior angle flange lengths k factor inside radius and material thickness.

Sheet metal bending parameters calculator. The bend allowance formula takes into account the geometries of bending and the properties of your metal to determine the bend allowance. The tool can calculate the required bending force for bending aluminum stainless steel mild steel and weldox or strenx high strength steels. There are four methods for finding bend allowances.

Reflex angle a geometry term for an angle which is greater than 180 sharp bend when the radius of the bend is less than 63 of the material thickness seen commonly with hemming applications. When bends are made smaller than the required min. A is the bending angle in the above equation so. This page also includes a link to a on line sheet metal bend allowance calculator.

Bending angles greater than 90 degrees. Sheet metal calculator bend allowance equations and calculator. This tool allows you to determine tonnage internal radius v die opening and minimum flange. Radius of a bend is determined by the hardness and thickness of the metal.

The mold line lengths are the distances measured to the outside mold line and are equal to the flange lengths plus the setback. You will need to know your material thickness mt the bend angle b the inside radius ir and the k factor k. The material thickness will be measured in decimal form not by the gauge number. It is most economical to use a single bend radius throughout the design but if necessary you can utilize multiple radii.

Learn more about bending. Use this document to choose values that are both manufacturable and meet your needs. 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 values of the setback bend allowance and bend deduction can be calculated from the sheet thickness bend radius bend angle and k factor.

Most sheet metal materials will conform to the calculations. Punch edge radius in. Die edge radius in. Bend radii minimum bend sizes.

To calculate r which is the radius of the arc on the neutral axis we can use the following equation. You just have to insert the characteristics of the sheet metal to be bent. The following illustration shows the equation calculation for determining the bend allowance when forming sheet metal. To calculate the neutral axis distance from the inner face t we can subtract inside bend radius from r.