Calculation Of Bend Radius In Sheet Metal

Thick you can use this formula.

Calculation of bend radius in sheet metal.

For the minimum bend radius for material less than 0. The bend allowance describes the length of the neutral axis between the bend lines or in other words the arc length of the bend. To calculate the neutral axis distance from the inner face t we can subtract inside bend radius from r. This page also includes a link to a on line sheet metal bend allowance calculator.

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. You only have to insert interior angle flange lengths k factor inside radius and material thickness. Cells on the right will output the desired values. The bend allowance and bend deduction are two measures that relate the bent length of a piece of sheet metal to the flat length.

For this material this is the minimum producible inside radius with air forming. A cutout or the edge of your flange to your bend. Most sheet metal materials will conform to the calculations. The radius is produced as a percentage of the die opening regardless of the die style.

Bending angles greater than 90 degrees. 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. Therefore the bend allowance added to the flange lengths is equal to the total flat. The tool can calculate the required bending force for bending aluminum stainless steel mild steel and weldox or strenx high strength steels.

And by having t and the sheet thickness t we can calculate the k factor as follow. Like previous scenarios let s start by calculating leg length 1. To calculate r which is the radius of the arc on the neutral axis we can use the following equation. 50 tensile reduction of area percentage 1 mt 0 1 in these equations you use the percentage as a whole number not a decimal.

If you have any questions or want to discuss your design contact us. Discover all our calculation tools in the calculators section of the top menu. The following illustration shows the equation calculation for determining the bend allowance when forming sheet metal. If you are working with a material thickness of 0 100 in multiply that by 0 63 to get a minimum inside bend radius of 0 063 in.

Choose a bend radius that matches your minimum bend.