Calculation Of Bend Radius In Sheet Metal

The radius is produced as a percentage of the die opening regardless of the die style.

Calculation of bend radius in sheet metal.

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 calculator bend allowance equations and calculator. Like previous scenarios let s start by calculating leg length 1. 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. To calculate r which is the radius of the arc on the neutral axis we can use the following equation. For the minimum bend radius for material less than 0. Thick you can use this formula.

And by having t and the sheet thickness t we can calculate the k factor as follow. Therefore the bend allowance added to the flange lengths is equal to the total flat. 50 tensile reduction of area percentage 1 mt 0 1 in these equations you use the percentage as a whole number not a decimal. The bend allowance describes the length of the neutral axis between the bend lines or in other words the arc length of the bend.

A is the bending angle in the above equation so. Most sheet metal materials will conform to the calculations. 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. This page also includes a link to a on line sheet metal bend allowance calculator.

Determine your minimum bend by measuring the distance from your closest feature i e. Bending angles greater than 90 degrees. Choose a bend radius that matches your minimum bend. To calculate the neutral axis distance from the inner face t we can subtract inside bend radius from r.

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. A cutout or the edge of your flange to your bend. The tool can calculate the required bending force for bending aluminum stainless steel mild steel and weldox or strenx high strength steels.

For this material this is the minimum producible inside radius with air forming.