Calculating Bend Radius Sheet Metal

Therefore the bend allowance added to the flange lengths is equal to the total flat.

Calculating bend radius sheet metal. Punch edge radius in. Cells on the right will output the desired values. 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. Radius of a bend is determined by the hardness and thickness of the metal.

To calculate r which is the radius of the arc on the neutral axis we can use the following equation. Bend allowance is the amount of metal to be added to the total layout. Like previous scenarios let s start by calculating leg length 1. Material to the inside of this line ought to compress whereas the material on the outside of it should expand.

Most sheet metal materials will conform to the calculations. Radius metal will crack at the outside heel of the bend. Outside setback ossb tangent degree of bend angle 2 inside bend radius material thickness bend deduction bd outside setback 2 bend allowance there are two ways to calculate the flat blank. The most important considerations when bending metal is the min.

When bends are made smaller than the required min. Bending angles greater than 90 degrees. Die edge radius in. It simply processes these variables through the equations we will discuss below.

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. Sheet metal calculator bend allowance equations and calculator. You only have to insert interior angle flange lengths k factor inside radius and material thickness.

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 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. And by having t and the sheet thickness t we can calculate the k factor as follow.

Bend radii minimum bend sizes. Determine your minimum bend by measuring the distance from your closest feature i e. The resulting inside bend radius on the part will remain at 63 percent of material thickness. This page also includes a link to a on line sheet metal bend allowance calculator.

In order to develop the flat pattern we add 457 to 1 625 and 2 625 to arrive at 4 707. Ultimate tensile strength psi. A is the bending angle in the above equation so. When we calculate the bend allowance we find that it equals 457.

The bend allowance and bend deduction are two measures that relate the bent length of a piece of sheet metal to the flat length.