Calculating Bend Radius Sheet Metal

This page also includes a link to a on line sheet metal bend allowance calculator.

Calculating bend radius sheet metal.

Most sheet metal materials will conform to the calculations. Die edge radius in. It simply processes these variables through the equations we will discuss below. The bend allowance and bend deduction are two measures that relate the bent length of a piece of sheet metal to the flat length.

A is the bending angle in the above equation so. 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. When we calculate the bend allowance we find that it equals 457.

Below is our simple bend allowance calculator it works by inputing the material thickness bend angle inside radius and k factor. Radius metal will crack at the outside heel of the bend. You only have to insert interior angle flange lengths k factor inside radius and material thickness. Choose a bend radius that matches your minimum bend.

Bending angles greater than 90 degrees. Determine your minimum bend by measuring the distance from your closest feature i e. 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. Punch edge radius in.

Therefore the bend allowance added to the flange lengths is equal to the total flat. To calculate the neutral axis distance from the inner face t we can subtract inside bend radius from r. Radius of a bend is determined by the hardness and thickness of the metal. Material to the inside of this line ought to compress whereas the material on the outside of it should expand.

As you can see the bend allowance and bend deduction are closely related below. In order to develop the flat pattern we add 457 to 1 625 and 2 625 to arrive at 4 707. When bends are made smaller than the required min. Ultimate tensile strength psi.

A cutout or the edge of your flange to your bend. Bend radii minimum bend sizes. And by having t and the sheet thickness t we can calculate the k factor as follow. Sheet metal calculator bend allowance equations and calculator.

The resulting inside bend radius on the part will remain at 63 percent of material thickness. 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. Cells on the right will output the desired values.

The most important considerations when bending metal is the min.