Sheet Metal K Factor Formula

Plug the bend allowance ba the bend angle b inside radius ir and material thickness mt into the below equation to determine the k factor k.

Sheet metal k factor formula.

K factor in sheet metal bending is a constant used to calculate sheet metal flat length or flat pattern. Cad tools use k factor to calculate sheet metal blank. This change in sheet length depends on the position of neutral axis or k factor. Calculate k factor bend allowance and y factor for sheet metal bending.

You can use this k factor calculator to calculate k factor using reverse engineering method. Mathematically k factor value is equal to the ratio of position of neutral axis and sheet thickness. As a result overall sheet length increases. For our example it comes to.

The part of the material that bends. The k factor is defined as the ratio between the material thickness t and the neutral fibre axis t i e. The k factor is the most important and elusive variable of bending because it varies both as a function of the material and according to parameters such as angle and tooling. Best way to calculate k factor in sheet metal is by reverse engineering.

K factor a constant determined by dividing the thickness of the sheet by the location of the neutral axis which is the part of sheet metal that does not change length. Subtract twice the leg length from the initial length to determine the bend allowance. The k factor formulation does not take the forming stresses into account but is simply a geometric calculation of the location of the neutral line after the forces are applied and is thus the roll up of all the unknown error factors for a given setup.