Sheet Metal K Factor Formula

Cad tools use k factor to calculate sheet metal blank.

Sheet metal k factor formula.

Calculate k factor bend allowance and y factor for sheet metal bending. The part of the material that bends. This change in sheet length depends on the position of neutral axis or k factor. In this article we will discuss sheetmetal bend deduction bend allowance k factor y factor and sheet metal flat pattern calculations.

4 1 893 2 214. Subtract twice the leg length from the initial length to determine the bend allowance. For our example it comes to. K factor is a ratio of location of the neutral line to the material thickness as defined by t t where t location of the neutral line and t material thickness.

Mathematically k factor value is equal to the ratio of position of neutral axis and sheet thickness. 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. 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. K factor in sheet metal bending is a constant used to calculate sheet metal flat length or flat pattern.

As a result overall sheet length increases. 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. 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.