Sheet Metal K Factor Formula

You can use this k factor calculator to calculate k factor using reverse engineering method.

Sheet metal k factor formula.

K factor in sheet metal bending is a constant used to calculate sheet metal flat length or flat pattern. 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. The part of the material that bends. 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.

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 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. 4 1 893 2 214.

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. This change in sheet length depends on the position of neutral axis or k factor. Cad tools use k factor to calculate sheet metal blank. Subtract twice the leg length from the initial length to determine the bend allowance.

Mathematically k factor value is equal to the ratio of position of neutral axis and sheet thickness. In this article we will discuss sheetmetal bend deduction bend allowance k factor y factor and sheet metal flat pattern calculations. Calculate k factor bend allowance and y factor for sheet metal bending.