Sheet Metal K Factor Formula

As a result overall sheet length increases.

Sheet metal k factor formula.

The part of the material that bends. Subtract twice the leg length from the initial length to determine the bend allowance. 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. K factor in sheet metal bending is a constant used to calculate sheet metal flat length or flat pattern.

For our example it comes to. Calculate k factor bend allowance and y factor for sheet metal bending. Cad tools use k factor to calculate sheet metal blank. 4 1 893 2 214.

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. In this article we will discuss sheetmetal bend deduction bend allowance k factor y factor and sheet metal flat pattern calculations. This change in sheet length depends on the position of neutral axis or k factor. You can use this k factor calculator to calculate k factor using reverse engineering method.

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 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.