Bend Deduction Sheet Metal

The bend deduction of means that the material is expected to stretch by that amount during the course of bending.

Bend deduction sheet metal. The material thickness will be measured in decimal form not by the gauge number. Cells on the right will output the desired values. The bend deduction is the amount the sheet metal will stretch when bent as measured from the outside edges of the bend. The bend deduction formula takes into account the geometries of bending and the properties of your metal to determine the bend deduction.

You will need to know your material thickness mt the bend angle b the inside radius ir and the k factor k. Sheet metal bend deduction chart pdf sheet metal bend deduction chart excel conclusion. Understanding the bend allowance and consequently the bend deduction of a part is a crucial first step to understanding how sheet metal parts are fabricated. As this happens you gain a small amount of total length in your part.

You only have to insert interior angle flange lengths k factor inside radius and material thickness. Should be subtracted from the flat pattern so the formed part arrives at the desired dimensions. This is simulated on the part shown above by the section shown in red. The u punch forms a u shape with a single punch.

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 bend radius refers to the inside radius. Bend deductions are the first and more critical aspects when working with fabricated sheet metal.