Bend Deduction Sheet Metal

Cells on the right will output the desired values.

Bend deduction sheet metal.

The u punch forms a u shape with a single punch. The bend deduction formula takes into account the geometries of bending and the properties of your metal to determine the bend deduction. Sheet metal bend deduction chart pdf sheet metal bend deduction chart excel conclusion. When the sheet metal is put through the process of bending the metal around the bend is deformed and stretched.

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. This is simulated on the part shown above by the section shown in red. You only have to insert interior angle flange lengths k factor inside radius and material thickness. 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.

The bend deduction is the amount the sheet metal will stretch when bent as measured from the outside edges of the bend. The material thickness will be measured in decimal form not by the gauge number. Bend deductions are the first and more critical aspects when working with fabricated sheet metal. Should be subtracted from the flat pattern so the formed part arrives at the desired dimensions.

The bend radius refers to the inside radius. The bend deduction of means that the material is expected to stretch by that amount during the course of bending. As this happens you gain a small amount of total length in your part.