Bend Deduction Sheet Metal

When the sheet metal is put through the process of bending the metal around the bend is deformed and stretched.

Bend deduction sheet metal.

Bend deductions are the first and more critical aspects when working with fabricated sheet metal. Sheet metal bend deduction chart pdf sheet metal bend deduction chart excel conclusion. If missed it will wreak havoc on your formed parts done well and you ll have a precise measurement you and your clients will be happy with. The bend radius refers to the inside radius.

You only have to insert interior angle flange lengths k factor inside radius and material thickness. The bend deduction is the amount the sheet metal will stretch when bent as measured from the outside edges of the bend. Cells on the right will output the desired values. You will need to know your material thickness mt the bend angle b the inside radius ir and the k factor k.

This is simulated on the part shown above by the section shown in red. 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 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.

As this happens you gain a small amount of total length in your part. Should be subtracted from the flat pattern so the formed part arrives at the desired dimensions. The material thickness will be measured in decimal form not by the gauge number.