Sheet Metal Bend Deduction Chart

As this happens you gain a small amount of total length in your part.

Sheet metal bend deduction chart.

Sheet metal calculator bend allowance equations and calculator. The bend allowance and bend deduction are two measures that relate the bent length of a piece of sheet metal to the flat length. The following illustration shows the equation calculation for determining the bend allowance when forming sheet metal. Understanding the bend deduction and consequently the bend allowance of a part is a crucial first step to understanding how sheet metal parts are fabricated.

0 060 crs 2 000 2 000 r0 031 aluminum 90 deg. The bend allowance describes the length of the neutral axis between the bend lines or in other words the arc length of the bend. 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. In the example above it is indicated by a dashed blue line.

V die width is 6 8 times the plate thickness. When the sheet metal is put through the process of bending the metal around the bend is deformed and stretched. Although it is an option for calculating a bend in some cad programs such as solid works it is not often referred to in the actual manufacturing process since. In the example above it is indicated by a dashed blue line.

The bend allowance is the amount of the neutral axis that bends. The bend allowance describes the length of the neutral axis between the bend lines or in other words the arc length of the bend. When the sheet metal is put through the process of bending the metal around the bend is deformed and stretched. When the sheet metal is put through the process of bending the metal around the bend is deformed and stretched.

Bend forming 0 l a b 0 43t t thickness deduction 0 43t. Bend allowance mild sheet steel 90 degree bend allowance bend allowance chart example flat size 2 2 095 3 905. Calculate unfold size with bend allowance chart. This page also includes a link to a on line sheet metal bend allowance calculator.

Therefore the bend allowance added to the flange lengths is equal to the total flat. L unfold length a outside size b outside size k k factor none 90 bend unfold according to the neutral layer the distance from neutral to sheet inner side is t 3 inner r can refer to the above chart. Cells on the right will output the desired values. Most sheet metal materials will conform to the calculations.

The bend allowance added to the flange lengths is equal to the total flat length of the part. You only have to insert interior angle flange lengths k factor inside radius and material thickness.