Sheet Metal Bend Deduction Chart

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.

Sheet metal bend deduction chart.

V die width is 6 8 times the plate thickness. This page also includes a link to a on line sheet metal bend allowance calculator. Cells on the right will output the desired values. The bend allowance describes the length of the neutral axis between the bend lines or in other words the arc length of the bend.

Sheet metal calculator bend allowance equations and calculator. Therefore the bend allowance added to the flange lengths is equal to the total flat. 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. 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 allowance added to the flange lengths is equal to the total flat length of the part. Bend allowance mild sheet steel 90 degree bend allowance bend allowance chart example flat size 2 2 095 3 905. When the sheet metal is put through the process of bending the metal around the bend is deformed and stretched. As this happens you gain a small amount of total length in your part.

Most sheet metal materials will conform to the calculations. 0 060 crs 2 000 2 000 r0 031 aluminum 90 deg. When the sheet metal is put through the process of bending the metal around the bend is deformed and stretched. In the example above it is indicated by a dashed blue line.

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. The bend allowance is the amount of the neutral axis that bends. 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.

You only have to insert interior angle flange lengths k factor inside radius and material thickness. The following illustration shows the equation calculation for determining the bend allowance when forming sheet metal. In the example above it is indicated by a dashed blue line. 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.

Calculate unfold size with bend allowance chart. The bend allowance describes the length of the neutral axis between the bend lines or in other words the arc length of the bend.