Sheet Metal Bend Deduction Chart

The bend allowance added to the flange lengths is equal to the total flat length of the part.

Sheet metal bend deduction chart.

When the sheet metal is put through the process of bending the metal around the bend is deformed and stretched. 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. When the sheet metal is put through the process of bending the metal around the bend is deformed and stretched. 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 sometimes called the bend compensation describes how much the outside of the sheet has been. Therefore the bend allowance added to the flange lengths is equal to the total flat. When the sheet metal is put through the process of bending the metal around the bend is deformed and stretched. Most sheet metal materials will conform to the calculations.

In the example above it is indicated by a dashed blue line. Calculate unfold size with bend allowance 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. The bend allowance is the amount of the neutral axis that bends.

The bend allowance and bend deduction are two measures that relate the bent length of a piece of sheet metal to the flat length. As this happens you gain a small amount of total length in your part. 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. The bend allowance describes the length of the neutral axis between the bend lines or in other words the arc length of the bend.

You only have to insert interior angle flange lengths k factor inside radius and material thickness. In the example above it is indicated by a dashed blue line. Bend forming 0 l a b 0 43t t thickness deduction 0 43t. The following illustration shows the equation calculation for determining the bend allowance when forming sheet metal.

Sheet metal calculator bend allowance equations and calculator. This page also includes a link to a on line sheet metal bend allowance calculator. V die width is 6 8 times the plate 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.

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 allowance describes the length of the neutral axis between the bend lines or in other words the arc length of the bend.