Allowances For Bending Sheet Metal

Bend allowance is the amount of metal to be added to the total layout.

Allowances for bending sheet metal.

The flatten length of the parts. Ba bend angle π 180 r k factor t eqn 1. Another method that solidworks uses is the bend deduction method. The bend allowance formula takes into account the geometries of bending and the properties of your metal to determine the bend allowance.

The following illustration shows the equation calculation for determining the bend allowance when forming sheet metal. My workpiece s bending line is 3 m so the overall needed force is 3 22 66 tonnes. The lowest common bench capacity is around 100 tonnes. The required die width is 12 mm and tonnage per meter is 22.

R is inner bend radius. Most sheet metal materials will conform to the calculations. Sheet metal part design solidworks tutorial bending allowance. You will need to know your material thickness mt the bend angle b the inside radius ir and the k factor k.

Bend allowance chart k factor 0 33 k factor 0 33 k factor 0 33 k factor 0 33 k factor 0 33 k factor 0 33 k factor 0 33 k factor 0 33 k factor 0 33 mt ir mt ir mt ir mt ir mt ir mt ir mt ir mt ir mt ir 0 163 0 210 0 135 0 164 0 105 0 118 0 075 0 105 0 060 0 092 0 048 0 066 0 036 0 020 0 030 0 020 0 024 0 020 angle 10 15 20 25 30 35 40 45 50 55. The bend allowance describes the length of the neutral axis between the bend lines or in other words the arc length of the bend. The bend allowance and bend deduction are two measures that relate the bent length of a piece of sheet metal to the flat length. Bend angle represents the angle to which sheet metal has bend here it is 90 degree.

The most important considerations when bending metal is the min. Therefore the bend allowance added to the flange lengths is equal to the total flat length. I m going to explain what these methods are and show you how they re using in solidworks. The formula for calculating sheet metal bending allowance is please refer to the above picture.

Radius metal will crack at the outside heel of the bend. Where ba is bend allowance. Radius of a bend is determined by the hardness and thickness of the metal. Sheet metal calculator bend allowance equations and calculator.

This page also includes a link to a on line sheet metal bend allowance calculator.