Allowances For Bending Sheet Metal

Radius metal will crack at the outside heel of the bend.

Allowances for bending sheet metal.

The material thickness will be measured in decimal form not by the gauge number. I m going to explain what these methods are and show you how they re using in solidworks. The most important considerations when bending metal is the min. The flatten length of the parts.

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 required die width is 12 mm and tonnage per meter is 22. Sheet metal calculator bend allowance equations and calculator. The lowest common bench capacity is around 100 tonnes.

Sheet metal part design solidworks tutorial bending allowance. Bend allowance is the amount of metal to be added to the total layout. 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. My workpiece s bending line is 3 m so the overall needed force is 3 22 66 tonnes.

The bend allowance describes the length of the neutral axis between the bend lines or in other words the arc length of the bend. Another method that solidworks uses is the bend deduction method. The following illustration shows the equation calculation for determining the bend allowance when forming sheet metal. Bend angle represents the angle to which sheet metal has bend here it is 90 degree.

Where ba is bend allowance. Ba bend angle π 180 r k factor t eqn 1. Therefore even a simple bench with enough room to bend 3 m pieces will do the job. When bends are made smaller than the required min.

This page also includes a link to a on line sheet metal bend allowance calculator. Most sheet metal materials will conform to the calculations. The bend allowance formula takes into account the geometries of bending and the properties of your metal to determine the bend allowance. R is inner bend radius.

The formula for calculating sheet metal bending allowance is please refer to the above picture.