Bending Sheet Metal Equations

The bend allowance formula takes into account the geometries of bending and the properties of your metal to determine the bend allowance.

Bending sheet metal equations.

All other values are known to the user. My workpiece s bending line is 3 m so the overall needed force is 3 22 66 tonnes. Sheet metal manufacturing and services. The following illustration shows the equation calculation for determining the bend allowance when forming sheet metal.

Most sheet metal materials will conform to the calculations. A bending angle. Ba bend angle π 180 r k factor t eqn 1. Bend angle represents the angle to which sheet metal has bend here it is 90 degree.

Bend allowance of corner flanges at angles other than 90 deg. Where ba is bend allowance. The material thickness will be measured in decimal form not by the gauge number. T sheet thickness.

Distance from bend line to mold line. In above bend allowance formula except sheet metal k factor and bend allowance values. Therefore even a simple bench with enough room to bend 3 m pieces will do the job. The following illustrations shows the equation calculation for determining the bend allowance when forming sheet metal.

Bend allowance ba π 180 r k t a. R is inner bend radius. You will need to know your material thickness mt the bend angle b the inside radius ir and the k factor k. Coining one of the three types of bending for sheet metal where the punch penetrates into the sheet metal under high tonnage forming a consistent bend.

Distance from bend. As explained in my first post the bend deduction can be calculated using the following equation. Where a is the bending angle t is the sheet thickness and r is the bending radius. To ascertain your k factor inside radius and material thickness expressed as a decimal you should use an bend allowance chart.

0 017453 x 90 x 0 020 0 33 x 0 024 0 0438558984 inch bend allowance. Bending is a manufacturing process that produces a v shape u shape or channel shape along a straight axis in ductile materials most commonly sheet metal. Still there is one thing to keep in mind. Mathematically bend allowance during sheet metal bending can be calculated as.

Where ossb is the outside setback. Box bending the process of bending a 4 sided sheet metal box. R inside bend radius. Cross break light bends added to sheet metal in order to stiffen its surface.

Commonly used equipment include box and pan brakes brake presses and other specialized machine presses. As an example if you want to bend 24 gauge sheet metal at a 90 angle the calculation would be. Distance from bend line to mold line. This page also includes a link to a on line sheet metal bend allowance calculator.

The formula for calculating sheet metal bending allowance is please refer to the above picture. Crowning the deflection along a bend. The lowest common bench capacity is around 100 tonnes.