Sheet Metal Bending Radius Formula

Sheet metal calculator bend allowance equations and calculator.

Sheet metal bending radius formula.

Bend allowance ba 0 017453 inside radius 0 0078 material thickness complementary bend angle. Large radius bending also known as r bending large radius bending is when the inside radius is greater than 8 times the material thickness. The bend allowance formula takes into account the geometries of bending and the properties of your metal to determine the bend allowance. Most sheet metal materials will conform to the calculations.

Also known as press braking flanging die bending folding and edging this method is used to deform a material to an angular shape. The following equation relates the k factor to the bend allowance. As explained in my first post the bend deduction can be calculated using the following equation. Bending is one of the most common sheet metal fabrication operations.

Ossb is defined as illustrated in figure 5 for different bending angles and can be calculated using the equation below. Leg length of the workpiece from the edge to the outside tangent point of the bend radius. Kink a light bend typically between 5 and 15 which is used to stiffen a flat piece of metal. It is most economical to use a single bend radius throughout the design but if necessary you can utilize multiple radii.

A review of the bend formulas. Leg length of the workpiece from the edge to the outside tangent point of the bend radius. You only have to insert interior angle flange lengths k factor inside radius and material thickness. Cells on the right will output the desired values.

This is done through the application of force on a workpiece. Use this document to choose values that are both manufacturable and meet your needs. This page also includes a link to a on line sheet metal bend allowance calculator. Then use the neutral bending radius to calculate the arc length of the neutral line circumference of circle multiplied by the bend angle as fraction of 360deg.

Bend radii minimum bend sizes. The force must exceed the material s yield strength to achieve a plastic deformation. Where a is the bending angle t is the sheet thickness and r is the bending radius. Where ossb is the outside setback.

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. You will need to know your material thickness mt the bend angle b the inside radius ir and the k factor k. Large radius bending also known as r bending large radius bending is when the inside radius is greater than 8 times the material thickness.