Sheet Metal Bending Radius

The material thickness will be measured in decimal form not by the gauge number.

Sheet metal bending radius.

Use this document to choose values that are both manufacturable and meet your needs. It is most economical to use a single bend radius throughout the design but if necessary you can utilize multiple radii. The bend allowance formula takes into account the geometries of bending and the properties of your metal to determine the bend allowance. The formed bend radius is dependent upon the dies used the material properties and the material thickness.

This is putting a simple hem on a curved piece of zinc with a 7ft radius. The bend deduction is the amount the sheet metal will stretch when bent as measured from the outside edges of the bend. Most frequently expensive sheet metal bending tools called brakes are used to bend sheet metal but you can also complete this task without one. When sheet metal is bent it stretches in length.

Bend radii minimum bend sizes. The force must exceed the material s yield strength to achieve a plastic deformation. You will need to know your material thickness mt the bend angle b the inside radius ir and the k factor k. The bend radius refers to the inside radius.

Where ossb is the outside setback. The minimum bend radius data shown in these charts is measured to the inside of the bend. Where a is the bending angle t is the sheet thickness and r is the bending radius. Minimum sheet metal flange bend length is required to avoid cracks in the bending area.

The bend radii listed are standard minimum if manufacturing for aircraft and aerospace applications. Since commercial sheet metal bending can be done with less concern for stresses caused during forming operation the radius can be near zero for thin sheet metal. Also known as press braking flanging die bending folding and edging this method is used to deform a material to an angular shape. Minimum sheet metal flange bend length 3 x sheet thickness bend radius.

Bending is one of the most common sheet metal fabrication operations. Bending sheet metal by hand is a manageable task if the piece of sheet metal is small and thin enough to handle. It shall be equal to three times of sheet thickness plus bend radius.