Standard Bending Radius For Sheet Metal

Sheet metal bend brakes are used to bend material into the parts desired geometry.

Standard bending radius for sheet metal.

Regardless of what s called on the print this setup will produce an inside bend radius in the part much greater than that of the punch nose. Crca inside bend radius equal to 0 65 times of sheet thickness is also enough. Bends that are in the same plane need to be designed in the same direction to avoid part re orientation to save both money and time. Usually the preferred distance between holes and a bend is 1 5 times the sheet thickness plus the bend radius 1 5t h.

Also known as press braking flanging die bending folding and edging this method is used to deform a material to an angular shape. The force must exceed the material s yield strength to achieve a plastic deformation. Recommended minimum bend radii for steel and aluminum. The bend radii listed are standard minimum if manufacturing for aircraft and aerospace applications.

Specifing a bend radius from here will help prevent hair line cracks. It is most economical to use a single bend radius throughout the design but if necessary you can utilize multiple radii. We go beyond the general rules of sheet metal bending as our customers want tight bend radii for sheet metal parts. Sheet metal bend radii if these guidelines are not followed more research and or some form of analysis may be requried.

It is possible to choose other bends if you require but additional lead time and tooling charges may apply. In this case the minimum producible inside bend radius is 63 percent of that 0 250 in. 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. But for harder materials e g.

Supplying 3d models without considering these factors increases the chance. Recommended inside bend radius for sheet metal parts should be equal to material thickness. Use this document to choose values that are both manufacturable and meet your needs. Keeping the bend radius consistent will also make parts more cost effective.

Table 1 preferred recommended 90 degree bend radii for various sheet metals. As another example say you re working with 0 125 in thick material. Bend radii minimum bend sizes. The material thickness will be measured in decimal form not by the gauge number.

The tables below show bend radii and minimum bend sizes for materials and tooling combinations stocked by protocase. The bend allowance formula takes into account the geometries of bending and the properties of your metal to determine the bend allowance. Material thickness or 0 1575 in. You will need to know your material thickness mt the bend angle b the inside radius ir and the k factor k.