Bend Radius Sheet Metal Thickness

Bend radii minimum bend sizes.

Bend radius sheet metal thickness.

It is most economical to use a single bend radius throughout the design but if necessary you can utilize multiple radii. The minimum bend radius data shown in these charts is measured to the inside of the bend. You will need to know your material thickness mt the bend angle b the inside radius ir and the k factor k. It is possible to choose other bends if you require but additional lead time and tooling charges may apply.

Generally speaking the thicker a piece of sheet metal is the wider the internal bend radius will have to be. 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. The bend radius refers to the inside radius. Let s say you have a similar part to the one on the image above it has a straight leg of 20 mm and another of 70 mm.

The thickness of the metal. The bend deduction is the amount the sheet metal will stretch when bent as measured from the outside edges of the bend. Use this document to choose values that are both manufacturable and meet your needs. We go beyond the general rules of sheet metal bending as our customers want tight bend radii for sheet metal parts.

The material thickness will be measured in decimal form not by the gauge number. For this material this is the minimum producible inside radius with air forming. 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.

The formed bend radius is dependent upon the dies used the material properties and the material thickness. If you are working with a material thickness of 0 100 in multiply that by 0 63 to get a minimum inside bend radius of 0 063 in. The bending angle is 90 sheet thickness 5 mm and the inside radius is 6 mm. The bend radii listed are standard minimum if manufacturing for aircraft and aerospace applications.

Recommended inside bend radius for sheet metal parts should be equal to material thickness. Similarly the harder a piece of metal is the more room you ll have to allocate for the bend as well or risk fracturing the sheet metal. The hardness of the metal. But for harder materials e g.

When sheet metal is bent it stretches in length.