Bend Radius Sheet Metal Thickness

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.

Bend radius sheet metal thickness.

Recommended inside bend radius for sheet metal parts should be equal to material thickness. The bend radii listed are standard minimum if manufacturing for aircraft and aerospace applications. We want to know the final length of the detail. The minimum bend radius data shown in these charts is measured to the inside of the bend.

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 bend allowance formula takes into account the geometries of bending and the properties of your metal to determine the bend allowance. When sheet metal is bent it stretches in length. The hardness of the metal.

Bend radii minimum bend sizes. The bend deduction is the amount the sheet metal will stretch when bent as measured from the outside edges of the bend. 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. Use this document to choose values that are both manufacturable and meet your needs.

First we must start with the k factor. For this material this is the minimum producible inside radius with air forming. Generally speaking the thicker a piece of sheet metal is the wider the internal bend radius will have to be. The thickness of the metal.

The bend radius refers to the inside radius. The bending angle is 90 sheet thickness 5 mm and the inside radius is 6 mm. You will need to know your material thickness mt the bend angle b the inside radius ir and the k factor k. We go beyond the general rules of sheet metal bending as our customers want tight bend radii for sheet metal parts.

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. It is possible to choose other bends if you require but additional lead time and tooling charges may apply. The tables below show bend radii and minimum bend sizes for materials and tooling combinations stocked by protocase. It is most economical to use a single bend radius throughout the design but if necessary you can utilize multiple radii.

But for harder materials e g.