Bend Radius Sheet Metal Thickness

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.

Bend radius sheet metal thickness.

First we must start with the k factor. The bending angle is 90 sheet thickness 5 mm and the inside radius is 6 mm. The bend radius refers to the inside radius. 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.

Recommended inside bend radius for sheet metal parts should be equal to material thickness. We want to know the final length of the detail. But for harder materials e g. It is most economical to use a single bend radius throughout the design but if necessary you can utilize multiple radii.

When sheet metal is bent it stretches in length. We go beyond the general rules of sheet metal bending as our customers want tight bend radii for sheet metal parts. You will need to know your material thickness mt the bend angle b the inside radius ir and the k factor k. 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.

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. 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 bend allowance formula takes into account the geometries of bending and the properties of your metal to determine the bend allowance.

Use this document to choose values that are both manufacturable and meet your needs. 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. Crca inside bend radius equal to 0 65 times of sheet thickness is also enough.

The bend radii listed are standard minimum if manufacturing for aircraft and aerospace applications. The hardness of the metal. The material thickness will be measured in decimal form not by the gauge number. Bend radii minimum bend sizes.

The minimum bend radius data shown in these charts is measured to the inside of the bend.