Bend Radius For Steel Sheet

The most common problem with bending a piece of sheet metal too tightly is.

Bend radius for steel sheet. Each and every bend in a piece of sheet metal has a certain minimum internal radius that needs to be taken into account when planning the design of a sheet metal form. Bend radii minimum bend sizes. You will need to know your material thickness mt the bend angle b the inside radius ir and the k factor k. To keep it simple i also use a 2 mm inside radius.

Larger bend radii require about the same force for bottoming as they do for air bending however smaller radii require greater force up to five times as much than air bending. You described a rough rule to find a steel s minimum bend radius. The material thickness will be measured in decimal form not by the gauge number. Bend radius throughout the sheet metal design is kept constant to take the advantage of using the same tool during manufacturing.

The problem with bending too tightly. I can now see that the minimum flange length is 8 5 mm for such a bend so i have to keep it in mind when designing. 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 allowance formula takes into account the geometries of bending and the properties of your metal to determine the bend allowance.

We go beyond the general rules of sheet metal bending as our customers want tight bend radii for sheet metal parts. 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. It is most economical to use a single bend radius throughout the design but if necessary you can utilize multiple radii.

Minimum recommended sheet metal bend length. 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. Let s say i have a 2 mm thick sheet and i want to bend it.

Divide 50 by the material s reduction percentage as specified by the material supplier subtract by 1 and then multiply by the plate thickness. Minimum sheet metal bend length recommendations. If a piece of material is bent too tightly problems can occur. The minimum bend radius data shown in these charts is measured to the inside of the bend.

The bending radius must be at least 0 8 t to 2 t for sheet steel. Bending sheet metal by hand is a manageable task if the piece of sheet metal is small and thin enough to handle.