Minimum Bending Radius For Sheet Metal

To keep it simple i also use a 2 mm inside radius.

Minimum bending radius for sheet metal.

Minimum sheet metal flange bend length is required to avoid cracks in the bending area. If a piece of material is bent too tightly problems can occur. Discover all our calculation tools in the calculators section of the top menu. During bending the sheet metal must bridge fully across the v die see figure 2.

Thick grade 350 and 400 may have a minimum bend radius of 2 5 times the material thickness when transverse bending while longitudinal bending may require a minimum bend radius that s 3 75 times the material thickness see figure 1. 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. This tool allows you to determine tonnage internal radius v die opening and minimum flange you just have to insert the characteristics of the sheet metal to be bent. Minimum flange bend radius and tooling access.

Brittle materials may require v dies in the 8x to 12x range. As the bend radius gets smaller the. What sheet metal shops wish you knew. Minimum sheet metal flange bend length 3 x sheet thickness bend radius.

Let s say i have a 2 mm thick sheet and i want to bend it. Use the known k factor and the known inner bending radius to calculate the bending radius of the neutral line. In steel between 0 5 and 0 8 in. The v die is usually selected to be 5x to 8x the workpiece thickness.

Use the minimum bend dimension values in the charts below for your minimum closeness of cutout to a bend. Material bend radii and minimum bend size charts please note. The tool can calculate the required bending force for bending aluminum stainless steel mild steel and weldox or strenx high strength steels. The minimum bend radius data shown in these charts is measured to the inside of the bend.

In sheet metal design the k factor is used to calculate how much sheet metal one needs to leave for the bend in order to achieve particular final dimensions especially for between the straight sides next the bend. The tables below show bend radii and minimum bend sizes for materials and tooling combinations stocked by protocase. The bend radii listed are standard minimum if manufacturing for aircraft and aerospace applications. It shall be equal to three times of sheet thickness plus bend radius.

The bend radius you select may not be available if the geometry of the part will not allow us to bend with the specific tooling required to achieve that radius. The minimum inside bend radius is even larger when bending with the grain. We go beyond the general rules of sheet metal bending as our customers want tight bend radii for sheet metal parts. 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.