Sheet Metal Bending Inner Radius

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

Sheet metal bending inner radius.

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. The minimum bend radius for mild steel sheet metal should be equal to the thickness. The more ductile the sheet metal the smaller the inner bend radius is possible. The bending tool has a radius of 30 mm which means that our inside bend radius r is 30 mm.

The data in the above table is the preferred data and is for reference only. We want to know the final length of the detail. The minimum inside bend radius is even larger when bending with the grain. If the die opening is 0 551 in.

In fact the manufacturer s bending knives usually have a rounded corner of 0 3 and a small number of bending knives have a rounded corner of 0 5. Use this document to choose values that are both manufacturable and meet your needs. 0 972 0 16 the inside bend radius changes to 0 155. Minimum bend includes minimum closeness of cutout to bend radius cold rolled steel 14 gauge 0 075 1 91mm.

The bending angle is 90 sheet thickness 5 mm and the inside radius is 6 mm. 0 551 0 16 the inside bend radius changes to 0 088. The sheet metal design rule of thumb in this case is. The tool can calculate the required bending force for bending aluminum stainless steel mild steel and weldox or strenx high strength steels.

Therefore the bending inner radius of our sheet metal parts is basically 0 2. You will need to know your material thickness mt the bend angle b the inside radius ir and the k factor k. It is most economical to use a single bend radius throughout the design but if necessary you can utilize multiple radii. If the die opening is 0 972 in.

Bend radii minimum bend sizes. In steel between 0 5 and 0 8 in. Discover all our calculation tools in the calculators section of the top menu. Flat sheet 90 degrees bend angle.

The material thickness will be measured in decimal form not by the gauge number. 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.