Sheet Metal Bending Inner Radius

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.

Sheet metal bending inner radius.

We want to know the final length of the detail. 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. The bend allowance formula takes into account the geometries of bending and the properties of your metal to determine the bend allowance. 0 551 0 16 the inside bend radius changes to 0 088.

You will need to know your material thickness mt the bend angle b the inside radius ir and the k factor k. If the die opening is 0 551 in. Discover all our calculation tools in the calculators section of the top menu. The bending angle is 90 sheet thickness 5 mm and the inside radius is 6 mm.

Minimum bend includes minimum closeness of cutout to bend radius cold rolled steel 14 gauge 0 075 1 91mm. In steel between 0 5 and 0 8 in. 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 tool can calculate the required bending force for bending aluminum stainless steel mild steel and weldox or strenx high strength steels.

The minimum inside bend radius is even larger when bending with the grain. Use this document to choose values that are both manufacturable and meet your needs. It is most economical to use a single bend radius throughout the design but if necessary you can utilize multiple radii. Let s start with 90 degrees bend which is the most simple scenario.

Bend radii minimum bend sizes. The sheet metal design rule of thumb in this case is. Flat sheet 90 degrees bend angle. Therefore the bending inner radius of our sheet metal parts is basically 0 2.

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. If the die opening is 0 972 in.

0 972 0 16 the inside bend radius changes to 0 155. First we must start with the k factor.