Sheet Metal Bending Inner Radius

It is most economical to use a single bend radius throughout the design but if necessary you can utilize multiple radii.

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. 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. The bending tool has a radius of 30 mm which means that our inside bend radius r is 30 mm.

Discover all our calculation tools in the calculators section of the top menu. 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. First we must start with the k factor. If the die opening is 0 972 in.

Therefore the bending inner radius of our sheet metal parts is basically 0 2. We want to know the final length of the detail. The data in the above table is the preferred data and is for reference only. Flat sheet 90 degrees bend angle.

The minimum inside bend radius is even larger when bending with the grain. If you re working with 304 stainless steel multiply its median percentage value 21 percent by the die opening. 0 972 0 16 the inside bend radius changes to 0 155. 0 551 0 16 the inside bend radius changes to 0 088.

The material thickness will be measured in decimal form not by the gauge number. The more ductile the sheet metal the smaller the inner bend radius is possible. The sheet metal design rule of thumb in this case is. In steel between 0 5 and 0 8 in.

Bend radii minimum bend sizes. The minimum bend radius for mild steel sheet metal should be equal to the thickness. 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.

The bend allowance formula takes into account the geometries of bending and the properties of your metal to determine the bend allowance. Let s start with 90 degrees bend which is the most simple scenario.