Sheet Metal Bend Radius Table

The bending angle is 90 sheet thickness 5 mm and the inside radius is 6 mm.

Sheet metal bend radius table.

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. If you have multiple options optimize your choice. Steel american iron and steel institute. This punch and die set would be mounted in a press.

First we must start with the k factor. The bend radius of a sheet metal design will be based on the wall thickness of the part and the tooling that is available in house. The material thickness will be measured in decimal form not by the gauge number. Preferred recommended 90 degree bend radii for various sheet metals.

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 data in the above table is the preferred data and is for reference only. Sheet metal bend radii. If these guidelines are not followed more research and or some form of analysis may be requried.

Use this document to choose values that are both manufacturable and meet your needs. Where necessary 5052 h32 may be bent to 1t and 6061 t6 to 1 1 2t. Therefore the bending inner radius of our sheet metal parts is basically 0 2. You may choose any bend radius on this line s.

Bend radii minimum bend sizes. The minimum bend radius data shown in these charts is measured to the inside of the bend. It is most economical to use a single bend radius throughout the design but if necessary you can utilize multiple radii. Consider what minimum bend size you require only consider lines that meet your minimum bend requirement.

A section view of a typical punch and die set used to create sheet metal bends. Figure 2 shows us a typical punch and die set used to bend sheet metal. Another way to determine the k factor is by following the rule of thumb. The bend allowance formula takes into account the geometries of bending and the properties of your metal to determine the bend allowance.

We want to know the final length of the detail. The gauge inside radius die opening and minimum flange length are all interconnected through different equations and relationships the air bend force. An air bend force chart or force chart breaks down a number of key components of sheet metal bending in an easy to reference format. Being able to read a bend force chart is crucial for any brake press operator and sheet metal engineer.

You will need to know your material thickness mt the bend angle b the inside radius ir and the k factor k. Refer to the first column to choose your material thickness.