Sheet Metal Bend Radius Table

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.

Sheet metal bend radius table.

If you have multiple options optimize your choice. Preferred recommended 90 degree bend radii for various sheet metals. 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. Figure 2 shows us a typical punch and die set used to bend sheet metal. If these guidelines are not followed more research and or some form of analysis may be requried. You may choose any bend radius on this line s.

First we must start with the k factor. This punch and die set would be mounted in a press. Therefore the bending inner radius of our sheet metal parts is basically 0 2. Refer to table s for your choice of material.

It is most economical to use a single bend radius throughout the design but if necessary you can utilize multiple radii. Refer to the first column to choose your material thickness. Consider what minimum bend size you require only consider lines that meet your minimum bend requirement. Steel american iron and steel institute.

Sheet metal bend radii. Being able to read a bend force chart is crucial for any brake press operator and sheet metal engineer. The bend allowance formula takes into account the geometries of bending and the properties of your metal to determine the bend allowance. 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 radii listed are standard minimum if manufacturing for aircraft and aerospace applications. Where necessary 5052 h32 may be bent to 1t and 6061 t6 to 1 1 2t. To use the tables below. You will need to know your material thickness mt the bend angle b the inside radius ir and the k factor k.

The minimum bend radius data shown in these charts is measured to the inside of the bend. The data in the above table is the preferred data and is for reference only. A section view of a typical punch and die set used to create sheet metal bends. Use this document to choose values that are both manufacturable and meet your needs.

The bending angle is 90 sheet thickness 5 mm and the inside radius is 6 mm. Bend radii minimum bend sizes.