Sheet Metal Bending Inner Radius

For this a bend turns sharp at a radius of 0 078 in.

Sheet metal bending inner radius.

Use this document to choose values that are both manufacturable and meet your needs. Flat sheet 90 degrees bend angle. Therefore the bending inner radius of our sheet metal parts is basically 0 2. As another example say you re working with 0 125 in thick material.

You will need to know your material thickness mt the bend angle b the inside radius ir and the k factor k. Bend radii minimum bend sizes. It is most economical to use a single bend radius throughout the design but if necessary you can utilize multiple radii. The bend deduction is the amount the sheet metal will stretch when bent as measured from the outside edges of the bend.

Wipe bending or edge bending is another way to bend sheet metal edges. The sheet metal design rule of thumb in this case is. Just as a starting point you calculate the inside bend radius at 16 percent of the die opening to be 0 157 in though this is for 60 ksi material so you ll need to adapt to the material type. The more ductile the sheet metal the smaller the inner bend radius is possible.

The u punch forms a u shape with a single punch. The bend radius refers to the inside radius. The formed bend radius is dependent upon the dies used the material properties and the material thickness. Material thickness or 0 1575 in.

Say you re bending soft 13 ksi aluminum with a 0 984 in. In this case the minimum producible inside bend radius is 63 percent of that 0 250 in. When designing sheet metal parts and enclosures it is helpful to use these values as the basis for your design. Die width and a 0 032 in radius punch.

As a result the wipe die also determines the bend s inner radius. It is important to make sure that the sheet is properly pushed onto the wipe die. Bend radii and minimum bends are limited to certain values or ranges which are determined by the equipment and tooling combinations available to the manufacturer. The minimum bend radius for mild steel sheet metal should be equal to the thickness.

The slack between the wipe die and the punch plays an important role in getting a good result. The bending tool has a radius of 30 mm which means that our inside bend radius r is 30 mm. For ordinary low carbon steel plates rust proof aluminum plates brass plates copper plates etc the inner radius 0 2 is no problem. Because 0 125 multiplied by 63 percent gives you 0 078.