You will need to know your material thickness mt the bend angle b the inside radius ir and the k factor k.
Aluminum sheet metal bend radius.
The material thickness will be measured in decimal form not by the gauge number.
Sheet metal bend radii if these guidelines are not followed more research and or some form of analysis may be requried.
Table 1 preferred recommended 90 degree bend radii for various sheet metals.
Also known as press braking flanging die bending folding and edging this method is used to deform a material to an angular shape.
The bend allowance formula takes into account the geometries of bending and the properties of your metal to determine the bend allowance.
Advantages of bottoming include greater accuracy and less springback.
The tables below show bend radii and minimum bend sizes for materials and tooling combinations stocked by protocase.
We go beyond the general rules of sheet metal bending as our customers want tight bend radii for sheet metal parts.
The bend radius you select may not be available if the geometry of the part will not allow us to bend with the specific tooling required to achieve that radius.
This is done through the application of force on a workpiece.
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.
You described a rough rule to find a steel s minimum bend radius.
The bend radii listed are standard minimum if manufacturing for aircraft and aerospace applications.
Larger bend radii require about the same force for bottoming as they do for air bending however smaller radii require greater force up to five times as much than air bending.
Aluminum where necessary 5052 h32 may be bent to 1t and 6061 t6 to 1 1 2t.
In a previous bending basics article you mention a material s tensile reduction percentage used for calculating the minimum inside bend radius of various metals.
Bending is one of the most common sheet metal fabrication operations.
The force must exceed the material s yield strength to achieve a plastic deformation.
Radii for various thicknesses expressed in terms of thickness t.
Say you get a print that says you need to bend a part to an external angle of 100 degrees that s an internal angle of just 80 degrees.
Per the aluminum association inc.
Still if you want to avoid cracking abide by the minimum bend radius in 0 25 in thick 6061 t6 which is quite large see figure 3 and avoid bending acute angles.
Recommended minimum bend radii for steel and aluminum.
The bending radius must be at least 0 8 t to 2 t for sheet steel.
The minimum bend radius data shown in these charts is measured to the inside of the bend.
If your bend radius needs to be adjusted a member of engineering design services team will contact you before your design is manufactured.
