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.
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.
Sheet metal bend radii if these guidelines are not followed more research and or some form of analysis may be requried.
Bending is one of the most common sheet metal fabrication operations.
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.
The force must exceed the material s yield strength to achieve a plastic deformation.
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.
Per the aluminum association inc.
Recommended minimum bend radii for steel and aluminum.
The bending radius must be at least 0 8 t to 2 t for sheet steel.
We go beyond the general rules of sheet metal bending as our customers want tight bend radii for sheet metal parts.
Table 1 preferred recommended 90 degree bend radii for various sheet metals.
You described a rough rule to find a steel s minimum bend radius.
Divide 50 by the material s reduction percentage as specified by the material supplier subtract by 1 and then multiply by the plate thickness.
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.
The tables below show bend radii and minimum bend sizes for materials and tooling combinations stocked by protocase.
If your bend radius needs to be adjusted a member of engineering design services team will contact you before your design is manufactured.
Aluminum where necessary 5052 h32 may be bent to 1t and 6061 t6 to 1 1 2t.
Aluminum minimum bend radii for 90 degree cold forming of sheet and plate.
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.
The bend allowance formula takes into account the geometries of bending and the properties of your metal to determine the bend allowance.
Radii for various thicknesses expressed in terms of thickness t.
The material thickness will be measured in decimal form not by the gauge number.
This is done through the application of force on a workpiece.
The bend radii listed are standard minimum if manufacturing for aircraft and aerospace applications.
The minimum bend radius data shown in these charts is measured to the inside of the bend.
It is possible to choose other bends if you require but additional lead time and tooling charges may apply.
