Per the aluminum association inc.
Aluminum sheet bend radius chart.
Let s say i have a 2 mm thick sheet and i want to bend it.
The bend allowance describes the length of the neutral axis between the bend lines or in other words the arc length of the bend.
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.
Bend allowance mild sheet steel 90 degree bend allowance bend allowance chart example flat size 2 2 095 3 905.
Radii for various thicknesses expressed in terms of thickness t.
To use the tables below.
Aluminum minimum bend radii for 90 degree cold forming of sheet and plate.
Sheet metal bend radii if these guidelines are not followed more research and or some form of analysis may be requried.
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 allowance chart pdf sheet metal bend allowance chart excel.
It is possible to choose other bends if you require but additional lead time and tooling charges may apply.
To keep it simple i also use a 2 mm inside radius.
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.
We go beyond the general rules of sheet metal bending as our customers want tight bend radii for sheet metal parts.
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.
Therefore the bend allowance added to the flange lengths is equal to the total flat.
You can easily modify the material thickness inside radius and k factor for each thickness at the top of each column.
Refer to table s for your choice of material.
The bend allowance and bend deduction are two measures that relate the bent length of a piece of sheet metal to the flat length.
0 060 crs 2 000 2 000 r0 031 aluminum 90 deg.
The inside radii are based off of a standard air bend force chart.
I can now see that the minimum flange length is 8 5 mm for such a bend so i have to keep it in mind when designing.
Use the minimum bend dimension values in the charts below for your minimum closeness of cutout to a bend.
Table 1 preferred recommended 90 degree bend radii for various sheet metals.
