We go beyond the general rules of sheet metal bending as our customers want tight bend radii for sheet metal parts.
Aluminum sheet bend radius chart.
Sheet metal bend radii if these guidelines are not followed more research and or some form of analysis may be requried.
The bend radii listed are standard minimum if manufacturing for aircraft and aerospace applications.
The bend allowance describes the length of the neutral axis between the bend lines or in other words the arc length of the bend.
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 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.
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.
To keep it simple i also use a 2 mm inside radius.
Per the aluminum association inc.
The bend allowance and bend deduction are two measures that relate the bent length of a piece of sheet metal to the flat length.
You can easily modify the material thickness inside radius and k factor for each thickness at the top of each column.
Therefore the bend allowance added to the flange lengths is equal to the total flat.
Bend allowance mild sheet steel 90 degree bend allowance bend allowance chart example flat size 2 2 095 3 905.
Use the minimum bend dimension values in the charts below for your minimum closeness of cutout to a bend.
Let s say i have a 2 mm thick sheet and i want to bend it.
The inside radii are based off of a standard air bend force chart.
To use the tables below.
You described a rough rule to find a steel s minimum bend radius.
The minimum bend radius data shown in these charts is measured to the inside of the bend.
Radii for various thicknesses expressed in terms of thickness t.
Divide 50 by the material s reduction percentage as specified by the material supplier subtract by 1 and then multiply by the plate thickness.
Table 1 preferred recommended 90 degree bend radii for various sheet metals.
Refer to table s for your choice of material.
Material bend radii and minimum bend size charts please note.
It is possible to choose other bends if you require but additional lead time and tooling charges may apply.
Sheet metal bend allowance chart pdf sheet metal bend allowance chart excel.
