But for harder materials e g.
Minimum bend radius aluminum sheet.
If a piece of material is bent too tightly problems can occur.
Use this document to choose values that are both manufacturable and meet your needs.
Recommended minimum bend radii for steel and aluminum.
Crca inside bend radius equal to 0 65 times of sheet thickness is also enough.
Per the aluminum association inc.
In steel between 0 5 and 0 8 in.
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.
Aluminum where necessary 5052 h32 may be bent to 1t and 6061 t6 to 1 1 2t.
We go beyond the general rules of sheet metal bending as our customers want tight bend radii for sheet metal parts.
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 minimum bend radius data shown in these charts is measured to the inside of the bend.
Aluminum is typically thicker and stronger and requires more force to bend as well as consideration of edge conditions and punch nose radii.
The problem with bending too tightly.
Thick grade 350 and 400 may have a minimum bend radius of 2 5 times the material thickness when transverse bending while longitudinal bending may require a minimum bend radius that s 3 75 times the material thickness see figure 1.
The minimum inside bend radius is even larger when bending with the grain.
It is most economical to use a single bend radius throughout the design but if necessary you can utilize multiple radii.
Recommended minimum bend radii for 90 degree cold forming of sheet plate temper 1 64 in.
Aluminum minimum bend radii for 90 degree cold forming of sheet and plate.
Each and every bend in a piece of sheet metal has a certain minimum internal radius that needs to be taken into account when planning the design of a sheet metal form.
Table 1 preferred recommended 90 degree bend radii for various sheet metals.
Radii for various thicknesses expressed in terms of thickness t.
O 0 0 0 1t 1t 1t 11 2t 2t t4 0 0 1t 11 2 t21 2 3t 31 2t 4t t6 1t 1t 11 2t 21 2t 3t 31 2 t41 2 5t.
Bend radii minimum bend sizes.
The tables below show bend radii and minimum bend sizes for materials and tooling combinations stocked by protocase.
