Bend radii minimum bend sizes.
Minimum bend radius sheet metal metric.
Discover all our calculation tools in the calculators section of the top menu.
The minimum bend radius data shown in these charts is measured to the inside of the bend.
Bend radii and minimum bends are limited to certain values or ranges which are determined by the equipment and tooling combinations available to the manufacturer.
There are a two major factors that affect how tight you can make the internal radius of a bend in a piece of sheet metal.
At the minimum draw an internal radius of 0 5 sheet thickness in order to prevent problems with corners.
The thickness of the metal.
Sophia will adjust the radii drawn in order to retain the shape of the final product.
Use this document to choose values that are both manufacturable and meet your needs.
Recommended minimum bend radii for steel and aluminum.
Generally speaking the thicker a piece of sheet metal is the wider the internal bend radius will have to be.
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.
It shall be equal to three times of sheet thickness plus bend radius.
Minimum sheet metal flange bend length is required to avoid cracks in the bending area.
In steel between 0 5 and 0 8 in.
Minimum hole diameter guidelines.
The hardness of the metal.
Understanding the bend allowance and consequently the bend deduction of a part is a crucial first step to understanding how sheet metal parts are fabricated.
Sheet metal bend radii if these guidelines are not followed more research and or some form of analysis may be requried.
Similarly the harder a piece of metal is the more room.
Bend radii minimum bend sizes.
This tool allows you to determine tonnage internal radius v die opening and minimum flange you just have to insert the characteristics of the sheet metal to be bent.
It is most economical to use a single bend radius throughout the design but if necessary you can utilize multiple radii.
Table 1 preferred recommended 90 degree bend radii for various sheet metals.
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 tool can calculate the required bending force for bending aluminum stainless steel mild steel and weldox or strenx high strength steels.
When the sheet metal is put through the process of bending the metal around the bend is deformed and stretched.
The internal radius is determined by the tools in conjunction with the material properties.
The minimum inside bend radius is even larger when bending with the grain.
As this happens you gain a small amount of total length in your part.
The bend radii listed are standard minimum if manufacturing for aircraft and aerospace applications.
