Crca inside bend radius equal to 0 65 times of sheet thickness is also enough.
Minimum radius sheet metal bends.
Bends specified as angles may be toleranced at plus or minus one half degree at a location adjacent to the bends.
The problem with bending too tightly.
Upon close examination of the bends we find that the sheet metal stretches on the outer surface and that the inside surface seems to shrink.
In low carbon steel sheet metal the minimum radius of a bend should be one half the material thickness or 0 80 mm 0 03 inch whichever is larger.
It is most economical to use a single bend radius throughout the.
When designing sheet metal parts and enclosures it is helpful to use these values as the basis for your design.
Let s say i have a 2 mm thick sheet and i want to bend it.
Layout method sheet metal stretches when it bends is an oversimplification.
Thereby forming a certain angle and curvature shape.
Bend radii minimum bend sizes.
It is most economical to use a single bend radius throughout the design but if necessary you can utilize multiple radii.
In steel between 0 5 and 0 8 in.
The minimum inside bend radius is even larger when bending with the grain.
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.
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.
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.
Minimum inside bend radius for sheet metal recommended inside bend radius for sheet metal parts should be equal to material thickness.
Use this document to choose values that are both manufacturable and meet your needs.
To keep it simple i also use a 2 mm inside radius.
The sheet metal bending height should be at least 2 times the thickness of the sheet metal plus the bending radius that is h 2t r.
Commonly used bends include v bend z bend offset bend and hemming bend etc.
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.
If a piece of material is bent too tightly problems can occur.
For bent sheet metal variation in the raw material thickness increases the recommended precision to 0 010 in.
Bending is a stamping process that uses pressure to force the material to plastically deform.
But for harder materials e g.
