The sheet metal design rule of thumb in this case is.
Bend radius sheet metal rule thumb.
Larger radius will just make some other calculations a little more difficult.
The sheet metal design rule of thumb in this case is.
Outside radius of curls must be at least twice the sheet s thickness.
So in this case the minimum inside bend radius is 2 times the material thickness.
Dropping below that value can bring problems your way.
The inside bend radius should be equal to the thickness of the material that you re forming.
5 1 4.
2 5 material thickness bend radius.
Next subtract 1 from that answer.
4 0 5 2.
If you have any questions or want to discuss your design contact us.
Note that this is just a rule of thumb.
In other words if you re bending 1 8 sheet use a tool with a 1 8 radius to form the inside of the bend.
Minimum sheet metal bend radius depends on the selection of tool and the process.
Choose a bend radius that matches your minimum bend.
A cutout or the edge of your flange to your bend.
What could be simpler than choosing the inner radius ir just the same as the material thickness.
The distance between the sheet metal bend line and edge of the hole should be two times or greater the thickness of the sheet metal.
Determine your minimum bend by measuring the distance from your closest feature i e.
If the material is 0 5 in.
The minimum bend radius for mild steel sheet metal.
Rule of thumb for minimum bend radius.
The more ductile the sheet metal the smaller the inner bend radius is possible.
If you re bending 0 020 thick material use a 0 020 radius.
Minimum sheet metal bending radius.
This avoids later troubles overthinking and silly mistakes.
Distance from outside mold line to the bottom of the cutout should be equal to the minimum flange length prescribed by the air bend force chart.