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.
2mm aluminium sheet bending.
After a few wiggles the sheet will fracture along the cut line leaving a clean break as shown in the above photos.
How to bend sheet metal without a brake in 4 different methods with minimal or homemade tools.
The finer the marks the more accurate your bends and cuts will be.
Material bend radii and minimum bend size charts please note.
Place the fracture line over the edge of a table and bend the overhang slightly downwards.
This doesn t sound like a lot but when you are drilling four holes to mate up to another piece its important.
Flip the sheet over and repeat.
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.
Move the sheet around inside the brake as needed to align the bend point with the internal edge of the clamp bar the side facing you.
Create a long fracture line then progressively bend the sheet from one end to to the other.
Adjust the edge of your sheet to set your desired bend line.
With care and patience full size sheets of aluminium can be cut using this method.
With a 2mm line you could be out of square by 2mm or the hole you just drilled is off 2mm.
Use the minimum bend dimension values in the charts below for your minimum closeness of cutout to a bend.
How to bend sheet metal without a brake.
The section of the sheet beneath the clamp bar will fold up and around this edge to produce the bend.
You can also use a craft knife to mark soft metals such as aluminium.