bend radius vs bottom die opening for press brakes
bend radius vs bottom die opening for press brakes
(OP)
My question is concening bend radius vs die opening. Is it possible to use one nose radius with a variety of die openings to achieve different inside bend radii? For example, if I have a 3/16" nose radius could I get a 3/8" radius for 3/8" material, 1/4" radius for 1/4" material, and so on, just by varying the bottom die opening?





RE: bend radius vs bottom die opening for press brakes
RE: bend radius vs bottom die opening for press brakes
RE: bend radius vs bottom die opening for press brakes
IT IS possible however to use one nose radius to achieve different inside bend radii if you do not have the correct tooling for a project. By adding a "cap" or "wrap" to the punch, you can increase the radii, however the thickness of the cap should generally be equal to or thicker than the material being formed.
Note: by a cap, I mean forming a piece of sheet metal into a "V" shape to fit snuggly over the punch, with the flanges having a bend in them to grip the punch by friction, and also a little bit of duct tape to hold it on.
We have used this on lighter gauges, up to 10 gauge.
For example, you have a 1/8" punch, and you are forming 16 ga. mild steel and you need an inside radius of 1/4". By making a cap of 11 ga. mild steel and put it on the 1/8" punch, you now have a punch that will form an inside radius of 1/4" to 5/32". (.125 + .120 = .245)
The bottom die width will have to be increased accordingly.
Flores