Hey peoples!
I am having a minor debate with a co worker about modeling up a simple 90 degree bend. He has "all inside radii to be minimum bend radius" slapped on his drawing and he has then modeled the part with what I think is an impossible to manufacture inside bend radius of .029".
If the part is .250" thick, 5052 material, the inside bend radius at "minimum" can only be 20% of the material thickness? In other words the inside bend radius should be modeled at .200", Correct?
Thanks in advance.
Jack
I agree with Todd Blacksher. Over years of working with sheet metal, and sometimes operating the press-brake myself, I can confirm that the slots on the large bend radius part will deform when bent. They're just too close to where the punch and die will contact the work piece. Also, the small bend radius will definitely cause serious stress cracks in that work piece.
It's true that a good machinist can cheat the standard sometimes, but why make that a necessity?