I have a lot of thin wall tubing (2.5" OD by .080" wall). I want to cut it in ~24" lengths, clamp it in two vises on a CNC milling center and cut a fish mouth in both ends. I plan to weld these to make a grid structure.
I want to use common tooling. My thought was to put a disc near each end so the vise would not crush the tubing. Now I have the cutting issue. I am looking for a method that would cut the fish mouth fast and efficiently. Does anyone have some good ideas?