I can't believe this worked....
I started making the rear spine for the transfer case crossmenber in metal. Once feature I really wanted was a long 90 degree tab on the back. I want to use that flange to hold some clip-but fasteners. Those fasteners will attach the belly plate to the crossmember. I wanted a fastener that was blind and easy replaceable.
I laid out the shape I needed on a fresh sheet of material. I wanted a nice factory edge on the flange.
The main problem was that part is about 30.63" wide and my Harbor Fright 20 ton press is only about 22" wide. I made a quick press brake for it a year or two ago. It wasn't really designed to bend this kind of material. I normally use it for 12" or less of 10-11 gauge or full width with some 14-16 gauge. That seem to fit most of my needs.
Overall the biggest challenge was the overall width. I have about 20" available for bending, but the part is 30"+
This is what I came up with....
I ended up coming up with the idea to turn the brake sideways in the press. I wasn't thrilled about this. I reduced the width of the flange just over 18". This give me enough room for 4 fasteners spaced about 5" apart with a little tail on each end to keep the clip from rotating off the end of the flange.
The press was working pretty hard!
The die width is pretty narrow on this setup, less than 1". That makes it great for close bends and small flanges, but it does take more force to bend material.
Yes. I did have to use that cheater bar. I could most it with one hand, but it was stiff! I needed to keep an eye on everything. I went slow and kept an eye on everything the best I could.
I had to modify my press brake slightly by removing two of the pins that help keep the upper die aligned. In order to keep the upper die aligned during the initial setup, I had to sacrifice a few of the misses hair ties. They kept the upper die tight to the pins. They where trapped under the die, but they basically got cut in half once the pressure was up. Opps.
Here is how the part came out. Overall I couldn't be happier with how it that worked. Now I need to carefully trim the spine to match the pattern I made with the foam core board the other night.
Here is what the clip nut looks like installed on the flange. The holes have about .045 clearance now on the fastener. I can increase that a little bit. The nut can move around a little bit to deal with hole mis-match on the belly pan.
90 bend turned out pretty well!
I am so happy that actually worked.