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Looking at your designs it occured to me that the male side of the cutting die could be concave across 1 axis thus allowing it to begin cutting at both end and finishing in the middle thus lowering...

An arbour press might do the job. Another option would be a small bottle jack fitted into a custom made steel box section frame.

I think a Fly press would be the way to go as well for this. I think you would get a better more even cut with a fly press. If you hit the cutting jig off centre with a large percussion adjuster you...

From what I can see this can all be done with one set of punches on a simple fly press, google fly press.

If the male and female have the bend shape in your last picture, bottom right but also the...