Hi there @visa07,
These files do not appear to contain any information that even requires the 3D conversion function.....plus, they look like they are profile [laser, or plasma..etc] cut files, that have the lead-in present....and they have open geometry in places.
To get these particular files into Solid Edge [assuming as a PSM], simply open the DXF file into a draft template, use the trim corner tool to close the gaps in the geometry, then copy all & paste into s Synchronous sheet metal file....if it gives you a selectable region, you can then add thickness to it, and you're done.
Design Manager Streetscape Ltd
Solid Edge 2019 [MP8] Classic [x3 Seats - Cloud Enabled]
Windows 10 - Quadro P2000
I have to make models from flat patterns every day. Not fun at all. My source information is only from a punch machine that does not export dxf. I get to hand sketch the flat by looking at the punch files, then make the model from that.
Just add bend line to the flat patterns, use them to fold up the model, then adjust bend lines until you get the finished dimensions you want. Altering the bend reference point (bend line, outside, inside face) make this step of the process not that bad.