<p>If you want to <a href="https://knowledge.autodesk.com/support/autocad/troubleshooting/caas/sfdcarticles/sfdcarticles/How-to-convert-a-PDF-to-a-DWG-in-AutoCAD.html ...
These days, I got one case, where one assembly includes some sheet metal parts. In each part, there are some rules, one of which exports the document to DWG/DXF, another exports to other file format.