DXF is a messy format and pretty hard to handle. If you design your Graphics e.g. in Blender, then you might end up with something like this: DXF export in Blender is messy, so better export it to STL ...
This article will show you how to save a file as SCG, DXF, DST, and CDR in Illustrator. You may be good at Illustrator but you need to share your Illustrator document with persons who use other ...