Blender supports export to various 2D/3D formats, including DXF that stores 2D graphics. Some 3rd party programs also support .blend files, but using the original software seems to be the easiest way, considering you can download the program for free.
Convert Blender 3D data file to AutoCAD DXF Drawing Exchange Format.
We found 2 software records in the database related to .blend to .dxf file format conversion.
Microsoft Windows software - convert blend to dxf on Windows
A very popular free program used for work with 3D graphics
Convert from blend file format
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned blend to dxf. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
Apple macOS / Mac OS X software - convert blend to dxf on OS X
A Mac version of the popular 3D visualisation software