CAD drawings in DWG format can be easily to one of the common raster graphics formats either with some graphics editor, or even dedicated converter like the Any DWG to Image Converter. The file resulting from dwg to emf conversion will be just common picture, meaning you won't be able to edit it any a CAD program anymore.
Open DWG file Open EMF fileA simply batch DWF/DXF to image converter
A free graphics editor