SolidWorks may be able to export its own drawings / parts / assembly to other formats - including the ones used by AutoDesk Inventor. It may require a special plugin though, or some kind of add-on that adds support for other CAD formats. You can also probably find some kind of CAD conversion tool that may support this conversion.
Convert SolidWorks drawing file to AutoDesk Inventor CAD part.
We found one software available in the database for this conversion.
Microsoft Windows software - convert slddrw to ipt on Windows
A 2D and 3D CAD construction software
Convert from slddrw file format
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.