If you export from Solidworks as STI format (which it can) and from there you can then import into Blender, you might have to enable this import options in the
User Preferences under
add-ons and in the
categories import-export.
Once in Blender you can make any adjustments reqired and export to Fusion as OBJ, FBX or any number of others you might need.
Hope that helps
.