is there a way to convert a 3D part file from SolidWorks to a 3D drawing in AutoCAD and not just a bunch of 2D drawings?
Yes, First, you have to create a sat file using Solidworks selecting "Save as" and changing the format type to SAT. After, open that file in Autocad, go to file menu, select "import" on that menu and change the format to sat. Very important observation is that Autocad just open file before "Sat version 8", so when you are saving the file in Solidworks, go into "Options" and select the version 7. If you choose a newer version, Autocad won't open it. Bye.
In AutoCad-2012 version, you can directly convert to any given file format by choosing the IMPORT option. The files that can be imported are - 3D Studio-*.3ds, ACIS-*.sat, CATIA V4-*.model;*.session;*.exp;*.dlv3, CATIA V5-*.CATPart;*.CATProduct, FBX-*.fbx, IGES-*.jgs;*.jges, Inventor-*.jpt;*.iam, JT-*.jt
Metafile-*.wmf, Micro Station DGN-*.dgn, NX-*.prt, Parasolid Binary-*.x_b, Parasolid Text-*.x_t, Pro/ENGINEER-*.prt*;*.asm*, Pro/ENGINEER Granite-*.g, Pro/ENGINEER Neutral-*.neu, Rhino-*.3dm, SolidWorks-*.prt;*.sldprt;*.asm;*.sldasm, STEP-*.ste;*.stp;*.step and All DGN Files-*.*