Importing AutoCAD Solids into Inventor

Confirm the AutoCAD 3D objects are 3D solids, and use the following steps to import into Inventor. 

1. Within Inventor, click on "File" tab in the top left corner of the program. 
2. Expand the "Open" option, and select "Import DWG."
3. Select the file that will be opened. 
4. When the DWG/ DXF File Wizard is prompted, select "AutoCAD or AutoCAD Mechanical File" and click on "Next."
5. Confirm all of the 3D objects that will be imported, and click "Next."
6. In "3D data options" check on the "3D Solids" checkbox. 
7. In "Destination for 2D data" select "New Part" and "Wires to 3D sketch."
8. Fill in the rest of the dialog box to include the desired units. 
9. Click on Finish.

Notes:

• Using blocks will not work, Inventor will ignore AutoCAD Blocks.
• If the file contains a nested block of multiple solids, these blocks might need to be exploded in AutoCAD.
• If there is more than one solid in your drawing, Inventor will import all solids into an Assembly.

Export a SAT or STEP file from the AutoCAD file. Then import the resulting SAT or STEP file directly within Inventor.