Autodesk Inventor 2013 is a powerful CAD software for 3D modeling and design. If you want to incorporate existing 3D models from other software, such as an OBJ file, into your Inventor 2013 projects, here's how you can do it.

Step 1: Launch Autodesk Inventor 2013 and open your project.

Step 2: Go to the 'File' menu and select 'Import.'

Step 3: In the 'Import' dialog box, select 'OBJ' as the file type you want to import.

Step 4: Locate the OBJ file on your computer and click 'Open' to import it into your Inventor 2013 project.

Step 5: Once the OBJ file is imported, you can now work with it just like any other 3D model in your project. You can manipulate, edit, and apply materials to the imported OBJ file as needed.

Step 6: Save your project to retain the imported OBJ file within your Inventor 2013 project.

Importing an OBJ file into Autodesk Inventor 2013 is a straightforward process and allows you to leverage the capabilities of both software to enhance your 3D modeling projects. With the ability to import OBJ files, you can collaborate with other designers using different software and incorporate their work seamlessly into your projects.

In conclusion, knowing how to import an OBJ file into Inventor 2013 expands your ability to work with 3D models and enriches your design capabilities. Whether you're creating prototypes, product designs, or mechanical parts, being able to import OBJ files into Inventor 2013 gives you greater flexibility and access to a wider range of 3D models for your projects.