Sharing 3D assemblies is a critical part of collaborative engineering. However, protecting your design intent and intellectual property (IP) is equally important. When you send large assembly files, you often want the recipient to view or fit parts together without having the ability to modify the internal logic or dimensions of your components.
Why Limit Editing Access?
Limiting access ensures that design integrity remains intact. It prevents accidental changes by stakeholders and protects proprietary manufacturing methods embedded within the assembly structure.
Top Methods to Restrict Assembly Editing
1. Export to Neutral Formats (STEP or IGES)
One of the most common ways to limit editing is by exporting the assembly to a neutral format. While these files can be opened in most CAD software, the "feature tree" is usually stripped away, leaving only a "dumb solid." This makes it significantly harder for anyone to alter the original design parameters.
2. Using "Save as Part" (Simplified Geometry)
Many CAD tools like SolidWorks or Autodesk Inventor allow you to save an entire assembly as a single part file. This merges the components into one body, making it excellent for layout purposes while hiding the individual sub-component details.
3. Digital Rights Management (DRM) & View-Only Links
Modern cloud-based CAD platforms (like Onshape or Fusion 360) offer View-Only permissions. By sending a secure link, the recipient can rotate, measure, and inspect the assembly in a web browser without ever downloading the source file.
Pro Tip: Always include a PDF 3D version if the recipient only needs to visualize the assembly without requiring CAD integration.
Best Practices for Secure File Sharing
- Password Protection: Always use encrypted zip files when sending via email.
- Non-Disclosure Agreements (NDA): Ensure legal protections are in place before sharing sensitive assemblies.
- Metadata Removal: Clean your files of any internal comments or author history before exporting.
By implementing these strategies, you can collaborate effectively while ensuring your 3D assembly designs remain secure and unalterable.
