Current behavior:
In Autodesk Inventor, the "Inseparable" BOM structure can only be applied to subassemblies.
It cannot be assigned to the top-level assembly.
Problem:
When creating fabrication drawings for welded structures (e.g., brackets made of multiple plates),
we often want to treat the entire assembly as a single item in the parts list.
However, currently:
- The top-level assembly is always expanded into individual components (e.g., Plate A, Plate B)
- There is no way to show only the main assembly (e.g., "Bracket") as a single item in the BOM
- As a workaround, users must create an additional dummy subassembly layer, which complicates file structure and management
This leads to:
- Increased modeling complexity
- Reduced clarity in BOM management
- Inefficient workflows, especially in fabrication and welding design
Proposed improvement:
Allow the top-level assembly to be assigned an "Inseparable" BOM structure,
so that it can be treated as a single item in drawings and parts lists without requiring an extra subassembly.
Benefit:
- Simplifies weldment and fabrication workflows
- Reduces unnecessary assembly nesting
- Improves BOM readability and consistency
- Aligns with real-world manufacturing practices (treating welded structures as one unit)
Use case:
A bracket assembly consisting of multiple plates should appear as a single item ("Bracket") in the drawing BOM,
instead of listing all internal plates.
This improvement would significantly enhance productivity for fabrication and mechanical design users.
※This is a common requirement in real-world fabrication workflows.
※日本語補足：
溶接構造の製作図では、複数部品を1体として扱いたいケースが多いが、
現状ではトップアセンブリに対して分解不可が設定できず不便。
