What is the mechanical interface tool and how can it be used to improve part positioning?

The Mechanical Interface tool in CATIA, introduced in version 2018x, allows users to define interfaces directly within parts during the design phase. These interfaces specify how parts will connect or interact in assemblies, such as bolt holes, grooves for O-rings, or mating faces. Traditional constraints (e.g., coincidence, contact) can break when parts are updated or moved between assemblies. The mechanical interface tool avoids this issue by embedding positioning logic directly into the part design. This ensures robust and reusable connections that adapt to changes without requiring manual rework. This approach simplifies assembly processes by predefining connection points and relationships.

To use the mechanical interface tool:

• Use the part design workbench to create geometry.
• Specify mechanical interfaces (e.g., holes, grooves) using the mechanical interface tool.
• In the assembly design workbench, insert parts into an assembly.
• The predefined interfaces allow quick and accurate positioning without additional constraints.
• If a part’s geometry changes, update its interface definition directly in the part file. This change propagates automatically across all assemblies using that part.