How do you create a complex surface model in CATIA? What tools do you use?

Creating complex surface models in CATIA involves several steps and tools. Here's a concise overview of the process and key tools:

1. Sketching:
• Use the Sketcher workbench to create 2D profiles and curves
• Tools: Profile, Spline, Connect Curve

2. 3D Curves:
• Create 3D guide curves using the Generative Shape Design workbench
• Tools: 3D Spline, Curve from Table, Project Curve

3. Surface Creation:
• Generate initial surfaces based on curves and profiles
• Tools: Extrude, Sweep, Loft, Multi-Section Surface

4. Surface Manipulation:
• Refine and modify surfaces to achieve desired shape
• Tools: Fill, Blend, Split, Trim, Extrapolate

5. Advanced Surfacing:
• Create complex transitions and shapes
• Tools: N-Sided Surface, Power Copy, Law Surface

6. Analysis and Validation:
• Check surface quality and continuity
• Tools: Curvature Analysis, Draft Analysis, Connect Checker

7. Surface-Solid Operations:
• Convert surfaces to solids or combine with existing solids
• Tools: Close Surface, Thick Surface, Boolean Operations

Key to creating complex surfaces is mastering these tools and understanding how to combine them effectively. Practice and experimentation are crucial for developing proficiency in CATIA surface modeling.