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Edge-based identification of DP-features on free-form solids
T Lim1, H Medellin, C Torres-Sanchez
1Scottish Manufacturing Institute, Heriot-Watt University, Department of Mechanical Engineering, Riccarton, Edinburgh, Scotland EH14 4AS. t.lim@hw.ac.uk
Summary
This study introduces a new algorithm for identifying protrusion and depression features (DP-features) on complex B-Spline surfaces. The method effectively partitions geometric models by analyzing tangent continuity for robust feature boundary detection.
Area of Science:
- Computer-Aided Design (CAD)
- Geometric Modeling
- Computational Geometry
Background:
- Mechanical CAD/CAM applications require precise identification of geometric features.
- Existing algorithms struggle with free-form surfaces and complex feature boundaries.
- Robust detection of protrusion and depression features (DP-features) is crucial for design and manufacturing.
Purpose of the Study:
- To develop a novel partitioning algorithm for identifying DP-features on B-Spline surfaces.
- To enhance the accuracy and robustness of feature recognition in geometric modeling.
- To address the challenge of DP-feature boundaries spanning multiple faces and geometries.
Main Methods:
- The algorithm partitions geometric models by first identifying boundary edges of DP-features.
- It utilizes tangent continuity between edge segments to define feature boundaries.
- A surface patch is generated to cover depressions or isolate protrusions.
Main Results:
- Successfully identifies boundary edges of DP-features on free-form surfaces.
- Demonstrates robustness in detecting feature boundaries across multiple faces.
- Enables accurate isolation of protrusions and covering of depressions.
Conclusions:
- The proposed partitioning algorithm offers a robust solution for DP-feature identification in CAD/CAM.
- The use of tangent continuity is a key innovation for handling complex feature boundaries.
- This method improves the reliability of geometric model analysis for mechanical applications.
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