Deep learning approaches have been shown to be capable of recognizing shape features (e.g. machining features) in Computer-Aided Design (CAD) models in certain circumstances, yet still have issues when the features intersect, and in exploiting the geometric and topological information which comprises the boundary representation (B-Rep) of the typical CAD model. This paper presents a novel hierarchical B-Rep graph shape representation which encodes information about the surface geometry and face topology of the B-Rep. To learn from this new shape representation, a novel hierarchical graph convolutional network called Hierarchical CADNet has been created, which has been shown to outperform other state-of-the-art neural architectures on feature identification, including machining features that intersect, with improvements in accuracy for some more complex CAD models.
- Machining feature recognition
- 3D deep learning
- Hierarchical graph convolution network
- Computer-aided process planning (CAPP)
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MFCAD++ Dataset. Dataset for paper: "Hierarchical CADNet: Learning from B-Reps for Machining Feature Recognition, Computer-Aided Design"
Colligan, A., Jul 2022
Student thesis: Doctoral Thesis › Doctor of PhilosophyFile