HybridCAD: A Comprehensive Dataset for Hybrid Additive-Subtractive Manufacturing Feature Recognition in B-Rep CAD Models

The HybridCAD dataset is a novel resource tailored for hybrid additive-subtractive feature recognition in Computer-Aided Design (CAD) models, uniquely combining features from both manufacturing processes. Building on the MFCAD and MFCAD++ datasets, HybridCAD introduces additive manufacturing features alongside traditional subtractive ones, enabling the exploration and development of machine learning models for more complex, hybrid manufacturing applications. This dataset is especially suited for automatic feature recognition (AFR) research and model training in hybrid manufacturing contexts.Dataset CompositionThe dataset consists of 8,938 Boundary Representation (B-Rep) CAD models distributed into three main directories:STEP Files:Contains CAD models in STEP format, each representing a distinct part with hybrid manufacturing features.Generated using PythonOCC CAD software, these CAD files serve as the foundation for feature recognition tasks.Feature Labels:File: feature_labels.txtProvides unique label IDs for each B-Rep face in every CAD model, denoting the manufacturing feature name it belongs to.Each CAD model face is labelled according to one of 29 hybrid additive-subtractive features, allowing for accurate and detailed feature recognition. Hierarchical B-Rep Graphs:Stored in HDF5 format for structured access to B-Rep data.Detailed structural information is available in h5_structure.txt, explaining the hierarchical arrangement of B-Rep graphs.Dataset SplitsThe dataset is split into training, validation, and testing sets as follows:Training Set: 6,256 samples (70%)Validation Set: 1,342 samples (15%)Testing Set: 1,340 samples (15%)Hybrid Manufacturing FeaturesHybridCAD includes a diverse range of additive and subtractive manufacturing features, expanding beyond the subtractive-only features of MFCAD++. This inclusion enables the exploration of hybrid manufacturing processes and the recognition of a broader feature set in CAD models. The complete feature list includes:Label    Feature0    Chamfer1    Through hole2    Triangular passage3    Rectangular passage4    6-sided passage5    Triangular through slot6    Rectangular through slot7    Circular through slot8    Rectangular through step9    2-sided through step10    Slanted through step11    O-ring12    Blind hole13    Triangular pocket14    Rectangular pocket15    6-sided pocket16    Circular end pocket17    Rectangular blind slot18    Vertical circular end blind slot19    Horizontal circular end blind slot20    Triangular blind step21    Circular blind step22    Rectangular blind step23    Round24    Extrude cylinder25    Extrude rectangle26    Extrude triangle27     Extrude hexagon28     Extrude pentagon29      Stock