Abstract: In order to carry out efficient part changes to adapt to the changing design requirements for serialized part models with similar structural features, the idea based on feature decomposition is proposed to realize its reconstruction. The model decomposition is realized by refining the composition of Boolean segmentation ring, which resolves the model into a Boolean combination of feature bodies; establishing the model weighted attribute adjacency graph, segmenting out the feature subgraphs, and obtaining the geometric topological relationship between the segmentation block and the model as a whole, so as to characterize the connection between the segmented elements of the model; by judging the priority of the segmentation ring segmentation and by deducing from the decomposition process in reverse direction, the face-shell obtained by segmentation is restored into a feature body, and the model is established. The directed graph of design history characterizes the modeling process; the parametric reconstruction of the model is realized based on geometric constraints and positioning constraints. It is verified that the method can realize the rapid change of serialized part models when the part models are reconstructed under the premise of geometric and positioning constraints.

Key words: seriation model, feature decomposition, Boolean partition ring, model reconstruction