关键词: 零件, 三维工序模型, 模型重建, 工程图检索, 投影视图, 映射

Abstract: It was difficult to acquire the locating information in the process of Three Dimensional (3D) process model reconstruction driven by process planning course and machining information. To tackle this problem, a method was proposed by mapping the previous 3D process model into current process drawing to realize the machinging benchmark information acquisition. According to the sphere harmonics analysis, the similarity among process drawing and each projection view of the previous 3D process model was computed. For most of the shape function values null, the smooth linear filter theory was used for linear interpolation. Projection view with the greatest similarity was the projection view that the previous 3D process model projected along the direction of process drawing. A graphic primitive adjacent slot and a graphic primitive relation vector were introduced to obtain the process benchmarks. The effectiveness of this method was verified by taking a part as an example.

Key words: parts, three-dimensional process model, model reconstruction, process graph retrieval, projection view, mapping