MBD model based processing feature identification and modeling method
A technology for processing features and models, applied in the field of intelligent process design, can solve problems such as difficulty in adding feature types, high dependence on modeling history and modeling methods, and dependence on feature types, etc., to achieve the effect of improving utilization
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Embodiment 1
[0083] Such as figure 1 Shown is an MBD model-based processing feature recognition and modeling method provided by an embodiment of the present invention, the method includes model information extraction and processing feature recognition, wherein the model information extraction includes modeling feature information extraction, geometric voxel information Extraction and product manufacturing information PMI extraction; processing feature identification includes processing feature geometric attribute identification and processing feature process attribute identification, specifically:
[0084] In step 201, product manufacturing information is acquired based on the PMI extraction, wherein the product manufacturing information includes one or more of dimension annotation, roughness annotation, geometric accuracy annotation and text annotation.
[0085] Such as figure 2 As shown, it shows the modeling feature information, geometric voxel information and PMI obtained by the mode...
Embodiment 2
[0110] In combination with Embodiment 1 of the present invention, there is a preferred solution, wherein the mapping of the solid surfaces and corresponding attributes contained in the modeling features to the geometric attributes of the processing features, such as Figure 4 As shown, the center-subgraph method can be used to complete the acquisition of geometric attributes in processing features, including:
[0111] In step 2041, the feature topological center plane is determined.
[0112] Such as Figure 5 The above is a schematic flow diagram of a complete center-subgraph method.
[0113] In step 2042, a component attribute adjacency graph is constructed through the surface and the topological relationship of the surface in the BRep structure of the component model.
[0114] In step 2043, the subgraph is searched starting from the central plane, and the minimum conditional subgraph matching the feature adjacency graph is obtained.
[0115] In step 2044, the minimum cond...
Embodiment 3
[0128] This example will start from Figure 5 In the way of explaining several main execution modules, it introduces how the embodiment of the present invention obtains the geometric attributes in the machining features according to the MBD part model. Wherein, the method for describing the MBD part model is based on geometric voxel information. Therefore, in this embodiment, the key step objects involved in the center-subgraph matching will be sequentially selected: part attribute adjacency graph, part generalized attribute adjacency graph, generalized processing surface adjacency graph, predefined feature attribute adjacency graph, minimum condition subgraph And homogeneous feature sub-atlas several aspects, explain the method and principle of realization. The center-subgraph matching is proposed by the present invention, and is used to specifically realize step 202 in Embodiment 1, such as Figure 5 As shown, the center-subgraph matching method specifically includes:
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