Representation and similarity assessment in case-based process planning and die design for manufacturing automotive panels
Representation and similarity assessment in case-based process planning and die design for manufacturing automotive panels
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DOI：
10.1007/s00170-010-2609-3
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发表时间：
2010-03
期刊：
影响因子：
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通讯作者：
Chun-Fong You;Yi-Lung Tsai;Kun-Yu Liu
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文献类型：
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作者：
Chun-Fong You;Yi-Lung Tsai;Kun-Yu Liu
本文提出了一种基于实例推理的汽车覆盖件制造工艺规划和模具设计方法。一个创新的索引表示和检索方法也得到了解决。用于表示具有B-rep结构的面板模型的平弯图保留了产品模型数据格式交换标准中的几何和拓扑数据。收集到多个组中的平整型面由图形节点表示，弯曲型面由图形弧表示。基于弯曲型面与平坦型面之间的拓扑信息，构造了一个图。此外，检测到的孔被认为是另一种图形节点类型。利用几何信息和冲压参数作为图形属性。为了检索一个适当的情况下，一个潜在的巨大的搜索空间，独立的最大集团检测。所有独立的最大集团，代表由模型共享的功能的最大数量被确定。根据检索结果，可以获得以前的工艺方案和模具，以供新的情况下使用。实验结果表明，使用CBR系统集成的产品数据管理系统重用以前的设计，以加快冲压工艺规划和模具设计的实用性。
This work improves process planning and die design in automotive panel manufacturing using a novel case-based reasoning (CBR) methodology. An innovative indexing representation and retrieval approach are also addressed. The flat-bend graph, which is utilized to represent a panel model with a B-rep structure, retains geometric and topological data in the Standard for the Exchange of Product model data format. Flat-type faces collected into several groups are represented by graph nodes, and bend-type faces are represented by graph arcs. Based on the topological information between bend-type faces and flat-type faces, a graph is constructed. Additionally, the holes detected are considered another graph node types. Geometric information and stamping parameters are utilized as graph attributes. To retrieve an appropriate case for a potentially huge search space, independent maximal cliques detection is applied. All independent maximal cliques that represent the maximum number of features shared by models are identified. Based on the retrieval result, previous process plans and die sets can be acquired for use by new cases. Experimental results obtained using the CBR system integrated with the product data management system demonstrate the practicality of reusing previous designs to accelerate stamping process planning and die design.