一种前驱三维工序模型与工序图关联方法

An association method of precursory 3D process model and process drawing

针对三维工序模型重建需解决前驱三维工序模型与工序图关联问题,提出一种基于图元组合单元的属性邻接图前驱三维工序模型与工序图关联方法.提取工序图与前驱三维工序模型投影图的图元组合单元信息,将工序图与投影图用属性邻接图来表示,根据图元组合单元顶点与边的属性信息判断两个属性邻接图是否同构,将前驱三维工序模型与工序图关联问题转化为属性邻接图的映射匹配问题.以侧板类零件为例进行实例验证,结果表明,该方法能够实现前驱三维工序模型与工序图关联.

Three-dimensional（3D） model reconstruction needs to resolve the association problem of precursory 3D process model and process drawing.An approach based on the attribute adjacency graph of the primitive combination units is proposed.By extracting the primitive combination units of process drawing and the projection drawings of the precursory 3D process model,the process drawing and the projection drawings was presented in an attribute adjacency graph.According to the attributes of the vertexes and edges,whether the two attribute adjacency graphs were isomorphism were judged,and the association problem of precursory 3D process model and process drawing was translated to the matching problem of attribute adjacency graphs.Taking the side plate part as an example,the experimental result shows that this method realizes the association of precursory 3D process model and process drawing.