摘要
实例表示与相似实例检索是基于实例推理CAPP工艺决策的关键。依据零件形状特征信息模型,建立零件形状特征实例表示模型,提出基于工艺相似的零件实例多层次检索方法。分析了基于工艺相似的零件形状特征间的可比性,给出了复合特征层、基本特征层和简单特征层的零件形状相似度计算和零件实例检索方法,并以箱体零件为例验证了复合特征层零件形状相似度计算方法的有效性。
Case representation and similar case retrieval were the keys to the CAPP technology decision based on case reasoning. A case representation model of part shape feature was built based on information model of part shape feature. A multilayer part case retrieval method was proposed, which was based on process similarity. The comparability between part shape features was analyzed based on process similarity. The part form similarity calculation and part case retrieval methods in compound feature layer, basic characteristic layer and simple feature layer were presented. The validity of this part case retrieval method on compound feature layer was verified by an example of box part.
出处
《机床与液压》
北大核心
2012年第1期42-47,共6页
Machine Tool & Hydraulics
基金
广西自然科学基金资助项目(0832264)
关键词
工艺相似
复合特征
基本特征
简单特征
实例检索
Process similarity
Compound feature
Basic characteristic
Simple feature
Case retrieval
