Indexing and retrieval in machining process planning using case-based reasoning

H.-C. Chang , L. Dong , F.X. Liu , W.F. Lu
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引用次数: 48

Abstract

To reduce the manufacturing time of a product, one effective way to develop a machining process plan for a new part is to retrieve a relevant case of process planning similar to a new desired part and then adapt the retrieved case to meet the new requirements. This paper proposes a mechanism for retrieval of process planning cases. The core of the retrieval mechanism contains: (1) a feature-based representation of a part and cutting processes; (2) indexing of a part; (3) a feature hierarchical structure based on cutting processes; and (4) a similarity metric used to measure the similarity between a new desired part and any old part in the case base. The application domain here is for axisymmetric part machining. A prototype based on the retrieval mechanism is implemented on a Sun workstation using the ACIS 3D-Toolkit from Spatial Technology Inc.

基于案例推理的加工工艺规划索引与检索
为了缩短产品的制造时间,制定新零件加工工艺计划的有效方法之一是检索与新零件相似的相关工艺计划案例,然后对检索到的案例进行调整以满足新要求。本文提出了一种工艺规划案例的检索机制。该检索机制的核心包括:(1)基于特征的零件和切削过程表示;(二)零件的标引;(3)基于切削过程的特征层次结构;(4)相似度度量,用于度量新期望部件与案例库中任何旧部件之间的相似度。这里的应用领域是轴对称零件的加工。利用空间技术公司的ACIS 3D-Toolkit,在Sun工作站上实现了基于该检索机制的原型。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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