Extraction of geometric characteristics for manufacturability assessment

Yuh Min Chen, Chiun Cheng Wen, Chengter Ted Ho

研究成果: Article同行評審

27 引文 斯高帕斯(Scopus)

摘要

One of the advantages of feature-based design is that it provides data which are defined as parameters of features in readily available forms for tasks from design through manufacturing. It can thus facilitate the integration of CAD and CAM. However, not all design features are features required in down stream applications and not all parameters or data can be predefined in the features. One of the significant examples is property that is formed by feature interactions. For example, the interaction of a positive feature and a negative feature induces a wall thickness change that might cause defects in a part. Therefore, the identification of the wall thickness change by detecting the feature interaction is required in the moldability assessment. The work presented in this paper deals with the extraction of geometric characteristics in feature-based design for manufacturability assessment. We focus on the manufacturability assessment of discrete parts with emphasis on a net shape process - injection molding. The definition, derivation and representation of the spatial relationships between features are described. The geometric characteristics formed by feature interactions are generalized as significant items, such as "depth", "thickness", "height" etc. based on the generalization of feature shapes. Reasoning on feature interactions and extraction of geometric characteristics is treated as a refinement procedure. High-level spatial relationships - "is_in", "adjacent_to" and "coplanar" as well as their geometric details are first derived. The significant items formed from feature interactions are then computed based on the detailed spatial relationships. This work was implemented in a computer-aided concurrent product and process development environment to support molding product design assessment.

原文English
頁(從 - 到)371-385
頁數15
期刊Robotics and Computer-Integrated Manufacturing
19
發行號4
DOIs
出版狀態Published - 2003 8月

All Science Journal Classification (ASJC) codes

  • 控制與系統工程
  • 軟體
  • 一般數學
  • 電腦科學應用
  • 工業與製造工程

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