Some key issues in supporting collaborative design in product data management（PDM ） system and 3D computer aided design（CAD） system integrated environment are analyzed. The general architecture of the integrated e...Some key issues in supporting collaborative design in product data management（PDM ） system and 3D computer aided design（CAD） system integrated environment are analyzed. The general architecture of the integrated environment is divided into five tiers and employs the transparently integrated mode, with the mode, function calling and information exchanging among independent PDM and CAD processes are carried out via message translation /parse approach. Product layout feature（PLF ） model definition is presented, PLF model is used to represent design intention at the preliminary design phase. The collaborative design methodology employing the PLF model in PDM/3D CAD integrated environment is analyzed. The design methodology can speed up the design process, reduce the investment and improve the product quality.展开更多
An algorithm for compensating the varying section contour within the extent of each layer thickness is proposed to improve the rapid prototyping part’s shape and size precision.
3D CAD模型长期保存困难重重。为此,国际航空工业界推出LOTAR(LOng Term Archiving and Retrieval)项目,旨在建立、测试、颁布并维护3D CAD模型长期保存和获取所需要的标准,目前其主要成果是NAS/EN 9300系列标准。而汽车工业产品数据标...3D CAD模型长期保存困难重重。为此,国际航空工业界推出LOTAR(LOng Term Archiving and Retrieval)项目,旨在建立、测试、颁布并维护3D CAD模型长期保存和获取所需要的标准,目前其主要成果是NAS/EN 9300系列标准。而汽车工业产品数据标准战略联盟通过LTAR(Long Term Archiving&Retrieval of Digital Product Definition Data,LTAR)项目已经形成了一套完整的建议体系,包括四个部分:文件格式、存取流程、保存时间、质量保证。目前,国内还未有国家或行业层面的3D CAD模型长期保存策略。借鉴电子文件前端控制和全程管理的思想,通过3D CAD模型生成时的模型质量控制措施、流转过程中的更改和版本控制以及归档后的物理与逻辑实体控制措施,确保3D CAD模型长期可读、可理解。展开更多
基金Supported by the National High Technology Re-search and Development Programof China(2003AA411011)
文摘Some key issues in supporting collaborative design in product data management（PDM ） system and 3D computer aided design（CAD） system integrated environment are analyzed. The general architecture of the integrated environment is divided into five tiers and employs the transparently integrated mode, with the mode, function calling and information exchanging among independent PDM and CAD processes are carried out via message translation /parse approach. Product layout feature（PLF ） model definition is presented, PLF model is used to represent design intention at the preliminary design phase. The collaborative design methodology employing the PLF model in PDM/3D CAD integrated environment is analyzed. The design methodology can speed up the design process, reduce the investment and improve the product quality.
基金Supported by College Science Foundation of Jiangsu(07KJB460113)
文摘An algorithm for compensating the varying section contour within the extent of each layer thickness is proposed to improve the rapid prototyping part’s shape and size precision.
文摘3D CAD模型长期保存困难重重。为此,国际航空工业界推出LOTAR(LOng Term Archiving and Retrieval)项目,旨在建立、测试、颁布并维护3D CAD模型长期保存和获取所需要的标准,目前其主要成果是NAS/EN 9300系列标准。而汽车工业产品数据标准战略联盟通过LTAR(Long Term Archiving&Retrieval of Digital Product Definition Data,LTAR)项目已经形成了一套完整的建议体系,包括四个部分:文件格式、存取流程、保存时间、质量保证。目前,国内还未有国家或行业层面的3D CAD模型长期保存策略。借鉴电子文件前端控制和全程管理的思想,通过3D CAD模型生成时的模型质量控制措施、流转过程中的更改和版本控制以及归档后的物理与逻辑实体控制措施,确保3D CAD模型长期可读、可理解。
