共查询到20条相似文献,搜索用时 281 毫秒
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以研究院所和企业的合作事例为基础,将汽车车身覆盖件拉深模具CAE分析模型的几何信息到通用CAD/CAM平台的顺畅传递,以及应用CAM系统对模具进行数控加工建模与仿真的实现过程做实例,表明了在国内汽车设计制造企业中实现CAD/CAE/CAM集成应用的可行性和有效性. 相似文献
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本文阐述了北京第一机床厂在CIMS环境下,通过对零件特征的分析,提出了一种实用的描述产品零件的方法,在此基础上实现了回转体零件的CAD/CAPP/CAM集成系统的开发。重点论述了该系统的总体框架设计和主要功能:CAD特征定义及描述;基于商品CAD软件ICEMDDN之上的特征造型;应用通用专家智能系统开发工具,建立工艺知识库模型及推理系统;经相应的后置处理实现NC程序的自动生成及以ORACLE.EDL为柱心的工程数据库管理系统。 相似文献
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陈少甫 《成组技术与生产现代化》1990,(1):17-21
本文叙述了回转体零件的CAD/CAPP集成系统的工作原理和工作过程,强调指出:反映几何特征和加工特征的基本几何形体单元是实现CAD与CAPP内在联系的桥梁,关键在于合理地建立CAD模型和在CAPP中有效地处理零件的信息。为适应多用户的需要,必须实现系统标准化、结构通用化、目的程序模块化。同时要考虑与CAM的连接问题,以便逐步过渡到CAD/CAPP/CAM集成制造系统。 相似文献
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在分析数控编程KBE系统各模块相互联系的基础上,构建了基于KBE的复杂零件数控编程系统功能架构和广义知识库结构模型.综合数据库技术和知识库理论,建立了数控编程广义知识库系统.阐述了广义知识库的设计思想,给出了数控编程广义知识库与UG CAD/CAM应用接口实现的技术路线.并以企业需求为背景,在知识驱动型制造平台(UG CAD/CAM)上,利用VC++6.0和UG/Open,将广义知识库系统和UGCAD/CAM无缝集成,实现了KBE和UG CAD/CAM系统的融合,开发了复杂零件数控编程KBE系统,验证了课题研究的可行性和实用性. 相似文献
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I.O. Sanya 《国际生产研究杂志》2013,51(20):6192-6215
This paper presents the development of a novel knowledge-based engineering (KBE) framework for implementing platform-independent knowledge-enabled product design systems within the aerospace industry. The aim of the KBE framework is to strengthen the structure, reuse and portability of knowledge consumed within KBE systems in view of supporting the cost-effective and long-term preservation of knowledge within such systems. The proposed KBE framework uses an ontology-based approach for semantic knowledge management and adopts a model-driven architecture style from the software engineering discipline. Its phases are mainly (1) Capture knowledge required for KBE system; (2) Ontology model construct of KBE system; (3) Platform-independent model (PIM) technology selection and implementation and (4) Integration of PIM KBE knowledge with computer-aided design system. A rigorous methodology is employed which is comprised of five qualitative phases namely, requirement analysis for the KBE framework, identifying software and ontological engineering elements, integration of both elements, proof of concept prototype demonstrator and finally experts validation. A case study investigating four primitive three-dimensional geometry shapes is used to quantify the applicability of the KBE framework in the aerospace industry. Additionally, experts within the aerospace and software engineering sector validated the strengths/benefits and limitations of the KBE framework. The major benefits of the developed approach are in the reduction of man-hours required for developing KBE systems within the aerospace industry and the maintainability and abstraction of the knowledge required for developing KBE systems. This approach strengthens knowledge reuse and eliminates platform-specific approaches to developing KBE systems ensuring the preservation of KBE knowledge for the long term. 相似文献
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为了提高企业对市场的响应能力,满足用户多样化、个性化的需求,设计者常常需要借鉴一些相似产品的设计范例.为此本文介绍了KBE技术的结构层次,并将其应用到机械产品的设计中去.通过基于知识的数字化建模,在相似产品的基础上设计出可以知识复用的产品模板,从而为设计者提供正确有效的设计工具. 相似文献
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基于层次语义特征的复杂产品工业设计研究 总被引:3,自引:3,他引:0
目的为实现复杂产品工业设计多层语义整合与创新,促进多学科知识共享与协同,提高产品品质。方法基于产品符号学和认知语义学理论,提出产品工业设计层次语义概念,基于复杂产品开发流程与信息加工理论,构建层次语义工业设计过程情境模型。使用感性工学、动作分析等科学表义方法和产品语义学比喻的艺术表义方法提取特征,构建具体设计情境。结论得到了复杂产品图标语义特征、指示语义特征、象征语义特征及其关联,通过系谱轴与比邻轴情景区间中特征要素构成的设计线索和遗传组合、突变、隐喻的策略指导设计,取得良好的实践效果。 相似文献
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数控编程KBE系统的基础性使能技术研究 总被引:1,自引:1,他引:0
针对数控编程领域知识的特点,对KBE系统实现的基础性使能技术进行了研究,介绍了基于实例和规则的数控编程领域知识表示方法和知识获取的概念、途径及过程,阐述了CBR在复杂零件数控编程中的应用,提出了以人工知识获取为主、机器学习为辅的数控编程领域知识获取方式和基于双向混合推理控制策略的CBR/RBR集成数控编程领域知识推理方法,研究成果在开发的原型系统中得到了应用,证明方法可行. 相似文献
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产品协同开发过程具有层次性、分布性、离散性和动态性等特点,采用合理方法构建其有效的过程模型成为协同开发过程管理与优化的基础性条件.将有色Petri网(CPN)技术引入产品协同开发过程建模中,针对性地提出了产品协同开发过程CPN模型的描述性定义;并从协同开发特点出发,为支持基本过程逻辑的描述由工作流原语定义了基本网模型结构;为了描述复杂协同关系,结合模块化方法及库所变迁性质给出了扩展网模型结构的构建方法.该方法实现了将协同开发过程关系从基本到复杂都能映射到相应CPN网上,并通过实例进一步说明了该方法的有效性. 相似文献
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Product development is a highly creative and knowledge-intensive process that involves extensive information and knowledge exchange and sharing among geographically distributed teams and developers. How to best integrate such heterogeneous product knowledge has become an extremely important knowledge management (KM) subject associated with product development. Product development knowledge integration and sharing is becoming a key issue in the enterprise KM. This paper addresses the challenges of product development knowledge integration and sharing during product development. The aim of this research work effort is to develop a method to enhance the integration and sharing of product knowledge during the development phase. This study presents a systematic approach to developing knowledge integration and sharing for product development. The proposed approach includes the steps for designing a framework of product development knowledge sharing, developing representation model for product development knowledge, designing product development knowledge sharing process, designing product development knowledge integration ontology, developing knowledge integration and sharing method for product development based on ontology, and implementation of product development knowledge integration and sharing method. The proposed method could bring out an efficient and proactive way for knowledge integration and sharing among product developers in the product development process. 相似文献