共查询到18条相似文献,搜索用时 154 毫秒
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KBE技术在汽车覆盖件拉深工序件设计中的应用 总被引:1,自引:1,他引:1
拉深工序是汽车覆盖件成形的关键工序,拉深工序件的设计是覆盖件模具设计的一个瓶颈环节.为了解决覆盖件冲压工艺设计过程中经验和知识缺乏的问题,研究了知识工程技术(KBE)的实现机理和应用方法,通过总结覆盖件拉深工序件设计的知识和经验,建立了基于KBE的拉深工序件知识模型.通过将设计准则、经验和工艺约束等知识融入拉深件设计的各个组成要素中,实现了拉深工序件设计过程中知识的表达和知识的推理.在上述研究的基础上,以UG软件为平台,开发了基于知识的覆盖件拉深模具型面设计系统.KBE技术在拉深件设计的成功应用,提高了拉深件设计的自动化和智能化程度. 相似文献
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阐述了我国锻造生产线现状,介绍了国内外统计过程控制研究和应用的概况,指出在我国锻造生产环境中实施统计过程控制所面临的困难。基于工序单元采用约束理论对锻造生产过程进行分析,寻求瓶颈环节或关键环节作为监控重点;将质量管理工具SPC分析方法应用于锻造生产过程,实时监控瓶颈环节或关键环节,通过局部优化最终得到整个生产过程的稳定;根据模锻生产的特征以及SPC分析方法中定义的5大影响因素搭建专家知识库,利用主流的机器学习算法进行知识的获取。基于以上研究,设计基于数据驱动的全流程模锻生产过程专家系统,用以实现模锻生产过程全流程的实时监控、稳定性分析以及生产过程的优化。 相似文献
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通过对模具企业生产流程及特点的调查分析,针对模具企业生产过程中知识的获取及管理困难等问题,对工作流技术在模具企业知识获取与管理中的应用进行了研究。提出基于工作流的知识获取方法,在此基础上设计并开发了基于工作流的模具企业知识管理系统,给出了系统的架构、功能及实现机制。系统有效地实现了模具企业生产过程中知识的获取与管理。 相似文献
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注塑模设计具有很大的经验性,开发基于知识的注塑模概念设计系统具有很重要的意义。基于知识推理的关键是制品信息的确定、知识的获取和表达,提出了以注塑制品设计信息为设计前提的基于知识的注塑模概念设计系统,建立了注塑制品的信息模型与模具结构信息模型,论述了知识的分类及表示方法,并给出了求解策略。 相似文献
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Juipeng Tang Soo-Ik Oh Taylan Altan Richard A. Miller 《Journal of Materials Shaping Technology》1988,6(1):7-17
This paper describes a method and a system to automate the design of forging geometries. The method is derived from the principles and the actual practices of forging design used by experienced forging designers. Due to the diversity of the knowledge and problem solving techniques required for forging design, a combination of knowledge-based and algorithmic techniques was employed to implement the AFD (automated forging design) system. Given a set of design specifications, that is, machined part geometry, processing conditions, and special design considerations, the AFD system designs the forging section geometry automatically. Initial results from AFD show that it can be a powerful tool for designing geometries for the rib-web type of forgings. 相似文献
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R. Hunter J. Rios J.M. Perez A. Vizan 《International Journal of Machine Tools and Manufacture》2006,46(6):683-697
The design of machining fixtures is a highly complex process that relies on designer experience and his/her implicit knowledge to achieve a good design. In order to facilitate its automation by the development of a knowledge-based application, the explicit definition of the fixture design process and the knowledge involved is a prior and a fundamental task to undertake. Additionally, a fundamental and well-known engineering principle should be considered: the functional requirements and their associated constraints should be the first input to any design process. Considering these two main ideas, this paper presents the development undertaken to facilitate the automation of the fixture design process based on a functional approach.In this context, the MOKA methodology has been used to elicit fixtures knowledge. IDEF0 and UML have been used to represent the fixture design process. A methodology based on the function concept and aiming to formalize such design process is proposed. Fixture functional requirements have been defined and formalized. Functional fixtures elements have been used to create a functional design solution, the link of these elements with the functional requirements and with typical commercial fixture components has been defined via tables and rules mapping. And finally, a prototype knowledge-based application has been developed in order to make an initial validation of the proposed methodology. 相似文献
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基于知识的产品概念设计支持系统研究 总被引:1,自引:0,他引:1
张淑兰 《组合机床与自动化加工技术》2004,(12):39-41
从产品开发的视角,分析计算机辅助概念设计的过程.结合基于知识的工程环境(KBE),研究知识驱动概念设计的方法,以捕捉更多的设计意图,增加非几何的工程设计能力.探讨基于知识的产品概念设计支持系统的体系结构,并研究其实现的关键技术-知识的表示与获取和设计仿真与评价等.研制支持产品概念设计的原型系统,并通过减速器产品开发示例予以验证. 相似文献
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K. R. Vemuri S. I. Oh T. Altan 《International Journal of Machine Tools and Manufacture》1989,29(4):505-518
In closed-die forging with flash, design of blockers is of critical importance. However, while finite element method-based computer simulation programs are gaining wider acceptance to evaluate completed die designs, actual die design itself still remains predominantly manual because determination of the proper blocker configuration is a very difficult task, an art acquired only through years of experience. Efforts to computerize blocker design so far are primarily based either on interactive graphics, or a set of fixed design procedures which do not take into account design variations due to geometry and/or process variables. This paper describes the development of an automated blocker design system named BID (Blocker Initial-guess Design), developed using the knowledge-based systems approach, which attempts to take these design variations into consideration. 相似文献