共查询到18条相似文献,搜索用时 156 毫秒
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结合液压集成块产品模型的建立过程,介绍了特征建模技术中的特征定义、特征分类、特征描述和特征库的建立,建立了面向对象的液压集成块产品特征模型。该模型描述了液压集成块零件设计和制造的有关信息,为CAD/CAM集成提供了一个统一的产品信息模型。 相似文献
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基于STEP的信息建模技术研究 总被引:1,自引:0,他引:1
罗燕 《组合机床与自动化加工技术》1998,(1):39-43
本文分析80年代以来提出的并行工程、精益生产、智能制造等先进制造技术的特点,认为实现CAD/CAM的真正集成,必须采用统一的信息模型,而基于STEP的信息模型可满足产品生命周期各阶段对信息的需求。为此,本文在探讨了产品生命周期信息需求特点及国内外在此方面的研究进展后,提出了一面向21世纪的制造技术——基于STEP的系统模型,并针对模具给出了IDEF0的描述。 相似文献
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冷挤压工艺规划的集成系统研究 总被引:4,自引:0,他引:4
冷挤压成形工序设计通常是由经验丰富的模具设计人员根据已有的设计和工艺规则及其经验进行的。本文介绍了一基于特征的集成CAD/CAPP/CAE的冷挤压工艺规划专家系统的结构。该系统包含了基于特征的产品模型建立、可行性分析、工艺规划和工艺评价等模块,并分别对各模块的特点和功能进行了介绍。 相似文献
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孙翱 《组合机床与自动化加工技术》1998,(6):15-18
将产品数据表达和交换的国际标准STEP应用于信息集成,是实现开放系统互连的关键技术,从而达到CAD/CAM信息集成系统中数据的交换和共享。基于特征的产品信息模型的建立是信息系统集成的核心。本文比较了几种集成方法,并介绍了广义CAD/CAM信息集成的过程和最新进展情况。 相似文献
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基于特征的产品模型及产品建模系统 总被引:1,自引:0,他引:1
基于特征的产品模型是CAD/CAPP/CAM集成以至CIMS实现的关键技术。文中提出了基于特征的产品模型结构,讨论了集成化的CAD/CAM系统对特征造型系统的要求,提出了基于特征的产品建模系统的结构。 相似文献
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CAD/CAM已被模型和模具制造商最重要的客户-电视机行业所广泛接受。有效而充分应用该技术,需要建立接口,优良的设计是产品美观的需要,也是生产模型和模具制造的基础,数据的接受和处理有助于提高CAD/CAM的效率。着重介绍苏州飞利浦消费品电子有限公司21″彩电全模具制造的一些处理方法。 相似文献
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变动设计是为了克服传统CAD系统的缺点而发展起来的一种CAD新技术它着重强调产品模型建模与修改的方便性,强调产品模型内部各子部分之间的联系和产品与产品之间的邮多个产品的关联设计与联动修改。本文首先分析了传统CAD系统的设计流程与存在缺点。 相似文献
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Many eco design tools and product assessment methods have been developed to improve the environmental performance of products during design stage. Despite the efforts made at the product level, environmental impact in our society is increasing due to environmental impact associated with increased product volume. This article presents a new methodology for product life cycle design assessment to predict the total impact caused in the society by forecasting the market growth of emerging product technologies. A number of products were used to prove the validity of the proposed model and demonstrate the usefulness of the methodology. 相似文献
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机械产品模型的研究与进展 总被引:2,自引:0,他引:2
首先介绍了产品模型的起源与发展;然后对产品模型的研究现状进行踪述,主要包括产品模型的定义、产品模型的研究现状、过程模型的研究、产品建模技术和工具、产品模型与过程模型的相互关系等5个方面;其次分析了目前产品模型技术中所存在的不足;最后指出了产品模型技术的未来发展趋势。 相似文献
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产品尺寸和几何技术规范(Dimensional and Geometrical Product Specification and Verification,GPS)是有关产品几何特性的一系列技术标准,它贯穿于产品的研究、开发、设计、制造、验收到使用和维护的全过程。本文介绍了新一代GPS标准体系表面模型的概念及其数字化描述方法,探讨了基于新一代GPS的表面模型的操作技术。其中几何要素、特征、恒定类和恒定度等概念的引入,为实现几何技术规范的数字化描述、设计、评定与控制提供了必要的理论基础。有效地解决了产品更新换代在功能描述、规范设计和认证评定全过程中数学表达规范统一的难题。 相似文献
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New Trends in Rapid Product Development 总被引:1,自引:0,他引:1
Alain BernardA. Fischer 《CIRP Annals》2002,51(2):635-652
This keynote paper presents an overview of new approaches in rapid product development from the design point of view. The evolution of the market has necessitated the reduction of time-to-market, mainly because the product life cycle is shorter, but also because it is very important to proceed more rapidly from an initial conception to a mass production object. As a result of newly evolved software environments, knowledge-based systems, and product data management, processes for integrated design and manufacturing for new products have emerged. Due to this evolution of rapid prototyping technologies, it has become possible today to obtain parts representative of mass production within a very short time. This keynote paper provides an overview of the actual trends in all the components that affect the speed and efficiency of product development, in particular all the possibilities available to the designer, from the earliest stages of a product's life cycle. 相似文献
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E. Westkämper 《CIRP Annals》2003,52(2):579-588
Industrial companies change the paradigms of business operations from optimisation of manufacturing processes to optimisation of products life cycles in order to activate the value of products, taking into account the potentials of product services in all phases of each product's life. From design to the end of their life capital intensive products, like manufacturing or assembly systems, are linked to a manufacturer network by global communication systems. This network allows special services even in the phases of usage and recycling. For this new paradigm it is necessary to develop strategies, methods and technologies to manage the business processes and the information and knowledge required in all phases of a product's life and to industrialise the processes of design, assembly, usage, service and remanufacturing by disassembly and recycling. It is the objective of this paper to define the processes for management of life cycle with a focus on assembly, service and disassembly of capital intensive products. 相似文献
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Peter Groche Wolfram Schmitt Andrea Bohn Sebastian Gramlich Stefan Ulbrich Ute Günther 《CIRP Annals》2012,61(1):163-166
Guidelines of the design for manufacturability (DfM) hardly regard neither specific positive effects nor additional functional convenience achievable by specific manufacturing technologies. Consequently, opportunities for design quality improvements are wasted. The paper introduces a new approach in terms of connecting methods of product design, mathematical optimization, process planning and forming technologies, which inherently change material properties of the workpiece. By providing manufacturing-induced properties at an early stage of product design additional functionality can be generated and product complexity reduced. Due to the algorithmic approach design solutions based on different manufacturing technologies can be efficiently compared in mature development stages. 相似文献
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针对传统生产模式下的制造企业在客户定制设计和制造中面临的问题,提出了一种面向大规模定制生产模式的产品快速设计系统开发和实施的策略。对产品快速设计中涉及的面向设计的知识表示、基于知识的产品模型构建技术、模块化设计技术、产品信息管理等关键技术进行了讨论。 相似文献