以产品结构为核心的工艺信息模型研究

对以产品结构为核心的工艺信息模型进行了研究，建立了一种工艺信息模型体系。在该模型中，利用过程处理方法获取零件产品的图纸信息，并利用所获得的零件信息组建产品结构树，以进行工艺信息的组织和管理；并且讨论了该模型所涉及到的一些关键技术。     

IIE环境下一种基于STEP的产品信息组织方法

针对IIE环境下产品信息共享与集成的特点,提出了一种基于STEP的产品信息组织方法。通过基于STEP的产品结构信息建模,以产品结构树为骨架,实现了面向产品全生命周期的产品信息管理模式,为研制基于Web的CAx系统、PDM系统及实施协同设计、敏捷制造等先进生产模式提供了理论和技术基础。     

航空离散制造企业质量管理系统的设计

本文在分析某离散制造企业质量管理系统需求的基础上,建立构建了离散制造企业质量管理系统,提出离散制造企业质量管理系统的标准结构模型     

面向降低成本求解的产品成本建模

对成本估算模型和降低成本模型进行了对比，指出二者的应用对象不同，而且降低成本模型是以成本估算模型为基础的产品信息更深层次的表达模型．提出集成产品结构树、成本结构及产品设计进程的产品成本模型的层次结构，给出了以产品结构树为基础、嵌套成本结构的产品成本模型的组织形式．以ZUMD-02V油压减振器为例，说明了建模方法的有效性。     

PDM系统中产品结构树的开发研究

产品配置管理通过产品结构树对产品对象及其相互之间的联系进行维护和管理,因此产品结构树是产品配置管理的基础。论文首先讨论了产品结构的分解方法,介绍了产品结构的配置过程,其次分析了产品结构树的实现和BOM表的自动化生成,最后给出了产品结构树的一个实际应用案例。     

基于改进区块链的智能制造安全模型

针对传统区块链智能制造安全模型存在的区块构建和数据查询速度慢、插入查询操作的时间复杂度高等难题,提出了基于改进区块链的智能制造安全模型。首先为了克服传统区块链耗电量大和吞吐量低的弊端,引入新型Merkle Patricia树(MPT)扩展区块链结构,以提供节点状态的快速查询;然后针对MPT不支持并发操作和高负载状态下性能较差的问题,设计无锁并发缓存Merkle Patricia树,支持无锁的并发数据操作,可以提升在多核系统下的效率;最后采用具体仿真实验分析了所提模型的性能。结果表明,改进区块链的智能制造安全模型可以有效降低插入查询操作的时间复杂度,大幅提升区块构建和数据查询的速度,相较于传统模型,获得了更优的整体性能。     

航空制造企业库存有效期管理系统的设计

本文在分析某航空制造企业库存有效期管理系统需求的基础上,建立构建了航空制造企业库存有效期管理系统,提出航空制造企业库存有效期管理系统的标准结构模型,为企业质量管理提供了有效的依据。     

云制造环境下大规模产品定制技术研究

结合云制造及大规模产品定制的特点,提出了一种云制造环境下大规模产品定 制的组织模式以及相配套的需求转换模型。需求转换模型涵盖了完整的需求分解、重组和再 分配过程,对其中的基于产品结构树的需求分解、基于相似性聚类的制造批次重组都进行了 详细阐述,并构建了需求再分配的非线性规划模型,从而可以利用最优化方法实现制造需求 寻优分配。最后,以轮式装载机产品定制为示例,论述了需求转换的详细过程,验证了方法 的有效性和可行性。     

企业安全监控系统报警树的设计与实现

针对报警监控系统普遍存在报警信息太多和报警控制难的问题,提出一种用树型结构来管理报警节点的办法。介绍了报警树的控制方案、类设计、节点拖放策略、报警树的重建、以及报警树同步的实现方法。报警树应用于某水厂的生产安全监控系统,证实是可用作报警策略控制的一种好办法。     

制造品质BOM在车间中的研究与应用

针对航天企业车间质量管理流于形式化、无法对质量数据有效管理的问题,该文基于产品结构和配置关系构建了面向产品的制造品质BOM(MQBOM),描述了MQBOM的概念、作用、构成和生成,以MQBOM体系作为合理有效的质量数据组织形式确保质量数据的有效管理,实现“以数据说话”的车间制造质量数字化管理。     

基于功能本体的设计知识共享平台

为弥补制造业中设计知识在共享和重用方面的缺陷,提出一种基于功能本体的设计知识共享策略。使用功能本体实现现有产品结构到其功能的映射,利用功能分解树表达产品的设计原理。首先,介绍了功能本体的基本框架;然后,分析了功能分解树在产品设计中的作用;最后,通过实现一个家电领域设计知识共享平台,验证所提出的共享策略的可行性。实验结果表明,该策略能有效实现制造业设计知识的信息检索、共享和重用,可以缩短产品的开发周期。     

制造服务逻辑关系确定方法研究

Web服务环境下,为了快速建立制造服务链,提出了一种制造服务逻辑关系的确定方法。首先分析了产品结构、制造任务和制造服务三者之间的关系,提出了基于产品结构建立制造服务链的过程,然后论述了制造任务时序关系的确定方法,定义了基于产品结构的制造服务分类模型,最后给出了制造服务逻辑关系的确定规则。     

Preliminary design and manufacturing planning integration using web-based intelligent agents

Software agents have been increasingly used in the product and process development in industry over the past years due to the rapid evolvement of the Internet technology. This paper describes agents for the integration of conceptual design and process planning. Agents provide mechanisms to interact with each other. This mechanism is important since both of those processes involve negotiations for optimization. A set of design and planning software agents has been developed. These agents are used in a computer-based collaborative environment, called a multi-agent platform. The main purpose of developing such a platform is to support product preliminary design, optimize product form and structure, and reduce the manufacturing cost in the early design stage. The agents on the platform have access to a knowledge base that contains design and planning rules. These rules are derived from an analysis of design factors that influence process and resource planning, such as product material, form, shape complexity, features, dimension, tolerance, surface condition, production volume, and production rate. These rules are used by process planning agents to provide process planners with information regarding selecting preliminary manufacturing processes, determining manufacturing resources, and constructing feedback information to product designers. Additionally, the agents communicate with WEB servers, and they are accessible by users through Internet browsers. During performing design and planning tasks, agents access the data pertinent to design and manufacturing processes by the programming interfaces of existing computer-aided design (CAD) and manufacturing system. The agents are supported by a developed prototype agent platform. The agents and the platform enable the information exchange among agents, based on a previously developed integrated design and manufacturing process object model.     

产品结构化信息树版本管理方法的研究与实现*

针对当前产品结构树生成和更新中存在的数据重复录入问题,给出了产品结构化信息树的定义,能够表达产品任意零部件的产品结构及其关联文档数据,采取文档版本变化驱动产品结构树的版本变化的方法,建立了产品结构化信息树版本模型,提出了一套基于控制锁的版本控制规则,能够对产品结构化信息树的版本变化进行控制,避免了版本冗余。基于版本控制规则,论述了任意零部件文档签出或修订前后产品结构化信息树版本变化的求解方法。按照版本的不同,将项目所属文档按照产品结构树的版本分文件夹地保存在物理硬盘上,便于物理文档的维护和备份。最后通过企     

三维轻量化模型在制造工艺上的应用

由于工艺数据比设计数据更加庞大,同时在产品设计过程使用众多的三维设计软件,工艺如何和三维CAD进行集成,工艺如何基于三维CAD进行加工工艺设计和装配工艺设计,如何利用三维模型的信息完整、可视的独特优势提高工艺编制的质量和效率,并实现产品模型信息的统一,对于数字化制造具有重要意义。文中重点描述使用三维轻量化技术实现工艺设计的原则和应用场景。     

Cloud-based design and manufacturing: A new paradigm in digital manufacturing and design innovation

Cloud-based design manufacturing (CBDM) refers to a service-oriented networked product development model in which service consumers are enabled to configure, select, and utilize customized product realization resources and services ranging from computer-aided engineering software to reconfigurable manufacturing systems. An ongoing debate on CBDM in the research community revolves around several aspects such as definitions, key characteristics, computing architectures, communication and collaboration processes, crowdsourcing processes, information and communication infrastructure, programming models, data storage, and new business models pertaining to CBDM. One question, in particular, has often been raised: is cloud-based design and manufacturing actually a new paradigm, or is it just “old wine in new bottles”? To answer this question, we discuss and compare the existing definitions for CBDM, identify the essential characteristics of CBDM, define a systematic requirements checklist that an idealized CBDM system should satisfy, and compare CBDM to other relevant but more traditional collaborative design and distributed manufacturing systems such as web- and agent-based design and manufacturing systems. To justify the conclusion that CBDM can be considered as a new paradigm that is anticipated to drive digital manufacturing and design innovation, we present the development of a smart delivery drone as an idealized CBDM example scenario and propose a corresponding CBDM system architecture that incorporates CBDM-based design processes, integrated manufacturing services, information and supply chain management in a holistic sense.     

Markov modeling and analysis of multi-stage manufacturing systems with remote quality information feedback

Modeling and analysis of multi-stage manufacturing systems (MMSs) for product quality propagation have attracted a great deal of attention recently. Due to cost and resources constraints, MMSs do not always have ubiquitous inspection, and MMSs with remote quality information feedback (RQIF, i.e., quality inspection operation is conducted at the end of the production line) are widely applied. This paper develops a Markov model to analyze quality propagation in MMSs with RQIF. Analytical expressions of the final product quality are derived and the monotonicity properties are investigated. A quality bottleneck identification method is explored based on the proposed Markov model. The results of case study demonstrate the effectiveness of the proposed model.     

智能化CAPP与PLM相结合在制造型企业中的应用研究

在制造企业中,产品更新换代的速率太快,实现工艺文件的标准化,规范产品制造信息和管理信息是企业发展的难题。本文分析了PLM与CAPP工艺设计的集成模式,介绍了系统工艺设计的主要特点以及功能,阐述了在制造企业中的应用和发展前景。     

Development of an Internet-enabled interactive fixture design system

Fixture design is a complex and an intuitive process. An efficient fixture design system is essential to cut costs and reduce the product lead-time. In today's manufacturing landscape, various computer-aided systems exist to aid the various stages of manufacturing. A fixture design system should be able to transfer information with the various other systems to bring about a seamless product design and manufacturing environment. A fixture design system should also be portable on different operating platforms. This paper addresses the development of an Internet-enabled interactive fixture design system. The Internet and the use of XML as a file format provide a means for the transfer of information and knowledge between the various computer-aided manufacturing systems. The system has been implemented using Java and is based on a three-tier Thin Client-Fat Server architecture. This ensures the platform independent performance of the system. A locating scheme independent interactive fixture design method has also been developed in this work for detailed fixture design.