STEP和XML技术在制造业信息化中的应用

在制造业信息化实施中,必然会应用网络技术,要求产品信息的集成和共享扩展到不受时间和空间的限制。STEP可以成为设计和制造之间的桥梁,而XML则是网络数据的载体。根据产品制造的需要,将CAD系统的输出以相应STEP中性文件的形式存储起来,以利用STEP技术共享制造过程中的产品信息,但是它不能在网络上显示和表达。通过STEP-SML的转换过程,建立XML Schema库,将STEP所存储和表达的产品数据再以XML的形式存储和表示在网络上,最终可以利用XML实现多系统之间产品数据的网络传输。     

产品敏捷设计支持系统中的集成与数据交换技术

阐明了基于协同与商务的产品敏捷设计方法.叙述了采用网格服务的集成技术,该技术可以有效地屏蔽企业间设计资源和应用系统的异地、异构和动态特性,实现广域网环境下设计资源和应用系统的松散耦合集成,构建了产品信息模型及其XML模式表达,提出了利用STEP与XML的映射转换机制实现产品图形信息交换的方法,同时给出了基于XML的产品非图形信息的数据交换方法.介绍了产品敏捷设计支持系统的集成功能模型和实现集成的技术系统结构,给出了产品图形信息交换的实例.     

产品信息模型及其管理工具的研究与开发

以产品信息模型为出发点,基于STEP／AP建模技术,对支持产品全生命周期信息共享的产品数据集成技术进行研究,提出集成产品数据模型创建及其管理框架。其思想对于CIMS技术继续发展和产品数据技术的普及均有重要意义。     

基于STEP的CAx信息管理与系统集成的研究

结合制造业实施CIMS的整体设计要求，提出了基于STEP集成技术设计新型CAx信息管理与集成系统（CAx-IMIS)的基本构架，全面分析了这一系统应具备的基本功能，以Pro/E工具软件为基础，建立、管理零件信息模型，基于SDAI生成STEP中性文件实现数据交换的基本思路，探讨了在产品全生命周期内产品数据在CAx系统间的交换与共享。     

TCP／IP技术在监测系统中的应用

针对工业电磁环境监测系统中测点位置变化性强的特点,考虑到LabVIEW中动态创建控件的不足,提出了一种基于网络TCP/IP技术的数据传输方法,实现了LabVIEW和Delphi两种开发平台之间的数据实时传输与共享,为现场工业电磁环境监测的实现提供了保证.该方法实现简单、运行可靠,灵活性强.     

谈大企业厂区测绘数据网络化管理模式

传统的基建、测绘数据管理模式制约着数据应用的便捷性和数据的共享范围,系统应用whip控件和WEB技术对AutoCAD电子文件、数据进行统一管理,结合网络技术的数据传输与存储功能,建立了基于网络信息服务的厂区基建、测绘数据的分发共享平。     

基于XML的数据库统一的研究

讨论如何利用关系数据库存储XML数据和文档,如何利用关系数据库直接支持XML数据查询,最终建立一个基于XML的、统一的Internet数据库平台的方案.XML存储管理和XML搜索引擎是实现XED的核心问题.     

网络化设计和制造信息共享中的STEP和XML技术

在网络化设计和制造中 ,各个协同工作用户所使用的系统类型具有不确定性 ,随之而产生的一个重要问题 ,就是如何通过互联网来实现异质系统之间的信息集成问题 .本文提出了一种新的理论方法 ,该方法建立在STEP和XML基础上 ,可以使网络化制造中的CAD系统之间、CAM系统之间、以及CAD和CAM系统之间通过互联网实现信息共用 .文章介绍了相关的STEP标准和XML概念 ,以及相对应的EXPRESS和DTD标准 .同时详细介绍如何将STEP和XML作为中性格式模型集成在一起的思路 ,最后 ,提供了一个建立在STEP和XML基础之上的系统框架     

产品物料清单BOM的XML实现方法研究

针对产品物料清单(BOM)的复杂性、多样性、灵活性等特点,结合XML所具有的特点,提出了基于XML的BOM树的建立方法,由此有效地实现了数据的查询、修改和删除等操作.论文分析了产品全生命周期各阶段BOM数据的特点、演变过程;详细阐述了产品BOM结构的XML的建立优势;产品BOM树的XML模式的设计和实现;以及各种BOM视图之间的转化和BOM数据的交换.重点介绍了.Net Framework环境下BOM树的实现机制.     

基于可扩展置标语的多方数据通信安全模型探析

在对现有的XML安全规范做分析研究后,针对基于XML网络通信技术的业务链的多方数据通信过程中XML数据安全问题,提出一种基于XML安全技术与模型。     

Towards a generic product modelling framework

In response to the current rapidly changing manufacturing environment, product modelling technology has been widely applied to provide the essential information for product development (PD) processes. The traditional product modelling technologies are unable to support the information exchange and share in various stages of PD processes that could be taken place among departments in a company or even among companies in distributed manufacturing environment. This has caused many problems such as information loss, data format incompatibility and reduced efficiency and effectiveness of product data applications. This has consequently created bottlenecks for the integration of PD processes. In this paper, a generic product modelling framework (GPMF) is proposed to overcome the abovementioned problems in today's manufacturing environment. This framework uses the standard for the exchange product model data (STEP) as a foundation. It consists of four functional components: an EXPRESS data model namely EDM; a STEP–based modelling environment; a “five-phase” modelling method; and three EDM data exchange and sharing methods. Case studies show that the product models built based on the GPMF are capable of integrating information in product design, manufacturing and assembly. The GPMF is compatible, comprehensive, and flexible, and is able to support information exchange and sharing.     

应用成组技术实现制造敏捷化、分散化、网络化

本文分析了敏捷化、分散化、网络化制造与应用成组技术之间的关系，提出了应用成组技术实现敏捷化、分散化、网络化制造的方法，探讨了我国制造企业基于成组技术的敏捷生产组织构建方法以及敏捷制造单元的成组与重构技术，为我国中小企业特别是离散型制造企业实现敏捷化、分散化、网络化制造作了有益探索。     

ISO10303-compliant computer-aided wheel-rim design system - the framework and data model

This paper focuses on developing a framework for a computer-aided part design system that considers design efficiency and facilitates product information sharing across the automotive supply chain. The system applies the concept of feature-based design to enhance the efficiency and effectiveness of auto-part design and implements the standard exchange of product (ISO10303/STEP) data model to enable the data sharing between original equipment manufacturers (OEMs), suppliers and customers. This research demonstrates the technology of standard data modelling for a feature-based CAD system to achieve cross-platform CAD/CAM integration. The framework supports technical data interchange (TDI) using international data standard to enable the concept of virtual engineering community and collaboration.     

基于ASP的网络化制造平台研究

为了解决中小企业群的信息化建设问题,研究了基于ASP(Application Service Provider,应用服务供应商)模式的网络化制造平台的关键技术及其实现方案。通过分析中小企业群的构成模式,提出了分别以专业、产品和业务组合为核心的三种基于ASP的网络化制造平台的体系结构,研究了以增值服务链为核心的资源共享,以及面向产品生命周期的业务协同。在综合分析J2EE和．NET技术架构的基础上,提出了基于Web Service网络化制造平台集成方案。     

装配工艺信息建模技术在信息集成中的应用

为了解决制造行业中异构系统间的装配工艺信息交互问题,建立了基于IDEF1x的装配工艺信息模型,本信息模型描述了装配工艺规划过程中的产品、工艺、资源信息,阐明了基于1DEF1x的装配工艺信息的表现形式及其特点．以DELMIA（数字企业精益制造交互式应用）系统为实例,基于本信息模型,通过DELMIA二次开发技术访问、操纵并且组织制造数据库中装配工艺信息．给出了2种实现工艺信息交互的途径：XML（可扩展的标识语言）技术和oracle数据库应用．并利用实例说明了本文建立的装配工艺信息模型在DELMIA系统中的有效性．     

Processing of 3D sheet metal components in STEP AP-203 format. Part I: feature recognition system

To automate planning activities in a computer integrated manufacturing environment, an integrated system of feature recognition and reasoning is essential. An attempt is made in the present work to develop such a system for 3D sheet metal components. Though certain part-modellers use feature-based methodology, they lack the information required for manufacturing and entire feature information is lost when converted to a neutral format such as STEP AP-203. The proposed feature recognition identifies manufacturing features in a generic manner, while feature reasoning gives the information required for manufacturing. Taking 3D model data in STEP AP-203 format as input to the feature recognition system, the central plane of the component is first generated. Further processing of faces is carried out and various features with similar manufacturing attributes are identified using a set of rules based on the topology, geometry and Boolean logic. Different types of manufacturing features such as cut, stretched, drawn and bent features as well as composite features are effectively identified irrespective of their shape. The system proposed here was tested with components taken from industry and examples available in the published literature. The proposed feature recognition system serves as input to the feature reasoning system dealt with in Part II of this work (Kannan, T.R. and Shunmugam, M.S., Processing of 3D Sheet metal components in STEP AP-203 format. Part II: feature reasoning system. Int. J. Prod. Res., 2009 (in press)).     

Research of Enterprise Resource Management Supporting Networked Manufacturing

1Introduction Withthecomingoftheknowledge driveneconomy,manufacturingisdevelopingintermsofdigitization,flexibility,intelligence,integration,agilityandnetworking[1,2].Networkedmanufacturingmeansthat manufacturingenterpriseslaunchaseriesofactivitiessuchasproductdesign,manufacture,marketing andmanagementinthewayofnetworkedtechnology[3].Byanalyzingthecorrelativeresearchabroadand domestic,wemaysummarizethedevelopmenttrendofnetworkedmanufacturingasfollows[4～6]:(1)Thescopeofanetworkedmanufacturingsy…