STEP/XML产品数据模型转换编译系统的实现

以STEP为核心的中性文件数据表达技术,和以XML技术为核心的网络数据表达方式,各有自己的优点.为了在网络化和数字化制造中,解决基于互联网的产品数据传输与共享问题,本文利用STEP与XML两种文件格式之间的转换技术及数据库技术,通过开发STEP/XML编译系统,实现基于网络的产品数据传输与共享,并实现数据的集成.     

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.     

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     

基于XML模式的仪器检定数据交换格式

本文尝试将XML语言应用在电子测量仪器计量检定数据的可复用表达与存储领域，建立基于XML语言的检定数据交换标准格式。由于XML语言在组织层次化数据方面优势突出，并且具有自描述数据的功能，利用XML格式化并存储仪器检定数据，提高了计量检定数据的交换与复用性能。论文研究了面向仪器检定数据可复用表达的XML模式设计，并且讨论了XML与其他记录格式之间的转换关系，最后给出了信号发生器检定数据交换标准格式的XML模式实例。     

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。     

质量驱动的虚拟原型设计关键技术

 依据质量驱动的虚拟原型设计理论,构建基于ACIS的产品虚拟原型设计总体框架, 用C++开发了可从可视化数据库中读出实体, 再加以渲染产品的LINUX可视化系统,并建立了基于STEP标准的产品信息交换模型.在制造物理原型之前,可对产品全生命周期各个方面进行产品分析、评价、决策和修改,实现产品数据管理和设计进程的集成化.     

XML数据交换在基础数据库平台的应用

在五邑大学信息化建设过程中,各职能部门通常采用不同的技术和平台来构建自身的信息系统,使得跨平台数据共享与访问困难,作者利用XML编写程序来实现不同数据库平台、不同应用程序系统、不同操作系统平台之间数据的交换与共享,建立起各职能部门应用系统沟通和对社会服务的接口标准和服务标准,达到跨平台数据交换和共享的目的。     

基于XML技术的数据交换系统在质监系统内的实现

本文针对目前质监系统内部各单位信息系统之间的信息孤岛现象,简要介绍了如何利用XML技术设计数据交换系统来打通数据通路,以充分利用和挖掘各个系统中的数据,使质监系统的信息化建设走向健康发展的道路。     

STEP标准实现方法的研究与应用

主要针对STEP标准的实现方法作了较为深入的分析，提出了利用数据库实现方法实现数据交换的较新的技术解决方案，重点介绍了建立产品信息模型、创建数据字典、创建实体基表进而建立产品信息数据库的方案，解决了数据库中产品信息存取操作这一关键问题。并给出了具体的应用程序实例。     

基于XML的YH30型液压机设计方法研究

以YH30型液压机为例,根据零件的特征参数利用DOM自动创建XML文档,并通过解析XML文档获取存储在文档节点中的零件尺寸,将它作为SolidWorks参数化建模中的关键尺寸.这种方法实现了SolidWorks参数化设计技术和XML数据库技术的结合,为异构CAD平台的数据交换和信息集成提供了一条有效途径.     

A STEP-compliant product data model for injection moulding products

In the current rapidly changing manufacturing environment, most manufacturing companies have realised that the ability to quickly develop a customised product at competitive prices is very crucial for them to survive in the keen competitive global market. Product modelling has been recognised as one of the key factors in determining the success of various product development strategies and for industrial competitiveness now and in the future. Standard for Exchange of Product model data (STEP) is an international standard designed to provide a complete, unambiguous, computer-readable definition of the physical and functional characteristic of a product through its lifecycle. This paper proposes a STEP-compliant product data model to fully support the complete product information representation and management for injection moulding product development. The data model is developed based on the structure of an injection moulding company. The entire data model consists of six data models which are defined to express information from various departments of the company. The data model is described in EXPRESS language, which can be integrated with other STEP-based product data models and databases. Consequently, the proposed system can be further extended for helping other injection moulding manufacturers to improve their product development process. An information sharing prototype system is implemented based on the proposed product data model to demonstrate the feasibility of the approach.     

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。     

基于PLIB-STEP标准的集成产品数据模型的研究

 STEP(ISO10303)标准对产品全生命周期信息进行规范化描述,是产品信息交换的基础,但缺乏高层次的语义描述. PLIB(零件库标准,ISO13584)通过总模型、功能模型和功能视图模型类及其结构来表示产品设计原理和多域多级别视图显示.结合PLIB/STEP的特点,提出了集成产品模型及信息共享的机制.     

STEP-based approach for direct slicing of CAD models for layered manufacturing

Direct slicing can generate precise slice contours from original CAD models and obviates the error-detection and repairing process of STL files. At present, most direct slicing approaches are restricted to some CSG solids or particular CAD packages. In this paper, an approach for direct slicing of CAD models based on STEP for layered manufacturing is presented. The original CAD model is first transferred from CAD systems to the slicing system by neutral STEP files. Using OpenGL graphics libraries, the solid model is then displayed, and the user is prompted to specify the layer thickness. Finally, the CAD model is sliced directly, and the sliced model is exported by SSL (Stratasys Layer interface files) file format which can be sent to many kinds of layered manufacturing systems for direct fabrication. The approach of STEP-based direct slicing is more flexible and does not rely on any specific CAD system; in addition, the STEP files are much smaller than the STL files. Implementation details and results are also presented.     

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.     

基于过程配置的MES制造数据管理方法与应用

通过研究制造执行系统中产品与工艺数据管理的应用需求,讨论了MES中的过程表达模型与过程配置方法在制造数据管理中的应用.参考XPDL等流程模型表达规范,构建了以过程为中心的制造数据信息模型.针对MES对制造过程不确定性表达的需求,给出了过程配置规则表达和配置结果求解的实现方法,设计开发了图形化的流程可视化软件模块,解决了...     

A model for co-evolution in manufacturing based on biological analogy

Manufacturing systems continue to adapt in order to survive the changing and challenging markets and global competition. Product and manufacturing design and capabilities are configured to allow the needed adaptation through innovative design, improved system paradigms, intelligent design and optimisation models, and product grouping to increase efficiency. In this research, it is hypothesised that the evolution and co-evolution of products and the machines used to manufacture them is akin to that observed in the adaptation of biological species. The symbiosis between products and manufacturing capabilities is studied using real examples, and a new model that establishes the symbiotic relationship between their evolution paths and observed co-evolution trends based on available historical information is proposed. Dual cladograms are used to track their evolution and detect useful potential development and plausible future evolution trends. When a state of co-evolution equilibrium is reached, a stimulus for more abrupt changes would be needed to cause further evolution on both sides. The co-evolution model has been applied to an example based on analysing the history of machine tools development and data from a major machine tools manufacturer. The evolution and co-evolution hypotheses of machined parts and machine tools were charted up to the currently observed state of equilibrium in this application field. This innovative model of co-evolution in manufacturing can help improve the utility of manufacturing resources and prolong the life of manufacturing systems beyond a single product generation and its variants.