The model of information exchange and sharing for CAD/CAPP using STEP and XML schema

To solve the problem of product data exchange and sharing among heterogeneous systems, the key technologies, including manufacturing information sharing, file conversion from STEP AP203/AP214 to AP224 with the conversion ware of STEP neutral files, are discussed.Using STEP standard as information output of CAD systems, the AP203/AP214 file output from CAD systems is transformed to AP224 file with STEP neutral file, while CAPP systems obtained geometry and manufacturing process information of the parts with AP224 neutral files.By translating the STEP files into corresponding XML neutral files according to the transformation criterions constituted by STEP AP28, XML schema library is setup.Upon this, product data exchange and sharing of manufacturing information can be achieved.     

Research on Step/Iges Conversion Tool of Surface Model AP203-Based

Most CAD systems conform to STEP standard and IGES specification as their input/output interfaces. In this paper,the STEP/IGES conversion tool of surface model based on AP203 is presented. The interface architecture of conversion tool and program language representation of STEP integrated resource construct are discussed in detail,and the mapping of surface structure and the conversion of entity data between STEP and IGES are established. Finally,an applied example is given.     

基于XML与Web服务的齿轮制造信息的共享与集成

为实现齿轮企业内各应用系统间的信息共享与集成,加快企业信息化进程,提出了基于可扩展标示语言（extensive makeup language,XML）与Web服务的齿轮制造信息共享与集成解决方案。研究了齿轮企业内EXPRESS数据模型与XML模型的映射机制,实现了产品模型数据交换标准（standard exchange of product data model,STEP）中性文件的XML转换和表达,并利用Web服务技术实现了齿轮信息共享服务平台的集成框架构建与软件开发。最后,通过圆柱斜齿轮的网络化磨削加工试验,来验证该信息共享与集成方案的可行性与实用性。试验结果表明,本文所提出的信息共享与集成方案,能有效实现齿轮企业各应用系统间的信息交流与共享,满足齿轮企业信息化建设的需求。     

Dynamic data exchange based on STEP-OODB for network-supported collaborative design

This paper analyzes the features of data for network-supported collaborative design, researches the data transformation, the data transmission and the data transaction of collaborative design. The system configuration and organization mode of dynamic data exchange for network-supported collaborative design are developed, in which, STEP serves as the product data exchange standard, what's more, Object-Oriented Database (OODB) is the kernel database of the system, so that each of the CAD systems can synchronously access the OODB, share and exchange the design information. The STEP-OODB serves as the organizing mode of dynamic data exchange for the network-supported collaborative design based on Internet, which realizes the real-time exchange and consistency of the dynamic data among the cross-platforms and CAD systems.     

基于STEP标准的CIM信息集成方法的研究

产品数据表达与交换标准STEP为CIM系统的信息集成提供了重要的技术支持。本文着重介绍了STEP标准的体系结构 ,并提出了基于STEP中性文件和基于共享数据库的信息集成方法     

多刚体动力学的STEP描述及其映射研究

基于STEP(产品数据表达和交换)国际标准，提出了一种具有构件、约束、力和运动激励等多个要素的多刚体动力学模型，以应用协议AP105为基础制定了关于多刚体中力和约束等方面的应用协议，并对EXPRESS向C 的映射规则进行了分析，从而为STEP模型的实现提供了一种有效的解决方法．     

基于STEP和CORBA的汽车产品协同设计体系结构

在深入分析STEP标准和CORBA技术的基础上，提出了基于二者的汽车产品协同设计体系结构．该结构可分为四个层次：数据层、通信层、协调管理层、应用层．数据层基于STEP标准，为应用程序提供统一的数据存取环境；通信层的目的是在分布式、异构环境下提供一种透明的数据操作机制；协调管理层主要用于协同设计的过程管理，由工作流管理、协同设计的冲突管理、工程数据事务管理三个模块组成；应用层包括CAX应用软件及其专用的数据读写器．