Rapid one-of-a-kind production

To shorten the product development cycle time and reduce the cost at the same time, which is very critical for the survival of those small and mid-sized one-of-a-kind production (SMOKP) companies, various computer communication, simulation and computer aided engineering and management techniques have been widely used in these SMOKP companies. However, according to our study, the applications of these advanced computer technologies in these SMOKP companies are lack of system integration and synergy, which result in communication errors, reworks, duplications and hence a longer product development lead time and a higher cost. To solve this problem, an inter/intranet based computer aided rapid product development system is presented in this paper. This system consists of a number of inter/intranet based computer models or subsystems for supporting rapid development of a one-of-a-kind product. It also employs a novel concurrent product development strategy called “prototype based incremental product development strategy” and an integrated product data structure called “product production structure”. Some industrial implementations of the proposed system, product development strategy and product data structure are also reported in the paper.     

Rapid one-of-a-kind product development

In today’s global market, more and more manufacturing companies have realised that the ability to quickly develop a customised product in an economic and efficient way is critical for them to survive in the keen competitive international market, particularly for one-of-a-kind production (OKP) companies. A new generation of OKP systems needs to be developed to maintain competitiveness in the global marketplace and to improve the ability to rapidly combine the strengths of manufacturing partners to meet market needs. In this paper, the main objectives of rapid OKP development in the global manufacturing environment are discussed. The background of recent approaches for rapid development of OKP products is reviewed. After systematically reviewing the existing OKP systems and recent developments of new technology and systems, the authors discuss current issues and requirements for developing a new generation of OKP systems for rapidly producing OKP products. At the end of this paper, a reference system structure is proposed for rapid development of OKP products in the global manufacturing environment .     

基于RPM/PDM技术的集成快速设计与制造系统的研究

简述了现代工程设计与制造的发展趋势 ,提出了基于 RPM/ PDM技术的集成快速设计与制造系统的体系结构 ,并分析了系统的工作流程 ,最后分析了基于 RPM/PDM技术的集成快速设计与制造系统的特点     

基于多色图理论的产品结构配置模型

介绍了多色集合和多色图理论的概念和方法 ,并应用多色图理论对产品数据管理中的产品结构和配置管理进行了研究。利用多色图的着色原理表示产品树型结构的节点属性 ,标识出配置项 ,建立了基于多色图理论的产品结构及配置模型。按照图论中树图遍历原理提出了基于该模型的产品配置算法 ,并结合实例进行了配置实现过程分析。采用多色图理论的产品配置模型可以全面地表述配置过程 ,使复杂产品的配置管理简单化。     

RESEARCH ON PRODUCT INNOVATION DESIGN IN VIRTUAL PRODUCT DEVELOPMENT

An integrated template of virtual product development alters primarily sequential tradition mode of product lifecycle. The template integrates all processes of product development using digital modern. An environment of virtual product development provides product development environment of integration, communion, network, concurrent and collaboration. Combining development of new rapier loom, an innovated design process is researched in virtual product development, which consists three portions: constructing an integration development environment, innovation design andmanufacturing simulation. The innovated design process realizes reverse design, mechanism concept design, structuraldesign and analysis, performance analysis and manufacturing process simulation of virtual product, which can enhancegreatly product performance and reduce cost and development cycle of new product.     

并行设计环境的 PDM 集成框架研究

从并行设计的特点引出对并行设计环境的要求,以及ＰＤＭ软件作为设计过程的支持工具从而引伸出ＰＤＭ集成框架的概念;通过分析当前ＰＤＭ软件的现状,提出结合最新计算机技术和相关领域技术的ＰＤＭ集成框架体系结构及构建并行设计环境的过程。     

产品数据管理技术的最新进展综述

针对产品数据管理（PDM）系统的最新发展技术,基于PDM系统软件功能分析,研究了分布式多层体系结构、虚拟产品开发管理（VPDM）和新一代的产品开发管理系统（PDMII）技术、CORBA和Web技术、企业级PDM系统技术及Internet／Intranet技术,建立了Internet／Intranet／Extranet之上的统一的产品数据模型,提供了企业产品开发电子商务解决方案,实现了应用工具与底层数据环境的系统集成和系统的无缝连接。研究结果表明,PDM技术增强了企业对象的安全性、高效性和重复使用性,降低了企业成本且缩短了产品开发周期,企业级PDM系统技术具有更高级的过程管理、更大范围的数据共享和更复杂的产品配置管理功能,采用CORBA和web技术有利于PDM系统的集成和扩展。     

并行工程中产品、活动和组织的集成建模

新产品开发系统建模是应用并行工程的基础 ,模型的目的是建立一个环境 ,从而有利于产品开发信息在企业不同部门之间的流动和共享。然而 ,除了信息共享的障碍以外 ,系统如何适应活动和组织的变化 ,也是成功实现开发系统集成和应用并行工程的重要问题。文中将新产品开发系统分为产品层、活动层和组织层 3个层次。通过对各层建模方法及它们之间相互关系的分析 ,提出活动模型、产品模型与产品开发组织模型的集成 ,是并行工程应用模型的关键。并且在活动模型的基础上 ,对活动模型、产品模型和组织模型集成的方法进行了研究。     

快速成形转向快速生产的主要障碍

快速成形制造 (RPM)技术是国外 80年代后期发展起来的一门新兴综合技术。它使直接从概念设计迅速转为产品设计的生产模式成为可能 ,工业界正在探索使用快速成形机器生产最终要制造的零件的问题。但是 ,它面临诸如材料性能、表面质量、零件的尺寸规格和成形速度等许多挑战。一旦克服了这些障碍 ,快速成形就将转向快速生产 ,并将促进大量定制生产模式的加快实现     

基于PDM的电子电路设计制造一体化

分析企业电子电路设计制造系统的现状及问题,提出基于PDM(产品数据管理)的设计制造一体化系统的方法和该系统实施过程中的一些关键技术。     

Object-Oriented Petri Nets with Changeable Structure (OPNs-CS) for Production System Modelling

We propose object-oriented Petri nets with changeable structure (OPNs-CS) in this paper for effective modelling of production systems with changing structures. Two mechanisms for carrying out the structural changes in OPNs-CS are defined. One is for the modification of message passing relationships between distinct OPNs and the other is for adding of OPNs to, and the removing of OPNs from, a model. A case study is provided to show that OPNs-CS can cope with both the uncertainties which may exist during the model-building phase of a one-of-a-kind production (OKP) system and the structural changes of the system which often occur while the production system is in operation.     

A WWW-Based Information Management System for Rapid and Integrated Mould Product Development

As efficient management of product information that covers the whole life cycle is critical to the enhancement of corporate competitiveness. This paper explores the design and development of a World Wide Web (WWW) based product development information management system for a cross-nation manufacturing corporation that is headed by a holding company in Christchurch, New Zealand. Since product data are often managed in a distributed computing environment, common object request broker architecture (CORBA) is employed to ensure the interoperability among distributed information objects. A STEP-based information framework is proposed to preserve the openness of the system. This WWW-based information management system is discussed in this paper, which includes two major components: 1. WWW-based product design and development distributed object-oriented databases and knowledge bases. 2. A WWW-based integrated system platform. Several sub-models are introduced, which include an object-oriented database structure, a WWW-based information management system, a WWW database tool, an information access tool, the incremental process-planning method, a cost-optimisation model and an integrated software platform for the integration of CAD, CAPP, CAM, and a WWW-based information management system.     

PDM系统中产品结构模型的研究

分析了产品与零部件之间的结构关系及相关数据,采用面向对象的方法建立了产品结构模型,以此来描述产品结构树;结合关系型数据库的特点,给出了产品结构树的遍历算法,从而为PDM系统的实现提供了基础。     

快速成形技术及其工艺分析

快速成形技术是一种全新的制造技术。本文介绍了快速成形技术的基本原理 ,提出了基于快速成形技术的产品开发模式以及快速成形技术的特点。在此基础上 ,从输入模型、成形方法、成形材料和应用领域四个方面对快速成形工艺进行分析 ,最后进一步讨论了几种典型的快速成形工艺。     

并行工程环境下的飞机工装设计数据管理

论述了飞机工装设计数据管理与产品设计的关系 ,介绍了并行工程环境下的飞机工装设计数据管理系统的体系结构 ,运用 IDEF3建立了过程模型 ,运用 IDEF1X建立了信息模型 ,定义了工装产品数据对象的层次结构 ,介绍了与传统数据管理模式的转换接口设计     

基于PDM的维修性全息模型研究

为了满足各个应用领域维修建模的需要,提出了维修性全息模型的概念,阐述了建立维修性全息模型的重要性,并对其框架体系结构进行了分析。     

PDM/ERP集成技术研究

主要论述了企业PDM和ERP的信息集成的必要性和集成框架 ,详细论述PDM/ERP集成的模式和实现方法。为企业的PDM和ERP集成提供了可借鉴的模式和方法     

PDM和ERP的集成

介绍PDM系统和ERP系统功能,分析了两个系统集成的必要性和存在的困难,概括实现两个系统集成的三种技术方案,指出实现系统集成的两个关键技术。     

PDM系统中电子图纸自动入库技术研究

在开发工程图管理系统及实施 PDM过程中 ,高效、准确地自动提取图纸标题栏信息 ,实现大量现存电子工程图档的自动入库是一个关键技术。本文利用 Active XAutomation技术实现了对 DWG、DXF格式电子图档的标题栏、明细表等信息的无损失提取和自动入库 ,并对于提取过程中的标题栏模板定义和提取算法进行了分析说明。