面向CAPP的制造资源预配置研究

以分布式、网络化制造资源库为基础,CAPP给出的工艺信息为条件,提出了一种面向CAPP的制造资源预配置方法及其实现技术。     

网络制造环境下CAPP系统关键技术研究

分析了网络制造环境中CAPP系统具有的新特点,提出了基于B/S结构的CAPP系统框架,并深入探讨了实现网络制造的CAPP系统的一些关键技术,如系统功能模块的实现方法、远程协同工艺设计技术、基于XML的信息集成技术、合作伙伴的评估与选择策略等。     

基于面向对象和概念树的CAPP工艺知识表达研究

工艺知识表达是CAPP系统的主要部分，本文介绍了CAPP技术和工艺知识表达的基本概念然后基于一种采用面向对象方法和概念树方法对工艺知识进行表示与组织，并应用在制造资源中。     

制造工艺资源的统一建模策略与实施技术

制造工艺资源的建模策略与应用接口方式的优劣是建立高效实用的CAPP开发工具的关键问题之一。通过对制造工艺资源描述形式的统计分析,提出集静态稳定、动态定制与增量进化为一体的工艺资源统一建模策略和应用机制。论述了工艺资源访问、系统实施等关键技术方法。抽象出来用于构建柔性软件系统的插件模式。实际应用表明该文的方法较好地解决了工艺资源系统的个性化与通用性之间的矛盾问题。     

计算机辅助工艺规划的适应性建模研究

本文提出一种数据集成模型,以供CAPP系统适应制造环境.工艺资源包括功能独立、数据关联的多个基本子类.通过引用、耦合、复合实现相关子类聚集,描述产品、设备和工艺方法本体.其间的映射驱动表达工艺资源的外延,成为CAPP的规划界面层.在适应期,系统吸收制造环境中的工艺数据,资源体及其界面共同演绎.在学习期,界面映射域及其权值累积消长,自我组织.工艺知识用层次化数据类库和抽象化规则表示.类库支持属性继承和模式演进,规则用于驱动和引导.模型改善工艺资源的动态组织性,提高了系统适应能力,在GS-CAPP中初步得到验证.     

面向快速重组制造系统的CAPP系统研究

文中首先分析了快速重组系统与面向快速重组制造系统CAPP系统的要求，结合组件技术特点，提出了面向快速重组制造系统的CAPP系统结构，并研究了系统组件的划分及系统组件的详细实现，最后给出了系统的形成过程。     

支持ASP服务的CAPP系统快速可重构技术

在ASP(ApplicationServiceProvider)服务模式下,制造企业对CAPP系统的需求呈现多样性和多变性等特点,因此该文提出支持ASP服务的CAPP系统快速可重构技术,以具有可扩展和开放性特点的系统结构为基础,采用面向对象的方法进行CAPP系统的构件化设计,基于EJB组件技术实现构件的组件化,并提出通过对系统构件编码的方法来提高重构速度。以一个实例验证了CAPP系统快速重构技术的有效性。     

哈锅CAPP应用实施

一、选型 哈尔滨锅炉厂有限责任公司是国内最大的电站锅炉制造企业之一,具有雄厚的技术实力和制造能力.在过去的几年里,为推进企业信息化建设步伐,技术人员尝试了CAPP软件的开发,也对国内CAPP软件技术的发展作了比较广泛深入的调研.此外,哈锅在生产工艺的标准化、系列化、规范化方面也做了大量工作,积累了大量的数据资源.     

基于ASP＋ACCESS的CAPP系统的研究

为了满足企业的发展需求,跟上网络化制造的发展趋势,提高企业市场竞争力和生产效率,提出基于ASP的零件加工CAPP系统,主要研究ASP＋ACCESS程序构建网络化CAPP系统的功能模块。     

基于B／S结构计算机辅助工艺的系统设计

计算机辅助工艺设计（CAPP）是产品设计与车间生产的桥梁,是利用计算机辅助技术辅助工艺人员完成从毛坯到成品的制造过程。本文介绍了基于B／S结构的一种实用CAPP系统设计方法,实现了在网络环境下的多用户并行设计,实现了工艺信息资源的远程共享和管理,提高了企业的经济效益和竞争力,保证了产品质量。     

基于资源约束的CAPP系统

在分析目前的专用型 ＣＡＰＰ和通用型 ＣＡＰＰ的优缺点的基础上，建立了基于资源约束的 ＣＡＰＰ模型，该模型可在用户所建的资源子系统约束下，进行工艺评价，同时在车间环境下动态生成工艺规划和加工参数，能适应目前制造业的柔性化趋势。     

基于Web服务的协同制造研究

产品的复杂性决定了产品制造过程的复杂性,需要设计、工艺,生产等部门在各个环节以及不同制造原料和生产人员协同完成,网络以及网络化制造的发展为分布式协同制造提供了实现环境,Web Services技术的成熟化为实现协同制造提供了技术支持,各个系统通过Web Services以及可扩展标记语言实现异构信息的共享及制造过程协同.研究了基于Web Ser-vices的协同制造,提出了面向服务的协同制造管理框架,并分析了框架的实现.最后将协同制造管理框架应用到车间管理信息系统,并使CAD,PDM、CAPP、设备、人事、生产信息等协同到制造过程,实现制造过程集成管理.     

Design of a STEP compliant system for turning operations

The changing economic climate has made global manufacturing a growing necessity over the last decade, forcing companies from East and West to collaborate beyond geographic boundaries in the design, manufacture and assembly of products. The ISO 10303 and ISO 14649 Standards (STEP and STEP-NC) have been developed to introduce interoperability into manufacturing enterprises so as to meet the challenges of responding to production on demand. This paper describes and illustrates a STEP compliant CAD/CAPP/CAM System for the manufacture of rotational parts on CNC turning centers. The information models to support the proposed system together with the data models defined in the ISO 14649 standard used to create the NC programs are also described. A structured view of a STEP compliant CAD/CAPP/CAM system framework supporting the next generation of intelligent CNC controllers for turn/mill component manufacture is provided. Finally a proposed computational environment for a STEP-NC compliant system for turning operations (SCSTO) is described. SCSTO is the experimental aspect of the research and is supported by information models that and have been constructed using a structured methodology and object-oriented methods. SCSTO was developed to generate a Part 21 file based on machining features to support the interactive generation of process plans utilizing feature extraction. A case study component has been developed to prove the concept of using the milling and turning parts of ISO 14649 to provide a turn-mill CAD/CAPP/CAM environment.     

Modeling integrated CAPP/PPS systems

In order to solve the isolation and the unilateral sequence integration between CAPP and PPS, this paper proposes the integrated system of CAPP and PPS based on distributed and dynamic process planning (ICAPPS), aiming for single-piece, small-lot and made-to-order production (SPSLMOP), and then systematically builds the integrated ICAPPS model. On the basis of the integrated model, this paper constructs the function model of ICAPPS, which includes the designing layer, the part planning layer, the shop planning layer and the scheduling layer in detail, according to the requirement for the rationalization of resource utilization, process design and plan scheduling in SPSLMOP.     

A PDES/STEP-based information model for computer-aided process planning

Computer Aided Process Planning (CAPP) constitutes one of the most essential elements in Computer Integrated Manufacturing (CIM). Although many CAPP systems have been reported in literature during the last two decades, few of them are compatible enough to integrate easily with other systems in the CIM environment. One major reason is the lack of an effective method to represent the information required by CAPP, and to unify such information with the information of other systems in the CIM environment. Indeed, this problem has received relatively inadequate attention in the recent research of CAPP systems. In this paper, an information model for CAPP is developed by using the object-oriented modeling and the Product Data Exchange Step/STandard of Exchange Product data (PDES/STEP) techniques. The model consists of the part information model, the process plan information model, and the production resource information model. The EXPRESS language or the EXPRESS-G diagram is used to represent these models. Indeed, the proposed information model will greatly improve the CAPP system's capability of effective integration with other systems in the CIM environment, and, ultimately, to facilitate the implementation of the whole CIM strategy in manufacturing enterprises.     

计算机工时定额支持系统的研究与开发

本文介绍了“计算机工时定额支持系统”的研究目的，研究原理，系统的基本结构和主要功能以及系统开发的主要方法。其中，重点介绍了模型库及其研究方法。“计算机工时定额支持系统”面向ＣＩＭＳ，可以与相关的ＣＡＰＰ系统集成使用。目前可用于离散型，中小批量生产的机械制造行业的工时定额管理，为工厂，企业编制好生产计划和人员调配计划，组织生产流程，搞好企业经济核算等提供了一套科学的工具。     

基于CAD／CAPP并行设计的特征描述与操作

本文介绍了在作者开发的基于特征的ＣＡＤ／ＣＡＰＰ并行系统ＦＯＰＳ中,针对ＣＡＤ／ＣＡＰＰ并行设计的要求,对形状特征的表示处理策略。提出了基于加工的形状特征分类及体描述思想,并从一个新的角度认识处理形状特征,建立了基于特征描述的实体几何模型,提出了广义“凹孔”的特征认识概念及相应的“内环”处理技术,为有效地在设计过程中同时为ＣＡＰＰ系统提供必要的信息,便于进行零件设计的结构工艺性分析、评价及工艺规程     

Automated feature ordering for generative process planning systems

Abstract: Generative computer aided process planning (CAPP) systems are typically split into two main modules. The first is concerned with the identification of component features and their parameters, while the second addresses the problem of automatically ordering the manufacture of the features into an efficient process plan. BEPPS is a CAPP system under preparation at the University of Bath. It has been designed with a modular structure that includes modules for conventional machines, NC machines, tooling and fixtures, cost estimating and links to both CAD and Production Management Systems. This paper concentrates on the BEPPS-ROT module for planning rotational components on conventional machine tools, and in particular on the methodology adopted for feature ordering. The novel feature ordering logic is based on rules gathered from industry and takes into account the constraints imposed by such features as the work holding arrangements and the need to rechuck the component during manufacture. After the feature identification stage has been completed the feature ordering logic enables machine tools and equipment to be selected and the process plan to be generated automatically.     

An integrated web-based CAD/CAPP/CAM system for the remote design and manufacture of feature-based cylindrical parts

This work describes the implementation of an integrated web-based CAD/CAPP/CAM system for the remote design and manufacture of feature-based cylindrical parts. This system, called WebMachining (), was developed in an e-manufacturing context, and the use of features allows the integration among the activities of collaborative design (WebCADbyFeatures), generative process planning (WebCAPP) and manufacturing (WebTurning). Through the WebCADby Features agent-based collaborative design module, cylindrical parts are modeled based on the synthesis of design features, in a Concurrent Engineering context. The WebCAPP generative CAPP module maps design features into machining features (including turning, milling, and drilling), and the mapping considers the setup, geometry, and operation. It uses a data structure similar to STEP-NC, and the generated process plans are nonlinear (i.e. they have alternatives). The WebTurning module performs the remote manufacture of the part, and it is based on a client–server architecture, where: (a) the servers are represented by the programs located at a workstation (Linux platform), which are connected to the machine tool through an Ethernet network interface; (b) the client is represented by a Java Applet. Some examples are provided in this paper, illustrating the remote design, process planning and manufacture of parts in a CNC turning center.