Feature Setup Determination in Integrated CAD/CAM System For Concurrent Engineering

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一个CAD/CAPP/CAM集成系统

CAD／CAPP／CAM集成系统是整个CIMS系统的重要信息来源，影响整个CIMS的水平。作者结合在钻井用牙轮钻头制造厂建立CIMS工程的实际，研究了CAD／CAPP／CAM系统的集成问题，本文介绍其主要功能和结构。     

STEP-NC based high-level machining simulations integrated with CAD/CAPP/CAM

With the development of manufacturing,numerical control(NC) machining simulation has become a modern tool to obtain safe and reliable machining operations.Although some research and commercial software about NC machining simulations is available,most of them is oriented for G&M code.It is a low-level data model for computer numerical control(CNC),which has inherent drawbacks such as incomplete data and lack of accuracy.These limitations hinder the development of a real simulation system.Whereas,standard for the exchange of product data-compliant numerical control(STEP-NC) is a new and high-level data model for CNC.It provides rich information for CNC machine tools,which creates the condition for an informative and real simulation.Therefore,this paper proposes STEP-NC based high-level NC machining simulations solution integrated with computer-aided design/computeraided process planning/computer-aided manufacturing(CAD/CAPP/CAM).It turned out that the research provides a better informed simulation environment and promotes the development of modern manufacturing.     

基于XML的CAD/CAPP/CAM信息集成技术

在比较目前几种流行的系统集成技术的基础上 ,通过采用基于特征、面向对象的方法为产品几何数据和非几何数据建立信息模型 ,结合以计算机内部模型表达的产品定义数据 ,提出了一种基于 XML 标准的信息集成解决方案 ,并首次将 JDOM技术和 XQL查询技术珠联璧合地结合在一起实现对 XML文档高效地访问、操作 .该方案以灵活的数据模式、可重用的信息模块、易扩展的数据接口有效地、可靠地解决产品在设计和制造过程中信息的交换和共享 .     

CAX-A Domestically Developed CAD/CAM System

This paper introduces a domestically developed CAD/CAM system,CAX,which is ableto meet the needs of small and medium sized enterprises.Firstly,the motivations and principles for thedeveloping of the system are presented.Then,the functions and features of CAX are described.In the3rd section,the algorithms for generating blending surfaces with both constant radius and variant radiiare detailed.Six color plates showing the applications of CAX are included in section 4.Finally,dis-cussed are some enhancements being added to CAX in th future.     

基于PDM的CAD/CAPP、CAM集成

该文以８６３／ＣＩＭＳ示范工程的实践和开发为依据,对基于产品数据管理（ＰＯＭ）的ＣＡＤ／ＣＡＰＰ、ＣＡＭ集成进行了深入研究。文章首先给出了系统集成的原则,随后提出了ＰＤＭ的框架体系结构和基于ＰＤＭ的集成技术,最后讨论了基于ＳＴＥＰ的产品数据交换和基于ＳＤＡＩ标准数据接口技术。     

基于特征的CAD知识集成技术研究

目前,许多CAD系统是基于特征造型的系统,但这些特征系统普遍存在产品信息不全、产品数据中缺乏制造、装配和评价后续过程的相关信息以及特征定义的一致性差,导致特征识别的难度大等问题;针对上述问题,提出了基于特征的零件信息建模方法,实现了基于STEP标准的、可实现自动特征识别的零件信息集成系统,并且给出了具体的基于特征设计的CAX系统。     

基于VC++类库的CAD/CAPP集成系统的研究与实践

文章采用特征拼装及特征单元的参数化设计方法，在以VisualC++类库（MicrosoftFoundationClassMFC类）为数据存储、交换与管理的基础上，成功地实现了CAD／CAPP集成数据的传递与共享。通过DXF接。方式与VisualC++的连接，可在AutoCAD14下自动生成零件图，在集成环境下自动生成工艺文件。     

激光打标设备的CAD/CAM系统开发

本文介绍了以TIF象素文件数据格式作为中间介质，实现激光打标设备的计算机辅助图形设计以及控制指令生成的CAD／CAM一体化系统开发的方法。     

CAD/CAM集成系统中CAD模型信息的检取

文中讨论了目前的CAD／CAM集成系统中信息的传递和交换，介绍了三维CAD软件Solid Edge的开放应用程序接口的体系结构，并给出了基于Solid Edge平台的CAM系统开发中检取CAD模型信息的方案。     

一个基于NOVELL网的实时监控平台的设计与实现

通过对ＤＯＳ的多任务环境和网络实时点一点通讯的研究，作者提出并实现了基于ＮＯＶＥＬＬ网的网络实时监控平台，该平台可以方便地由一台工作站实时监控其它工作站，与其它此类系统相比，该系统具有速度快，功能强，使用方便，功能便于扩充等优点，本文就共实现技术作了详细介绍。     

复杂曲面CAD/CAM/CNC集成系统研究

提出了如何在PC平台下开发多坐标联动数控编程及加工软件。根据系统要实现的目标合理划分了各个功能模块并提出了相应的技术实现。     

CM,RE和CAD/CAM系统集成环境的研究

对三坐标测量系统、联系实际向工程、CAD/CAM系统信息集成中存在的问题进行分析，提出了面向快速逆向设计和制造集成环境的功能模型、关键技术和处理方法。通过建立CM，RE，CAD/CAM系统的集成平台，对样件、模型进行快速测量，并对测量数据进行数据处理、特征重建、几何造型和数控加工处理，以实现对产品样件或模型的快速逆向设计与制造。     

面向CAD/CAPP集成的零件特征组合描述及其应用

在分析目前依靠单特征进行工艺推理不足的基础上 ,从工艺推理角度把组成零件的一些单特征按照加工要求重构 ,由此引出特征组合的概念 ;分析零件中可能出现的特征组合的类型并对其进行描述 ,指出从 CAD模型中提取和识别这些描述的可行方法 ,由此实现 CAD与 CAPP的集成 ;讨论特征组合对工艺推理的影响 ,这种从工艺角度描述特征的方法有利于提高工艺推理的精度 .最后以实例说明特征组合描述在 CAD/CAPP集成系统提高工艺推理准确性的应用     

A STEP-BASED CAD/CAPP INTEGRATION

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Integrated manufacturing features and Design-for-manufacture guidelines for reducing product cost under CAD/CAM environment

The main contribution of the work is to develop an intelligent system for manufacturing features in the area of CAD/CAM. It brings the design and manufacturing phase together in design stage and provides an intelligent interface between design and manufacturing data by developing a library of features. The library is called manufacturing feature library which is linked with commercial CAD/CAM software package named Creo Elements/Pro by toolkit. Inside the library, manufacturing features are organised hierarchically. A systematic database system also have been developed and analysed for each feature consists of parameterised geometry, manufacturing information (including machine tool, cutting tools, cutting conditions, cutting fluids and recommended tolerances and surface finishing values, etc.), design limitations, functionality guidelines, and Design-for-manufacture guidelines. The approach has been applied in two case studies in which a rotational part (shaft) and a non-rotational part are designed through manufacturing features. Therefore, from manufacturing feature library a design can compose entirely in a bottom-up manner using manufacturable entities in the same way as they would be produced during the manufacturing phase. Upon insertion of a feature, the system ensures that no functionality or manufacturing guidelines are violated. The designers are warned if they attempt to include features that violate Design-for-manufacture and Design functionality guidelines. If a feature is modified, the system validates the feature by making sure that it remains consistent with its original functionality and Design-for-manufacture guidelines are re-applied. The system will be helped the process planner/manufacturing engineer by automatically creating work-piece data structure.     

柔性级进模CAD／CAM系统FPDDS

阐述了建立一个柔性级进模ＣＡＤ／ＣＡＭ系统（ＦＰＤＤＳ系统）的重要性以及该系统的组成结构和功能。介绍了基于特征设计技术的板金件构型方法和交互式条料排样的原理。阐述了提高级进模ＣＡＤ／ＣＡＭ系统及效率的有效途径是选择一个合理的装配模型及基于该模型的一个模具标准结构定义工具，并且建立一个与主系统独立的开放式模具标准件建库系统。     

协同开发环境中的CAD/CAM集成系统研究

本文探讨了计算机网络技术下的CAD／CAM集成系统．提出了一种协同环境下的CAD／CAM集成系统，并构造了其网络体系结构和其系统的框架结构。     

C-space based CAPP algorithm for freeform die-cavity machining

Presented in the paper is a C-space based computer automated process planning (CAPP) algorithm for freeform die-cavity machining, which is an extension of the hierarchical CAPP model proposed earlier by the authors. In order to demonstrate its validity, the proposed CAPP algorithm has been implemented and applied to actual die-cavity machining examples.     

Research on Concurrent Engineering Oriented Integrated Product Development Process Management System

In concurrent engineering, effective process management is the key to improve the efficiency and quality of product development. Although in project management system, workflow management system and PDM system, process management functions are provided, they can not meet the needs of product development. In this paper, we integrate the project management, workflow management and product management technique together and a concurrent engineering oriented integrated product development process management system is proposed. The system structure, integrated product development model and running method are introduced. The practice proves this system is powerful in supporting product development process.