STEP信息集成软件工具的设计和实现

ＳＴＥＰ是国际标准化组织ＩＳＯ正在组织开发的应用于计算机集成制造系统（ＣＩＭＳ）信息集成的产品数据表达与交换标准，ＳＴＥＰ不仅是一种规范，更是一种信息集成技术，本文以ＣＡＤ／ＣＡＰＰ／ＣＡＭ系统集成为背景，提出了ＳＴＥＰ信息集成支持工具ＥｘＴｒａ的设计和实现技术，该软件工具已成功且有效地应用于ＣＡＤ／ＣＡＰＰ／ＣＡＭ系统集成中。     

CIM环境下的CAD／GAPP／GAM技术

ＣＡＤ／ＣＡＰＰ／ＧＡＭ是计算机集成制造系统中的关键环节，集中体现了物质流和信息流的集成。本文首先讨论ＣＡＤ／ＣＡＰＰ／ＣＡＭ系统开发的几种类型，然后对三个子系统进行功能分析，最后着重介绍了目前开发ＣＡＤ／ＣＡＰＰ／ＣＡＭ系统的重点技术，即并行工程哲理的运用和实现信息集成和共享的产品模型数据交换标准。     

CIM环境下的CAD／CAPP／CAM

ＣＡＤ／ＣＡＰＰ／ＣＡＭ是计算机集成制造系统中的关键环节，集中体现了物质流和信息流的集成。本文首先讨论了ＣＡＤ／ＣＡＰＰ／ＣＡＭ系统开发的几种类型然后对三个子系统进行功能分析，最后着重介绍了上前开发ＣＡＤ／ＣＡＰＰ／ＣＡＭ系统的重点技术，即并行工程哲理的运用和实现信息集成和共享的产品模型数据交换标准。     

知识获取系统NDKAS的研究与应用

知识获取系统ＮＤＫＡＳ的研究与应用潘金贵，陈彬，陈晶，陈世福（南京大学计算机科学系南京２１０００８）ＴＨＥＲＥＳＥＡＲＣＨＡＮＤＡＰＰＬＩＣＡＴＩＯＮＯＮＴＨＥＫＮＯＷＬＥＤＧＥＡＣＱＵＩＳＩＴＩＯＮＳＹＳＴＥＭ－ＮＤＫＡＳ￥ＰａｎＪｉｎｇｕｉ；Ｃｈ...     

集成化工程机械CAD／CAM系统研究与开发

集成化工程机械ＣＡＤ／ＣＡＭ系统研究与开发南京航空航天大学孙正兴，周良，丁秋林徐州工程机械研究所余晶，洪涛１．引言计算机集成制造系统ＣＩＭＳ作为新一代工厂自动化模式正在受到越来越广泛的重视，构成ＣＩＭＳ的各主要子系统，如ＣＡＤ、ＣＡＰＰ、ＣＡＥ、ＣＡ...     

CIMS环境下C/S与B/S混合模式CAPP系统的研究与开发

在基于ＣＩＭＳ环境下,ＣＡＰＰ不仅需要与ＣＡＤ／ＣＡＭ的集成,而且也必须与ＥＲＰ／ＭＨＰＩＩ／ＭＩＳ等分系统集成的思想,该文分析了ＣＡＰＰ与ＣＡＤ／ＣＡＭ、ＥＲＰ／ＭＲＰＩＩ／ＭＩ　、ＣＡＱ、ＦＭＳ／ＦＭＣ等分系统之间的关系和数据流,指出ＣＩＭＳ环境下不同用户对象对ＣＡＰＰ的要求及用户权限的差异。并据此提出基于Ｃ／Ｓ与Ｂ／Ｓ混合模式的ＣＡＰＰ系统设计方法。结合具体 ＣＩＭＳ环境,开发了以 Ｗｅｂ和数据库为支持环境的混合模式集成化 ＣＡＰＰ系统。     

CAD／CAPP／CAM系统中的产品数据管理开发策略

产品数据管理是集成化ＣＡＤ／ＣＡＰＰ／ＣＡＭ系统的关键，首先介绍一个基于ＳＴＥＰ标准的ＣＡＤ／ＣＡＰＰ／ＣＡＭ系统的开发情况，然后介绍其中数据管理软件的开发策略，系统结构与特点及在集成系统中应用的一些问题，最后给出一个应用实例。     

基于STEP的CAD/CAPP集成工具的研究

长期以来,ＣＡＤ／ＣＡＰＰ信息集成一直是ＣＩＭＳ系统的难点之一,且没有得到较好的解决。ＳＴＥＰ标准的发展和应用,使其成为ＣＡＤ／ＣＡＰＰ／ＣＡＭ系统信息集成的基础。随着越来越多的ＣＡＤ系统支持ＳＴＥＰ标准,开发基于ＳＴＥＰ的ＣＡＤ／ＣＡＰＰ集成工具成为当务之急。     

CIMS环境下C/S与B/S混合模式系统的研究与开发

以ＣＩＭＳ环境下ＣＡＰＰ子系统为实例,基于ＣＩＭＳ环境下ＣＡＰＰ不仅需要与ＣＡＤ／ＣＡＭ的集成,而且也必须与ＥＲＰ／ＭＲＰⅡ／ＭＩＳ等分子系统集成的思想,分析了ＣＡＰＰ与ＣＡＤ／ＣＡＭ、ＥＲＰ／ＭＲＰⅡ／ＭＩＳ,ＣＡＱ、ＦＭＳ／ＦＭＣ等分了系统之间的关系和数据流,指出ＣＩＭＳ环境下不同用户对象对ＣＡＰＰ的要求及其用户权限各不相同。并据此提出基于Ｃ／Ｓ与Ｂ／Ｓ混合模式的ＣＡＰＰ系统设计方法。结合具体     

CIMS中MRPI与CAD/CAPP/CAM的信息集成方法

基于微机环境下的计算机集成制造系统以其投资省、见效快而逐渐在我国制造业特别是中小型企业实施，信息集成是ＣＩＭＳ的关键技术之一。本文提出了在微机环境下，用Ｆｏｘｐｒｏ开发ＭＲＰＩＩ，实现ＣＡＤ／ＣＡＰＰ／ＣＡＭ信息集成的方法。     

以OOEDB为核心的集成化CAD/CAPP/CAM 系统GS-ICCC的设计与实现

ＧＳ－ＩＣＣＣ是一个以自行研制开发的面向对象工程数据库管理系统ＯＳＣＡＲ为核心的集成化ＣＡＤ／ＣＡＰＰ／ＣＡＭ系统，它的主要特点是按照ＳＴＥＰ标准在全局产品数据模型基础上实现ＣＡＤ，ＣＡＰＰ，ＣＡＭ的信息集成，本文围绕着这一原则介绍了ＧＳ－ＩＣＣＣ的系统总体结构，ＯＳＣＡＲ功能组织，全局产品数据建模框架以系统集成的设计与实现。     

面向集成的CAD系统

在ＣＩＭＳ中，集成是关键技术。设计者在不同环境中产生的数据需要相互交换和共享。该文主要介绍设计阶段产生的数据如何与ＣＡＰＰ／ＣＡＭ集成。开发特征造型系统，建立包含零件的几何信息和加工信息的信息模型，最后输出ＳＴＥＰ中性文件，达到ＣＡＤ／ＣＡＰＰ／ＣＡＭ集成。     

CATC — A Computer Aided Tolerance Control system

Computer utilization in manufacturing systems is increasing at a rapid rate. Developments thus far have been disjointed. Much work needs to be done in the area of integrating computer aided design and computer aided manufacturing (CAD/CAM). Tolerance control is an important component in the integration of CAD and CAM. Selection of design tolerances affects the build-ability of a product. The selection of manufacturing processes and sequence of processes affects process tolerance stacking. Unexamined process tolerance stacking leads to scrap and rework. A computer aided tolerance control (CATC) system is presented in this paper. This system is based on the tolerance chart technique. The CATC system is interactive and uses computer graphics for information display. The system can be used for computer aided process planning (CAPP) and for CAD/CAM integration.     

An integrated intelligent machining system for axisymmetric parts using PC-based CAD and CAM software packages

Machining process planning involves the formation of a set of directions describing the machining operations required to transform raw stock into a finished part. Conventional process planning, performed manually, relies on the knowledge and competence of an experienced process planner and tends to be time consuming and error prone. In the past two decades, much effort has been spent on improving process planning by utilizing the power of a computer to emulate the capabilities of an experienced planner. During the same period, computer-aided design (CAD) and computer-aided manufacturing (CAM) software has been developed to enhance design productivity and to assist the NC code generation facets of the machining process. The entire planning process may be automated be integrating CAD and CAM using computer-aided process planing (CAPP). The research described in this paper outlines the design and development of an intelligent CAPP system integrating two commercial CAD and CAM software packages, Autocad and Mastercam.     

Design of object-oriented database for the definition of machining operation sequences of 3D workpieces

This paper describes the activities of Object-Oriented (OO) analysis that were implemented in order to obtain a high part representation level and to give sets of structured and hierarchical data to the Computer Aided Process Planning (CAPP) system. The OO modeling activities were carried out by using the Object-Oriented System Analysis (OOSA) method which allows careful specification of all the information contained inside the system. All the models used by this method have been described in detail to show how the OO database is defined and how it can be used by a generative CAPP system. The feature model proposed is defined by taking all the part information that can be recognized and extracted from the Computer Aided Design (CAD) model into account. The result is the design of an OO database which allows the CAPP system to use manufacturing features to define machining operation sequences of 3D workpieces. The approach proposed is generic enough to integrate any geometrical forms which can be recognized and identified from the CAD system. Hole geometry is taken as an example to show the link between the step of OO analysis and the step of knowledge representation in the Expert System which has been used to generate machining cycles. The OO database presented makes up a real solution of CAD/CAPP/CAM integration by using feature modeling.     

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.     

参数化CAD-CAPP系统技术的研究与应用

针对现代制造企业对信息集成的需求,研究了参数化CAD/CAPP系统的原理及相关技术.利用相似性原理、可重用性原理、实例推理技术、设计知识库技术、参数化技术开发了参数化CAD模块.开发了基于设计知识数据驱动、工艺知识约束修改典型工艺模板的派生式参数化CAPP模块.并建立了巷道式双立柱堆垛机参数化CAD/CAPP系统,实现...     

基于制造业CAX/PDM/ERP集成研究

分析了制造业内部CAD／CAM／CAPP与企业ERP的关联、因特网与企业内部网之间的关系,对如何利用PDM作为中间桥梁,将企业CAX系统与企业ERP集成的方法进行了论述与研究,构筑了一种基于制造业信息集成系统的模型。基于CAX／PDM／ERP集成模型的应用研究,目的在于提高制造业信息系统的集成深度与广度,为企业的发展与竞争提供充实的信息化基础保证。     

MCSDM：一个面向敏捷制造的CSCW系统

敏捷制造是下一世纪全新生产模式，本文对敏捷制造的关键技术ＣＳＣＷ及其在先进制造技术中的应用进行了讨论，介绍了本单位 ＭＣＳＤＭ系统的体系结构和功能模型，ＭＣＳＤ央异地的ＣＡＤ、ＣＡＭ项目组成员在一个虚拟的协作环境内协同荛。