基于功能模块设计的CAD系统

提出了功能模块设计的概念,并把功能模块设计技术思想引入到ＣＡＤ系统,对建立基于功能模块设计的ＣＡＤ系统作了一定探索。     

利用参数化技术建立机械产品CAD系统

在分析机械产品ＣＡＤ系统特点的基础上，提出产品ＣＡＤ系统应该是程式化设计和交互式设计相结合的观点，并建立了一种基于参数化技术的产品ＣＡＤ系统的体系结构。     

基于零件特征的生产工艺系统的研究

结合一个ＣＡＤ／ＣＡＭ一体化工程的实例,分析基于产品零件特征的生产工艺系统的总体结构,讨论其中３个子系统的关键技术,介绍了一种基于产品零件特征的集成模式,并开发基于产品零件特征的ＣＡＰＰ系统和ＣＡＦＤ系统,该系统提出了工艺过程和夹具的半智能化设计的模式,利用特征技术将ＣＡＰＰ的设计过程前镶后嵌于ＣＡＤ与ＣＡＭ中,实现产品设计与工艺设计过程的并行和夹具设计的半自动化。     

基于特征造型的回转体零件CAD系统

基于特征造型的回转体零件ＣＡＤ系统扬州工学院王隆太，王晓鸿，周永胜随着ＣＡＤ技术的发展，目前回转体零件ＣＡＤ的研究和应用已趋成熟，已有不少这类系统在投人使用。但就笔者所见，传统的ＣＡＤ系统存在着以下几方面的不足：（１）系统的造型侧重于设计对象几何结构...     

CAD/CAM最新技术浅析

叙述了ＣＡＤ／ＣＡＭ技术最新发展,着重就当今ＣＡＤ／ＣＡＭ最前沿技术－－人工智能、虚拟现实、快速成型的基本涵义、原理或方法及应用前景作了浅析,同时提出了ＣＡＤ／ＣＡＭ技术发展带给我们的思考。     

基于变型设计和成组技术的零件建模方法

讨论了在ＣＡＤ技术中基于变型设计和成组技术的零件建模方法，并将这种方法应用于一个实际的零件ＣＡＤ系统的设计中，取得了满意的效果。     

冲裁模具CAD／CAM系统集成开发平台的研究

基于ＣＡＳＥ（ＣｏｍｐｕｔｅｒＡｉｄｅｄＳｏｆｔｗａｒｅＥｎｇｉｎｅｅｒｉｎｇ）技术原理和冲裁模设计与制造过程的特点以及ＣＡＤ技术原理，提出一种面向中小型模具企业和科研单位的冲裁模ＣＡＤ／ＣＡＭ系统集成开发平台。论述了平台的设计要求、体系结构和工作流程。并指出实现平台的关键技术问题。     

基于Delphi和AutoCAD的CAD/CAPP集成的软件接口

介绍了基于Ｄｅｌｐｈｉ平台的ＣＡＰＰ系统通过ＤＸＦ文件与ＡｕｔｏＣＡＤ的软件接口,利用ＯＬＥ技术,将工艺设计过程中的文字信息生成环境与工艺的绘图环境相结合,在 ＡｕｔｏＣＡＤ环境下输出工艺卡,较好地解决了现有的许多ＣＡＰＰ系统存在的工序图与工序内容分开编制的问题。     

一种具有工艺分析功能的CAD系统的集成策略

ＣＡＤ／ＣＡＭ集成系统的开发是当今计算机应用发展的潮流所向。基于制造的ＣＡＤ集成系统设计，随着特征技术的发展与应用，为我们进行有效的ＣＡＤ／ＣＡＭ集成提供了新的途径。本文介绍了面向特征的ＣＡＤ集成系统的设计思想，提出了一种ＣＡＰＰ系统中工艺分析模块超前运行的有效的集成方法。     

基于特征的三维参数化液压集成块产品建模

本文研究的是基于ＡｕｔｏＣＡＤ平台利用设计特征技术进行机械产品建模技术,并在宁波市九五科技攻关项目－－液压集成块ＣＡＤ系统中得以应用,取得良好效果。     

Live parametric design modifications in CAD-linked virtual environment

This paper presents a solution to support parametric design modification in a virtual reality (VR) environment. It builds upon a novel computer-aided design (CAD) and VR integration framework, namely, CAD-linked virtual reality environment. With this framework, semantic information in CAD models, such as constraints, design features, and parametric settings can be automatically extracted during the creation of VR environment and be integrated into the virtual assembly (VA) models. Moreover, the persistent naming mechanism originating from feature-based modeling technology is introduced into the CAD–VR integration, based on which a persistent linkage between VA models and their CAD counterparts can be established. Users are able to visualize design features and to access the associated parametric info in VR environment and also to change the parametric settings online whenever necessary. The modified parametric settings are then sent back to the linked CAD models so that parts can be re-evaluated. The modified CAD part can then be reloaded into the VA model under an automated mechanism. Such communications between CAD and VR applications are supported in a live mode utilizing the COM interfaces provided by CAD server. With this solution, a quick return loop from VR to CAD is achieved. Therefore, it provides the possibility to support quick design change review and “what-if” evaluations for applications such as collaborative system design and immersive project review in VR. This constitutes the major contribution of the work to product development process.     

基于虚拟现实技术CAD系统的研究

在CAD系统中引入虚拟现实技术进行设计是当前CAD系统的发展趋势之一，可以为设计人员提供自然、逼真、多感知的设计环境，从而大大提高设计的效率和质量。在介绍传统CAD系统的基础上，分析了其存在的局限，重点介绍了虚拟现实技术的有关概念，基于虚拟现实技术CAD系统的提出、特点以及目前的研究应用现状。     

基于并行工程的汽车部件CAD系统

主要研究了并行设计在汽车部件ＣＡＤ系统开发方面的应用。将所要设计的汽车部件在计算机上模拟为一个三维的完全数字化的实体模型,使设计、分析计算、装车检验、工业造型作为一个并行的工程来研究;利用人机工程、动态仿真、虚拟装配等关键技术,克服了传统的设计方法设计周期长、成本高、产品质量低等方面的弊端,使汽车部件的设计符合现代化设计的潮流。     

面向大型复杂产品的虚拟装配技术研究

针对大型复杂产品在装配生产组织形式、人的参与程度、装配工艺流程的优化、装配人员培训和示教等方面的特点,分别进行了虚拟装配关键技术的研究。重点探讨了考虑人体活动的新型虚拟环境技术、CAD系统和虚拟装配系统的数据集成技术、装配工艺的生成及其优化技术、工艺文件生成和现场示教技术等4个方面。最后给出了开发的虚拟装配原型系统在某型号复杂产品中的应用实例。     

A solution to integrate computer-aided design (CAD) and virtual reality (VR) databases in design and manufacturing processes

The use of virtual reality (VR) techniques in industry is subject to very high expectations, as VR has emerged as a popular technology for computer-human interfaces in order to master the shortcomings of CAD systems. 3D CAD models provide a natural way of sharing design information among participants in the production process. VRML is a tool specifically designed for creating 3D virtual worlds on the Web, where these synthetic worlds can give us the ability to visualise objects and navigate the virtual world. This paper describes a system for VRML model visualisation that enables changes in the configuration file, which is written in XML, and that automatically reviews the model including the functional behaviour. From the evaluated VRML model, the connection to a PDM system is provided with a list of elements and their material properties.     

机械产品三维参数化变型设计研究与应用

分析了目前机械产品三维参数化变型设计的现状,指出了其存在的不足。提出了模块划分、设计计算、参数化变型设计、有限元分析、工程图自动调整的机械产品闭环设计步骤。论述了机械产品三维参数化变型设计的内涵和关键技术。基于主流三维CAD软件平台,开发企业级基础组件,提供专用产品及零部件模块的三维参数化变型设计软件。     

VIRTUAL DESIGN OF A NEW TYPE OF HYDRAULIC SUPPORT

Using virtual reality to design a new type of hydraulic support is discussed. That is how to make use of the virtual design to develop coal mining machine in practice. The advantages of virtual design are studied and the simple virtual reality system is built. The 3D parts and elements of hydraulic support are modeled with parametric design in CAD software, then exported to VR environment, in which the virtual hydraulic support is assembled, operated and tested. With the method, the errors and faults of design can be fined easily, many improvements are made and the new hydraulic support is developed successfully.     

Innovative integration techniques between Virtual Reality systems and CAx tools

The efficacy of virtual reality (VR) as a design support technique is widely recognised by industries. However, the efficiency of the routine employment of VR into the product development process (PDP) still finds an obstacle in the poor integration of the tools employed. The use of VR still needs long and quite hard procedures to work effectively; the models have to be converted into a format that is compatible with VR systems and each task requires an effort to prepare the virtual environment or to post-process the results that depend on the complexity of the task. This work analyses some VR applications into the PDP and describes some ideas to effectively support the operator that prepares the virtual environment. These ideas have been tested by developing four software interfaces, able to create an easy data exchange link between VR and other design tools like CAD, CAE and computer aided control engineering (CACE).     

基于CBR和RST的智能冲模CAD系统研究

冲模设计是一个复杂的过程，严重依赖于设计者的经验，如何提高冲模设计智能化程度一直是冲模CAD领域的研究重点。本文在分析冲模的实际设计过程和智能CAD系统基础上，建立了一个基于IDEF0的；中模CAD系统功能模型，设计实现了一个基于实例推理和粗糙集理论的智能冲模CAD原型系统，并对智能冲模CAD中实例表达、实例检索、实例评价与修改等关键技术进行了研究。使用该系统能提高设计质量和效率，缩短开发周期，降低冲模生产成本。     

利用信息化技术实现工业设计的新革命

依据计算机辅助设计(CAD)、计算机辅助制造(CAM)、产品数据管理(PDM)、虚拟现实(VR)等技术及工业设计的发展趋势,讨论了新工业设计革命的概念,分析了新技术的特点,预测了其影响及完成的时间。