面向虚拟装配的装配建模技术

虚拟装配设计被认为是对装配设计的技术革新 ,它利用虚拟外设把装配设计的过程自然地扩展到三维空间。本文通过对传统装配建模技术的深入分析 ,提出了一种面向虚拟装配设计环境的信息集成装配模型表达 ,并对此装配模型进行了物理属性扩展 ,很好地满足了虚拟环境中装配设计对装配体信息的需求。     

柔性装配系统的总体评价

从柔性装配系统的构成出发,提出了对柔性装配系统进行评价的４个指标：经济性、装配柔性、可靠性及计算机控制管理水平,从总体评价的角度探讨了对ＦＡＳ的评价,以作为进一步对ＦＡＳ进行优化设计的依据。     

基于DFMA的摆线针轮行星减速器的装配设计

提出了将ＤＦＭ 和ＤＦＡ结合进行面向并行工程的ＤＦＭＡ 研究的设想,介绍了将ＤＦＭＡ应用于摆线针轮行星减速器设计的原型系统,重点分析了摆线针轮行星减速器产品的设计,进行了产品装配关系分析、建立装配性能评价系统,在Ａｕｔｏｃａｄ 环境下完成三维模拟拼装     

面向对象的柔性装配系统约束网络建模与设计

通过对柔性装配系统的领域分析,运用并行设计的思想建立了面向对象的ＦＡＳ统一概念设计模型,并进一步将其转化为ＦＡＳ并行设计系统的约束网络模型。最后提出结合面向对象概念和数据库技术来完成ＦＡＳ模型库的计算机实现,从而使整个ＦＡＳ模型的构成具有高度的柔性、适应性与可扩展性,为设计一个高性能的ＦＡＳ打下基础。     

Pro/Engineer中装配仿真的实现方法

装配仿真能实时检测和改进产品的可装配性。提出一种可以实现零件在装配路径上进行连续运动的装配仿真方法。在装配体的基准零件中利用草绘工具规划出装配路径，在将要装配到基准零件上的零件中定义装配基准点。利用Mechanism模块的槽从动机构将装配路径定义为槽曲线，将装配基准点定义为从动机构点。根据槽曲线的空间形态定义伺服电动机即可驱动零件实现装配过程仿真。利用“回放”命令还可以重新演示装配过程以及进行实时干涉检测。     

机械产品的装配与拆卸设计

装配与拆卸设计是绿色设计的主要内容，产品装配与拆卸性的好坏对产品使用过程中的维护及废弃淘汰后的有效回收利用有着重要意义，装配与拆卸在现代生产良性发展中起着重要的作用，已成为机械设计的重要内容。     

面向装配设计中装配方案的选择

装配序列规划的基础上，从降低装配难度、缩短装配时间等方面对装配方案作了研究。提出了装配方案选择的约束条件，并结合实例进行了分析。本文提出的方法为面向装配设计中装配方案的选择提供了依据。     

基于质量特征产品装配顺序规划的逆向推理算法探究

在Petri网柔性装配系统装配顺序规划中引入装配质量要素,并以装配零件的装配自由度,装配作业后稳定性,装配零件配合精度对装配质量的影响作为基本因子,提出装配质量置信度概念,解决柔性装配系统装配规划中装配质量及其定量化问题。根据装配形成的产品在Petri网装配状态图中表示为一个最终库所的特点,应用改进B树模型,提出仅以变迁信息的产品装配顺序规划Petri网逆向推理算法,简化装配顺序规划推理过程,对于多个变迁均可生成最终成品的情况,亦给出装配顺序规划的解决方案,并以摩托车发动机的装配为例,证明该算法是可行的。     

基于事例推理的装配顺序规划研究

就现有的计算机辅助装置顺序规划研究中存在的不足,提出基于事例推理（ＣＢＲ）的装配顺序规划思路,研究基于ＣＢＲ的装配顺序规划中的关键技术,开发出产品装配分析原型系统ＰＡＡＳ。系统包含装配数据建模,装配顺序规划和综合ＤＦＡ分析等功能。结合原型系统实例讲解基于ＣＢＲ的装配顺序规划的实现方法。     

并行工程关键技术--DFA的研究与应用

该文分析了并行工程设计过程的特点、PDM的集成框架和关键使能技术DFA。研究了面向装配设计的体系结构,产品设计与装配过程之间的并行关系。提出了基于并行工程的产品装配的集成框架体系结构,并借助于一些商业软件(CATIA、DELMIA)来实现产品概念设计、几何建模、工艺设计、工艺规划和过程仿真。介绍了在并行工程理念下DFA技术在轿车驾驶舱装配开发中的应用。     

并行工程中面向装配的设计

对计算机辅助装配序列规划作了分析 ,提出了产品可装配性评价的层次分析方法 ,分别从零件层和装配层对可装配性作了分析 ,在此基础上实现了面向装配的设计和计算机辅助装配序列规划集成。     

再制造性综合评估研究

以基于装配的设计(DFA)和现有两种再制造的评估方法为基础，提出了一种产品再制造性综合评价体系。该体系改进了已有评价模式，新建和修改了评估指标和定量计算公式，以模块方式建立的评价模式既可全面评价产品再制造性，又可兼容已有评价方式。一方面为产品再制造设计提供定性和定量的依据，另一方面可为再制造企业对已有报废或损坏产品实施再制造提供评估意见。最后给出了柯达Funsaver相机再制造性计算实例。     

并行环境下装配设计的系统设计及开发技术研究

分析了并行工程中各功能模块之间的关系和系统的构成,从分析装配设计在并行工程中特定的作用入手,系统地论述了其在并行工程中的运行模式和系统结构,对其中的关键技术（包括装配建模、装配序列规划、装配公差分析、运动机构分析求解、装配过程仿真等）进行了全面的研究,并在作者开发的Ｐｒｏ／Ｅｎｇｉｎｅｅｒｉｎｇ环境下的装配设计系统中进行了实际的开发与应用。     

A systematic approach for 3D VRML model-based assembly in Web-based product design

Collaborative virtual assembly design is often considered complicated and hardly achievable, for it requires high real-time performance, platform independence, and model synchronization. In order to satisfy all these requirements, a VRML-based virtual assembly solution is proposed. This paper first presents a synchronous moving-searching algorithm for retrieving information from the basic assembly model (BAM) and target assembly model (TAM) in order to give Internet-based collaborative assembly capabilities to these VRML files. Then, a set of assembly approaches for VRML models are systematically addressed to implement the assembly according to constraints of link relations. The advantages of the algorithm and assembly approaches are their high computational efficiency and ease of implementation, which enriches works of Anton and Gorazd (2003) and Qin et al. (2004) with respect to accessibility and maneuverability of VRML model-based assembly design. Moreover, the realization method of collaborative assembly over the Internet is introduced. Finally, some actual examples of collaborative virtual assemblies systems are provided to illustrate the application of these approaches.     

Associative assembly design features: concept, implementation and application

This paper presents a new type of feature, associative assembly design feature. Its concept, implementation, and application are introduced. This new feature allows the following associations: (1) between parts that have not been defined geometrically; (2) between geometric entities defining interfaces between parts; and (3) between part geometry and intermediate geometry used to define a part. The associations can be geometric or non-geometric. Our extension to traditional assembly feature properties allows product architectures to be defined using features. These architectures, in turn, can be used to constrain the modular design of assembly geometry. The application is a mould base library for injection mould design.     

挺柱自动装配设备的结构设计

介绍该挺柱自动装配设备的工作原理、主要机械结构及工作流程.该设备已交付用户使用,并得到好评.     

The application of virtual reality to tasks in manufacturing and assembly engineering

Virtual Reality is a developing technology for which a range of applications are heing explored by different international research groups. This paper describes recent research in the application of Virtual Reality to two important manufacturing and assembly tasks which have a direct influence on the speed of introduction of new products. The tasks are the production of planning documentation for assembled products and the design and planning of the cable harnesses which form part of all electro-mechanical assemblies. The research completed so far demonstrates the potential of Virtual Reality, even at its current stage of technological development, to make a significant contribution in both these cases.     

A systematic method of adaptive joint design considering different assembly sequence in sheet metal product

In sheet metal assembly, not only the component variations and tool errors, but also the component structure (joint type) and assembly process (assembly sequence) affect the final dimensional quality. In this paper, a systematic method for adaptive joint design considering different assembly sequence is proposed to meet the in-process dimensional adjustability of KCs (key characteristics). First, the adaptive characteristic of the sheet metal joint is depicted. Then, the mathematical model in order for concurrently optimizing both joint type and different assembly sequence is presented. How to evaluate the combination of joint type and assembly sequence is carried out according to two conditions: (1) for single KC, and (2) for multiple KCs. The KC confliction is considered to ensure the important KCs. Genetic algorithm is used to resolve the optimization of joint design. An example is chosen to demonstrate our method finally, and various joint designs are acquired according to different assembly sequences by this means. The proposed methods make it possible for us to improve the dimensional quality of product in the design stage.     

Integrated intelligent design and assembly planning: A survey

This paper reviews the relevant literature of the development of methodologies and systems for integrated intelligent design of assembled products and processes. Based on a combination of the concurrent engineering approach and artificial intelligence techniques, an assembly oriented intelligent scheme for the integration of design and planning is proposed, in which the following components or activities are considered and carried out concurrently and intelligently: assembly modelling and design (conceptual design; preliminary design; detailed design), assembly process planning, assembly system layout and design, assembly simulation, econo-technical (e.g. assembl-ability, assembly time and cost) and ergonomic analysis and evaluation. The literature is reviewed and discussed in relation to the methodologies and systems of implementing the above components or activities and an integrated environment to support them. In addition, some research of our group on this topic is introduced.