基于产品族参数化模块的飞机零件工艺装备变型设计技术

针对飞机零件工艺装备结构相似、细节结构变化大的特点,提出了一种基于参数化模块的飞机零件工艺装备变型设计的方法。基于零件的相似性和工艺要求提取飞机零件工装产品族,在产品族内对模块进行划分与组合实现变型设计。基于设计结构矩阵的方法对零件工装进行模块划分,并对划分后的模块进行参数化设计。当有新的工装设计任务时,可以通过比对零件特征以及工艺找到对应产品族,通过产品族内模块选择与组合,并基于参数化修改达到快速变型设计的目的。最后以飞机常用钣金零件翻边成形模具进行实例验证验证。     

适应现代汽车变速箱制齿夹具设计要求的成组技术

机械加工应用GT的工艺设计方法是以一组相类似零件为考虑对象完成所有零件的工艺设计，是提高目前工艺合理化、标准化的一种新方法，它能够提高劳动生产率，缩短制造周期，降低产品成本。本文所述是作者通过实践运用GT设计制齿夹具实现产品生产流转速度化的经验介绍，供多品种、中小批生产企业参考。     

基于工艺元的零件工艺聚类方法研究

为实现专用机床产品的定制设计,需将待加工零件的工艺特征在不同约束条件下聚合重组,作为机床设计的依据。通过分析待加工零件的工艺特点,提出以工艺元为基本单位的零件工艺规划方法。以特征工步为基本工艺元,将零件的工艺元在不同约束条件下聚类形成基本工艺序列,为机床结构的设计提供了依据。最后以面向某型号的缸盖加工的专用机床为设计对象,对本文的方法进行了说明。     

基于3D图形单元技术的轴类零件自动设计

通过对轴类零件的结构分解，提出了3D图形单元的概念，以参数化设计思想为依据，建立3D图形单元库，并对图形单元进行变型设计；应用图形单元的拼接和置换算法，实现轴类零件自组织设计；开发了用对话框形式进行人机对话的轴的自组织设计系统，实现了产品的智能化设计，有利于提高轴类零件的设计质量和效率。     

制齿夹具设计要求的成组技术 适应现代汽车变速箱

机械加工应用GT的工艺设计方法是以一组相类似零件为考虑对象完成所有零件的工艺设计,是提高目前工艺合理化、标准化的一种新方法,它能够提高劳动生产率,缩短制造周期,降低产品成本。本文所述是作者通过实践运用GT设计制齿夹具实现产品生产流转速度化的经验介绍,供多品种、中小批生产企业参考。     

面向产品的CAPP系统开发中的几个关键技术

将传统的以零件为对象的工艺设计理念转变为面向整个产品进行工艺设计和工艺管理,扩大了CAPP的应用领域,推进了CAPP向集成化方向发展。文中详细介绍了面向产品的CAPP系统开发的指导思想及产品结构树、工艺设计、工装设备查询和工艺卡片输出模块的主要实现技术。     

专家系统技术在覆盖拉延件工艺设计中的应用研究

阐述在覆盖拉延件工艺要领设计中，专家系统技术研究的必要性和应用前景，以人机一体化思想为指导，提出系统的总体结构，并结合覆盖拉延件要领设计的特点，对零件信息特征建模，面向对象知识库等关键实现技术进行论述。     

面向制造单元的成组工艺设计研究

通过对制造单元加工流程的分析,基于工艺流程相似性,以成组技术为主旨,研究了面向制造单元的零件组织模式及工艺设计方法。为拓展单元产品谱系,提高单元价值创造比。以零件族为单位,提出了单元内核心业务模块和外围模块相结合的零件分层组织模式,从而形成了将众多制造流程相似零件持续导入对应制造单元的规范。在成组工艺设计中,面向单元,以优秀工艺知识继承和重用为指导思想,通过零件编码分组、典型结构工艺性分析、成组工艺设计、工艺知识数据库的建立,实现基于成组技术的制造单元内相似零件工艺快速设计。     

典型接头零件加工工艺及常见问题解决方案

为实现航空制造领域典型接头零件优质高效生产制造,选取3类典型接头零件作为研究对象,分别进行零件结构及难点分析、生产过程常见问题梳理、典型工艺流程设计、专用定位及加紧方式选择、加工效果优缺点评估,实现典型接头零件实际生产经验的总结和归纳,为同类接头零件的工艺设计及生产制造提供参考。     

基于典型工艺的航空发动机轴类零件工艺设计方法研究

为了提高航空发动机的工艺设计效率,实现零件工艺快速生成,以轴类零件为代表,在分析其结构及工艺特点的基础上,提出一种基于典型工艺的工艺设计方法.该方法针对不同轴类零件,分别采用典型实例工艺和典型模板工艺进行新工艺设计.在此基础上研究了基于典型实例工艺的工艺设计关键技术,包括零件实例信息建模、实例工艺检索、实例工艺修订.详细说明了零件参数库的建立、工艺参数化关系的建立及实现等基于典型模板工艺的参数化工艺设计关键技术,并给出了应用实例.     

移动屋盖开合机械的设计方法

移动层盖结构是一种新型建筑结构，它能使屋顶在短时间内移动，让建筑物在屋顶开启和关闭两个状态下都可以使用。在移动屋盖的工程设计中，移动屋盖的开合机械系统设计和常规建筑结构有很大的区别，移动屋盖开合机械系统的设计尚无相应的设计规范和设计标准。结合设计实例论述开合机械设计的设计方法及应注意的问题。介绍了目前建成的移动屋盖的运动方式，阐述了移动屋盖的设计方法和机械驱动系统的实现，探讨了移动屋盖顶的设计标准和安全措施。     

The development of a CAD environment to determine the preferred build-up direction for layered manufacturing

Stereolithography is a process used to produce polymer components rapidly directly from a computer representation of the part. There are several factors to be considered in order to make efficient use of the process. In particular, the build-up orientation of the part critically affects the part accuracy, the total build time and the volume of the support structures. The purpose of this study is to determine the optimal build-up part orientation for the StereoLithography Apparatus (SLA) process to improve part accuracy, and minimise the total build time and the volume of the support structure. Additionally, an algorithm is developed to calculate the staircase area, quantifying the process errors by the volume of materials supposed to be removed or added to the part, and the optimal layer thickness for the SLA system which can handle the variable layer thickness. Thus, the optimal part orientation is determined based on the user's selections of primary criteria and the optimal thickness of layers is calculated for any part orientation.     

A study on thick plate forming using flexible forming process and its application to a simply curved plate

In this study, design and fabrication of a flexible forming machine are carried out for the purpose of manufacturing a prototype of curved plate block for hull structure used in shipbuilding industry. Flexible forming dies which consist of numbers of punches in an array form for upper and lower sides are designed in view of thick plate forming. A punch has formation of male and female screws to adjust its length with regard to a given surface, and all punches are supported by each other in punch housing. Software for process configuration and punch control are developed to operate the novel flexible forming machine. The software are composed of the punch height calculation part which uses an offset surface scheme. Prior to manufacturing of a prototype, numerical simulations for a saddle-typed thick plate forming process including metal forming and spring-back analyses are carried out to predict the forming performance. Experiments are also carried out to validate and confirm the feasibility of flexible forming technology in view of practical application of thick plate forming process. Curvature radii observed in the simulation and experiment are investigated and compared. Consequently, development and practical application of flexible forming technology to the thick plate forming process are described from design of the forming machine to manufacturing of the prototype. It is confirmed that the flexible forming technology suggested in this study has enough feasibility in new application of thick plate forming in shipbuilding structures which has been formed through expensive and laborious conventional line heating.     

基于结构预映射的产品建模

零件建模和装配建模是产品建模的两个方面,对制造企业的竞争力有重要影响。在当前的计算机辅助设计系统（Computer-aided design,CAD）中,尽管两者已高度集成,它们在过程层面仍然存在相互割裂的现象。为此,提出一种基于结构预映射（Structure pre-mapping,SPM）的产品建模方法。首先对产品建模过程及SPM进行系统分析,明确实现SPM需要完成的主要任务;其次,详细阐述SPM的内涵,并对其进行形式化定义,以便于在CAD系统中描述;第三,基于前期发展的装配特征偶概念,对存在于设计者头脑中的设计意图（表现为抽象配合结构和配合行为）进行系统建模,形成实现SPM的基础;第四,提出基于SPM的产品建模原理,进而展示相应的框架,并分析框架的功能模块及其实现方法;最后,通过HP发动机空气过滤器头部组件的产品建模实例论证方法的可行性。该方法可在过程层面上提高产品建模的集成程度,对于现有CAD建模理论和技术体系的丰富和发展有一定的积极意义。     

链条固定装置的结构设计

链条固定装置是锚杆钻机的重要装置,论文是针对现用结构的缺陷进行的改型设计。文章根据现用装置的破坏形式分析了其结构问题,提出了三种可供选择的结构形式,并分析了这些结构的优缺点,确定了后续设计的关键点。通过对这些备选结构进行结构比较和强度分析。最终选择了一种可以使用的结构形式。     

Solidworks结构分析在水下机器人设计中的应用

介绍了Solidworks结构分析插件simulation的基本功能,利用该插件的有限元分析功能,对水下机器人推进器支撑架和耐压壳体进行了应力分析,并依据设计目的对部件进行了结构优化,结果表明,Solidworks Simulation应用于水下机器人设计可简化设计流程,提高设计效率,能够得到接近于水下机器人实际应用的分析结果。     

A graph theoretic approach linking design dimensioning and process planning

The purpose of this paper and its companion (Part 2) is to present a rigorous graph theoretic model to link designing with process planning. This paper shows how to generate process plans from design dimension trees. It is the foundation for the companion paper, Part 2, which shows how part dimensioning (during designing) can be guided by knowledge of the datum-hierarchy tree structure underlying process plans. Design dimensions are represented as a design dimension tree, which is the basis for defining an ideal (optimal) datum-hierarchy tree of a process plan. The ideal datum-hierarchy tree, in turn, is used to define measures of process planning efficiency. These measures can be utilised to compare actual process plans and improve manufacturing processes. An example is presented to illustrate the concepts and method.     

A holistic approach for the problem of storage space allocation in cellular manufacturing

Storage spaces are vital resources that must be allocated strategically in the design of cellular manufacturing systems. In this paper, a new storage space allocation approach was developed. A linear programming model was used to allocate available storage spaces among manufacturing cells, and an algorithm was used later to adjust the allocation levels based on the storage space availability. A simulation analysis aimed at determining the long-term effects of the space allocation on system performance was also performed. A sample problem was used to illustrate the allocation process. The results indicate that the developed model and the adjustment provided by the algorithm decrease the number of unsuccessful load transfer attempts by the intercell handling system.     

基于APDL的柱塞泵螺纹参数化有限元分析

在进行柱塞泵螺纹设计及其优化设计时,将参数化设计引入到有限元结构分析中,实现结构参数快速调整,自动生成分析模型并完成分析过程,可极快地优化产品结构、缩减产品设计周期.文中利用有限元分析软件ANSYS提供的APDL语言,实现了有限元建模和分析的参数化,并以柱塞泵螺纹为例,提出一种办法,避免了重复的有限元建模与前、后处理操作,明显提高了分析效率.