基于有限元分析的减速机箱体造型设计

为解决减速机箱体相似度大、厂家品牌识别度低的问题,提出将把箱体技术要求、企业文化内涵和中国传统文化等融合在减速机箱体外观的设计理念中。将有限元分析方法引入传统的减速机箱体造型设计流程,运用Creo2.0软件进行三维设计并建模;用Ansys Workbench软件对设计模型进行有限元分析;提出了造型与结构一体化的设计方法,通过此方法达到提高各减速机厂家品牌识别度的目的,从而提高产品的竞争力,增强产品造型的创新性,提高造型设计效率。     

基于UG NX的离心泵叶轮叶片三维造型系统开发

叶片水力模型提供的叶片表面型值点柱坐标不能直接用于UG NX三维造型.在叶片水力模型的基础上,给出计算叶片表面型值点直角坐标的算法流程,介绍沿轴面截线方向进行叶片三维造型的方法,简述基于UG NX平台的叶片三维造型二次开发的步骤,定义程序开发的数据结构,在支撑软件UG NX中程序化实现叶片的三维实体造型.实际使用结果表明该方法可以缩短叶片类产品的设计周期,提高设计精度.     

基于UG的修边镶块参数化设计方法

在汽车覆盖件修边模设计中,由于修边镶块种类和数量繁多,而且每种镶块的造型不尽相同,若用传统的造型方法不仅周期长、效率低,而且还不能快速的响应客户的需求。本文在参数化建模的基础上,提出了串行和并行相结合的造型方法,规范了造型的顺序,给出了具体的流程,并在实际过程中提出了产品设计的关键技术,结合具体的实例进行了讲解。     

钛合金叶片等温校正模具设计

TC11钛合金叶片是航空发动机的重要部件之一,其型面复杂、质量要求高,在成形过程中常因锻造后的残余应力和温度应力的作用而发生翘曲变形,最终导致报废.采用等温校正工艺可使翘曲变形减少,叶片型面达到合格要求.本文采用三维设计软件Pro/E针对等温校正模具进行设计,主要解决模具型腔的造型问题,进行叶片的三维曲面造型,同时设计等温校正模的加热冷却装置.其设计流程为:创建叶片的三维实体→对叶身进行加放余量→利用实体创建模具型腔→添加模具结构件→设计加热冷却装置.     

汽车前轴产品开发流程

简述了汽车前轴新产品开发流程。以B02汽车前轴新产品开发为例,介绍了汽车前轴的零件三维造型设计,转换成二维图纸,三维模具造型设计,模具二维图纸设计,模具CNC加工,模具调试,小批量生产,并介绍了新产品开发中影响品质的主要问题与预防措施。     

年产3万吨汽车底盘铸件的车间设计

介绍了年产3万吨汽车底盘铸件的车间设计过程。熔化设计采用2套5 t中频无芯感应电炉,造型采用2条水平脱箱造型线,配套120 t砂处理系统,制芯采用冷芯和热芯相结合工艺,同时对清理流程进行了说明。车间工艺布局合理,物流顺畅,建成投产后,生产运转情况良好。     

铸件清理损伤原因及措施

从铸件清理全流程出发,综合分析铸件损伤类型、特点、原因,并从铸件浇冒口设计、造型、清理三方面提出对策：提高操作者质量意识、优化清理方式与工具、优化造型过程、优化铸件浇冒口结构等,以此来降低铸件清理损伤率。     

树脂砂造型线的应用

在单件小批量多品种的生产条件下,采用树脂砂铸造的优越性已众所周知,但利用造型线实现中大型铸件机械化造型国内尚不多见。北京人民机器总厂与保定铸机厂合作完成了年产8400t铸件的树脂砂铸造车间造型线的设计制造任务,并于1989年投产。     

第九届海峡两岸材料腐蚀与防护研讨会将于武汉举行

正第九届海峡两岸材料腐蚀与防护研讨会将于2014年10月8~14日在武汉大学举行。该会议由武汉大学、华中科技大学、武汉材料保护研究所、金属腐蚀与防护国家重点实验室、中国地质大学、武汉科技大学承办,科技部海峡两岸科技交流合作中心和国家自然科学基金委员会支持。会议主题为腐蚀防护技术与两岸可持续发展,将就新形势下发展和扩大两岸科技及产业交流与合作进行深入、广泛的研讨,共同商讨两岸科技合作的重点,协调和整合相关科技资源,构建两岸科技合作机制。会议还将围绕科技创新政策及两岸创新合作,科技计划管理、科技资源共享,科技产业的发展     

V法铸造圆弧形铸件质量控制

介绍了V法铸造的基本原理和采用V法铸造工艺生产圆弧形铸件的主要流程,通过对圆弧形铸件结构特性和铸造工艺性进行分析,合理选择分型面并设计计算浇注系统、冒口和工艺拉筋尺寸,严格控制造型、熔浇过程质量,确保铸件外观圆弧度、装配尺寸、铸件机械性能合格。     

实现数字化设计与制造的关键技术

从制造业信息化的要求出发,提出实现数字化设计与制造五个方面的关键问题,即产品统一数据模型表示方法、企业间产品数据交换、数据集成、异构环境下应用功能的集成、过程集成。同时阐述了解决以上五个方面关键问题的具体关键技术,从而可构建实现基于网络的数字化设计与制造的协同工作平台。     

Design method for systematic safety integration

In the discipline of product design, safety barriers implementation for risk reduction usually intervenes in the end of the design process, in the detailed design stage, and are rapidly increasing in variety, size, complexity and sophistication. In fact, there is no formal method to set safety requirements in the early design from knowledge abstraction. This paper looks at the problem of synthesizing safety solutions in the early design process. A structured method is proposed for systematic safety requirements definition through experience feedbacks and technical solutions analysis. The application to the agricultural hitching system, the three-point hitch, is then developed. Finally, the requirements formulation and their impact on the solution are explained.     

Working situation model for safety integration during design phase

The fact that the design of equipment and machines can no longer be separated from the concept of human safety has led to the definition of criteria which is linked to the equipment's exploitation and must be taken into account during their design. Firstly, this paper looks at the problem of integrating safety into design as early as possible, reviews the state of the art and examines the research carried out on this subject to date. The area of application of our research is then presented. The production system analyzed is an offset printing line. We propose a system model by defining the working situation and the elements characterizing this situation as well as the concepts relative to these elements. The model is presented and the method is illustrated by the results of an experiment carried out in the design department of an industrial partner. The ultimate aim is to provide designers with the means of integrating information about the potential work context into the equipment's design process from the onset.     

基于性能驱动的设计过程Petri网建模

讨论了一种基于性能驱动的设计过程Petri网模型。根据性能驱动设计两种数据模型定义了性能库所和结构库所；通过引入痕迹托肯及基点火规则描述了设计活动中各种数据信息流动；以电磁轴承转子系统设计为例进行了建模和分析。     

An architectural approach to the integration of safety and security requirements in smart products and systems design

Assuring functional safety and IT security is rapidly becoming an essential key challenge to the design of any connected smart product and industrial manufacturing system. This paper proposes an architectural approach to the integrated consideration of functional safety and IT security requirements in the design process of smart products and the (Industrial) Internet of Things (IIoT). Based on axiomatic design and signal flow analysis, it shows that such requirements have related impacts on system architectural design choices rendering integrated design necessary to meet the desired risk reduction levels effectively and efficiently. A case study in the automotive domain is presented in order to illustrate and validate the proposed approach.     

Adaptable Design

Increasing competition for better product functionality, quality, features, customization, environmental friendliness, lower cost and shorter delivery time presents unprecedented challenges for product manufacturing enterprises. These challenges cannot be completely addressed by advanced manufacturing technologies alone as some of which are originated from product design. Advanced design technologies and tools for early product design processes are critically needed where most important decisions are made with respect to the product functionality, quality, manufacturability, cost and environmental performance. This paper discusses adaptable design (AD) as a design paradigm for both business success and environmental protection. Adaptable design aims at developing products that are adaptable in their design and/or their production. Adaptability is defined as the extension of the utility (service) of products. Two types of adaptabilities are proposed as product adaptability and design adaptability. Two types of design adaptations are also identified, which include foreseeable specific adaptations and unforeseeable general adaptations. The former can be described by specific adaptability and the latter by general adaptability. Three key elements of AD are presented including functions independence, a measure of adaptability and a function based design process model of the AD. Based on these concepts and design objectives, adaptable design methods and general design guidelines are proposed. Examples are included to illustrate the concepts, design methods and guidelines.     

Synthesis of verification models in multidisciplinary design of complex engineered systems

In designing complex engineered systems, various experiments and simulations are needed for the verification of design hypotheses. Because the conducted verification is multidisciplinary, synthesis of these verification results should be based on a neutral model regarding the domains and disciplines. This paper introduces a metamodel, to which the roles and designers’ intentions (i.e., design situation) of various verification models are referred, and uses it for analyzing the synthesis process. The design of a paper-handling device is used for an analysis example, which clarifies advantages and drawbacks in modeling the synthesis process with such a metamodel.     

Knowledge Brokering for Assisting the Generation of Automotive Product Design

The aim of this paper is to present a pragmatic model for the systematic transfer of ideas and knowledge at the early stage of product design in a company environment. In using the model, the basic premise is not to build a new product ‘from scratch’ but to reuse existing ideas and knowledge from other objects and products developed previously. This new approach is called Knowledge Brokering (KB).The developed KB model consists of four sequential steps, which cover the collection and clustering of explicit design knowledge, the systematic learning process, retention and transfer of tacit design knowledge. The premises for using the KB model and case study results from the automotive industry on the advantages and limitations of the new approach are also described.     

产品设计的相似性模型

首先分析了产品设计过程,将其分为原理设计、结构设计和工艺设计3个阶段。产品的相似性体现在产品原理的相似性、结构的相似性、工艺设计的相似性与设计手段的相似性,在此基础上提出了产品设计的相似性模型,用相似性分析可以丰富产品设计的方法,缩短产品设计周期,拓宽产品设计的思路。     

Virtual Reality Approaches for Immersive Design

The current application of virtual reality (VR) systems in the design process is limited mostly to design review. The reason for this limitation is the different data formats used for CAD and VR visualization. To use the benefits of VR during the design process, solutions for immersive design - the model manipulation inside the VE based on CAD data - are required. There are different approaches allowing VR systems to work as an active development platform. Three examples introduce the realization of the integration of CAD and VR software at different levels by the online coupling of complete applications or by integration of CAD core functionalities in VR systems.