虚拟制造技术在VE型分配泵研发中的实现

该文基于虚拟制造技术,从面向产品伞生命周期的角度,以汽车发动机VE型分配泵为研究对象,研究了以设计为中心的虚拟制造技术在汽车零部件设计中的实现。研究内容主要包括虚拟设计、虚拟样机、虚拟装配、有限无分析、虚拟加工仿真等,并对研究结果进行了实验验证。该文利用该研究力’法重点分析了VE型分配泵传动部件易断裂问题,并结合企业实际给出了解决方案。企业的成功实践表明．将虚拟制造技术应用于产品的开发与改进,是一种切实可行的设计理念和方法。     

虚拟制造技术及信息化

在当今经济全球化、贸易自由化和社会信息化的形势下,高新技术和新鲜思想的应用日渐深入企业日常生产,制造业的经营战略不断更新,由之前的规模效益衍生出多种多样的制造哲理,在各种新思维新体系的推陈出新的过程中。虚拟制造技术逐渐浮上台面,占据制造技术的一席之地,文章结合虚拟制造等新的制造技术的发展趋势,探讨了信息化制造的实质意义,以及虚拟制造技术在我国目前的发展概况和遇到的问题。     

浅谈人机工程分析软件在虚拟制造中的应用

在当前社会中,世界各地的企业之间竞争意识在增强,决定制造企业全球竞争能力的主要指标之一就是产品的开发时间、产品成本、产品质量以及产品应用.目前使用相对于广泛的就是“虚拟制造”技术,而人机工程分析则是虚拟制造”技术其中的一部分.为了适应目前市场的多变性质,减少企业成本和制作周期, “虚拟制造”技术逐渐成为最突出的一种.它能够在产品设计初期和开发的各个阶段有效的把握制造过程各个阶段的实际情况,同事也能有效的协调设计与制造各阶段之间的关系,以便使企业整体全局达到最优益.     

基于Web的零件库Web3Dlib的研发

互联网的普及使传统设计制造技术的应用环境发生了变化,CAD技术的应用也从孤立的应用环境转向网络环境。制造企业越来越注重信息和资源的共享。虚拟工厂、虚拟制造和动态企业联盟将成为CAD技术在电子商务时代继续发展的一个重要方向。目前,整个世界的制造业生产能力过剩。因此那些迅速发展的企业更多的在考虑通过专业化的协作搭建世界级的制造和供应网络。     

虚拟制造

编辑寄语:虚拟制造技术VMT(Virtual Manufacturing Technology)是20世纪80年代后期提出并得到迅速发展的一个新思想。它是以虚拟现实和仿真技术为基础,对产品的设计、生产过程统一建模,在计算机上对产品从设计、加工和装配、检验、使用等整个生命周期进行模拟和仿真。采用虚拟制造技术,可以在产品的设计     

运用CAE技术提高产品质量

一、引言自80年代以来，先进制造技术（如CIMS技术、并行工程、虚拟制造技术等）发展得很快，作为先进制造技术一部分的CAE技术受到了越来越多人的重视，现代企业运用CAE技术来解决以前无法解决或很难解决的问题以提高产品的质量，如产品在某一工作状态下，各零部件的受力变形情况的分析，或根据产品的性能指标进行优化设计等。CAE在整个制造过程中位于初级阶段，即产品的研制开发和性能分析阶段，如图1所示。图1 CAE在产品制造过程中所处的位置CAE是伴随着有限元法的发展而发展起来的。据文献记载，有限元法诞生于20世纪50年代。目…     

虚拟制造技术在导弹发射装置研制中的应用

该文从面向产品全生命周期的角度,介绍了虚拟制造技术在导弹发射装置研制中的应用。文章内容主要包括虚拟建模、运动学和动力学分析、有限元分析、虚拟装配、虚拟加工、计算机辅助工艺设计、产品数据管理等虚拟制造的关键技术。实践证明,虚拟制造技术能够大大地缩短产品的设计周期,降低设计制造成本,是新一代制造技术的发展趋势。     

虚拟制造体系及其关键技术

虚拟制造技术是由虚拟现实技术支持的新的研究领域,它是用三维的和动态的仿真模型模拟产品设计与制造及其相关的过程。虚拟制造系统是企业集成的一种新方案,本文给出一种基于集成概念的虚拟制造系统的体系结构。     

虚拟制造体系及其关键技术

虚拟制造技术是由虚拟现实技术支持的新的研究领域,它是用三椎的和动态的仿真模型模拟产品设计与制造及其相关的过程,虚拟制造系统是企业集成的一种新方案,本文给出一种基于集成概念的虚拟制造系统的体系结构。     

关于敏捷制造思想的几点思考

一、敏捷制造思想提出的背景进人90年代以后，随着新技术的更迭进一步加速及全球交通、通讯技术的飞速发展，西方发达国家优其是美国）工业界普遍感受到当前商务环境的变化速度已超过了企业自身跟踪和调整的速度。为了在世界经济中重振往日雄风，并在未来全球竞争中取得优势地位，美国国防部、工业界和学术界开始联会研究未来制造技术，并于1991年完成了《21世纪制造企业发展战略报告》。该报告明确提出了敏捷制造（AgileManufacturing）的概念，其基本思想便是通过把动态灵活的虚拟组织结构（VirtualOrganization）或动志联盟、先进的柔…     

Construction of a computer-simulated mixed reality environment for virtual factory layout planning

To survive the cut-throat competition in the manufacturing industry, many companies have introduced digital manufacturing technology. Digital manufacturing technology not only shortens the product development cycle times but also improves the precision of engineering simulation. However, building the virtual objects needed for a digital manufacturing environment requires skilled human resources; it is also costly and time-consuming. A high precision environment with the similar resources is also needed for a high precision simulation. In this paper, we propose a method of constructing a mixed reality-based digital manufacturing environment. The method integrates real objects, such as real images, with the virtual objects of a virtual manufacturing system. This type of integration minimizes the cost of implementing virtual objects and enhances the user's sense of reality. We studied several methods and derived a general framework for the system. Finally, we developed our idea into a virtual factory layout planning system. To assign the pose and position of real objects in virtual space, we applied a circle-based tracking method which uses a safety sign instead of the planar-square-shaped marker generally used for registration. Furthermore, we developed the framework to encapsulate simulation data from legacy data and process data for visualization based on mixed reality.     

通讯类电子产品风险规避探索

通讯类电子产品是当今世界发展最快的领域,该技术领域的知识更新速度是其它领域的4倍。进入21世纪,随着经济发展的全球化进程使我国通讯类电子产品面临日趋激烈的市场竞争,经济全球化进一步加剧,将电子产品管理导入战略管理思想。在当前我国三大通信运营商竞争格局下,为确保电子产品质量能稳步提高,最终以培养经济建设需要人才,通讯类电子产品要实现"三分天下有其一"的发展目标,必须从战略管理和电子产品核心竞争力的概念出发,必须加强电子产品管理创新。     

Practical simulation application: Evaluation of process control parameters in Twisted-Pair Cables manufacturing system

Intensive competition and rapid technology development of Twisted-Pair Cables (TPC) industry have left no room for competing manufacturers to harbour system inefficiencies. TPC are used in various communication and networks hardware applications; their manufacturing facilities face many challenges including various product configurations with different equipment settings, different product flows and Work in Process (WIP) space limitations. The quest for internal efficiency and external effectiveness forces companies to align their internal settings and resources with external requirements/orders, or in different words, significant factors must be set appropriately and identified prior to manufacturing processes. Integrated definition models (IDEF0, IDEF3) in conjunction with a simulation model and a design of experiments (DOE) have been developed to characterize the TPC production system, identify the significant process parameters and examine various production setting scenarios aiming to get the best product flow time.     

Integrated manufacture: A role for virtual reality?

Virtual Reality (VR) is fast becoming an affordable technology with potentially wide-ranging applications in many professions including education, medicine and industry. Its advantages over existing technology are primarily that users can visualise, feel involvement and interact with virtual representations of real world activities in real time.

A recently completed study, funded by the EPSRC, examined the feasibility of VR as a tool for UK manufacturing industry. Of primary interest was whether manufacturers perceive a use for VR in their inudstry and, if so, what impact they envisage it will have within their company. A national survey was distributed to over 2,000 UK manufacturing companies randomly selected and interviews carried out with existing users of VR technology. A brief summary of these results is presented.

A demonstration application was developed in desktop VR representing the manufacture of a consumer product in which various stages of the manufacturing process were featured including initial design, manufacture, and testing. The demonstration application is described in detail and user assessments are presented. On the basis of these findings, the potential future role of VR in integrated manufacture is discussed. Relevance to industry

In only a short time, virtual environments have become a focus of serious consideration as a tool for manufacturing and other industry. In order that VR has greatest industrial utility we need to examine and develop its potential as a specialism-free integrating medium within a simultaneous engineering approach.     

支持动态联盟的车间控制信息系统框架模型

随着世界市场的不断变化与市场竞争的加剧, 动态联盟将成为新的企业组织形态,动态联盟环境下企业间信息流的管理和控制问题越来越 受到人们的重视．车间控制器的设计和开发也必须适应动态联盟的需要．本文对敏捷制造信 息系统（AMIS）和车间的信息流程进行了分析和探讨,结合现有的网络技术、代理技术以及 分布工作流技术,提出了支持动态联盟的车间控制信息系统框架模型．     

An agent-based framework for global purchasing and manufacturing in a shoe industry

Global competition is forcing the present day industry to produce high quality product more fast and inexpensively. The need for fast information exchange has increased among the remote locations for the cooperation and coordination. In this study, a virtual global manufacturing system in a shoe company is constructed that distributes production schedule among remote places, acts as a bridge between the headquarters and manufacturing plants, distributes tasks and collates different solutions between demand and supply using an agent. It generates an order and a procurement plan. An order-supply agent is proposed and implemented to automate the process of ordering and supplying of goods in a shoe making company from the Internet environment.     

A virtual manufacturing system for components made of a multiphase perfect material

A component, which has an optimized combination of different materials (including homogeneous materials and different types of heterogeneous materials) in its different portions for a specific application, is considered as being made of a multiphase perfect material. To manufacture such components, a hybrid layered manufacturing technology has been proposed. Since it would be risky and expensive to make such a physical machine, virtual manufacturing technology is adopted to further study and optimize the hybrid layered manufacturing technology, so as to provide a reliable foundation for future practical manufacturing with a much better prospect of success, a shorter lead time, and a much lower investment cost. This paper develops a virtual manufacturing system for it.     

Design of a decision support system for machine tool selection based on machine characteristics and performance tests

Economic globalization, together with heightened market competition and increasingly short product life cycles are motivating companies to use advanced manufacturing technologies. Use of high speed machining is increasingly widespread; however, as the technology is relatively new, it lacks a deep-rooted knowledge base which would facilitate implementation. One of the most frequent problems facing companies wishing to adopt this technology is selecting the most appropriate machine tool for the product in question and own enterprise characteristics. This paper presents a decision support system for high speed milling machine tool selection based on machine characteristics and performance tests. Profile machining tests are designed and conducted in participating machining centers. The decision support system is based on product dimension accuracy, process parameters such as feed rate and interpolation scheme used by CNC and machine characteristics such as machine accuracy and cost. Experimental data for process error and cycle operation time are obtained from profile machining tests with different geometrical feature zones that are often used in manufacturing of discrete parts or die/moulds. All those input parameters have direct impact on productivity and manufacturing cost. Artificial neural network models are utilized for decision support system with reasonable prediction capability.     

A hybrid multi-agent system architecture for enterprise integration using computer networks

The manufacturing industries are now experiencing fierce pressure of competition from every corner on this planet. In addition, the advancement in computer networks and information technologies has been gradually reshaping the manufacturing companies by shifting from the industrial age to the information era. Due to these elevated competitiveness and advanced computer technology, a number of new manufacturing and management strategies (e.g., CE or CIM) have emerged for the innovation of manufacturing enterprises. Although they have different definitions and scopes, there are several common issues: inter-enterprise functions integration; inter-enterprise resources integration; and collaboration. This paper proposes a new multi-agent system (MAS) architecture to support the inter-enterprise functions/resources integration and collaboration over the networked environment, including the hybrid agent architecture and hybrid network architecture. In contrast to the existing agent architectures, the proposed agent architecture enables agents to exhibit the hybrid (continuous and discrete) behavior and interactions. In addition, our network architecture is more suitable for building the large-scale distributed manufacturing systems that are prone to dynamic random changes of their environment. Based on the proposed MAS architecture, a collaborative product development environment is implemented as a starting point, and a multidisciplinary team-oriented design problem is illustrated to provide the vision of the proposed MAS architecture.