A web-based advisory system for process and material selection in concurrent product design for a manufacturing environment

This paper reports the work of selecting suitable manufacturing processes and materials in concurrent design for manufacturing environment. In the paper, a fuzzy knowledge-based decision support method is proposed for multi-criteria decision-making in evaluating and selecting possible manufacturing process/material combinations in terms of the total production cost. Based on the proposed method, a prototype Web-based knowledge-intensive manufacturing consulting service system (WebMCSS) with the client-knowledge server architecture is developed to help designers/users find good processes and materials while still at the conceptual level of design. The system, as one of the important parts of an advanced design for manufacturing tool, is a concept level process and material selection tool that can be used as both a standalone application and a Java applet freely available via the Web. Interlinked with Web pages of tutorials, and reference pages explaining the facets, fabrication processes and material choices, the system performs reasoning and calculations using the process capability and material property data from the remote Web-based database and knowledge base that can be maintained and updated via the Internet. The use of the system is illustrated with an example.     

A knowledge-based design advisory system for collaborative design for micromanufacturing

The manufacture of microproducts differs from that of conventional products in many ways, not only in the sizes, but also in issues concerning the effects of material properties, tools, and manufacturing equipment. There was a need for a new design methodology and associated design tools to aid designers in assessing the design of their microproducts by considering new micromanufacturing capabilities and constraints. A knowledge-based design advisory system (DAS) was, therefore, developed in MASMICRO in which the knowledge-based system with dedicated assessment modules and knowledge representatives based on the ontology was created to implement the distributed design and manufacturing assessment for micromanufacturing. The modules address the assessment on geometrical features relating to manufacturability, manufacturing processes, selection of materials, tools, and machines, as well as manufacturing cost. The Microsoft C# programming language, ASP.NET web technology, Prolog, and Microsoft Access database were used to develop the DAS. The test on the DAS prototype system was found to provide an increase of design efficiency due to more efficient use of design and manufacturing knowledge and afforded a web-based collaborative design environment.     

基于ASP的工程设计系统研究

利用ASP技术建立网上动态工程设计系统，利用Java小程序进行工程设计的程序编制，通过脚本语言将Java Applet嵌入到ASP中及Java小程序基于JDBC对Web数据库的访问，提出了基于ASP技术的工程设计系统的一种方案。     

基于Internet的远程设备监控系统

介绍了基于Internet的远程设备监控系统,它采用客户端(浏览器) 服务器 控制端结构。客户端采用Java编写的applet,放置于服务器上,用户可以通过W eb浏览器远程登录访问系统,对各设备进行监控维护。     

面向绿色制造的工艺规划支持系统及应用

针对绿色制造研究中缺乏明显改善环境友好性的实用方法和工具的问题,开发了一种面向绿色制造的工艺规划支持系统。该系统主要由工艺要素选择、工艺过程优化和工艺方案绿色性评价3个功能模块,以及相应的模型库组成。支撑数据库主要提供各种绿色特性数据,包括工艺绿色特性数据库、工艺清单数据库、机床数据库、刀具数据库和切削液数据库等。在数据库和模型库的支持下,对工艺过程中的原材料消耗、辅助原材料消耗、能量消耗和环境排放物等进行优化和评价,从而辅助工艺人员优化和改善产品和零件制造过程的绿色性。通过某机床厂齿轮工艺过程的规划实例,验证了该系统的可行性。     

支持网络化制造的车间MES与CAPP集成研究

网络化制造已成为现代制造业的主要发展趋势,制造执行系统(MES)和计算机辅助工艺规划(CAPP)是企业实施网络化制造的重要技术。本文首先分析网络制造环境下MES与CAPP的新特征,然后研究网络制造环境下的MES和CAPP集成的必要性和实现集成的关键技术,最后给出基于W eb系统集成的数据库设计。     

基于Android手机的智能点餐系统设计

针对高档饭店品牌营销服务需求,设计了一款基于Android手机的无线点餐系统.结合Android体系架构和点餐流程,采用模块化设计思想对客户端和服务器端功能模块等进行设计;分别以MySQL和Sqlite数据库作为服务器端和客户端数据库,并从逻辑、物理结构等方面对数据库进行搭建;利用Java语言和Eclipse开发工具,对客户端功能进行开发;利用JDBC实现客户端与服务器端的连接.最后通过系统功能测试,能正常登录,基本满足高档饭店的智能点餐需求.     

Internet-Based Collaboration System: Press-Die Design Process for Automobile Manufacturer

To survive in a severe competitive environment, manufacturing enterprises must accomplish objectives such as cost reduction, quality improvement and short time-to-market. Also, as the manufacturing environment becomes more globalised and distributed, it is important to manage the workflow harmoniously and to share the information efficiently among geographically dispersed users. In this research, we propose a collaborative design and engineering system, which manages various design processes in an integrated manner and enables the sharing of design information. Because design information is usually very large in its size, it is very difficult to synchronise the individual design data of each designer with the entire design data. As a solution for efficient data sharing among the designers in networks, CORBA can be applied to synchronise the states of the design information. If one user modifies design data on his/her computer, this operation is detected and transmitted to other users who are related with the design modification. A receiver’s computer automatically synchronises its data with the sender’s message. In this paper, an Internet-based collaboration system for a press-die design process for automobile manufacturers is developed with CORBA, Java, Java3D and a relational database system. After modelling a practical press-die design process with the UML language, workflow routing paths are created by the modelling data. Cost and time for design can be estimated by the concurrent quasi-procedural method. The system developed can notify design modification to users when it is required, and enables users to share design models and analysis results. Designers can exchange opinions about common design matters by the conferencing function of the system. ID="A1" Correspondence and offprint requests to: S. H. Kong, Automatic Control Research Centre, Seoul National University, San 56–1, Shin-lim-dong, Kwanak-ku, Seoul 151–742, Korea. E-mail: silkysix@snu-.ac.kr     

金属切削毛刺数据库系统的设计

毛刺的产生和存在是金属切削加工中普遍存在的问题 ,它直接影响了工件的加工精度及质量。基于数据库和Java ,研究了金属切削毛刺数据库系统的设计 ,实现了切削毛刺数据的管理、切削毛刺类型与尺寸大小及加工参数的查询 ,进一步丰富和完善了金属切削毛刺的预报与控制理论。     

A system for the design and manufacture of feature-based parts through the Internet

The Internet has enabled the development of applications for supporting the design and manufacturing of industrial parts and products. Some actions have been performed by some research groups in different parts of the world aiming at conceiving product modeling systems based on the technology of features to allow information sharing, both for the activities related to product development and for manufacturing. This paper describes the implementation of the WebMachining system () developed in a context of e-Mfg and concurrent engineering, aimed at integrating CAD/CAPP/CAM for the remote manufacturing of feature-based cylindrical parts with symmetrical and asymmetrical features through the Internet, using an approach based on multi-agent systems. The information referring to the features is manipulated through a relational database management system. The graphic user interface (GUI) is implemented in Java and HTML. In this GUI, the user inputs the information on the design features that compose the part. Then these data are sent to the server. Since the part is cylindrical, the user models the part in two dimensions, and it can be visualized as three-dimensional through VRML. A database was implemented that stores the information on the product modeled by features, containing information associated with the form features, material features, tolerance features and technological features. These combined pieces of information allow the mapping of design features into machining features, which is fundamental for process planning. The database information is described in this article through the IDEF1X information model.     

微器件模板驱动的协同e-再设计工具的研究

概述了MEMS设计存在的不足，提出了在Web环境下进行微器件并行设计的框架结构。介绍了与微器件再设计相关的基本材料信息库的建立与完善，讨论了微器件模板的构成与模板库的索引，并建立了微器件在协同环境下的再设计流程以及相应的评价体系。系统通过集成信息资源、工程软件和数据库，实现Web-ASP结构下的MEMS设计中心，以提供在Internet环境下的微器件设计服务。     

基于J2EE模式的远程虚拟实验室的设计

论述了B／S架构下实现远程仿真实验的原理和技术;讨论了远程实验的必要性,重点论述了如何利用已经成熟的Java架构技术、发布技术、applet等技术仿真实验室;以大学电学实验为例,就如何设计基于B/S结构的网上实验室仿真进行了详细论述。     

基于ASP理念的WEB工艺设计系统的研究

依据ASP哲理,在保持CAPP系统原有逻辑功能的前提下,提出了一种基于Java的WEB-CAPP系统模式和软件编程模型,“游览器/服务器/数据库”3层结构则用来使能这种基础基础。同时,实现ASP管理前端的方法和WEB-CAPP的运行流程也被阐述,以便使此方法学能为促进电子商务在信息化制造领域的应用奠定基础。     

并行设计系统中的工艺咨询与决策模型

应用模糊理论的思想,提出一种实现计算机辅助工艺咨询的方法,该方法描述了零件功能与零件特征、零件特征与特征的加工方法、特征的加工方法与设备资源之间的映射关系,从而建立了工艺咨询的模型,解决了替代特征、替代加工方法和替代设备资源的咨询问题。     

Process Planning Support System for Green Manufacturing and its application

Owing to a lack of practical methods and software tools in the existing researches on green manufacturing (GM), process planning support system for green manufacturing (GMPPSS) was developed to deal with the problems in optimization of environment-benign process planning. The GMPPSS consisted mainly of three function modules and related model repositories including: selection of process elements, optimization of process courses, and evaluation of process projects for GM. The database of the GMPPSS was used to provide plentiful information on resources consumption and environmental impact in manufacturing processes, which consisted of process attribute database, inventory database, machine database, tool database, and the cutting fluid database. Raw materials, secondary material consumption, energy consumption, and environment impacts of process planning were optimized to improve the green attribute of process planning of parts with the supports of the databases and model repositories. The gear processing in the machining tool factory was presented to verify the system’s applicability. __________ Translated from Computer Integrated Manufacturing System, 2005, 11(7): 975–980 [译自: 计算机集成制造系统]     

自升式钻井平台设计专家系统的研究与应用

研究了自升式钻井平台设计知识库构建技术和专家系统推理分析技术,建立了自升式钻井平台实例库、规则库和综合数据库,编制了自动知识库获取程序,并将研发的设计专家系统应用于自升式平台的方案设计,提供的平台实例库、规则库、综合数据库以及推理分析程序为自升式钻井平台的方案设计提供了技术支持,可显著提高平台的设计效率,具有工程实用价值。     

产品配置管理系统中数据库关键技术的研究

目的为了有效地组织和管理好机械产品数据和信息,并且提高已有资源的利用率,研究产品配置系统的数据库设计无疑是一项重要的工作。方法提出一种从树状结构过渡到部分网状的产品配置数据结构,并引入到数据库设计中,在PDM的关系数据库管理系统中,实现对产品数据的面向对象表示。结果基于SmarTeam-PDM创建符合于产品配置系统的数据结构,构造一个适合用户需要的数据库。结论采用基于关系数据库的面向对象技术,实现产品配置系统数据库设计,提高了基于PDM的产品配置系统开放性和适应能力,为设计类似系统数据库提供了参考。     

Good things, small packages [microelectromechanical systems]

While semiconductor chip manufacturers still suffer from the recent downturn, the future looks a little brighter for microelectromechanical systems (MEMS). Also called microsystems and micromachines, these devices are found in many diverse applications, such as air bag sensors, ink-jet heads, medical sensors and telecommunication switches. MEMS can be manufactured from a variety of materials using a variety of processes in a variety of steps. For the foundry industries, it creates problems because each process can only be used for one customer. Because of their application-specific nature, MEMS devices often have to be designed using proprietary manufacturing processes that are specific to one manufacturing facility. In this paper, the author examined the surrounding issues in manufacturing MEMS as well as the probable solutions hypothesized by different experts.     

OA系统的设计与实现

参照软件工程的方法采用Java语言开发了OA系统。该系统基于J2EE平台,采用W ebLogic Server 7.0作为W eb Server和App lication Server,以JBu ilder 8作为主要开发环境,O rac le9 i作为Database Server,以JSP/Servlet结合JB技术作为主要的开发路线;主要功能模块有办公与事务处理、公文与信息交换、信息发布与管理、数据管理与分析、档案管理、电子邮件、系统管理等。它有机地将单位的内部办公与事务处理、门户信息网站管理和信息数据查询集成于一体。     

A WWW-Based Information Management System for Rapid and Integrated Mould Product Development

As efficient management of product information that covers the whole life cycle is critical to the enhancement of corporate competitiveness. This paper explores the design and development of a World Wide Web (WWW) based product development information management system for a cross-nation manufacturing corporation that is headed by a holding company in Christchurch, New Zealand. Since product data are often managed in a distributed computing environment, common object request broker architecture (CORBA) is employed to ensure the interoperability among distributed information objects. A STEP-based information framework is proposed to preserve the openness of the system. This WWW-based information management system is discussed in this paper, which includes two major components: 1. WWW-based product design and development distributed object-oriented databases and knowledge bases. 2. A WWW-based integrated system platform. Several sub-models are introduced, which include an object-oriented database structure, a WWW-based information management system, a WWW database tool, an information access tool, the incremental process-planning method, a cost-optimisation model and an integrated software platform for the integration of CAD, CAPP, CAM, and a WWW-based information management system.