智能轮胎工厂的方案设计与关键技术

建立以数字化产品为核心的智能轮胎工厂,以提升轮胎企业产品研发能力,规范和优化产品开发流程,缩短产品研发周期,降低产品研发和维护成本。基于轮胎制造的工艺流程、智能制造模式进行总体布局设计,在轮胎制造关键工序,集成工业机器人、智能检测系统、智能物流系统以及智能生产系统,提升制造品质,从而实现工厂自动化智能生产。     

机床产品的快速报价

以机床产品为研究对象、用户性能要求为输入、产品价格为输出、制造系统内外部环境为约束条件、快速性及准确性为性能要求建立机床产品快速报价系统。综合运用了成本预估的直觉法、逻辑法、参数法、分析法，将机床产品的结构及成本进行分解和综合，建立机床性能与成本的关系模型，从而提出了一套完整的机床报价的原理和方法，并以卧式加工中心为例进行了说明。     

基于CAPP的气门制造成本管理系统的研究与应用

针对气门产品结构差异不大的特点,气门产品成本预算可以重用相似产品的已有成本数据。利用JAVA程序语言和SQLserver数据库开发出一种基于CAPP的气门制造成本管理系统,介绍了该系统的成本计算方法、系统业务流程,最后将该系统应用在企业的实际管理中,从而实现气门零件成本的快速计算,为企业工艺改进和快速报价提供可靠依据。     

Windows环境下医疗床的计算机检测与控制

本文介绍了 Ｗｉｎｄｏｗｓ环境下计算机检测方法在医疗康复床上的应用,同时探讨了利用 Ｖｉｓｕａｌ Ｂａｓｉｃ作为主程序开发语言,调用动态连接库进行硬件操作的数据采集方法,并且给出了利用ＶｉｓｕａｌＣ＋＋开发的本系统硬件Ｉ／Ｏ和Ａ／Ｄ转换的ＤＬＬ源程序。     

基于PROE的盾构机液压系统总成设计

作为制造型业企业,为提高竞争力,必须要求一个产品由最初的概念构想到制造完成,再到销售,所需的时间要尽量短,产品质量要好,制造成本要低,且满足用户个性化的需求。本产品是基于PRO/E参数化实体模型进行的装配总成设计。根据设备实际工况,模拟进行整个液压系统与盾构机主机设备的装配,从而使总成设计能够在各个阶段保持整体性和一致性。同时,为系统内部的装配布置提供了更大的灵活性和合理性。与传统的产品设计方法和生产模式相比,该设计有效避免了图纸与实际安装不符造成的变动,节省了制造工期和因修改而新增的材料,产生了较大的经济效益,并得到了用户的充分肯定,赢得了后续的产品销售合同。     

虚拟制造中的车削过程仿真系统研究

车削加工是应用最广泛的加工方法之一,对车削加工过程进行仿真具有重要的理论研究与实际应用价值。为此,基于C++ Builder软件进行了虚拟制造中的车削过程仿真系统研究。该系统可对工件进行仿真加工,并将加工过程显示在屏幕上,以发现制造过程中可能出现的问题,在产品实际生产之前就采取预防措施,从而达到产品一次性制造成功。降低了成本,缩短了产品开发周期;还可以对想象中的制造活动进行仿真,而不消耗现实的资源和能量。     

在VC环境下利用Pro/Toolkit对Pro／E刀具库进行二次开发

利用VC＋＋环境、Pro／Toolkit模块以及数据库Access对Pro／E刀具库进行二次开发。以建立车刀库为例，重点介绍二次开发中应用数据库的方法，实现数控加工中参数的自动输入。该方法同样适用于其他机械设计与制造，从而提高产品的设计与制造速度。     

产品和制造工程师们可以利用TestStand 2.0测试过程管理软件降低测试成本

产品和制造工程师们现在可以利用ＮａｔｉｏｎａｌＩｎｓｔｒｕｍｅｎｔｓ（简称美国ＮＩ公司）的ＴｅｓｔＳｔａｎｄ ２．０版的灵活、强大的并行测试功能减少测试时间,降低他们的产品测试成本。使用ＴｅｓｔＳｔａｎｄ ２．０版,用户可以自动并行测试多个单元,这样可以提高测试的效率,降低测试成本,增加产品的利润。 在世界范围内,领先的电子制造商们都在使用工业标准的ＴｅｓｔＳｔａｎｄ软件来降低费用,增加产出。Ｅｌｅｃｔｒｏｎｉｃ Ｂｕｓｉｎｅｓｓ杂志全球ＥＢ３００（１９９９）上所列出的前１０家电子公司中的８家,都在…     

面向用户性能需求的产品公差体系再设计方法

针对用户对产品性能需求不断变化,提出了一种面向用户性能需求的产品公差体系再设计方法,使生产企业充分利用原产品生产系统,不需重新构建制造系统和质量检验体系,只需对原系统做适当调整,快速响应市场变化,从而使产品既能满足用户需求而成本又最低。在分析产品公差体系的基础上,充分利用产品生产过程中各检验和试验环节记录下的历史数据,建立起基于支持向量非线性回归机的产品性能偏差与零部件质量特征偏差之间的关系模型。以产品制造成本最小为目标,以产品性能偏差满足用户需求、零部件质量特征偏差不超过其公差、零部件公差不超出其经济加工公差范围为约束,建立起面向产品用户性能需求的产品公差体系再设计优化模型,并以微电机为例进行其公差体系再设计,结果表明该方法行之有效,将产品公差设计从产品开发阶段扩展到产品全市场周期,为实现产品公差设计提供了新途径。     

基于特征的钻模板 CAD/CAM 系统的开发

分析机体零件、钻模板零件的特点,以并行工程为指导,利用ＩＤＥＦ０方法和面向对象的特征信息建模方法分别建立起系统的功能模型和全局的单一的数据模型,定义相应的基本特征、阵列特征、数控加工特征、特征数控段,使所建立的数据模型将设计特征和制造特征统一在同一特征定义中,从而为本ＣＡＤ／ＣＡＭ系统内部数据的无缝集成打下基础。最后,在ＡｕｔｏＣＡＤ１４上,用Ｃ＋＋语言实现了本系统。     

基于RE／CAD／CAE集成的注塑件协同制造系统研究

目前注塑产品开发趋于多样化,许多注塑产品的设计来源于既有的实物。本文提出了基于ＲＥ／ＣＡＤ／ＣＡＥ集成的协同制造系统,通过反向工程技术获取数据,ＣＡＤ用于实体造型,通过ＣＡＥ软件进行的塑件和注塑模分析。集成系统可以缩短产品的开发周期,降低设计成本,提高企业的市场竞争力。     

Java-based computer-aided process planning

This investigation addresses distributed environments for computer-aided process planning (CAPP) over a network. The Java 2 Enterprise Edition (J2EE) standard using Java is applied to implement cross-platform and distributed computing architecture, thus reducing the system loading during manufacturing process planning. The product-oriented standard, standard exchange of product (STEP), model data is applied to define a robust data model that associates product, shape, and feature definitions and provides the mechanisms for data exchange, sharing, and integration with other engineering systems, such as computer-aided design (CAD) and computer-aided manufacturing (CAM). STEP AP224 is engaged to define the machining features of machined products in the proposed CAPP system. The life cycle of a product from design to sale, and especially the period of manufacturing, can be greatly shortened; the cost of manufacturing can be reduced and the quality of the product can be improved using the proposed CAPP system.     

Manufacturing yield and cost estimation of a MEMS accelerometer based on statistical uncertainty analysis

Manufacturing yield maximization to minimize the production cost is one of the most important objectives of manufacturing. The manufacturing yield is the probability to manufacture products that satisfy multiple performance requirements. For a given set of product performance requirements, its manufacturing yield can be estimated based on the system parameter uncertainties including manufacturing tolerances, which are related to the production cost. We employ three performance indices for the design of a MEMS accelerometer, and the manufacturing yield and cost are estimated using statistical uncertainty analysis methods. The effects of the MEMS accelerometer parameter uncertainties on the manufacturing yield and cost are investigated.     

A framework of a concurrent process planning system for mold manufacturing

This paper presents a research on the development of a computer-based framework that supports concurrent mold manufacturing process planning. The practical goal of this research is three-fold: (1) to develop a systematic and concurrent mold manufacturing process planning model, (2) to develop a computer-based mold manufacturing process planning system based on the concurrent model, and (3) to develop knowledge bases to assist in concurrent type of mold manufacturing process planning that accommodates mold development concerns, as well as the requirements of the products. The approach of this work includes steps of (1) modeling and reengineering concurrent mold manufacturing process planning, (2) analysis of system functional requirements, (3) system framework design, and (4) system modeling and implementation. The results of this research will facilitate the rationalization and automation of the mold development process planning, thus improving the efficiency and quality, and also reducing the cost of molding product and process development.     

An Intelligent Knowledge-Based System for Product Cost Modelling

An intelligent knowledge-based system for product cost modellingis presented in this paper. The developed system has the capability of selecting a material, as well as machining processes and parameters based on a set of design and production parameters; and of estimating the product cost throughout the entire product development cycle including assembly cost. The proposed system is applied without the need for detailed design information, so that it can be used at an early design stage, and, consequently, redesign cost and longer lead time can be avoided. Hybrid knowledge representation techniques, such as production rules, frame and object oriented are employed to represent manufacturing knowledge. Fuzzy logic-based knowledge representation is applied to deal with uncertainty in the knowledge of cost model to generate reliable cost estimation. This paper deals with cost modelling of both a machining component and an injection moulding component, which is a process that gives high production rates, excellent quality and accuracy of products, and low manufacturing cost. Based on the analysis of the moulded product life cycle, a computer-based cost model was developed which integrated the relationship between cost factors, product development activities, and product geometry. The estimated cost included the costs of material, mould and processing. The system has been validated through a case study.     

基于产品基因的演化模型和选择过程研究

为缩短产品生命周期、降低企业制造成本,通过分析生物系统与产品系统的相似性,对生物个体与机械产品进行了类比,把产品基因引入到产品演化的过程中,提出了产品基因的演化模型,分析环境参数对产品演化的影响,提出了产品演化的选择法则并进行了实例应用。研究结果为企业有效建立起产品对市场的适应机制,快速准确地把握住产品的演化方向,提供了理论依据和实施方法。     

一种基于最优库存的非完全柔性制造系统的调度模型

对象是只有一台不可靠（ｆａｉｌｕｒｅ－ｐｒｏｎｅ）机器的非完全柔性制造系统,该系统能生产多种产品,但在同一时刻只能生产一种产品,并且当由生产一种产品向生产另一种产品切换时,引入了ｓｅｔｕｐ时间及其成本。决策变量是ｓｅｔｕｐ开始时间和生产计划。本文基于非完全柔性制造系统的特点,考虑正常生产情况下,建立了考虑ｓｅｔｕｐ时间及成本的流率控制最优化模型。并给出了有限时域上寻优的动态规划算法的充分必要条件。     

面向项目制造的单品成本管理方法研究

随着现在项目制造企业的产品的间接费用占的比例的增大,传统成本算法越来越不适用.为了适应这些变化,对项目制造企业的产品成本管理方法进行了研究.在分析了项目制造产品的特点和作业成本法原理的基础上,提出了面向项目制造的单品作业成本法,并对其原理和计算模型进行了探讨,最后通过实例来验证.实例结果表明,此单品成本管理方法的产品核算数据比传统成本管理方法的数据更准确,更接近产品的实际成本.因此,面向项目制造的单品作业成本法值得在项目制造企业中推广使用.     

Direct value added and economic weight factors in economic analysis of CIM

Throughout manufacturing history, management has searched for tools to help it set product prices accurately. Traditionally, manufacturing managers have analysed efficiency by cost makeup with the basic elements: materials, labour, overheads. Overhead costs are allocated to units of production based on a theorical correlation with labour costs. With automation, direct labour has come to be only 1 to 20% of the total manufactured costs of products. The CIM infrastructure must incorporate a wide range of management facilities. It is now time to focus on an integrative approach which embraces design, planning, process and product costing. With the direct value approach we describe a concept which gives pertinent information to adapt strategy speedily for a better profitability. In addition an economic weighting coefficient for the analysis of job contribution in the creation of added value, it is possible to control product pricing. In this way, economic information can be an element of the product and process database and thus build up an operational decision support system by means of sharing common information.     

基于DFM三维振动强化抛光装置优化设计

利用并行工程下，面向可制造的产品设计方法，优化设计无导轨支承三维振动强化抛光装置。设计中实现及时提供反馈信息、改进不合理设计，从而达到缩短三维振动强化抛光装置开发周期、降低成本及提高产品设计质量的目的。