共查询到18条相似文献,搜索用时 203 毫秒
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为了保证产品族零件工时定额制定的通用性和高效性, 提出了以零件制造特征作为工时载体的工时定额制定新方法。该方法通过建立零件的制造特征模型, 研究了基于零件制造特征的零件相似性判定, 根据零件相似性判定划分了零件组, 对每个零件组内所有零件的工时及其影响因素进行了描述, 并构建了零件组相应的工时描述平台。通过神经网络技术的运用建立了零件的工时神经网络模型, 并结合MATLAB软件对零件工时进行了估算, 实现了产品族零件工时定额的快速制定。最后, 通过案例阐述了新方法的具体实现过程。 相似文献
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模块化加工系统是将定制产品的制造问题通过产品重组和过程重组转化为或部分转化为批量制造问题,即提供给用户的是全新的、定制的个性化产品,而实际产品则主要由标准的模块组成。本文介绍了GE RX3i在模块化加工站中的设计。 相似文献
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工时定额是大规模定制生产模式下企业确定产品交货期和提高顾客满意度的重要参考依据。为更好地支持大规模定制生产的企业工时定额的制定,提出一种大规模定制环境下基于加工特征的零件工时定额的制定方法。在此方法中,运用面向对象方法将零件组内的加工特征进行分类、编码,建立加工特征信息模型,以便于零件加工特征的检索;采用神经网络技术,结合MATLAB软件针对编码系统中每一个最底层的加工特征建立对应的工时模型;根据零件加工特征的编码检索各个加工特征的工时模型,估算每个加工特征的加工工时,从而得到整个零件的工时定额。通过与传统的工时定额方法对比,验证了该方法的准确性和快速性。 相似文献
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为了解决大规模定制生产环境下定制零件工时定额制定存在的问题,提出一种基于零件定制程度的工时定额方法。此方法首先分析了影响零件工时的主要特征,采用神经网络技术得出各主要特征的权重;然后运用模糊综合评判法计算基于零件主要特征的零件定制程度;最后通过事例推理技术(case-based reasoning,CBR)检索相似零件,根据相似零件的定制程度与工时信息,运用MATLAB软件建立零件工时的数学模型,计算出定制零件的工时。以某企业模具的平面安装面的加工时间计算为例对该方法进行验证,结果证明该方法具有较高的准确性和可行性。 相似文献
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基于现场可编程(FPGA)技术和硬件描述语言VHDL的设计和综合,通过自顶向下的设计方法和模块化设计思想,在OuartusⅡ环境下能定制、仿真、下载验证和实现CPU功能。通过VHDL语言定制了运算器ALU模块和调用宏模块定制了RAM模块,介绍了基于FPGA的CPU设计方法,并通过初始化程序进行验证,实现了基于FPGA的CPU功能,表明基于FPGA技术在设计CPU核和大规模集成电路设计方面可根据实际情况定制,具有灵活性、可靠性和可扩展性。 相似文献
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面对某一特定的生产任务时,企业如何在时间、成本、质量、服务(TCQS)方面快速协调不同加工任务,快速准备工装满足工装需求已经成为我国航天制造企业大规模定制生产中不容忽视的关键问题之一。从工装模块化设计的方法出发,提出了适合工装模块划分和编码的原则,并以夹具为例说明模块编码的体系结构,为企业在工装快速准备方面提供了方向和思路。 相似文献
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以模块化设计为基础,以变型设计为研究对象,将成本企划思想与模块化产品规划融为一体,提出了以基型模块成本为标准成本.通过变型模块与基型模块的差异估算变型模块成本的思路和方法.以此为基础,研究了模块化成本控制的主要内容.首先将需求转为产品特征,确定需求产品的结构;然后针对需求产品的设计成本,构建了成本估算模型,分析了影响成本的主要因素及其相互关系;最后建立了以模块为对象的成本控制模型.并验证了模型的有效性. 相似文献
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Mass Customisation Manufacturing (MCM) attempts to deliver efficient manufacturing outputs, initiated by unique design input into a configurable product platform. In this paper, customers’ selection behaviour in terms of product configuration is characterised and metrics thereof used in presenting a new manufacturing flow control method. The novel setup scheduling and flow control method, termed Biased Decision Feedback (BDF), is tested in a simulation study of a custom fly fishing reel manufacturing facility. Also, BDF is shown to posses an operating point when the statistical behaviour of customers’ selections is stable. 相似文献
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机器视觉系统通信数据量大、实时性要求高且依赖PC机,针对这些特点本文设计并实现了一种嵌入式操作终端通信模块。该模块采用三星2440作为主芯片,双网卡硬件结构,运行WinCE5.0操作系统,使用Modbus/TCP和自定义协议,通过增加自定义功能码和文件传输规范,使基于客户端/服务器模式的操作终端与智能相机能够一次通信大数据量的文件,很好地满足了视觉系统通信需求。测试表明:该通信模块正确读取和显示相机的配置信息和检测过程中输出的实时运行参数,接收一帧480*360灰度图像平均耗时82ms,具有良好的实时性和可靠性。该模块已成功应用于工业现场,取得了良好的效果。 相似文献
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Open product architecture is a key enabler for product personalization, as it allows the integration of personalized modules in a product architecture to satisfy individual customer needs and preference. A critical challenge for integrating personalized modules into a product architecture is determining the optimal assembly architecture when considering market expectations and manufacturing constraints. In this paper, an optimization method is proposed for determining the personalized product design architecture that incorporates individual customer preferences. First, a decision hierarchy is presented to describe the integrated design decisions of the product architecture, including product variety determination, module variant selection, and personalized module configuration. Next, a profit model is formulated as an overall performance metric that incorporates customer preferences and manufacturing cost. The systematic patterns and randomness of diverse customer preferences are modeled by combining conjoint analysis and market segmentation with a multivariate normal mixture model. Individual customer product utilities in the target market and their product purchase intent probability are estimated through Monte-Carlo simulation, which is incorporated into the profit calculation. Manufacturing limitations on processes and materials are included as they influence manufacturer’s planning on candidate module variants and production strategies of personalized modules. These models are used to determine a product family architecture that maximizes profit by optimally determining its offering of product variants, module combinations, and personalized module configuration through a genetic algorithm. The proposed method is demonstrated by a personalized bicycle architecture design example. 相似文献
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Measuring the impact of Lean tools on the cost–time investment of a product using cost–time profiles
Traditional costing systems consider the accumulation of costs, but not their timing. Value stream mapping presents a good picture of the time consumed and operations performed for the production of a product within a manufacturing facility, but it does not track the accumulation of costs. The cost–time profile (CTP) is a tool that follows the accumulation of cost in the manufacturing of a product through time; and it finds the cost–time investment (CTI), which is an indicator of the use of resources in the manufacturing of a product through quantities and timing. In this paper, the expected impact of Lean implementations on the CTP and CTI is discussed. The CTP is proposed as a useful tool for the evaluation of the improvements achieved by the implementation of Lean tools and techniques. 相似文献