虚拟企业下制造单元的构建与资源选择研究

发布时间：2018-06-21 12:03

本文选题：虚拟企业 + 资源选择　；参考：《江苏科技大学》2014年硕士论文

【摘要】：敏捷制造被认为是制造模式发展的主要趋势之一，虚拟企业作为敏捷制造的具体组织形式，以其快速响应市场，满足客户需求的特性被越来越多的研究和应用。而传统的虚拟企业多以企业单元作为基本的研究对象，难以在市场需求发生变化时做出快速有效的反应，缺乏必要的柔性和灵活性。而单元化制造快速响应市场需求，灵活组织生产计划的特点与虚拟企业的组建理念不谋而合，本文将单元化的制造方式引入到虚拟企业的构建和生产运作上，在虚拟企业中推行单元化的制造方式，既有效的提高了虚拟企业的敏捷性，也拓展了传统单元化生产的应用空间，具有一定的积极意义和研究价值。根据虚拟企业资源分布和加工任务的特点，构建虚拟企业单元化的概念模型。按照一定的原则和虚拟企业加工任务的工艺流程，对任务加以分解，形成与中间任务对应的逻辑制造单元LMU，各LMU的组合形成逻辑加工路线LMP。每一个LMU对应多个可以完成加工任务的敏捷制造单元AMU，AMU与LMU为多映射关系，即一个逻辑制造单元LMU可由多个敏捷制造单元AMU完成，同样的，每一AMU可能具备多个LMU所描述的加工能力。对不同制造单元的选择和有序排列，形成可执行的加工路线EMP,通过对诸如质量、时间和成本等优化目标考量，寻求最优的EMP。与虚拟企业一样，虚拟企业单元化制造系统随着加工任务的出现而形成，随着任务的完成而消失。本文主要从资源的选择以及动态制造单元的重构两个方面对虚拟企业单元化制造系统进行分析和研究。在基于制造单元的虚拟企业资源选择过程中，着重考虑时间、成本和质量等指标对资源选择的影响，并据此构建了资源的优化选择模型，以期构建最优的敏捷加工路线。动态制造单元作为虚拟企业单元化制造系统的基本单位和执行层，其敏捷性和柔性对整个系统至关重要，需要根据任务的变化进行不断地重构。动态制造单元的重构在本质上是对资源的选择和聚类，通过对资源的选择确定待加工工件在不同加工路径上的加工数量，然后利用成组技术中常用的金氏聚类算法对设备工件矩阵进行成组聚类，，完成对动态制造单元的重构。最后，结合某模具企业的实际情况，通过对企业存在的问题加以分析，完成了对企业的加工流程和制造单元的重构，并结合综合评价模型对重构前后的效果加以评价，说明重构的有效性和必要性。
[Abstract]:Agile manufacturing is considered to be one of the main trends of manufacturing pattern development. As a specific organization of agile manufacturing, virtual enterprise has been studied and applied more and more for its rapid response to the market and to meet the needs of customers. But the traditional virtual enterprise takes the enterprise unit as the basic research object, so it is difficult to respond quickly and effectively when the market demand changes, and lacks the necessary flexibility and flexibility. The characteristics of flexible organization of production planning coincide with the concept of virtual enterprise. This paper introduces the method of unit manufacturing to the construction and production operation of virtual enterprise. The implementation of the unit manufacturing method in the virtual enterprise not only improves the agility of the virtual enterprise effectively, but also expands the application space of the traditional unit production. It has certain positive significance and research value. According to the distribution of virtual enterprise resources and the characteristics of processing tasks, the concept model of virtual enterprise unit is constructed. According to certain principles and the technological process of virtual enterprise processing task, the task is decomposed, and the logical manufacturing unit LMUU corresponding to the intermediate task is formed, and the combination of each LMU forms the logical processing route LMP. Each LMU corresponds to multiple Agile Manufacturing Units (AMUUMUs) that can accomplish processing tasks, and LMU has a multi-mapping relationship with LMU, that is, a logical manufacturing unit (LMU) can be accomplished by multiple Agile Manufacturing Units (AMPs) AMUs. Each AMU may have the processing capabilities described by multiple LMUs. The EMPs of different manufacturing units are selected and ordered to form an executable processing route, and the optimal EMPs are sought through the consideration of optimization objectives such as quality, time and cost. Like the virtual enterprise, the unit manufacturing system of the virtual enterprise is formed with the appearance of the processing task and disappears with the completion of the task. In this paper, we analyze and study the unit manufacturing system of virtual enterprise from two aspects: the choice of resources and the reconfiguration of dynamic manufacturing cells. In the process of resource selection of virtual enterprise based on manufacturing cell, the influence of time, cost and quality on resource selection is considered, and the optimal selection model of resources is constructed in order to construct the optimal agile machining route. As the basic unit and executive layer of the virtual enterprise unit manufacturing system, the agility and flexibility of the dynamic manufacturing cell is very important to the whole system, so it needs to be reconfigurable continuously according to the change of the task. The reconfiguration of dynamic manufacturing cells is essentially the selection and clustering of resources. The number of workpieces to be processed in different processing paths is determined by the selection of resources. Then, the Kim's clustering algorithm is used to cluster the workpiece matrix of the equipment, and the dynamic manufacturing unit is reconstructed. Finally, according to the actual situation of a mould enterprise, through the analysis of the problems existing in the enterprise, the reconfiguration of the processing process and manufacturing unit of the enterprise is completed, and the effect before and after the reconfiguration is evaluated by the comprehensive evaluation model. The effectiveness and necessity of reconstruction are illustrated.
【学位授予单位】：江苏科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：F426.4;F274

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