【作者】 段炼；

【导师】 易树平；

【作者基本信息】 重庆大学 ， 机械制造及其自动化， 2011， 硕士

【摘要】 随着我国航空事业的快速发展,我国航空标准件制造企业发展面临着新的机遇和挑战,如何提高我国航空标准件制造企业的管理水平和竞争力,成为了一个重要课题。在市场竞争日趋激烈,客户对产品多样化和个性化要求日益增加的环境里,产品更新速度不断地加快,使航空标准件制造企业的生产逐渐呈现出了一些新特点,并面临着一些新问题。我国航空标准件制造企业,在不断发展过程中生产系统逐渐形成了批次管理下的多品种跨批量生产环境。一方面,由于行业的特殊性,航空标准件对材质、性能和质量等方面,有着非常高的要求,必须在同炉材料同批制造的批次管理原则下,进行产品的生产组织和管理。航空标准件制造企业实行的这种批次管理,对原材料,生产设备和作业人员都有严格要求和限制。产品原材料必须是同炉号器材,按同一生产批次投入生产,同时同一批次产品,还必须使用同一套生产设备,同一组作业人员进行生产,以确保同批次产品的每个零件,都具有完全相同的材质、性能、质量和使用寿命。另一方面,航空产品在研制期以中小批量采购标准件,而成熟定型产品,是以大批量进行采购,使航空标准件制造企业在同一个生产计划期内,同时出现中小批量和大批量的生产,呈现出多品种跨批量生产的特点。在这样的生产环境里,航空标准件制造企业生产组织和管理变得十分复杂,生产系统运行效率难以提高。为此,不少航空标准件制造企业引进单元生产方式,以提高生产系统对市场需求变化的适应力和生产效率,从而缩短生产周期和交货期。本文对航空标准件制造企业的生产系统进行了研究,分析了批次管理下多品种跨批量制造企业的生产现状;针对这一类型企业在品种和批量频繁变化的条件下,研究如何在有限的制造资源下构建合适的生产单元,同时通过引入信息熵,构建了产品加工工艺的重构性评价指标,并提出了一种基于工序重构的生产单元规划模型,以生产单元系统拥有较高的产品工艺可重构性为目标,建立了适合零件族和设备组并行构建的单元构建优化数学模型。其次,通过对批次管理下多品种跨批量制造企业的生产单元案例进行研究,构建了产品加工的生产单元,同时应用Arena仿真软件,进行仿真模型的构建和仿真,并根据仿真的结果,提出了相应的优化措施。更多还原

【Abstract】 With the rapid development of China’s aircraft industry,the manufacturing enterprise of aviation standard parts are confronied with both opportunity and challenge. It has become a critical topic to improve management level and competitiveness of our manufacturing enterprise of aviation standard parts. The market competition is becoming fiercer and fiercer,and the individuality and diversity of consumers’demand is increasing,which induce manufacturers to speed up the renovation. And the production of the manufacturing enterprise of aviation standard parts is facing more new features and problems.For the continuous development of manufacturing enterprise of aviation standard parts, the production system is facing the multi-categories and cross-batch manufacturing environment within batch management. Firstly, because of the aircraft industry’s special characteristics, there are very high requirements for aviation standard parts’performance and quality, and the production’organization and management must be based on the principle of synchronous furnace and common-batch manufacturing of batch management. The batch management of manufacturing enterprise of aviation standard parts has strict demands and restrictions. Because the aviation standard parts should keep the same materials, performance, quality and service life, the product’s producing must be in common-batch with synchronous furnace original material, the same production equipments, and even the same group of workers.Secondly, aviation standard parts purchased in medium or small batch for the development aviation production. And the case-hardened product is purchased in mass batch. So manufacturing enterprise of aviation standard parts’is facing the feature of multi-item and cross-batch production, with medium, small and mass batch. The production’s organization and management of the manufacturing enterprise of aviation standard parts is very complex in such manuf-acturing environment. And it is hard to improve the productive efficiency of the produc-tion system. So more and more enterprises Introduce cellular production to improve the market-changing adaptive capacity, the productive efficiency of production system, and shorten the time of production cycle and due dates.Based on summarizing the research and the development situation at home and abroad of cellular manufacturing, the process of multi-categories and cross-batch manufacturing enterprise’s bringing out, the batch management and the current production situation are studied and analyzed in this paper. In connection with the condition of multi-categories and cross-batch produce, the manufacturing cell formation in manufacturing with limited manufacturing resources. And the information entropy was used to constructing evaluating indexes of reconfigurability of process of works. Based on the indexes, a manufacturing cell formation model is proposed. Secondly, a case of manufacturing cell formation in a multi-categories and cross-batch production enterprise, was studied by applying the model and Arena simulation software, and the improvement and optimization methods were proposed to enhance the production efficient of the workshop production system.更多还原