【作者】 李玉玲；

【导师】 张根保；

【作者基本信息】 重庆大学 ， 机械制造及其自动化， 2008， 硕士

【摘要】 质量管理与控制是企业实现预防原则、保持生产稳定的重要手段。只有工序质量满足制造要求,才能实现产品开发设计所设定的质量目标、生产出满足用户期望的优质产品。因此,在先进制造模式下,如何有效进行工序质量控制已成为当前产品质量控制领域的研究热点。本文在归纳总结工序质量控制及过程能力指数相关理论的基础上,对基于过程能力指数的工序质量控制及抽样检验方案进行了研究,主要研究内容包括以下几个方面:①工序质量控制的相关理论及控制系统研究。在回顾质量管理、工序质量和过程能力指数等基本理论与发展历程的基础上,对工序质量分析方法进行了探讨,建立了工序质量控制系统体系结构。②基于过程能力指数的工序质量控制研究。在归纳分析几种基本过程能力指数的基础上,提出动态过程能力指数和动态修正过程能力指数、多工序过程能力指数等的概念,分析了动态过程能力指数与制造质量(合格率及废品率)之间的关系,并从质量损失的角度探讨了基于多工序过程能力指数的质量控制方法。分析了基于5M1E的过程能力指数改进关键因素,为从源头探究将过程能力指数持续维持在经济、合理范围奠定了基础。③基于过程能力指数的抽样检验方案研究。考虑到过程能力指数在工序质量评价时使用的有效性和广泛性,建立了基于过程能力指数的抽样方案,研究了过程能力指数与抽样样本容量和不合格品率之间的关系,提出了在某一批量下,抽样样本容量和合格判定数的确定方法,并通过实例研究表明,该检验方法能够有效剔除不合格品、实现样本容量和合格判定数的正确确定。更多还原

【Abstract】 Quality management and control are important means to realize the preventive principle and keep the stable production for enterprise. Only the process quality satisfies the manufacture demands, the quality aims of enactment during the products development and design can be realized and the high quality products satisfied the user desired can be produced. So, in Advanced Manufacturing condition, how to improve efficiently process quality has been the research focus in the current product quality control field.In this paper, based on the correlation theories of the process quality control and the process capability indices induction and summarization, the process quality control and the sampling inspection plan are further studied based on the process capability indices. The mainly study is concerned about the following aspects:①The correlation theories of the process quality control and control system are investigated. Biased on review the theories of quality control, the process quality control and the process capability indiceses and their development course, the methods of process quality analysis are discussed and the frame system of process quality control is founded.②The process quality control based on the process capability indiceses is studied. Based on the basic process capability indiceses induction, the concepts of dynamic process capability indices, dynamic modify process capability indices and the multistage process capability indices are proposed. The relationship between dynamic process capability indices and manufacturing quality is analyzed. The method of quality control based on multistage process capability indices from quality loss is discussed.③The products sampling inspection plan based on the process capability indiceses is researched. In view of prevent function of the process quality from the process capability indiceses, the products sampling inspection plan is established. The connections of the process capability indiceses with the sampling samples content and reject rate are studied. The in one batch is calculated. With the example investigate, the result shows that the inspection method can eliminate the reject and realize the sampling samples content and the number of eligibility products confirmation correctly.更多还原