六西格玛在D公司发动机缸盖质量改进中的应用研究

发布时间：2018-01-12 14:26

本文关键词：六西格玛在D公司发动机缸盖质量改进中的应用研究　出处：《天津大学》2013年硕士论文　论文类型：学位论文

【摘要】：在市场竞争日益激烈的大环境下，企业如何脱颖而出以及获得更大的收益，这是管理者们一直在思考和实践的方向。而六西格玛则为企业的发展提供了先进的管理模式和改进方法。本文首先介绍了D公司在中国的发动机工厂T，以T工程的的现状为出发点，以六西格玛的基本概念和实用性为基础，介绍了T工厂的六西格玛的实施现状并分析了课题的研究意义，并着重对DMAIC改进流程及Minitab数据分析工具展开了探讨。概述了T工厂的企业背景文化、公司的产品结构、未来的发展规划等，并简单介绍了发动机的基础知识。第四章着重分析了运用DMAIC方法对T工厂发动机缸盖质量问题改进的具体过程和步骤。通过对客户的反馈和厂内相关指标的分析，缸盖水套堵泄漏这一质量问题是影响发动机缸盖质量的首要因素。项目组成员使用鱼骨图、头脑风暴法、因果关系矩阵、潜在失效模式及后果分析等方法进行分析归纳，筛选出8个输入变量。然后用Minitab软件进行了测量系统分析和过程能力分析。在分析阶段，通过对相关数据进行分析来确定出4项关键影响因素。在这个阶段用到了假设检验、箱线图、多变量图、方差分析等工具技术。随后对着4项影响因素实施了改进措施并验证了其有效性。措施实施后，，小组又对FMEA、控制计划、维修保养计划等相关的质量文件进行了更新。经过项目组成员共同的努力，项目成功达到并超过了预期的目标：水套堵的PPM值从2011年11月的5155降至2012年4月的1888，之后也保持在1400左右的水平；生产线FPY从91.29%提高至96.13%并保持稳定状态；为公司节省了151540人民币的成本，返工时长也降至1380分钟。整个项目的成功充分验证了DMAIC方法对流程的改善和质量提升的重大意义。
[Abstract]:In the increasingly fierce market competition environment, how enterprises stand out and get more profits. This is the direction for managers to think and practice all the time, while six Sigma provides advanced management mode and improvement methods for the development of enterprises. This paper first introduces the engine factory of D Company in China, which is based on the basic concept and practicability of six Sigma. The implementation status of six Sigma in T factory is introduced and the significance of the research is analyzed. The paper mainly discusses the DMAIC improvement process and Minitab data analysis tools, and summarizes the background culture of T factory, the product structure of the company, the future development plan and so on. The basic knowledge of engine is briefly introduced. Chapter 4th focuses on the analysis of the concrete process and steps of improving engine cylinder head quality in T factory by using DMAIC method. Through the feedback from customers and the analysis of related indexes in the plant. The quality problem of cylinder head water jacket leakage is the primary factor affecting engine cylinder head quality. The project team members use fish bone map, brainstorming method and causality matrix. The potential failure mode and consequence analysis were analyzed and concluded, and 8 input variables were selected. Then, the measurement system analysis and process capability analysis were carried out with Minitab software. Through the analysis of the relevant data to determine the four key factors. In this stage, we use hypothesis test, box diagram, multivariate diagram. Analysis of variance and other tool techniques. 4 factors were subsequently implemented to improve and verify its effectiveness. After the implementation of the measures, the team on the FMEA, the control plan. Maintenance plan and other related quality documents have been updated. Through the joint efforts of the project team members. The project successfully achieved and exceeded the expected goal: the PPM value of water jacket plug decreased from 5155 in November 2011 to 1888 on April 2012, and then remained at about 1, 400 level; The FPY of production line was raised from 91.29% to 96.13% and kept stable. The company saved 151540 RMB in cost and the rework time was reduced to 1, 380 minutes. The success of the whole project fully demonstrated the significance of the DMAIC method in improving the process and improving the quality.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：F273;F426.4

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