【作者】 张慧；

【导师】 张敏； 宋泽海；

【作者基本信息】 天津大学 ， 工程管理， 2021， 硕士

【摘要】 在经济全球化的大背景下,企业想要在市场竞争中占有一席之地,不仅要注重成本控制,更要在产品质量上具有相当的竞争力。S公司一直秉持“精益求精、追求卓越”的品质原则,维护着在行业内的优势地位。但在近些年,因公司生产的低速轴部件原材料状态的变化导致出现了部件报废的质量问题,甚至在交付客户的整机产品中因低速轴部件出现断裂而导致客户公司停产的严重后果,S公司决心深挖低速轴部件的问题根源并进行研究改进。本文将被投诉的故障产品及S公司厂内部分报废产品进行情况总结,开展质量改进工作。本研究以DMAIC流程为整体框架,首先使用SIPOC和SMART原则确定研究范围,再使用5M1E、鱼骨图、流程图等工具挖掘质量影响因素,同时使用测量系统分析(MSA)保证后续调查中检测系统的可靠。接着,针对生产记录和问题产品的检测数据进行整理分析,找到导致低速轴部件质量问题的关键影响因素,并结合精益思想改进加工流程,最终解决S公司低速轴部件的质量问题。本文通过研究改进了低速轴部件的工艺流程,帮助S公司从根本上解决了该部件的质量问题,并通过过程优化缩短了加工周期,最终达到改善质量、提升效率、降低成本的效果。同时,本次研究也为精益六西格玛管理引入减速机行业的生产提供了参考样例和应用实践。更多还原

【Abstract】 As the world marches unavoidably toward globalization,if the enterprises want to have their places in the market,controlling cost is not the only key point they shall focus on,competitive advantage in product quality is particular important.“Keep improving,strive for excellence” is the principle of quality control that always be adhered to in company S,and it always helps to maintain a strong position in competition of reducer industry.However,recently,the delivered product occurred malfunction resulting from the change in the material condition,which even caused such serious consequences that client company stopped production.Hence,company S determined to find the root of this problem and research the improvement program.This study of quality improvement is carried out by collecting the information of the defective product in client company and the faulty items in production process in company S.Based on the DMAIC framework,the scope of this thesis is defined by SIPOC and SMART principle,and the factors which could influence quality is excavated by 5M1 E,fishbone diagram and flow chart.In order to ensuring the reliability of data,MSA is used to verify the measure system of hardness survey and dimension test.Then,for finding the key influence factors,the production records and the measured data of the defective shafts are collected and analyzed.Finally,combined with lean management,the quality problem of low speed shafts in company S is solved.By studying the production process of company S and improving the quality of low speed shafts,this thesis helps company S fundamentally solve the quality problem of this part,and shortens the processing cycle through process optimization,and finally achieves the effect of improving quality,enhancing efficiency and reducing cost.In the meanwhile,this thesis can provide a reference for the application of Lean Six Sigma management in reducer industry.更多还原