基于DMAIC的配电箱壳体生产质量改进研究  

Research on Quality Improvement of Distribution Box Housing Production Based on DMAIC

作　　者：王海涛 余建国[1] Wang Haitao;Yu Jianguo(College of Mechanical and Electrical Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China)

机构地区：[1]江西理工大学机电工程学院,赣州341000

出　　处：《机电工程技术》2024年第1期136-139,共4页Mechanical & Electrical Engineering Technology

基　　金：江西省教育厅科学技术研究项目(GJJ210877)。

摘　　要：针对某公司M型号配电箱壳体生产良率低下的问题,使用六西格玛管理对生产过程实施DMAIC流程来进行项目改善,达到降低不良率的目的。在界定阶段,通过SPIOC流程图和Pareto图分析确定造成不良品过多的主要原因是焊接工序出现焊缝质量不良引起的,根据帕累托法则可知,只要降低焊缝质量的不良率,就能够短时间提升产品整体的良率;在测量阶段,验证了测量系统的重复性和再现性,确保数据的准确性并对焊接工序进行能力分析;在分析阶段,利用故障树分析(FTA)寻找造成焊缝质量不良的关键因素是焊机参数配置不当;在改进阶段,对焊机参数配置不当通过设计DOE正交实验确定最佳的参数配置;在控制阶段,提出改进方案并进行监控,按照最佳参数组合进行改进后,M型号配电箱壳体的良率从91.6%提升到97.9%,产品整体良率提高了6.3%,达到了质量改进的目的。To address the problem of low yield rate in the production of M-type distribution box shell of certain company,the DMAIC process is implemented using Six Sigma management for the production process to improve the project and achieve the purpose of reducing the defective rate.In the definition stage,the SPIOC flow chart and Pareto diagram analysis determined that the main cause of too many defective products is caused by poor weld quality in the welding process,and according to Pareto’s law,it is known that as long as the defective rate of weld quality is reduced,the overall yield of the product can be improved in a short period of time;in the measurement stage,the repeatability and reproducibility of the measurement system is verified to ensure the accuracy of the data and the welding.In the analysis stage,FTA is used to find the key factor causing the poor quality of the weld seam is the improper configuration of the welding machine parameters;in the improvement stage,the improper configuration of the welding machine parameters is determined by designing DOE orthogonal experiments to determine the best parameter configuration;in the control stage,the improvement plan is proposed and monitored,and after the improvement is carried out according to the best combination of parameters;after the improvement according to the best combination of parameters,the yield rate of M model distribution box shell increased from 91.6%to 97.9%,and the overall yield rate of the product increased by 6.3%,which achieved the purpose of quality improvement.

关 键 词：质量改进 DMAIC方法 SPIOC流程图 故障树分析 正交实验 

分 类 号：TG441.7[金属学及工艺—焊接]