六西格玛在军用飞机发动机总装质量控制中的应用

Six Sigma in Quality Control of Military Aircraft Engine Assembly

摘要:

国内某军用飞机主机厂C 发动机装机后存在间隙尺寸超差、装机一次合格率低的问题，为了解决该问题，引入六西格玛质量管理模式的DMAIC 方法对发动机装机流程进行研究。运用多元回归分析、机理分析等确定影响间隙尺寸的关键因子及其影响程度，采用线性拟合得出关键因子最优参数范围，并制定详细控制计划。通过对控制图进行分析，发现改善后的间隙尺寸处于工序稳定状态，发动机装机一次合格率由改善前的65.2% 提升至95%，表明基于六西格玛DMAIC 方法的质量控制对减小生产流程变异，提高生产效率有积极作用。

Abstract:

Six Sigma DMAIC method was introduced to analyze the engine installation process in order to solve the problem of low first time yield of engine clearance size in aircraft assembly plant C. Multiple regression analysis and other methods were used to determine the key factors affecting the clearance size and their influence degree, and the optimal parameter range was obtained by linear fitting, and a detailed control plan was made. The analysis results of the control chart show that the improved clearance size is in a stable state of the process, and the first time yield of engine installation has increased from 65.2% before the improvement to 95%. Conclusion: Quality control based on Six Sigma DMAIC method has a positive effect on reducing production process variation and improving production efficiency.