航空零件制造质量控制方法研究

Study on the quality control method for aircraft part manufacturing processes

针对航空零件制造的质量控制问题,提出了一种基于制造过程工程模型的集成质量控制方法,给出了其功能体系结构和实现步骤。该方法以航空零件制造过程的工程物理模型为基础,综合运用了状态空间建模、统计估计和自动控制等理论和技术。详细研究了该方法中物理模型的建立、误差源的识别、过程的调整、全过程能力的计算、选配度的计算等制造质量控制技术的实现方法,并给出了其软件实现模式,为实现航空零件的低成本、高精度制造质量控制提供了一个新的方法。

To solve the problems concerning the manufacturing process quality control of aircraft parts, a integration quality control method based on process engineering model was proposed, corresponding framework functional and implementation steps all put forward. This method based on the engineering physical mod- el of aircraft parts manufacturing processes, integrated several enabling technologies such as state space modeling, statistical estimation method, automatic control theory. Furthermore, the realization method of some key quality prediction and control enabling technologies were studied in detail, including establis- hing the process physics model, diagnosing and identifying fault sources, adjusting the machining process, estimating overall process capability index, calculating matchable degree. They were used under the software system prototype to perform the functions of this quality control method and the feasibility of this proposed method was verified preliminarily with the developed software prototype system. This method provided a new way to realize the low cost, high precision manufacturing process quality control for aircraft parts.