数控机床可靠性信息系统信息建模

可靠性信息建模是开发数控机床可靠性信息系统的关键.提出了一种数控机床可靠性信息建模的新方法———功能元法,定义了功能元法的基本概念和基本理论,得出了基于功能元法的数控机床功能信息抽象方法和故障模式及原因等可靠性信息抽象方法,应用于某国产数控车床故障模式与影响分析(FMEA)的信息建模.结果表明:该方法适用于对不同种类数控机床进行不同深度可靠性分析的信息建模.以此方法开发的数控机床信息系统已应用于国产数控车床、数控冲床、数控轴承磨床、线切割机床等的可靠性增长,数控机床的平均无故障时间显著提高.

Study on reliability information system modeling of CNC machine tools

Considering reliability information modeling as a key technology in CNC(Computerized Numerical Control) machine tool reliability information system, the function element method, a kind of new CNC machine tool reliability information modeling method, is proposed. Basic conception and theory on function element method is defined. And information abstraction methods, such as CNC machine tool function method based on function element method and reliability method related to failure model and cause, are obtained. And FEMA information model applied in a certain home-made CNC lathe machine is introduced as well. The results indicate that this method are suitable for the modeling of various kinds of CNC machine tools. CNC machine information system based on this method has been applied to improve reliability of home-made CNC lathe, CNC punch, CNC bearing grinding machine, linear cutting machine, and etc. Mean Time Between Failure (MTBF) of a certain home-made CNC lathe is increased remarkably.