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Functional decomposition and reliability modeling technology study of CNC machine

机译：数控机床功能分解与可靠性建模技术研究

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摘要

Along with the social development, CNC machine tool is becoming more and more complex in its structure, while its reliability is becoming more and more important in the market. Since CNC machine tool functional reliability is more significant than its mechanical structural reliability, and the whole machine tool system's functional reliability is guaranteed by every meta-action's reliability, a new functional decomposition analysis method based on "Function-Motion-Action" (FMA) structure is put forward to support the reliability modeling of CNC machine tool. Firstly, the functional decomposition method is introduced, and the system decomposing process is obtained, then the unit functions and motion mechanisms of machine tool are analyzed. Secondly, the reliability evaluation model of machine tool based on meta-action is built, and the reliability evaluation models of every decomposing layer are listed. Finally, the gear grinding machine YK7236A is taken as an example to illustrate the validity and feasibility of this method.
机译：随着社会的发展，数控机床的结构越来越复杂，而其可靠性在市场上也越来越重要。由于数控机床的功能可靠性比机械结构的可靠性更重要，并且每个元动作的可靠性都保证了整个机床系统的功能可靠性，因此，一种基于“功能-动作-动作”（FMA）的新功能分解分析方法提出了支持数控机床可靠性建模的结构。首先介绍了功能分解方法，获得了系统分解过程，然后对机床的单元功能和运动机理进行了分析。其次，建立了基于元作用的机床可靠性评估模型，并列出了各分解层的可靠性评估模型。最后以齿轮磨床YK7236A为例，说明了该方法的有效性和可行性。

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