Reliability coupling mechanism analyses of T-rotation-type CMA with frame deformation in CNC machine tools

Due to the complex structure and diverse functions of the CNC machine tool, there may be structural interactions between contemporaneous meta-action (CMA), which will lead to reliability coupling of the CMA. And these coupling relationships have a great influence on the reliability comprehensive evaluation of the CNC machine tool. Therefore, in order to analyze the reliability coupling mechanism of T-rotation-type CMA, based on the meta-action theory, this paper first introduces the corresponding concepts vis-a-vis CMA and analyzes the reliability coupling reasons of T-rotation-type CMA. Then, the bearing models, stiffness models, and dynamic models of gear 1 rotation meta-action unit under frame offset and frame deflection are established. What's more, the interval theory is utilized to construct the reliability coupling model of T-rotation-type CMA. Finally, by comparison and simulation analyses, the rationality and effectiveness of the proposed stiffness model and reliability model are verified, and the reliability coupling mechanism of T-rotation-type CMA under frame deformation is analyzed.

Automated summary

This paper analyzes the reliability coupling mechanism of T-rotation-type CMA based on meta-action theory. By establishing bearing models, stiffness models, and dynamic models, and using interval theory to construct the reliability coupling model, the reliability coupling mechanism of T-rotation-type CMA under frame deformation is verified and analyzed.