Accuracy stability comprehensive evaluation of meta-action unit in CNC machine tools

作者：Jindong Xu, Yan Ran, Ke Tian · 发表于：Journal of Reliability Science and Engineering · 年份：2026 · DOI：10.1088/3050-2454/ae6594 · 被引用次数：1 · 研究领域：Advanced Measurement and Metrology Techniques、Manufacturing Process and Optimization、Engineering Technology and Methodologies

To address the shortcomings in the evaluation of precision stability of CNC machine tools, this paper takes the element action unit as the object, analyzes four types of fluctuation mechanisms such as wear, establishes four precision fluctuation models, and proposes accuracy fluctuation rate, accuracy variation rate, accuracy variation coefficient, accuracy stability coefficient (ASC), and comprehensive index accuracy stability index (ASI). In the worm gear rotation unit test, when the torque is 1–24 N m, ASC decreases from 7.88 to 3.15, and ASI increases from 0.0357 to 0.181; When the ASI exceeds the threshold of 0.1, abnormal accuracy is determined. This system effectively quantifies accuracy fluctuations and identifies anomalies, providing reference for accuracy stability evaluation.