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<p>The machining accuracy of a five-axis machine tool(FAMT) is one of the important indicators for measuring its performance. Therefore, this paper proposes a universal sensitivity analysis method for machining errors to identify important geometric errors in FAMT. Firstly, based on multi-body systems and homogeneous transformation matrices, the volume error of FAMT was established. On this basis, based on the principle of side milling, a five axis machine tool machining error model is obtained. Then, the sensitivity coefficient of machining error is redefined within the four intervals of the S-shaped specimen, and the sensitivity values of each geometric error parameter are calculated to determine the key geometric error parameter items. Finally, to verify the effectiveness of the proposed method, a key geometric error compensation experiment for FAMT is conducted based on S-shaped specimens. The experimental results indicate that the proposed sensitivity analysis method is feasible and effective.</p>

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A sensitivity analysis method for machining errors of five axis machine tools based on S-shaped specimen intervals

  • 期刊论文

  • 发表日期：

    2025年12月5日

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  • Peitong Wang,
  • Ce Kong,
  • Jinwei Fan,
  • Ri Pan

摘要

The machining accuracy of a five-axis machine tool(FAMT) is one of the important indicators for measuring its performance. Therefore, this paper proposes a universal sensitivity analysis method for machining errors to identify important geometric errors in FAMT. Firstly, based on multi-body systems and homogeneous transformation matrices, the volume error of FAMT was established. On this basis, based on the principle of side milling, a five axis machine tool machining error model is obtained. Then, the sensitivity coefficient of machining error is redefined within the four intervals of the S-shaped specimen, and the sensitivity values of each geometric error parameter are calculated to determine the key geometric error parameter items. Finally, to verify the effectiveness of the proposed method, a key geometric error compensation experiment for FAMT is conducted based on S-shaped specimens. The experimental results indicate that the proposed sensitivity analysis method is feasible and effective.