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<p>To address the issues such as tool wear, overheating failure, and vibration uniformity in traditional ultrasonic elliptical vibration cutting, a dual-bending ultrasonic elliptical vibration cutting tool is developed using cobalt ferrite giant magnetostrictive materials. This tool achieves large strain, high power, and stable elliptical trajectory output. First, bulk cobalt ferrite giant magnetostrictive material is prepared, and its static magnetostrictive properties are analyzed to clarify the mechanism for improving the performance of the vibration cutting. Next, a dual-bending magnetostrictive elliptical vibration cutting tool is designed based on the Timoshenko beam theory, and finite element simulations are employed to obtain the optimal mode and output trajectory. Then, by designing the static bias magnetic field and the driving magnetic field, the frequency-multiplying effect of the vibration cutting tool is eliminated. Test results indicate that under resonant driving at 45.43&#xa0;kHz, the temperature increase remains below 60&#xa0;°C, the tool tip output amplitude reaches 5&#xa0;μm, and different elliptical trajectory outputs can be obtained with phase-shifted excitation, demonstrating stable tool performance.</p>

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Design and performance analysis of a dual-bending ultrasonic elliptical vibration cutting tool based on cobalt ferrite

  • 期刊论文

  • 发表日期：

    2025年5月24日

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  • Chaoshuai Qi,
  • Zhihuang Shen,
  • Shicong You,
  • Tao Jiang,
  • Jun Pi,
  • Junfeng Huang

摘要

To address the issues such as tool wear, overheating failure, and vibration uniformity in traditional ultrasonic elliptical vibration cutting, a dual-bending ultrasonic elliptical vibration cutting tool is developed using cobalt ferrite giant magnetostrictive materials. This tool achieves large strain, high power, and stable elliptical trajectory output. First, bulk cobalt ferrite giant magnetostrictive material is prepared, and its static magnetostrictive properties are analyzed to clarify the mechanism for improving the performance of the vibration cutting. Next, a dual-bending magnetostrictive elliptical vibration cutting tool is designed based on the Timoshenko beam theory, and finite element simulations are employed to obtain the optimal mode and output trajectory. Then, by designing the static bias magnetic field and the driving magnetic field, the frequency-multiplying effect of the vibration cutting tool is eliminated. Test results indicate that under resonant driving at 45.43 kHz, the temperature increase remains below 60 °C, the tool tip output amplitude reaches 5 μm, and different elliptical trajectory outputs can be obtained with phase-shifted excitation, demonstrating stable tool performance.