期刊
CHINESE JOURNAL OF AERONAUTICS
卷 35, 期 2, 页码 332-345出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.cja.2020.12.039
关键词
Apparent elastic method; Machining behavior; Ultrasonic vibration-assisted grinding; Ultrasonic vibration plate device; Vibration coupling effects
资金
- National Natural Science Foundation of China [51921003, 51775275]
- National Key Laboratory of Science and Technology on Heli-copter Transmission (Nanjing University of Aeronautics and Astronautics) [HTL-A-20G01]
- Postgraduate Research & Practice Innovation Program of Jiangsu Province [KYCX20_0179]
This article proposes a new method of ultrasonic vibration-assisted grinding (UVAG) and demonstrates its effectiveness in improving the machined surface quality of hard-to-cut materials.
Ultrasonic vibration-assisted grinding (UVAG) is an effective and promising method for machining of hard-to-cut materials. This article proposed an ultrasonic vibration plate device enabling the longitudinal full-wave and transverse half-wave (L2T1) vibration mode for UVAG. The characteristics of two-dimensional coupled vibration in different directions were analyzed on the basis of apparent elastic method and finite element method. Furthermore, a correction factor was applied to correct the frequency error caused by the apparent elastic method. Finally, the com-parative experiments between the conventional creep-feed grinding and UVAG of Inconel 718 nickel-based superalloy were carried out. The results indicate that the apparent elastic method with the correction factor is accurate for the design of plate device under the L2T1 vibration mode. Com-pared with the conventional creep-feed grinding, the UVAG causes the reduction of grinding force and the improvement of machined surface quality of Inconel 718 nickel-based superalloy. Further-more, under the current experimental conditions, the optimal ultrasonic vibration amplitude is determined as 6 lm, with which the minimum surface roughness is achieved. (c) 2021 Chinese Society of Aeronautics and Astronautics and Beihang University. Production and hosting by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons. org/licenses/by-nc-nd/4.0/).
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