Inducing a machine spindle to ultrasonically vibrate by fluctuating electromagnetic force

Issue title: Proceedings of the twelfth International Symposium on Interdisciplinary Electromagnetic, Mechanic and Biomedical Problems, ISEM Bad Gastein

Article type: Research Article

Authors: Wu, Yongbo^{a; *} | Tamano, Masanori^b | Kato, Masana^a | Tachibana, Toru^c

Affiliations: [a] Department of Machine Intelligence and Systems Engineering, Akita Prefectural University, Tsuchiya-ebinokuchi 84-4, Yurihonjo, Akita 015-0055, Japan | [b] Graduate school, Akita Prefectural University, Tsuchiya-ebinokuchi 84-4, Yurihonjo, Akita 015-0055, Japan | [c] Micron Machinary Co., Ltd., Zao-Uwano 578-2, Yamagata 990-2303, Japan

Correspondence: [*] Corresponding author. Tel.: +81 184 27 2144; Fax: +81 184 27 2165; E-mail: wuyb@akita-pu.ac.jp

Abstract: A new method for inducing a machine spindle to vibrate ultrasonically was proposed. Rather than using piezoelectric or magnetostrictive transducers, common in conventional ultrasonic vibration spindles, the new method utilizes a fluctuating electromagnetic force to induce the spindle to vibrate ultrasonically along its axis. An experimental rig was constructed to confirm the generation of the ultrasonic vibration. Following the measurement of the fluctuating magnetic force, axial ultrasonic vibration generated on the spindle was investigated for various conditions such as the frequency and magnitude of the applied electric power and the gap between the electromagnet and the spindle. As a result, it was found that: (1) the magnetic force increases as the electric power increases but decreases as the gap increases; and (2) the spindle vibration amplitude shows the same tendency as that of the magnetic force. The maximum vibration amplitude obtained was 5.4 μm.

Keywords: Machine spindle, ultrasonic vibration, internal grinding, electromagnetic force

DOI: 10.3233/JAE-2007-759

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 25, no. 1-4, pp. 621-626, 2007