S1301-2-2 磁性流体による工作機械主軸のリアルタイムバランシングの実現に関する研究(工作機械と生産加工(2))

概要

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Spindle vibration of machine tools causes tool wear prematurely and decreases machining accuracy. The vibration changes depending on the used tooling and the rotation speed during various machining operations. In particular, even small unbalance mass of the spindle makes large whirl in high speed machining. However, real-time balancing for a machine tool spindle has not yet been realized successfully including the influence of the used tooling. In this study, a real-time balancing mechanism using magnetic fluid is proposed. The magnetic fluid is enclosed inside the spindle, and the distribution of circumferential mass is controlled to compensate for unbalance mass in real-time. A machine tool spindle equipped with the proposed real-time balancing mechanism is designed and developed. It is experimentally confirmed that unbalance response of the spindle is significantly improved. The experimental results proved the feasibility of the proposed real-time balancing mechanism for a machine tool spindle.
2009-09-12