ダイレクトドライブ式ＮＣホブ盤に関する研究　Ｉ　　慣性ダンパの併用によるサーボ剛性の増大

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  • Direct-drive NC hobbing machine. 1st report. Increase of servo-stiffness by using an inertial damper.
  • ダイレクト ドライブシキ NC ホブバン ニ カンスル ケンキュウ 1 カンセ

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This paper describes how to increase the stiffness of a servomechanism in a direct-drive NC hobbing machine. Since the equivalent inertia moment of the work-table is very small in the direct-drive NC hobbing machine, the rotating vibration caused by load torque fluctuation becomes very large. To solve this problem, the authors tried to apply damping torque to the servomechanism by an inertial damper. This increased the stiffness without any resonance over a wide frequency range of exciting force. The effect of this inertial damper is verified by theoretical analysis and experiments. Some gear cutting experiments proved that this easy method is practically enough to decrease the rotating vibration of the work-table in the cutting process.

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