Elucidation of Drilling Behavior on Workpiece Superimposed with Ultrasonic Vibration
Elucidation of Drilling Behavior on Workpiece Superimposed with Ultrasonic Vibration
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DOI：
10.20965/ijat.2022.p0552
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发表时间：
2022-09
期刊：
影响因子：
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通讯作者：
Naofumi Tsuji;Kota Takashima;A. Sakurada;Kazuto Miyawaki;H. Isobe
中科院分区：
文献类型：
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作者：
Naofumi Tsuji;Kota Takashima;A. Sakurada;Kazuto Miyawaki;H. Isobe
这项研究从定量和理论上阐明了超声波振动叠加工件钻孔时凿子啮合的加工特性和切削刃磨损行为。从切削刃与工件的相对运动角度来看，该方法钻孔的加工现象与超声振动主轴钻孔相同。但具体细节尚未明确。本研究开展了钻削初期凿子啮合行为实验和切削刃磨损实验。凿子啮合行为实验表明，轴向相对速度较低，影响较小。在切削刃寿命实验中，当改变切削液和供给方式时，雾状供给的微量油与喷射供给的水溶性的结果相同，且不会损坏钻头。然而，在钻削初始阶段，切削刃产生了相当大的磨损。当采用合适的超声波振动辅助钻孔时，初始磨损减少了 40%，但不能完全抑制。对这种初始磨损进行理论阐述的结果表明，当超过临界振幅时，切削刃的后刀面会接触工件。在证明该理论有效性的实验中，当超过临界振幅时发生初始磨损。切削刃磨损与工作后角成比例增加。
This study quantitatively and theoretically clarifies the machining characteristics of the chisel engagement and the cutting-edge wear behavior in drilling in a workpiece superimposed with ultrasonic vibration. The machining phenomenon of drilling by this method considers being the same as drilling by ultrasonic vibration spindle from the viewpoint of the relative motion of the cutting edge and workpiece. However, the details have not been clarified yet. The chisel engagement behavior experiment at the initial stage of the drilling and cutting-edge wear experiment were carried out in this study. The chisel engagement behavior experiment revealed lower axial relative velocity results in a minor effect. In the cutting-edge life experiment, when the cutting fluid and the supply method were changed, the minimal oil with mist supply showed the same result as water-soluble with jet supply without breaking the drill. However, considerable wear was generated at the cutting edge in the initial drilling stage. When suitable ultrasonic vibration-assisted drilling was applied, initial wear decreased by 40% but could not be suppressed entirely. As a result of theoretical elucidation on this initial wear, it was proven that the flank face of the cutting edge contacted the workpiece when critical amplitude was exceeded. In the experiment to prove the validity of this theory, the initial wear occurred when the critical amplitude was exceeded. The cutting-edge wears increased in proportion to the working relief angle.