超音波振動するドリルによる加工特性向上:第1報:食い付き性の改善と振動モードの影響  [in Japanese] Improvement of cutting performance by ultrasonic vibration drilling:1<sup>st</sup> report: Decrease in runout and influence of vibration mode  [in Japanese]

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Abstract

ドリル加工において,工具を超音波振動させることで,加工抵抗の低減や切りくずの分断による排出性向上などの効果が知られている.本研究では,チタン合金Ti-6Al-4Vに対する直径1mm以下の小径ドリル加工について,実験的に超音波振動重畳の効果を検証する.加工初期段階における高速度カメラを用いた撮影および切りくずの観察によって,とくに工具と被削材が接触した直後の切削状況について実験的に検証した.その結果,被削材に振動するドリルのチゼルが被削材に食い込むことで,穴位置のずれが抑制されることがわかった.また,断続切削の条件下では,切りくずが断片化し,工具寿命も飛躍的に延びることが確認された.また,ドリルの振動モードがバリや穴位置のばらつきに与える影響について実験的に明らかにした.

Several studies have indicated that ultrasonic vibration drilling improves cutting performance by reduction of cutting force, fragmentation of chips, etc. In this research, we demonstrated the effect of ultrasonic vibration drilling less than 1 mm diameter on titanium alloy. The chip generation phenomenon in the early period was captured by high-speed photography and the shapes of chips generated under various drilling conditions were compared. The results indicated that the deviation of drilled hole positions was improved due to an increase in biting performance of the chisel edge on the surface of the workpiece by ultrasonic vibration. The intermittent drilling conditions were induced when the chip load was small relative to the amplitude of vibration. Under intermittent conditions, fragmented chips were generated and tool wear was markedly reduced. Furthermore, experiments verified the effects of vibration mode of a commercial drill on burr generation, drilled hole diameter, and deviation of hole position.

Journal

  • Journal of the Japan Society for Abrasive Technology

    Journal of the Japan Society for Abrasive Technology 59(6), 328-333, 2015

    The Japan Society for Abrasive Technology

Codes

  • NII Article ID (NAID)
    130005097951
  • NII NACSIS-CAT ID (NCID)
    AN10192823
  • Text Lang
    JPN
  • ISSN
    0914-2703
  • NDL Article ID
    026516482
  • NDL Call No.
    Z16-1147
  • Data Source
    NDL  J-STAGE 
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