超音波振動を援用した難 ... - iprec.nagaokaut.ac.jp

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2 PCDPCD WW--EDMEDM PCDPCD PCDPCD 1010 mm mmRzRz 200 mWith vibrationWith vibrationWithout vibrationWithout vibration 1/21/2 3/43/4 ChipChippocketpocket8080 mm 300300 mmPCD layerPCD layer XY 9 m10 m 1mm #325-400 5,000rpm 5mm/min 10 m/pass MFF 40kHz / mPCD 5,000rpm 5mm/min m/pass LB-10 40kHz / m vibrationwithout vibrationwith vibrationwithout vibrationTime secCutting force vibrationwithout vibrationwith vibrationwithout vibrationTime secCutting force NFeed force (Fy) Thrust force (Fz)

3 PCDPCD WW--EDMEDM Fn ss= = kk/ / MM dd>> >> ss dd 60kHz60kHz ss 100Hz100Hz Fn ChipToolFeed10 mContact phaseSeparation phaseFeed 5101501020304050 Machining force NMachining force NTimeTimesecsecVibrationVibrationassiste dassistedConventionalConventionalHorizon tal comp.

4 Specifications of spindle for USMS pindle speed~20,000 min-1 Oscillation frequency 40 kHzAmplitude ~2 m in axialRun-out mStiffness in radial N/ min thrust N/ mTorque 55 Nmm Logo SUSSUS

5 200 pass500 m SEM SEM 200 pass500 m 500 m500 m N N Sec Sec 200 pass 20 pass N N Sec Sec 200 pass 20 pass : 180 13 : A5052 :8mm : :3l/min : 2880rpm : : 25mm/s.

6 5 m Ti-6Al-4V 1010,,000rpm000rpm 200mm/min200mm/min m/m/revrev LBLB--11 40kHz / / mm Max. deviation: 87 Max. deviation: 87 N mm 15% 020406080100120 ConventionalUltrasonicNumberNumberof holesof holes400806040200 202040406060 Chip loadChip load m/revm/rev333320206611N/AN/A10 500 mRa500 mRa 3m/min 718718 1/31/3 Work piece(Inconel 718)Rotational directionCutting tool(30kHz / m)Coolant ( )Feed directionTangential directionPrincipal direction 25 110 ( HW-S10)

7 3 = m m from 21th to 30th holefrom 21th to 30th hole = m m from 21th to 30th holefrom 21th to 30th hole