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TECHNICAL PAPERS

A New Mechanism Explaining High Frequency Chatter Vibration Involving Tool Tip X-Y Looping in Fine Boring

[+] Author and Article Information
Evita Edhi, Tetsutaro Hoshi

Toyohashi University of Technology (TUT), Production Systems Engineering Department, 1-1 Hibarigaoka, Tenpaku Cho, Toyohashi, Aichi 441-8580, Japan

J. Dyn. Sys., Meas., Control 123(3), 370-376 (Feb 25, 2000) (7 pages) doi:10.1115/1.1387017 History: Received February 25, 2000
Copyright © 2001 by ASME
Topics: Vibration , Chatter , Cutting
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References

Hahn,  R. S., 1954, “On the Theory of Regenerative Chatter in Precision Grinding Operations,” Trans. ASME, 76, pp. 593–597.
Tlusty, T., and Polacek, M., 1963, “The Stability of the Machine Tool Against Self-Excited Vibration in Machining,” Intl. Research in Prod. Engineering, ASME, pp. 465–474.
Tobias, S. A., 1965, Machine Tool Vibration, Blackie, London, Glasgow, p. 155.
Merrit,  H. E., 1965, “Theory of Self-Excited Machine Tool Chatter,” Trans. ASME, 87, No. 4, pp. 447–454.
Das,  M. K., and Tobias,  S. A., 1967, “The Relation Between the Static and Dynamic Cutting of Metals,” Int. J. Mach. Tool Des. Res., 7, pp. 63–89.
Hoshi,  T., and Takemura,  T., 1972, “Cutting Dynamics Associated with Vibration Normal to Cut Surface,” Bul. Faculty of Eng. Kyoto Univ,34, No. 4, Oct. pp. 373–392.
Hoshi,  T., 1972, “Cutting Dynamics Associated with Vibration Normal to Cut Surface,” Annals of the CIRP,21/1, pp. 101–102.
Arnold,  R. N., 1946, “The Mechanism of Tool Vibration in the Cutting of Steel,” Proc. Inst. Mech. Eng., 154, pp. 261–284.
Sweeney, G., and Tobias, S. A., 1963, “An Algebraic Method for the Determination of the Dynamic Stability of Machine Tools,” Proc. Int. Res. Prod. Eng, Pittsburgh, ASME.

Figures

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Boring tools used for experiments
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Experimental setup for cutting test and structural dynamic test on vertical machining center
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Example set of chatter measurement
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Phase lag between inner and outer modulation
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Result of cutting tests describing the phase angle ∠Y/X between X and Y vibration displacement and the phase lag φ between inner and outer modulations
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Compliance frequency response function measured by sinusoidal excitation in θ=45 and 135 deg orientations of tool C mounted on setting head R. Amplitude of chatter vibration observed in cutting tests is also shown in the lower part.
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Cutting edge oscillation in looped path as identified on boring tools B and C in cutting experiments under the dynamic cutting force Fc
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Cutting process dynamics Fcx/X and Fcy/X due to the regeneration effect and the imaginary part effect of inner modulation as presented in a stiffness polar diagram. The structural dynamics Fmx/X and Fmy/Y are also shown.
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Comparison of amounts of energy supplied per cycle Es and dissipated Ed computed for all cases of cutting tests observed with onset of chatter
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Average values of percentage share between mechanisms calculated for energy supplied and dissipated
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Two orthogonal orientations m1 and m2 of the natural bending vibration at the end part of boring tool having non-circular cross section
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Comparison of time phase between X and Y dynamic cutting force components calculated versus time phase experimentally measured between X and Y vibration displacements for all cases of cutting test observed with chatter

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