TY - JOUR
T1 - Estimation of Process Damping Coefficient Using Dynamic Cutting Force Model
AU - Chung, Chunhui
AU - Tran, Minh Quang
AU - Liu, Meng Kun
N1 - Funding Information:
This study was supported by Ministry of Science and Technology, Taiwan. The Grant Number is MOST 107-2221-E-006 -234 -MY3.
Funding Information:
This study was supported by Ministry of Science and Technology, Taiwan. The Grant Number is MOST 107-2221-E-006 -234 -MY3. b Axial depth of cut b lim Limiting depth of cut C Velocity independent coefficient c Structure damping coefficient c d Process damping coefficient E Young’s modulus of elasticity F d Process damping forces G xx , G yy Direct transfer functions F x , F y Cutting force in x and y directions f t Feed per tooth h Instantaneous chip thickness , K n K t Radial and tangential cutting coefficients K d Indentation coefficient , K ne K te Radial and tangential edge coefficients k Structure stiffness N t Number of flutes S d Instantaneous indentation area V Cutting velocity , Λ Re Λ Im Real part and imaginary part of the eigenvalue Λ α Directional oriented factor Δ Dynamic displacement of the tool structure ε Phase shift between subsequent tooth passes λ Wavelength of wavy surface γ Relief angle θ Immersion angle , θ s θ e Start and exit angle of tooth in cut ω c Chatter frequency Ω Spindle speed ϕ Tool rotation angle ρ Extent of the deformation zone τ Tool passing period μ Coefficient of friction υ Poisson’s ratio
Publisher Copyright:
© 2020, Korean Society for Precision Engineering.
PY - 2020/4/1
Y1 - 2020/4/1
N2 - A model of process damping in milling was developed in this study. The process damping is a critical parameter to increase the stable cutting region at low cutting speed to avoid chatter. The previous studies conducted experiments to estimate the process damping. Nevertheless, it is time and cost consuming. A model of dynamic cutting force was employed in this study. The plowing force generated by the flank-wave contact is considered as the main source of process damping to dissipate vibratory energy during cutting. In addition to the material properties and plowing force, the effects of chatter amplitude and wavelength, which result in the various indentation conditions and affect the coefficient of process damping, were also considered. The consideration of wavy contact surface and indentation area in this model allows quick determination of cutting stability conditions with high accuracy. The process damping coefficient estimated by the proposed model successfully represented the effect of the tool wear on chatter because of the change of tool geometry. Experiments were conducted to verify the new model.
AB - A model of process damping in milling was developed in this study. The process damping is a critical parameter to increase the stable cutting region at low cutting speed to avoid chatter. The previous studies conducted experiments to estimate the process damping. Nevertheless, it is time and cost consuming. A model of dynamic cutting force was employed in this study. The plowing force generated by the flank-wave contact is considered as the main source of process damping to dissipate vibratory energy during cutting. In addition to the material properties and plowing force, the effects of chatter amplitude and wavelength, which result in the various indentation conditions and affect the coefficient of process damping, were also considered. The consideration of wavy contact surface and indentation area in this model allows quick determination of cutting stability conditions with high accuracy. The process damping coefficient estimated by the proposed model successfully represented the effect of the tool wear on chatter because of the change of tool geometry. Experiments were conducted to verify the new model.
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U2 - 10.1007/s12541-019-00297-5
DO - 10.1007/s12541-019-00297-5
M3 - Article
AN - SCOPUS:85077526518
VL - 21
SP - 623
EP - 632
JO - International Journal of Precision Engineering and Manufacturing
JF - International Journal of Precision Engineering and Manufacturing
SN - 1229-8557
IS - 4
ER -