Identification of dynamic cutting force coefficients and chatter stability with process damping

This paper presents a cutting force model which has three dynamic cutting force coefficients related to regenerative chip thickness, velocity and acceleration terms, respectively. The dynamic cutting force coefficients are identified from controlled orthogonal cutting tests with a fast tool servo os...

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Bibliographic Details
Published in:CIRP annals 2008, Vol.57 (1), p.371-374
Main Authors: Altintas, Y., Eynian, M., Onozuka, H.
Format: Article
Language:English
Subjects:
Applied sciences
Chatter
Cutting
Damping
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Mechanical engineering. Machine design
Physics
Solid mechanics
Structural and continuum mechanics
Vibration, mechanical wave, dynamic stability (aeroelasticity, vibration control...)
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Summary:This paper presents a cutting force model which has three dynamic cutting force coefficients related to regenerative chip thickness, velocity and acceleration terms, respectively. The dynamic cutting force coefficients are identified from controlled orthogonal cutting tests with a fast tool servo oscillated at the desired frequency to vary the phase between inner and outer modulations. It is shown that the process damping coefficient increases as the tool is worn, which increases the chatter stability limit in cutting. The chatter stability of the dynamic cutting process is solved using Nyquist law, and compared favourably against experimental results at low cutting speeds.
ISSN:0007-8506
1726-0604
DOI:10.1016/j.cirp.2008.03.048