A method of identification of complex cutting forces acting in unstable cutting process

• Autorzy: Bach P. , Polacek M. , Chvojka P. , Burian D. , Drobilek J.
• Języki publikacji: EN

Abstrakty

EN

The calculations of machining stability limit currently known do not provide a precise prediction of chatter-free cutting conditions. The inaccuracy is probably caused by mathematical models of dynamic forces acting on the cutting process during unstable machining. These models need to be modified. A new analysis of experimental data measured by one of the authors, M. Poláček, in the 1968-1974 period, forecasted an existence of several dynamic forces, which are mutually phase-shifted, thus complex. This fact has not been thoroughly investigated previously. As the assumed forces cannot be calculated from any equations, they must be identified experimentally. This research paper proposes a theoretical method of an experimental identification of these forces. The new model is intended to be used in the future for the development of a more accurate calculation of stability diagram.

Słowa kluczowe

EN

chatter; stability inaccuracy; complex cutting forces; forces identification

• Wydawca: Wydawnictwo Wrocławskiej Rady FSNT NOT
• Czasopismo: Journal of Machine Engineering
• Rocznik: 2014
• Tom: Vol. 14, No. 4
• Strony: 18--28
• Opis fizyczny: Bibliogr. 20 poz., rys.

Twórcy

autor

Bach P.

• CTU, Faculty of Mechanical Engineering, RCMT, Prague, Czech Republic

autor

Polacek M.

• CTU, Faculty of Mechanical Engineering, RCMT, Prague, Czech Republic

autor

Chvojka P.

• CTU, Faculty of Mechanical Engineering, RCMT, Prague, Czech Republic

autor

Burian D.

• CTU, Faculty of Mechanical Engineering, RCMT, Prague, Czech Republic

autor

Drobilek J.

• CTU, Faculty of Mechanical Engineering, RCMT, Prague, Czech Republic

Bibliografia

• [1] ALTINTAS Y., et al., 2008, Identification of dynamic force coefficients and chatter stability with process damping, CIRP Annals – Manufacturing Technology, 57, 371–374.
• [2] BACH P., et al., 2013, Comparative analysis of lower speed chatter behaviour, MM Science Journal, 12, ISSN 1212–2572, Accessible from: <http://www.mmscience.eu/201314>
• [3] BACH P., et al., 2014, Dynamic forces in unstable cutting during turning operations, Manufacturing Technology, 14/1, 3–8, ISSN 1213–2489.
• [4] DANĚK O., et al., 1963, Selbsterregte Schwingungen an Werkzeugmaschinen, Verlag Technik Berlin.
• [5] EYNIAN M., 2010, Chatter stability of turning and milling with process damping, Vancouver, A Thesis for the Degree of Ph. D., University of British Columbia.
• [6] GOEL B.S., 1976, Measurement of dynamic cutting force coefficients. A Thesis for the Degree of Ph. D., Hamilton: McMaster University.
• [7] JEMIELNIAK K., 1992, Modelling of dynamic cutting coefficients in three-dimensional cutting, Int. J. Mach. Tools Manufacturing, August 1992, 32, 4, 509–519, Tool Design and Research, 12/3, 201–220.
• [8] LIU C.R., LIU T.M., 1985, Automated chatter suppression by tool geometry control, Journal of Engineering for Industry, 107/2, 95–100.
• [9] PETERS J., et al., 1972, The measurement of the dynamic cutting coefficient, CIRP Annals, 2, 21.
• [10] POLÁČEK M., 1955, Stability calculation of a machine tool structure, Ph.D. thesis, CUT in Prague (in Czech).
• [11] POLÁČEK M., 1968, Device for measurement of the dynamic cutting force coefficient, Research report of VÚOSO in Prague (in Czech).
• [12] POLÁČEK M., Dynamic cutting force coefficients for the steel, AISI1045 (C45) CSN12050.
• [13] POLÁČEK M., 1969, Method of measurement of the dynamic cutting force coefficient, Research report of VÚOSO in Prague (in Czech).
• [14] POLÁČEK M., 1970, Dynamic cutting force coefficient, Research report of VÚOSO in Prague (in Czech).
• [15] POLÁČEK M., 1971, Dynamic cutting force coefficient, Research report of VÚOSO in Prague (in Czech).
• [16] POLÁČEK M., 1974, Influence of the dynamic cutting force coefficient on stability limit calculation, Research report of VÚOSO in Prague (in Czech).
• [17] RAO S.B., 1977, Analysis of dynamic cutting force coefficient, A Thesis for the Degree of Ph. D., Hamilton: McMaster University.
• [18] TLUSTY J., 1978, Analysis of the research in cutting dynamics, Annals of the CIRP, 2/27, 583-589.
• [19] TLUSTY J., et al., 1976, The dynamic cutting coefficient for some carbon steels, Proc. 4th NAMR Conf., Battelle’s Labs, Columbus.
• [20] TUNC L.T., BUDAK E., 2012, Effect of cutting conditions and tool geometry on process damping in machining, Int. Journal of Machine Tools & Manufacture, 57, 10–19.