Diagnosis of self-excited vibrations in the machine tool – cutting process system

• Autorzy: Bodnar, A. , Marchelek, K.
• Konferencja: Symposium “Vibrations In Physical Systems” (22 ; 19-22.04.2006 ; Będlewo koło Poznania, Polska)
• Języki publikacji: EN

Abstrakty

EN

The work examines the principal problems associated with the diagnosis of self-excited vibrations that frequently develop when cutting materials on machine tools. Heavy vibration (chatter) has a detrimental influence on the machining results, the tool and the tooling. Therefore, it is important to take appropriate countermeasures not only at the stage of the machine tool designing but also at the cutting process planning and the machine operation. First, methods and procedures proposed for locating weak points in the machine tool structure responsible for the chatter development are presented. Then, a number of different methods for on-line chatter detection are tested. Their efficiencies are evaluated and compared. Some remarks on the choice of sensors and their placement on the machine are given. Several examples of self-excited vibration signals stored during unstable milling and the results of their analysis are shown. The directions of future investigations are outlined.

Słowa kluczowe

PL

drgania samowzbudne; trzęsienie głośne; obrabiarka; cięcie

EN

self-excited vibrations; chatter; machine tool; cutting process; vibrostability

• Czasopismo: Vibrations in Physical Systems
• Rocznik: 2006
• Tom: Vol. 22
• Strony: 11--22
• Opis fizyczny: Bibliogr. 13 poz., il., wykr.

Twórcy

autor

Bodnar, A.

• Szczecin University of Technology, Institute of Manufacturing Engineering, Al. Piastów 17, 70-310 Szczecin,

autor

Marchelek, K.

• Szczecin University of Technology, Institute of Manufacturing Engineering, Al. Piastów 17, 70-310 Szczecin,

Bibliografia

• 1. Marchelek K., Dynamika obrabiarek, WNT, Warszawa 1997.
• 2. Marchelek K., Pajor M., Powałka B., Vibrostability of the Milling Process Described by the Time-Variable Parameters Model. JVC, 8 (2002) 467-479.
• 3. Marchelek K., Tomków J., Vibrostability of a Multidimensional Machine Tool-Workpiece-Tool System, Part I: Modeling the Mechanical Structure and Cutting Process. Journal of Vibration and Control, 4 (1998) 99-112; Part II: An Example of Vibrostability Analysis Made on a Vertical Lathe. Ibidem, 113-130.
• 4. Bodnar A., Lisewski W., Metoda diagnostycznych badań obrabiarek ze względu na stabilności pracy. In: Prace Nauk. Inst. Budowy Maszyn Politechniki Wrocławskiej, 30 (1985) 358-364.
• 5. Lisewski W., Bodnar A., Berczyński S., Marchelek K., Analiza słabych ogniw obrabiarki ze względu na stabilność obróbki. Archiwum Technologii Maszyn i Automatyzacji, No. 1/2 (1993) 391-421.
• 6. Tomków J., Wibrostabilność obrabiarek - komputerowe wspomaganie obliczeń i badań doświadczalnych. WNT, Warszawa 1997.
• 7. Insperger T., Stability Analysis of Periodic Delay-Differential Equations Modeling Machine Tool Chatter. PhD dissert., Budapest Univ. of Technology and Economics, Budapest 2002.
• 8. Bodnar A., Vibration Monitoring on a Milling Machine Using the Analysis of Stochastic Features of Generated Noise. Ninth World Congress on the Theory of Machines and Mechanisms, August 29/September 2, 1995, Milano, Vol. 4, 2910-2914.
• 9. Bodnar A., Lisewski W., Skrodzewicz J., Machine Tool Vibration Supervisory System. Prace Nauk. Inst. Budowy Maszyn Polit. Wrocł., 45 (1990) 15-18.
• 10. Włodarski M., Bodnar A., Application of Discrete Wavelet Transform in Vibration Monitoring of Machine Tools. International Conference on Unconventional Electromechanical and Electrical Systems. Alushta, Ukraine, Sept. 24-29, 2004, 877-882.
• 11. Bodnar A., Marchelek K., Diagnostyka stanów dynamicznych systemu obrabiarka – proces skrawania. Zesz. Nauk. Katedry Mechaniki Stosowanej, Politechnika Śląska, 20 (2003) 34-39.
• 12. Bodnar A., Włodarski M., Wykorzystanie pakietów falek do wykrywania drgań samowzbudnych w systemie obrabiarka – proces skrawania. XXXI Ogólnopolskie Sympozjum „Diagnostyka Maszyn”, Węgierska Górka 1-6.03. 2004, Polit. Śl., CD-ROM.
• 13. Liang S.Y., Hecker R.L., Landers R.G., Machining Process Monitoring and Control: The State of the Art. Proc. of IMECE, 17-22 Nov. 2002.