Finite Element Prediction on the Machining Stability of Boring Machine with Experimental Verification

Authors

1 Young Researchers and Elite Club, Tabriz Branch, Islamic Azad University, Tabriz, Iran

2 Faculty of Mechanical Engineering, University of Tabriz, Tabriz, Iran

3 Department of Mechanical Engineering, Tabriz Branch, Islamic Azad University, Tabriz, Iran

4 Department of Mechanical Engineering, Eastern Mediterranean University (EMU), Cyprus

5 Department of Mechanical Engineering, Boğaziçi University, Istanbul, Turkey

Abstract

The occurrence of chatter vibrations in boring operation has a great influence in improving workpiece dimensional accuracy, surface quality and production efficiency. In this paper instability analysis of machining process is presented by dynamic model of boring machine. This model, which consists of machine tool’s structure, is provided by finite element method and ANSYS software. The model is evaluated and corrected with experimental results by modal testing on boring machine in which the natural frequencies and the shape of vibration modes are analyzed. The natural frequencies of this modal testing are extracted through Pulse Labshop and ME’scope modal analysis software.Finally, the stability lobes obtained from this model are plotted and compared with experimental results

Keywords


[1]   Tobias, S. A., “Vibration of machine tools”, Production Engineer, Vol. 43, No. 12, 1964, pp. 599.

[2]   Altintas, Y. Manufacturing Automation, “Metal cutting Mechanics, Machine Tool Vibrations, and CNC Design”, Cambridge University Press, 200.

[3]   Budak, E. Ozlu, E., “Analytical modeling of chatter stability in turning and boring operations A multi-dimensional approach”, CIRP Annals- Manufacturing Technology, Vol. 56, No. 1, 2007, pp. 401-404.

[4]   Altintas, Y., Budak, E., “Analytical prediction of stability lobes in milling”, CIRP Annals- Manufacturing Technology, Vol. 44, 1995, pp. 357-362.

[5]   Altintas, Y. Ko, J. H., “Chatter stability of plunge milling”, CIRP Annals- Manufacturing Technology, Vol. 55, No. 1, 2006, pp. 361-364.

[6]   Atabey, F., Lazoglu, I., and Altintas, Y., “Mechanics of boring processes: part I”, International Journal of Machine Tools and Manufacture, Vol. 43, No. 5, 2003, pp. 463-476.

[7]   Atabey, F., Lazoglu, I., and Altintas, Y., “Mechanics of boring processes: part II-multi –insert boring heads”, International Journal of Machine Tools and Manufacture, Vol. 43, No. 5, 2003, pp. 477-484.

[8]   Lazoglu, I., Atabey, F., and Altintas, Y., “Dynamic of boring processes: part III- time domain modeling”, International Journal of Machine Tools and Manufacture, Vol. 42, No. 14, 2002, pp. 1567-1576.

[9]   Altintas, Y., Eynian, M., and Onozuka, H., “Identification of dynamic cutting force coefficients and chatter stability with process damping”, CIRP Annals– Manufacturing Technology, Vol. 57, No. 1, 2008, pp. 371-374.

[10]     Eynian, M., “Chatter stability of turning and milling with process Damping”, The university of British Columbia, Ph.D. dissertation January, 2010.

[11]     Budak, E., “An analytical design method for milling cutters with nonconstant pitch to increase stability, part I: theory”, Journal of Manufacturing Science and Engineering, Vol. 125, 2003, pp. 29-34.

[12]     Budak, E., “An analytical design method for milling cutters with nonconstant pitch to increase stability, part II: application”, Journal of Manufacturing Science and Engineering, Vol. 125, 2003, pp. 35-38.

[13]     Tobias, S. A., “Machine-tool vibration”, J. Wiley, Vol. 43, 1965.