Browse > Article

Analysis of the Reduction of the Dynamic Response for the CNC 5 Axles Machining Center  

KIM, Gi Man (금오공과대학교 기계공학과)
CHOI, Seong Dae (금오공과대학교 기계공학부)
Publication Information
Journal of the Korean Society of Manufacturing Process Engineers / v.9, no.5, 2010 , pp. 83-89 More about this Journal
Abstract
In this paper, the dynamic response of a CNC 5 Axles machining center was analyzed and then controlled passively by using the dynamic absorber. For the simplification of the theoretical approach, the CNC 5 Axles machining center was modeled as a flexible beam(Bed) having a point mass(Column), two discrete systems(a Table-set and a dynamic absorber). Specifically by using the dynamic absorber, the dynamic response of a Table-set which be caused by the vibration of a flexible beam, was reduced down to the infinitesimal level. The optimal design factors of the dynamic absorber were obtained from the minimization of the cost function. It was found that the natural frequencies of a UT-380 machining center be varied due to the movement of the Table-set. In view of the dynamic response of a Table-set, the larger spring stiffness and mass of the dynamic absorber were found to give the greater reduction.
Keywords
Dynamic response; Dynamic absorber; Natural frequencies;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 Choi, S.D., Kim, G.M., Kim, J.K., Xu,B., Kim, J. H., and Lee, D.S., "Analysis of structural and vibration for UT-380 machining center," Proc. of the KSMPE Spring Conference 2009, pp. 97-100.
2 Lee, C.S., Chae, S.S., Kim, T.S, Lee, S.M., Park, H.K., Jo, H.T. and Lee, J.C.,"A study on the Vibration Analysis of Tapping Center," Proc. of the KSMPE Spring Conference 2009, pp. 233-238.
3 Jang, S.H., Kwon, B.C., Choi, Y.H., and Park, J. K., "Structural Design Optimization of a Micro Milling Machine for Minimum Weight and Vibrations," Transactions of the KSMTE, Vol. 18, No. 1, pp. 103-109, 2009.
4 Kim, S.M., Jang, S.H., Kim, S.G., Ha, J.S., and Choi, Y.H., "Dynamic Characteristics Analysis of a 5-Axed Multi-tasking Machine Tool by using FEM and Impulse Hammer Test," Proc. of the KSMTE Autumn Conference 2007, pp. 190-194.
5 Lee, S.M.. and Ahn, K.H., "Vibration Characteristics of Large Machine-Tool Structures," Proc. of the KSNVE Spring Conference 1994, pp. 34-38.
6 Lin, S.Y., Fang, Y.C., and Huang, C.W.,"Improvement strategy for machine tool vibration induced from the movement of a counterweight during maching process," Int. J. of Machine Tools & Manufacture. Vol 48, pp. 870-877, 2008.   DOI   ScienceOn
7 Kim, G.M., and Choi, S.D., "Analyses of the Cost function for the Reductions of the Dynamic Response and the Vibrational Intensity of a Discrete System and its Elastic Supporting Beam," Transactions of the Korean Society for Noise and Vibration Engineering, Vol. 20, No.1, pp. 83-91., 2010.   DOI   ScienceOn
8 Kreyszig, E., Advanced Engineering mathematics, John Wiley and Sons, chap. 22, 1983.
9 Snowdon, J.C., Vibration and Shock in Damped Mechanical Systems, Wiley, New York, pp 316-331, 1968.