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Influence of spindle design parameters on the dynamic stability in end-milling operation

Jakeer Hussain Shaik, Rama Kotaiah K

Abstract


This work presents a combined model of high acceleration end-mill spindle system by considering the dynamics of angular contact ball bearings and cutting forces. At first the the spindle unit is analyzed by taking into consideration the centrifugal as well as the gyroscopic conditions using Timoshenko finite aspect model. Hertz bearing contact forces are considered at the front and {back|rear end} ends of the spindle. Frequency response functions at the tool-tip are obtained from the dynamic spindle model. In the second phase, solid model of the device is developed and their dynamic response is obtained from 3d finite factor analysis. After, verification of the results with beam theory, the stability lobe diagrams are obtained from tool-tip frequency response functions (FRF) for different tool-overhang lengths, bearing span values and bearing preload conditions. A neural network based observer is designed based on the simulation results.


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References


Altintas, Y., Budak, E., 1995, Analytical prediction of stability lobes in milling. Annals of the CIRP. 44, 357–362.

Schmitz, T.L., Davies, M.A., Medicus, K., Snyder, J., 2001, Improving high-speed machining material removal rates by rapid dynamic analysis. Annals of the CIRP. 50, 263–268.

Schmitz, T.L., Ziegert, J.C., Stanislaus, C., 2004, A method for predicting chatter stability for systems with speed-dependent spindle dynamics.Trans. North Amer. Manuf. Res. Institution of SME. 32, 17–24.

Schimtz, T.L., Duncan. G.S., 2005, Three-component receptance coupling substructure analysis for tool point dynamics prediction. J ManufSci Eng. 127, 781–791.

Cheng, C.H., Schmitz, T.L., Duncan, G.S., 2007, Rotating tool point frequency response prediction using RCSA. Machining Science and Technology. 11, 433–446.

Jun, Z., Tony, S., Wanhua, Z., Bingheng, L.U., 2011, Receptance coupling for tool point dynamics prediction on machine tools.Chinese J.Mech.Engg. 24, 1-6.

Kumar, U.V., Schmitz, T.L., 2012, Spindle dynamics identification for

Receptance Coupling Substructure Analysis. Precision Engineering.36, 435– 443.

Erturk, A., Budak, E., Ozguven. H.N., 2007, Selection of design and operational parameters in spindle-holder-tool assemblies for maximum chatter stability by using a new analytical model.Int. J. Machine Tools &Manf. 47, 1401–1409.

Faassen, R.P.H., Wouw, N.V., Oosterling, J.A.J., Ijmeijer. H.N., 2003, Prediction of regenerative chatter by modelling and analysis of high-speed milling. Int. J. Machine Tools &Manf. 43, 1437–1446.

Abele , E., Fiedler, U., 2004, Creating stability lobe diagrams during milling. Annals of the CIRP. 53, 309–312.


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