Study of the gyroscopic effect of the spindle on the stability characteristics of the milling system

Xiong, Guo Liang; Yi, Jun; Zeng, Chunhua; Guo, Hongsheng; Li, L.X.

doi:10.1016/s0924-0136(03)00102-x

Cited by 42 publications

(23 citation statements)

References 7 publications

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“…This can be explained by the increasing gyroscopic moment of the rotor at high spindle speed. Similar results were reported in other researches [12,[16][17][18]. From the results of Figs.…”

Section: Measurement Of the Frfsupporting

confidence: 91%

Dynamic cutting force on-line estimation using a 4-electrode cylindrical capacitive displacement sensor mounted on a high speed milling spindle

Kim¹

2008

J Mech Sci Technol

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In this paper, a 4-electrode cylindrical capacitance displacement sensor (CCDS) is presented as an indirect force sensor for a high speed milling spindle. A rotor-bar system for the magnetic exciter is designed to investigate the tool deflection with respect to the applied cutting force. To extract the deflection signal from the CCDS, the dynamic orbital motion at each rotating speed of spindle is predetermined and then subtracted from the CCDS signal. The CCDS signal is also used as a reference sync signal. The rotor-bar system is designed so that the rotor affects the tool-spindle dynamics only as an added mass but does not contribute to the bending property. The additional effect of the rotor mass in the exciter setup is compensated for by an experimental modeling. The cutting force can be estimated by using modified CCDS signals and FRF. Cutting experiments are conducted to show reliable performances of the proposed approach by high speed machining applications.

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“…This can be explained by the increasing gyroscopic moment of the rotor at high spindle speed. Similar results were reported in other researches [12,[16][17][18]. From the results of Figs.…”

Section: Measurement Of the Frfsupporting

confidence: 91%

Dynamic cutting force on-line estimation using a 4-electrode cylindrical capacitive displacement sensor mounted on a high speed milling spindle

Kim¹

2008

J Mech Sci Technol

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“…The basic assumption in the modal reduction method is that the displacement of the spindle can be represented by a linear combination of the normal and constraint modes as follows: (19) and…”

Section: Spindle Modelmentioning

confidence: 99%

“…Only recently, some attempts began to appear in literatures to predict machining chatter based on the spindle dynamic model. Tian and Mohammad et al [17][18][19] considered the gyroscopic effect of the rotating spindle to explore how it relates to the stability characteristics of the milling system. Erturk and Budak [20] researched the effects of system parameters on stability of tool point for typical spindle-holder-tool assemblies.…”

Section: Introductionmentioning

confidence: 99%

Study of milling stability with Hertz contact stiffness of ball bearings

2010

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This present work examines the stability and nonlinear responses of a spindle milling system supported by ball bearings. A shaft finite element based on Timoshenko beam theory is employed to model the spindle, and modal reduction method is therefore adopted for saving the numerical calculating time. The issues of evaluating the effects of the ball bearing Hertz contact stiffness are consequently addressed. It is found that suitable constant bearing stiffness can be adopted to replace the nonlinear nonsmooth Hertz stiffness in prediction of the critical cutting depth of the milling system in certain bearing configuration conditions. For the constant bearing stiffness can be obtained by experiment, this replacement will undoubtedly simplify the spindle-bearing milling system. But with the increase in the bearing clearance, the spindle milling system will present obvious nonlinear behaviors, and the nonlinear Hertz contact bearing stiffness will take over. Isolated islands of chatter vibration, which are induced by the nonlinear nonsmooth bearing Hertz stiffness, can be found exist in milling processes in large bearing clearance conditions.

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“…1 [17]. In this paper, a continuous Timoshenko beam model is employed for predicting frequency responses at the spindle nose, and a two-step Timoshenko beam model of the spindle bearing system is illustrated in Fig.…”

Section: Continuous Beam Model Of Spindle Systemmentioning

confidence: 99%

Research of the spindle overhang and bearing span on the system milling stability

Gao

Meng

2010

Arch Appl Mech

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The effects of spindle overhang and bearing span on the frequency responses and go further contributions on stability of the spindle milling system are investigated in this paper. The transfer functions at the spindle nose are determined by the continuous two-step Timoshenko beam model, which validity is verified by the finite element method. It is found that the first spindle mode is evidently affected by the spindle overhang and has the most important influences on stability of the spindle milling system in this paper, whereas the bearing span mainly alters the spindle's second mode in changing the vibration properties and stability of the system. These results can be considered in the spindle designing to help decreasing frequency amplitudes at spindle nose and improving milling stability in machining processes.

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Study of the gyroscopic effect of the spindle on the stability characteristics of the milling system

Cited by 42 publications

References 7 publications

Dynamic cutting force on-line estimation using a 4-electrode cylindrical capacitive displacement sensor mounted on a high speed milling spindle

Dynamic cutting force on-line estimation using a 4-electrode cylindrical capacitive displacement sensor mounted on a high speed milling spindle

Study of milling stability with Hertz contact stiffness of ball bearings

Research of the spindle overhang and bearing span on the system milling stability

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