A method is presented for tool tracking in active magnetic bearing (AMB) spindle applications. The method uses control of the AMB air gap to achieve the desired tool position. The reference tracking problem is transformed from the tool coordinates into the AMB control axes by bearing deflection optimization. Therefore, tool tracking can be achieved by an off-the-shelf AMB controller. The method is demonstrated on a high-speed AMB boring spindle with a proportional integral derivative (PID) control. The hypothetical part geometries are traced in the range of 30 μm. Static external loading is applied to the tool to confirm disturbance rejection. Finally, a numerical simulation is performed to verify the ability to control the tool during high-speed machining.
Issue Section:
Research Papers
Topics:
Bearings,
Control equipment,
Magnetic bearings,
Rotors,
Sensors,
Stress,
Machining,
Deflection,
Cutting tools,
Steady state,
Signals
References
1.
Erdel
, B.
, 2003
, High-Speed Machining
, Society of Manufacturing Engineers
, Dearborn, MI
.2.
King
, R.
, 1985
, Handbook of High-Speed Machining Technology
, Chapman and Hall
, New York
.10.1007/978-1-4684-6421-43.
Knospe
, C.
, 2007
, “Active Magnetic Bearings for Machining Applications
,” Control Eng. Pract.
, 15
(3
), pp. 307
–313
.10.1016/j.conengprac.2005.12.0024.
Zivi
, E.
, Anand
, D.
, Kirk
, J.
, and Anjanappa
, M.
, 1990
, “Magnetic Bearing Spindle Control for Accuracy Enhancement in Machining
,” ASME Winter Annual Meeting
, Dallas, TX
, pp. 283
–297
.5.
Auchet
, S.
, Chevrier
, P.
, Lacour
, M.
, and Lipinski
, P.
, 2004
, “A New Method of Cutting Force Measurement Based on Command Voltage of Active Electro-Magnetic Bearings
,” Int. J. Mach. Tools Manuf.
, 44
(14
), pp. 1441
–1449
.10.1016/j.ijmachtools.2004.05.0096.
Chen
, M.
, and Knospe
, C.
, 2007
, “Control Approaches to the Suppression of Machining Chatter Using Active Magnetic Bearings
,” IEEE Trans. Control Syst. Technol.
, 15
(2
), pp. 220
–232
.10.1109/TCST.2006.8864197.
Pesch
, A.
, and Sawicki
, J.
, 2012
, “Application of Robust Control to Chatter Attenuation for a High-Speed Machining Spindle on Active Magnetic Bearings
,” Proceedings of the 13th International Symposium on Magnetic Bearings (ISMB13)
, Washington, DC
, pp. 1
–11
.8.
Sato
, K.
, and Maeda
, G.
, 2009
, “A Practical Control Method for Precision Motion—Improvement of NCTF Control Method for Continuous Motion Control
,” Precis. Eng.
, 33
(2
), pp. 175
–186
.10.1016/j.precisioneng.2008.05.0069.
Rasmussen
, J.
, Tsao
, T.
, Hanson
, R.
, and Kapoor
, S.
, 1994
, “Dynamic Variable Depth of Cut Machining Using Piezoelectric Actuators
,” Int. J. Mach. Tools Manuf.
, 34
(3
), pp. 379
–392
.10.1016/0890-6955(94)90007-810.
Woronko
, A.
, Huang
, J.
, and Altintas
, Y.
, 2003
, “Piezoelectric Tool Actuator for Precision Machining on Conventional CNC Turning Centers
,” Precis. Eng.
, 27
(4
), pp. 335
–345
.10.1016/S0141-6359(03)00040-011.
Tian
, Y.
, Shirinzadeh
, B.
, and Zhang
, D.
, 2009
, “A Flexure-Based Mechanism and Control Methodology for Ultra-Precision Turning Operation
,” Precis. Eng.
, 33
(2
), pp. 160
–166
.10.1016/j.precisioneng.2008.05.00112.
Sawicki
, J.
, Maslen
, E.
, and Bischof
, K.
, 2007
, “Modeling and Performance Evaluation of Machining Spindle With Active Magnetic Bearings
,” J. Mech. Sci. Technol.
, 21
(6
), pp. 847
–850
.10.1007/BF0302705513.
Wroblewski
, A.
, Sawicki
, J.
, and Pesch
, A.
, 2012
, “Rotor Model Updating and Validation for an Active Magnetic Bearing Based High-Speed Machining Spindle
,” ASME J. Eng. Gas Turbines Power
, 134
(12
), p. 122509
.10.1115/1.400733714.
Fittro
, R.
, Knospe
, C.
, and Stephens
, L.
, 2003
, “Mu Synthesis Applied to the Compliance Minimization of an Active Magnetic Bearing HSM Spindle's Thrust Axis
,” Mach. Sci. Technol.
, 7
(1
), pp. 19
–51
.10.1081/MST-12001895415.
Schweitzer
, G.
, and Maslen
, E.
, 2009
, Magnetic Bearings
, Springer
, Berlin, Heidelberg, Germany
.16.
Altintas
, Y.
, 2000
, Manufacturing Automation: Metal Cutting Mechanics, Machine Tool Vibrations, and CNC Design
, Cambridge University Press
, Cambridge, UK
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