This paper addresses the modeling and prediction of the normal holding force in an electromagnetic chuck used in precision machining applications. Knowledge of the normal holding force is necessary to determine if a given chuck is capable of preventing workpiece slip during machining. First, an analytic model termed the magnetic circuit model was developed and compared with experimental holding force data. It was found that this model, although simple in form, was limited in its ability to accurately predict the holding force over the entire range of conditions investigated. The discrepancies in the model were attributed to its inability to accurately model the leakage flux and nonuniform distribution of the magnetic flux. A three-dimensional finite element model was then developed to overcome these limitations. Predictions with this model were found to be in better agreement with experiments, yielding prediction errors within 25 percent in most cases. The finite element model also provided an explanation for the observed decrease in the measured holding force at current values beyond a certain threshold. [S1087-1357(00)01503-3]
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August 2000
Technical Papers
Modeling of the Holding Force in an Electromagnetic Chuck
Alejandro Felix,
Alejandro Felix
The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0405
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Shreyes N. Melkote,
Shreyes N. Melkote
The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0405
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Yoichi Matsumoto
Yoichi Matsumoto
The Timken Company, Canton, OH 44706-0930
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Alejandro Felix
The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0405
Shreyes N. Melkote
The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0405
Yoichi Matsumoto
The Timken Company, Canton, OH 44706-0930
Contributed by the Manufacturing Engineering Division for publication in the JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING. Manuscript received May 1999; revised Nov. 1999. Associate Technical Editor: Y. M. Wang.
J. Manuf. Sci. Eng. Aug 2000, 122(3): 569-575 (7 pages)
Published Online: November 1, 1999
Article history
Received:
May 1, 1999
Revised:
November 1, 1999
Citation
Felix, A., Melkote, S. N., and Matsumoto, Y. (November 1, 1999). "Modeling of the Holding Force in an Electromagnetic Chuck ." ASME. J. Manuf. Sci. Eng. August 2000; 122(3): 569–575. https://doi.org/10.1115/1.1286259
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