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TECHNICAL PAPERS

Individual Station Monitoring Using Press Tonnage Sensors for Multiple Operation Stamping Processes

[+] Author and Article Information
Jionghua Jin

Department of Systems and Industrial Engineering, The University of Arizona, Tucson, AZ 85721-0020e-mail: judy@sie.arizona.edu

J. Manuf. Sci. Eng 126(1), 83-90 (Mar 18, 2004) (8 pages) doi:10.1115/1.1643749 History: Received June 01, 2003; Online March 18, 2004
Copyright © 2004 by ASME
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References

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Koh,  C. K. H., Shi,  J., Williams,  W., and Ni,  J., 1999, “Multiple Fault Detection and Isolation Using the Haar Transform—Part II: Application to Stamping Process,” ASME J. Manuf. Sci. Eng., 121(2), pp. 295–299.
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Figures

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Analysis framework for multiple-operation stamping process monitoring
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Segmentation of a whole cycle of signals
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Multiple operations in the doorknob stamping process
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The decomposed individual signals at each working station
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Press tonnage signals at two different punch conditions
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Phase I control limits to check the preliminary in-control data
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Phase II control limits to detect the out-of control condition
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The false alarm rate of the cutoff station

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