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TECHNICAL PAPERS

A Hydraulically-Actuated Reconfigurable Tool for Flexible Fabrication: Implementation and Control

[+] Author and Article Information
Daniel F. Walczyk, Yong-Tai Im

Department of Mechanical Engineering, Aeronautical Engineering & Mechanics, Jonsson Engineering Center, Rensselaer Polytechnic Institute, Troy, NY 12180-3590

J. Manuf. Sci. Eng 122(3), 562-568 (Aug 01, 1999) (7 pages) doi:10.1115/1.1286258 History: Received October 01, 1998; Revised August 01, 1999
Copyright © 2000 by ASME
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References

Walczyk,  D. F., and Hardt,  D. E., 1998, “Design and Analysis of Reconfigurable Discrete Dies for Sheet Metal Forming,” J. Manufact. Syst., 17, No. 6, pp. 436–434.
Walczyk,  D. F., Lakshmikanthan,  J., and Kirk,  D., 1998, “Development of a Reconfigurable Tool for Forming Aircraft Body Panels,” J. Manufact. Syst., 17, No. 4, pp. 287–296.
Williams, C. J., and Skinner, T., 1923, “Spring Forming Devices,” U.S. Patent No. 1465152.
Walters, T., 1943, “Press,” U.S. Patent No. 2334520.
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Nakajima,  N., 1969, “A Newly Developed Technique to Fabricate Complicated Dies and Electrodes with Wires,” Bull. Jpn. Soc. Manufact. Eng. (JSME), 12, No. 54, pp. 1546–1554.
Hardt, D. E., Robison, R. E., and Webb, R. D., 1985, “Closed-Loop Control of Die Stamped Sheet Metal Parts: Algorithm Development and Flexible Forming Machine Design,” Proceedings of the Advanced Systems for Manufacturing Conference, Madison, Wisconsin, May 14–17, pp. 21–28.
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Finckenstein,  E. V., and Kleiner,  M., 1991, “Flexible Numerically Controlled Tool System for Hydro-Mechanical Deep Drawing” (In German), Ann. CIRP, 40, No. 1, pp. 311–314.
Boas, R., 1997, “Sequential Set-up Mechanism Design for a Reconfigurable Sheet Metal Forming Die,” M.S. thesis, Dept. of Mechanical Engineering, Massachusetts Institute of Technology.
Flinn,  E. D., 1997, “Reconfiguring the Future of Aircraft Tooling,” Aerosp. Am., June, 35, No. 6, pp. 22–23.
Im, Y.-T., 1998, “The Control and Implementation of a Hydraulically-Actuated Reconfigurable Tool for Flexible Fabrication,” M.S. thesis, Dept. of Mechanical Engineering, Rensselaer Polytechnic Institute.
Lakshmikanthan, J., 1997, “Design and Development of a Hydraulically-Actuated Rapid Tooling Device,” M.S. thesis, Dept. of Mechanical Engineering, Rensselaer Polytechnic Institute.
Green, R. E., McCauley, C. J., Oberg, E., Jones, F. D., Horton, H. L., and Ryffel, H. H., 1996, Machinery’s Handbook, A Reference Book for the Mechanical Engineers, Draftsman, Toolmaker, and Machinist, 25th edition, Industrial Press, New York.

Figures

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Reconfigurable discrete die used for forming sheet metal parts and molding composite parts
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Cross-sectional view of a hydraulically-actuated reconfigurable discrete die (only one pin column is shown)
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(a) Experimental set-up used for open loop position control experiments, (b) closed-loop control experiments and (c) close-up view of the valve configuration
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(a) Four pins located along the diagonal that were actuated for interaction test and (b) test set-up for each sampled pin
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System diagram of open-loop control system
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(a) Plotted points cluster around the mean in a normal distribution and (b) two methods of plotting three target point spreads
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Complete 4×4 test set-up for closed-loop control system with setting platen
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Die geometry used for repeatability and accuracy tests
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4×4 test die configured for a (a) spherical shape and (b) saddle shape

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