Formability Enhancement for Tailor-Welded Blanks Using Blank Holding Force Control

[+] Author and Article Information
Sijun He, S. Jack Hu

Department of Mechanical Engineering, The University of Michigan, Ann Arbor, MI 48109

Xin Wu

Department of Mechanical Engineering, Wayne State University, Detroit, MI 48202

J. Manuf. Sci. Eng 125(3), 461-467 (Jul 23, 2003) (7 pages) doi:10.1115/1.1580853 History: Received August 01, 2002; Revised February 01, 2003; Online July 23, 2003
Copyright © 2003 by ASME
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Iwata,  Noritoshi, Matsui,  Masao, Nakagawa,  Norihiko, and Ikura,  Shin, 1995, “Improvements In Finite-Element Simulation For Stamping And Application To The Forming of Laser-Welded Blanks,” J. Mater. Process. Technol., 50(1), pp. 335–347.
Saunders,  F. I., and Wagoner,  R. H., 1996, “Forming of Tailored Welded Blanks,” Metall. Mater. Trans. A, 27(A/9), pp. 2605–2616.
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Kinsey,  B., Liu,  Z. H., and Cao,  J., 2000, “A Novel Forming Technology For Tailor Welded Blanks,” J. Mater. Process. Technol., 99, pp. 145–153.
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Importance of tooling/blank match during TWB forming
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Two-dimensional analytical model for TWB
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Estimated BHF as a function of punch travel distance required by zero weld line movement in TWB strip drawing (0.8/1.5 mm)
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Metal flow in vs. forming height with same BHF over two sides (4 ton/4 ton)
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Punch friction effect on weld line movement (thickness ratio=0.7/1.5,h=50.8 mm)
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Die friction effect on weld line movement (thickness ratio=0.7/1.5,h=50.8 mm)
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Effect of BHF difference (ton) over the weld line displacement (thickness ratio=0.7/1.5,μ=μ12=0.05)
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Schematic diagram of segmented binder
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Strip drawing under different BHF ratio
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Weld line movement under different BHF difference
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Thickness distributions for TWB box drawing with and without BHF control
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Comparison between TWB box drawing with and without BHF control
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Influence of punch bottom contact length (friction coefficient 0.05, I5=I5+100)



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