In this paper, the occurrence of recoil and surface warp during the flat surface-straight edge hemming process is investigated. A general-purpose finite element code ABAQUS/Standard is used to simulate the hemming operations. Reverse bending and springback are the fundamental mechanisms that cause surface warp and recoil. Recoil and warp are not independent. One parameter, final equivalent warp, is used to represent both. Pre-hemming target ending position is proposed based on the minimization of the final equivalent warp. The influence of the geometrical and process parameters on recoil and warp are also discussed.
A Study on Fundamental Mechanisms of Warp and Recoil in Hemming
Contributed by the Materials Division for publication in the Journal of Engineering Materials and Technology. Manuscript received by the Materials Division July 24, 2000. Guests Editors: Jian Cao and Z. Cedric Xia.
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Zhang , G., Wu , X., and Hu, S. J. (July 24, 2000). "A Study on Fundamental Mechanisms of Warp and Recoil in Hemming ." ASME. J. Eng. Mater. Technol. October 2001; 123(4): 436–441. https://doi.org/10.1115/1.1396348
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