Laser forming of sheet metal offers the advantages of requiring no hard tooling and thus reduced cost and increased flexibility. It also enables forming of some materials and shapes that are not possible now. In single-axis laser bending of plates, the bending edge is found to be somewhat curved and the bending angle varies along the laser-scanning path. These phenomena are termed edge effects, which adversely affect the accuracy of the bending and result in undue residual stress. Numerical investigations are carried out to study the process transiency and the mechanism of the edge effects. Temperature dependency of material properties and strain-rate dependency of flow stress are considered in the numerical simulation to improve prediction accuracy. Numerical results are validated in experiments. Patterns of edge effects and resultant residual stress distributions are examined under a wide range of conditions. A more complete explanation for the mechanism of the edge effects is given.
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February 2001
Technical Papers
Analysis and Prediction of Edge Effects in Laser Bending
Jiangcheng Bao,
Jiangcheng Bao
Department of Mechanical Engineering, Columbia University, New York, NY 10027
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Y. Lawrence Yao
Y. Lawrence Yao
Department of Mechanical Engineering, Columbia University, New York, NY 10027
Search for other works by this author on:
Jiangcheng Bao
Department of Mechanical Engineering, Columbia University, New York, NY 10027
Y. Lawrence Yao
Department of Mechanical Engineering, Columbia University, New York, NY 10027
Contributed by the Manufacturing Engineering Division for publication in the JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING. Manuscript received May 1999; revised Jan. 2000. Associate Editor: J. Lee.
J. Manuf. Sci. Eng. Feb 2001, 123(1): 53-61 (9 pages)
Published Online: January 1, 2000
Article history
Received:
May 1, 1999
Revised:
January 1, 2000
Citation
Bao , J., and Yao, Y. L. (January 1, 2000). "Analysis and Prediction of Edge Effects in Laser Bending ." ASME. J. Manuf. Sci. Eng. February 2001; 123(1): 53–61. https://doi.org/10.1115/1.1345729
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