Abstract
During Laser bending process, the worksheet bends by means of thermal stresses induced by the laser beam irradiation. It can be achieved by various mechanisms viz. temperature gradient mechanism (TGM), buckling mechanism (BM) and upsetting mechanism (UM). The interactive effect of process parameters viz. laser power, scanning speed, beam diameter and absorption coefficient decide the occurrence of bending mechanism during a laser bending operation. Literature reports experimental as well numerical studies on the effect of process parameters viz. laser power, scan speed, beam diameter on the process mechanism and process performance. However, a very few attempts have been made on the study of shape of laser irradiation path on the quality and productivity of laser bending operation. Curvilinear laser bending is generally used to produce complex shapes using lasers. In this chapter an experimental study on the curvilinear laser bending of aluminum sheets for TGM and BM mechanisms has been presented. Initially the basic principle of the laser bending process and TGM and BM are discussed. Then the experimental procedure, plans are presented. The results are discussed in terms of the effect of laser power and scan speed on the bend angle and edge effect during parabolic irradiation. The experiments are carried out for both thick as well as thin worksheets. It was found that, in thin sheets, the scanning path curvature does not have significant effect on the bend angle however, in thick sheets the bend angle increases with decrease in scanning path curvature. The deformation behavior of curvilinear laser bending was found to be different from that of straight line laser bending process. The presented results may be used as guidelines to generate complex shapes in aluminum and its alloys using lasers.
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References
Bao, J., & Yao, Y. (2001). Analysis and prediction of edge effects in laser bending. Journal of Manufacturing Science and Engineering, 123, 53–61.
Casamichele, L., Quadrini, F., & Tagliaferri, V. (2007). Process-efficiency prediction in high power diode laser forming. Journal of Manufacturing Science and Engineering, 129, 868–873.
Chen, D., Wu, S., & Li, M. (2004). Deformation behaviours of laser curve bending of sheet metals. Journal of Materials Processing Technology, 148, 30–34.
Chen, G., & Xu, X. (2001). Experimental and 3D finite element studies of CW laser forming of thin stainless steel sheets. Journal of Manufacturing Science and Engineering, 123, 66–73.
Cheng, J., & Yao, Y. (2001). Cooling effects in multiscan laser forming. Journal of Manufacturing Processes, 3, 60–72.
Geiger, M., Merklein, M., & Pitz, M. (2004). Laser and forming technology—an idea and the way of implementation. Journal of Materials Processing Technology, 151, 3–11.
Hennige, T. (2000). Development of irradiation strategies for 3D-laser forming. Journal of Materials Processing Technology, 103, 102–108.
Hu, Z., Kovacevic, R., & Labudovic, M. (2002). Experimental and numerical modeling of buckling instability of laser sheet forming. International Journal of Machine Tools and Manufacture, 42, 1427–1439.
Hu, J., Xu, H., & Dang, D. (2013). Modeling and reducing edge effects in laser bending. Journal of Materials Processing Technology, 213, 1989–1996.
Jain, V. K. (Ed.). (2012). Micromanufacturing processes (pp. 283–303). CRC Press, Boca Raton.
Jamil, M., Sheikh, M., & Li, L. (2011). A study of the effect of laser beam geometries on laser bending of sheet metal by buckling mechanism. Optics & Laser Technology, 43, 183–193.
Kannatey-Asibu, E. (2009). Principles of laser materials processing. Hoboken, New Jersey: Wiley.
Kant, R., & Joshi, S. N. (2013). Finite element simulation of laser assisted bending with moving mechanical load. International Journal of Mechatronics and Manufacturing Systems, 6, 351–366.
Kant, R., & Joshi, S. N. (2014). Numerical modeling and experimental validation of curvilinear laser bending of magnesium alloy sheets. Proceedings of The Institute of Mechanical Engineering Part B: Journal of Engineering Manufacture, 228, 1036–1047.
Lawrence, J., Schmidt, M. J. J., & Li, L. (2001). The forming of mild steel plates with a 2.5 kW high power diode laser. International Journal of Machine Tools and Manufacture, 41, 967–977.
Li, W., & Yao, Y. (2000). Numerical and experimental study of strain rate effects in laser forming. Journal of Manufacturing Science and Engineering, 122, 445–451.
Li, W., & Yao, Y. (2001). Numerical and experimental investigation of convex laser forming process. Journal of Manufacturing Processes, 3, 73–81.
Ocana, J., Morales, M., Molpeceres, C., Garcia, O., Porro, J., & Garcia-Ballesteros, J. (2007). Short pulse laser microforming of thin metal sheets for MEMS manufacturing. Applied Surface Science, 254, 997–1001.
Shen, H., Hu, J., & Yao, Z. (2010). Analysis and control of edge effects in laser bending. Optics and Lasers in Engineering, 48, 305–315.
Shen, H., & Vollertsen, F. (2009). Modelling of laser forming—an review. Computational Materials Science, 46, 834–840.
Shi, Y., Liu, Y., Yao, Z., & Shen, H. (2008). A study on bending direction of sheet metal in laser forming. Journal of Applied Physics, 103, 053101.
Shi, Y., Liu, Y., Yi, P., & Hu, J. (2012). Effect of different heating methods on deformation of metal plate under upsetting mechanism in laser forming. Optics & Laser Technology, 44, 486–491.
Shi, Y., Yao, Z., Shen, H., & Hu, J. (2006). Research on the mechanisms of laser forming for the metal plate. International Journal of Machine Tools and Manufacture, 46, 1689–1697.
Singh, K. (2013). Effect of lime coating on laser bending process. M.Tech. thesis, IIT Guwahati.
Venkadeshwaran, K., Das, S., & Misra, D. (2010). Finite element simulation of 3-D laser forming by discrete section circle line heating. International Journal of Engineering Science and Technology, 2, 163–175.
Walczyk, D., & Vittal, S. (2000). Bending of titanium sheet using laser forming. Journal of Manufacturing Processes, 2, 258–269.
Wu, D., Zhang, Q., Ma, G., Guo, Y., & Guo, D. (2010). Laser bending of brittle materials. Optics and Lasers in Engineering, 48, 405–410.
Yanjin, G., Sheng, S., Guoqun, Z., & Yiguo, L. (2003). Finite element modeling of laser bending of pre-loaded sheet metals. Journal of Materials Processing Technology, 142, 400–407.
Zahrani, E. G., & Marasi, A. (2013). Experimental investigation of edge effect and longitudinal distortion in laser bending process. Optics & Laser Technology, 45, 301–307.
Zhang, P., Guo, B., Shan, D., & Ji, Z. (2007). FE simulation of laser curve bending of sheet metals. Journal of Materials Processing Technology, 184, 157–162.
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Kant, R., Bhuyan, P.M., Joshi, S.N. (2015). Experimental Studies on TGM and BM Dominated Curvilinear Laser Bending of Aluminum Alloy Sheets. In: Joshi, S., Dixit, U. (eds) Lasers Based Manufacturing. Topics in Mining, Metallurgy and Materials Engineering. Springer, New Delhi. https://doi.org/10.1007/978-81-322-2352-8_5
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DOI: https://doi.org/10.1007/978-81-322-2352-8_5
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