Experimental Investigation of Springback of DC Series Steel Sheet in V-Bending Process

Abstract

Sheet materials, which are commonly used in sectors such as automotive and whitewares, are usually formed by applying bending operations. The most important problem encountered in bending processes is springback. Springback problem arising from elastic behavior of the material complicates the assembly of manufactured part due to dimensional differences and causes financial loss. For this reason, it is required to properly estimate the springback behavior to provide the dimensional integrity and cost savings of the shaped parts as a result of the bending operations. In this study, the springback behavior of DC series sheet metals forming by V bending was experimentally investigated the different process parameter of material quality, thickness, rolling direction and die angle. The sheet metals have the quality of DC01, DC04 and DC05 and the thickness of 1, 1.5 and 2 mm. The V-bending dies have 60, 90 and 120o angles. From the experimental studies, it is seen that the behavior of springback changes depending on the die and the process parameters.

Keywords

• Springback,Sheet metal,V-bending

References

1. Isiktas, A., “Examining the springback of DKP and stainless steel sheets with different thickness in the V-bending process carried out in different angles,” Master's Thesis, Balıkesir University, Institute of Science, Balıkesir, 2011.
2. Zhang, L.C., Lu, G. and Leong, S.C., “V-shaped sheet forming by deformable punches,” Journal of Materials Processing Technology, vol. 63, pp.134-139, 1997.
3. Esat, V., Darendeliler, H. and Gokler, M.I., “Finite element analysis of springback in bending of aluminium sheets,” Materials and Design, vol. 23, pp.223-229, 2002.
4. Yanagimoto, J., Oyamada, K. and Nakagawa, T., “Springback of high-strength steel after hot and warm sheet formings,” CIRP Annals-Manufacturing Technology, vol. 54, pp.213-216, 2005.
5. Garcia-Romeu, M.L., Ciurana, J. and Ferrer, I., “Springback determination of sheet metals in an air bending process based on an experimental work,” Journal of Materials Processing Technology, vol. 191, pp.174-177, 2007.
6. Tekaslan, O., Seker. U. and Gerger, N., “Determining springback amount of steel sheet metal have 0.75 mm thickness in bending dies sheet materials,” Journal of Engineering Sciences, Pamukkale University Engineering College, vol. 13, pp.15-22, 2007.
7. Bakhshi-Jooybari M., Rahmani B., Daeezadeh V. and Gorji A., “The study of spring-back of CK67 steel sheet in V-die and U-die bending processes,” Materials and Design, vol. 30, pp. 2410-2419, 2008.
8. Osman M.A., Shazly M., El-Mokaddem A. and Wifi A.S., “Springback prediction in V-die bending: modelling and experimentation,” Journal of Achievements in Materials and Manufacturing Engineering, vol. 38(2), pp. 179-186, 2010.

9. Kim, S. and Lee, Y., “Effect of retained austenite phase on springback of cold-rolled TRIP steel sheets,” Materials Science and Engineering A, 530, pp. 218-224, 2011.
10. Otu, R. and Demirci H.I., “Determination of amount springback of AA5754 and Al1050 sheet materials by using different bending methods in 60° V-die bending,” International Iron & Steel Symposium, Karabuk, Turkey, 02-04 April 2012.
11. Ivanišević, A., Milutinović, M., Štrbac, B. and Skakun, P., “Stress State and Spring Back in V-Bending Operations,” Journal for Technology of Plasticity, vol. 38, no.2, pp. 157-168, 2013.
12. Aslan Y. and Karaağaç İ., “V Bükmede Geri Esneme Davranısları,” Gazi Üniversitesi Fen Bilimleri Dergisi, Part: C, Tasarım ve Teknoloji, vol. 2, no. 3, pp. 255-263, 2014.
13. Singh P. and Kumar N., “Experimental and Statistical Study on Springback Behavior in Incremental Sheet Metal Forming Process,” International Journal of Innovative Research in Science, Engineering and Technology, vol. 4(9), pp. 8125-8130, 2015.
14. Esener, E., Sönmez, E., Özsoy, M., and Firat, M. “Determining Springback Behavior of High-Strength Steels via Channel Forming Process,” Acta Physica Polonica A, vol. 132, no.3–II, pp.1010-1012, 2017.
15. Ozdemir A., “Sac metal ürünlerde geri esneme miktarının deneysel ve sonlu elemanlarla tespiti, yapay sinir ağlarıyla tahmini,” Master's Thesis, Gazi University, Institute of Science, Ankara, 2010.
16. Fei, D. and Hodgson, P., “Experimental and numerical studies of springback in air v-bending process for cold rolled TRIP steels,” Nuclear Engineering and Design, vol. 236, pp. 1847-1851, 2006.
17. Kilic, S., “İnvestigation of springback behaviour of DP600 steel,” Master's Thesis, Nigde University, Institute of Science, Niğde, 2009.
18. Turan, S.E., “The investigation of effects of straight flanging and rotary die flanging operations on springback,” Master's Thesis, Istanbul Technical University, Institute of Science, Istanbul, 2009.
19. Livatyalı, H., and Altan, T., “Prediction and elimination of springback in straight flanging using computer aided design methods Part 1. Experimental investigations,” Journal of Materials Processing Technology, vol. 117, pp. 262-268, 2001.
20. Capan, L., Plastic Forming of Metals Metallere Plastik Şekil Verme, Çağlayan Publishing House Kitabevi, Istanbul, 2003.
21. Tekiner, Z., “An Experimental Study on The Examination of Springback of Sheet Metals with Several Thicknesses and Properties in Bending Dies,” Journal of Materials Processing Technology, vol. 145, pp. 109-117, 2004.
22. Chen, P. and Koç, M., “Simulation of Springback Variation in Forming of Advanced High Strength Steels,” Journal of Materials Processing Technology, vol. 190, pp. 189-198, 2007.
23. Sahin, Ç.Ö., “The Observation of Springback Behaviour Resulting from V Die Bending of Sheet Metals,” Master's Thesis, Gazi University, Institute of Science and Technology, Ankara, 2013.