Experimental Study on the Overall Spifability of AISI 304 Sheets under Different Bending Conditions

Abstract:

In this paper the influence of the bending effect in the formability of AISI 304 metal sheets in incremental forming is analyzed. For this purpose, a series of single point incremental forming tests were carried out using a variety of tool diameters and step downs. The spifability (formability in single point incremental sheet forming) of the metal sheets was studied in the light of circle grid analysis by means of the 3D deformation digital measurement system ARGUS®. The results show the importance of the bending effect, induced by the tool radius, in the enhancement of formability in incremental forming compared to conventional forming processes.

• Periodical: Key Engineering Materials (Volumes 554-557)
• Pages: 2293-2298
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.554-557.2293
• Online since: June 2013
• Authors: Gabriel Centeno Báez, Isabel Bagudanch, Maria Luisa Garcia-Romeu, Andrés J. Martínez-Donaire, Carpoforo Vallellano
• Keywords: Bending Effect, Single Point Incremental Forming (SPIF), Spifability

References

[1] W.C. Emmens, A.H. van den Boogaard, An overview of stabilizing deformation mechanisms in incremental sheet forming, Journal of Material Processing Technology, 209 (2009), 3688–3695.

DOI: 10.1016/j.jmatprotec.2008.10.003

[2] W.C. Emmens, A.H. van den Boogaard, Cyclic stretch-bending: Mechanics, stability and formability, Journal of Material Processing Technology, 211 (2011), 1965–1981.

DOI: 10.1016/j.jmatprotec.2011.06.017

[3] C. Vallellano, D. Morales, A. Martínez, F. J. García-Lomas, On the Use of Concave-Side Rule and Critical-Distance Methods to Predict the Influence of Bending on Sheet-Metal Formability, International Journal of Material Forming, 3 (S1), (2010), 1167-1170.

DOI: 10.1007/s12289-010-0980-0

[4] T.B. Stoughton, J.W. Yoon, A new approach for failure criterion for sheet metals, International Journal of Plasticity 27 (2011), 440-459.

DOI: 10.1016/j.ijplas.2010.07.004

[5] M.B. Silva, P.S. Nielsen, N. Bay, P.A.F. Martins: Failure mechanisms in single point incremental forming of metals, International Journal of Advanced Manufacturing Technology, 56 (2011), 893-903.

DOI: 10.1007/s00170-011-3254-1

[6] G. Centeno, F.J. Doblas, L.H. Martínez-Palmeth, A.J. Martínez-Donaire, C. Vallellano, FEA of the Bending Effect in the Formability of Metal Sheets via Incremental Forming, Steel Research International, Special Edition: 14th Metal Forming International Conference 2012, 447-450.

DOI: 10.1016/j.proeng.2013.08.205

[7] G. Centeno, M.B. Silva, V.A.M. Cristino, C. Vallellano, P.A.F. Martins, Hole-flanging by incremental sheet forming, Int. Journal of Machine Tools and Manufacture, 59 (2012), 46-54.

DOI: 10.1016/j.ijmachtools.2012.03.007

[8] R. Pérez-Santiago, I. Bagudanch, M.L. García-Romeu, Force Modeling in Single Point Incremental Forming of Variable Wall Angle Components, Key Engineering Materials, 473 (2011), 833-840.

DOI: 10.4028/www.scientific.net/kem.473.833

[9] M.B. Silva, M. Skjoedt, N. Bay, P.A.F. Martins, Revisiting single-point incremental forming and formability/failure diagrams by means of finite elements and experimentation. International Journal of Machine Tools & Manufacture, 48 (2008), 73-83.

DOI: 10.1016/j.ijmachtools.2007.07.004

[10] J. Jeswiet, F. Micari, G. Hirt, A. Bramley, J. Duflou, J. Allwood, Asymmetric Single Point Incremental Forming of Sheet Metal. CIRP Annals- Manufacturing Technology, 54 (2005), 88-114.

DOI: 10.1016/s0007-8506(07)60021-3