Incremental Sheet Forming (ISF) of AISI 316 Stainless Steel Sheet Using CNC Milling Machine

Abstract:

Incremental sheet forming (ISF) is a method to form a sheet metal into desired shape and surface features in a batch production series. This method includes forming a clamped sheet metal in controlled conditions by a CNC milling machine, lathe machine or a robot. In this study, the effects of forming parameters on the amount of stretch in stainless steel sheet using a CNC milling machine have been investigated. A ball-point shaped tool made of a bronze alloy was fabricated and used throughout the experiments. The tool acted as the indenter that formed the stainless steel sheet into a small pyramid-like shape. The results showed that as the spindle speed and feed rate increased, the amount of sheet stretch also increased, up to a point where the sheet could not stretch anymore and the process changed from forming to shear thinning and chipping. In addition, the surface quality of the part was badly affected at higher spindle speed and feed rate settings. The temperature of the lubrication oil was also measured during the process and the maximum temperature recorded was 45°C which remained constant until the end of the process. In conclusion, to obtain a good quality part while increasing the productivity of ISF, the optimized values of the feed rate and spindle speed in this work were found to be at 500 mm/min and 1000 rpm respectively.

• Periodical: Advanced Materials Research (Volume 939)
• Pages: 322-327
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.939.322
• Online since: May 2014
• Authors: M. Moayedfar, Zulkiflle Leman*, B.T. Hang Tuah bin Baharudin
• Keywords: Forming, Incremental, ISF, Milling

References

[1] H. Vanhove, J. Verbert, J. Gu, I. Vasilakos and J. Duflou. An experimental study of twist phenomena in single point incremental forming. International Journal of Material Forming, 3 (2010) 975-978.

DOI: 10.1007/s12289-010-0932-8

[2] C. Bouffioux, P. Eyckens, C. Henrard, R. Aerens, A. Van Bael, H. Sol, J. R. Duflou, A.M. Habraken. Identification of material parameters to predict single point incremental forming forces. International Journal of Material Forming, 1 (2008).

DOI: 10.1007/s12289-008-0183-0

[3] W.C. Emmens and A.H. Boogaard. Tensile tests with bending: a mechanism for incremental forming. International Journal of Material Forming, 1 (2008) 1155-1158.

DOI: 10.1007/s12289-008-0185-y

[4] L. Kwiatkowski, M. Urban, G. Sebastiani and A.E. Tekkaya. Tooling concepts to speed up incremental sheet forming. Production Engineering, 4(1) (2010) 57-64.

DOI: 10.1007/s11740-009-0206-9

[5] C. Henrard, C. Bouffioux, P. Eyckens, H. Sol, J. Duflou, P. van Houtte, A. Van Bael, L. Duchˆ{TTP}710 ene and A.M. Habraken. Forming forces in single point incremental forming: prediction by finite element simulations, validation and sensitivity. Computational Mechanics, 47(5) (2011).

DOI: 10.1007/s00466-010-0563-4

[6] 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(2) (2005) 88-114.

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

[7] M. Skjødt, N. Bay, B. Endelt, G. Ingarao. Multi stage strategies for single point incremental forming of a cup. International Journal of Material Forming, 1 (2008) 1199-1202.

DOI: 10.1007/s12289-008-0156-3

[8] A.E. Tekkaya, R. Shankar, G. Sebastiani, W. Homberg and M. Kleiner. Surface reconstruction for incremental forming. Production Engineering, 1(1) (2007) 71-78.

DOI: 10.1007/s11740-007-0024-x

[9] J. Verbert, B. Belkassem, C. Henrard, A. Habraken, J. Gu, H. Sol, B. Lauwers and J. Duflou. Multi-Step toolpath approach to overcome forming limitations in single point incremental forming. International Journal of Material Forming, 1 (2008).

DOI: 10.1007/s12289-008-0157-2

[10] A. Attanasio, E. Ceretti, C. Giardini and Mazzoni L. Asymmetric two points incremental forming: Improving surface quality and geometric accuracy by tool path optimization. Journal of Materials Processing Technology, 197(1-3) (2008) 59-67.

DOI: 10.1016/j.jmatprotec.2007.05.053

[11] I. Cerro, E. Maidagan, J. Arana and P.P. Rodriguez. Theoretical and experimental analysis of the dieless incremental sheet forming process. Journal of Materials Processing Technology, 177(1) (2006) 404-408.

DOI: 10.1016/j.jmatprotec.2006.04.078

[12] G. Hussain, G. Lin and N. Hayat. Improving profile accuracy in SPIF process through statistical optimization of forming parameters. Journal of Mechanical Science and Technology, 25(1) (2011) 177-182.

DOI: 10.1007/s12206-010-1018-8

[13] C. Robert, L. Ben Ayed, A. Delamézière, P. Dal Santo and J.L. Batoz. (2010). Development of a simplified approach of contact for incremental sheet forming. International Journal of Material Forming, 3, 987-990.

DOI: 10.1007/s12289-010-0935-5

[14] J. Duflou, H. Vanhove, J. Verbert, J. Gu, I. Vasilakos, and P. Eyckens. (2010). Twist revisited: Twist phenomena in single point incremental forming. CIRP Annals-Manufacturing Technology, 59(1), 307-310.

DOI: 10.1016/j.cirp.2010.03.018

[15] M. Moayedfar, Z. Leman and BTHT. Baharudin. The effect of forming parameters on the sheet stretch in incremental sheet forming (ISF) process on CNC lathe machine. Advanced Materials Research. 634-638. (2013) 2894-2898.

DOI: 10.4028/www.scientific.net/amr.634-638.2894