A General Method of Numerical Simulation for Incremental Forming

Abstract:

This paper presents a general simulation method for sheet metal incremental forming(ISF). Firstly, a three-dimensional finite element model based on Dynaform was developed to simulate the process. The tool path during the process simulation was directly defined by numerical control (NC) code and so identical with that in operation. Then, the results of numerical simulations with different process parameters, such as tool diameter, depth increment and wall angle, were discussed in details. The simulations reveal that with the decreasing depth step, increasing tool diameter and wall inclination angle, the axial stress reduces and leads to thinning reduction and more uniform thickness distribution. In addition, as the definition of the tool path was in accord with the genuine motion trajectory of the tool, the results deduced from this model may be more precise compared with those from other previously simplified models.

• Periodical: Advanced Materials Research (Volumes 403-408)
• Pages: 4084-4088
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.403-408.4084
• Online since: November 2011
• Authors: Li Jun Chen, Geng Pei, Qing Bo Fang, Jun Jie Pan
• Keywords: Finite Element Method (FEM), Forming Principle, Numerical Simulation, Sheet Metal Incremental Forming

References

[1] Shim, M. S. and Park, J. J. The formability of aluminum sheet in incremental forming. J. Mater. Process. Technol. 654-658 (2001).

[2] Iseki, H. An approximate deformation analysis and FEM analysis for the incremental bulging of sheet metal using a spherical roller. J. Mater. Process. Technol. 150–154 (2001).

DOI: 10.1016/s0924-0136(01)00500-3

[3] Kim, Y. H. and Park, J. J. Effect of process parameters on formability in incremental forming of sheet metal. J. Mater. Process. Technol. 130–131 (2002), 42–46.

DOI: 10.1016/s0924-0136(02)00788-4

[4] Ambrogio, G., Costantino, I., and De Napoli, L. Influencemerical and experimental investigation. J. Mater. Process. Technol. 153–154 (2004).

[5] Ma Linwei, Mo Jianhua. 3-D FEM simulation of sheet metal single-point incremental forming and the deformation pattern analysis．Proc. IMech of some relevant process parameters on the dimensional accuracy in incremental forming: a nu E Vol. 222 Part BJ. Engineering Manufacture (2004).

DOI: 10.1243/09544054jem957

[6] Han Fei, Mo Jian-hua. Numerical simulation and Experimental investigation of the incremental sheet forming process. J. Cent. South Univ. Technol. 581-587 (2008).

DOI: 10.1007/s11771-008-0109-5

[7] J.R. Duflou, J. Verbert, B. Belkassem, et al. Process window enhancement for single point incremental forming through multi-step toolpaths. CIRP Annals – Manufacturing Technology, 253-256 (2008).

DOI: 10.1016/j.cirp.2008.03.030