[en] Single point incremental forming (SPIF) suffers from process window limitations which are strongly determined by the maximum achievable forming angle. Forming consecutive, intermediate shapes can contribute to a significantly enlarged process window by allowing steeper maximum wall angles for a range of part geometries. In this paper an experimentally explored multi-step toolpath strategy is reported and the resulting part geometries compared to simulation output. Sheet thicknesses and strains achieved with these multi-step toolpaths were verified and contribute to better understanding of the material relocation mechanism underlying the enlarged process window.
Disciplines :
Materials science & engineering
Author, co-author :
Duflou, J. R.
Verbert, J.
Belkassem, B.
Gu, J.
Sol, Hugo
Henrard, Christophe ; Université de Liège - ULiège > Département Argenco : Secteur MS2F > Département Argenco : Secteur MS2F
Habraken, Anne ; Université de Liège - ULiège > Département ArGEnCo > Département ArGEnCo
Language :
English
Title :
Process window enhancement for single point incremental forming through multi-step toolpaths
Jeswiet J., Micari F., Hirt G., Bramley A., Duflou J.R., and Allwood J. Asymmetric Single Point Incremental Forming of Sheet Metal. CIRP Annals-Manufacturing Technology 54/2 (2005) 623-649
Matsubara S. Incremental Backwards Bulging of Sheet Metal With an Hemispherical Head Tool. Journal of the Japan Society for Technology of Plasticity 5 (1994) 119-123
Duflou J.R., Lauwers B., Verbert J., Tunckol Y., and De Baerdemaeker H. Achievable Accuracy in Single Point Incremental Forming: Case Studies. Proc. of the 8th Esaform Conf., vol. 2 (2005) 675-678
Ham M., and Jeswiet J. Forming Limit Curves in Single Point Incremental Forming. CIRP Annals-Manufacturing Technology 56/1 (2007) 277-280
Matsubara S. A Computer Numerically Controlled Dieless Incremental Forming of a Sheet Metal. Journal of Engineering Manufacture 215/7 (2001) 959-966
Young D., and Jeswiet J. Wall Thickness Variations in Single-Point Incremental Forming. Journal of Engineering Manufacture 18/11 (2004) 1453-1459
Kim T.J., and Yang D.Y. Improvement of Formability for the Incremental Sheet Metal Forming Process. The International Journal of Mechanical Sciences 42 (2001) 1271-1286
Hirt G., Ames J., Bambach M., and Kopp R. Forming Strategies and Process Modelling for CNC Incremental Sheet Forming. CIRP Annals-Manufacturing Technology V53/1 (2003) 203-206
Cescotto S., and Grober H. Calibration and Application of an Elastic-Visco-Plastic Constitutive Equation for Steels in Hot-Rolling Conditions. Engineering Computations 2 (1985) 101-106
Jetteur P., and Cescotto S. A Mixed Finite Element for the Analysis of Large Inelastic Strains. International Journal for Numerical Methods in Engineering 31 (1991) 229-239
He S., Van Bael A., Van Houtte P., Szekeres A., Duflou J.R., Henrard C., and Habraken A.M. Finite Element Modeling of Incremental Forming of Aluminum Sheets. Advanced Materials Research 6-8 (2005) 525-532