Design and Analysis of Multi-Point System for Forming Three Dimensional Free-Form Surfaces


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Multi-point Sheet metal forming is a flexible technique in which a discrete punches are used to generate the continuous 3-D surface . The proposed die comprises a set of matrices of a closely stacked discrete punches arranged to form a cavity in which a free form surface can be formed .The working surface of the multi-point die are modeled by a uniform B-spline and constructed by adjusting the height of each punch manually. Finite element simulation for the process was performed to study the effect of punch number on the shape error and thickness variation. Experimental work include the building of multi-point die to form the aluminum sheets. The effect using rubber interpolators on dimpling defect were also studied . The results revealed that thickness variation error between the numerical and experimental results is equal to 5% .



Edited by:

Prof. Adrian Olaru




A. K. J. Kadhim and R. A. Neama, "Design and Analysis of Multi-Point System for Forming Three Dimensional Free-Form Surfaces", Applied Mechanics and Materials, Vol. 841, pp. 9-14, 2016

Online since:

June 2016




[1] Tan F., Li M., Cai Z., and Li X., Formability analysis on the process of multi-point forming for titanium alloy retiary sheet, Int J Adv Manuf Technol , (2009).


[2] Mohamed F. A., Li X., and Mohamed A.N., Numerical Simulation Application In Multi Point Forming, IEEE, pp.502-504, (2010 ).

[3] Viorel P. and Virgil T., " Geometric Reconfiguration Of The Multipoint Forming Dies Using Reverse Engineering, Technologies In Machine Building, ISSN, pp.415-418, (2009).

[4] Li M.Z., Cai Z.Y., Sui Z. and Yan Q.G., Multi-point Forming Technology For Sheet Metal, Journal of Material Processing Technology, vol. 129, pp.333-338, (2002).


[5] Xi-Di C., Zhong-Yi C., and Ming-Zhe L., Digitized die forming system for sheet metal and springback minimizing Technique, Int J Adv Manuf Technol , vol. 28, p.1089–1096, (2006).


[6] Viorel P., Virgil T., Eugen G., and Dumitru N., Algorithm for The Geometric Configuration of The Reconfigurable Multipoint Forming Dies, Technologies In Machine Building, ISSN, pp.95-100, (2009).

[7] Viorel P., Virgil T., Alexandru E., Eugen G. and Gabriel B., Neural Network Application To The RE Configurable Multi-point Forming Process, University of Galati, pp.75-80, (2011).

[8] Fredrik A., Bezier and B-spline Technology, , June (2003).

[9] Nakasone Y. and Yoshimoto S., Engineering Analysis With ANSYS Software, Department of Mechanical Engineering, Tokyo University of Science, (2006).