Different Possibilities of Process Analysis in Cold Extrusion


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Cold extrusion is a technology which offers a number of advantages when compared to other manufacturing technologies. High mechanical properties of extruded component, short production time as well as significant cost effectiveness which can be achieved by implementation of this technology are the main characteristics of cold extrusion process. In order to design the complete extrusion process in optimal way it is crucial to know the main process parameters such as load, die pressure, stress and strain distribution within deformation zone etc. There is a number of methods for the analysis of cold extrusion processes. Current paper gives the insight into the possibilities of process analysis in three different cases of cold extrusion. Radial extrusion of gear like elements has been analyzed theoretically (Upper Bound method), numerically by FE simulation and experimentally. Die stressing has been measured by special device (pin load cell) in the process of forward extrusion. Third analyzed process was backward extrusion with profiled punch. In this process loading characteristics as well as some of the mechanical properties of extruded component were obtained experimentally.



Edited by:

Luca Tomesani and Lorenzo Donati




M. Plancak et al., "Different Possibilities of Process Analysis in Cold Extrusion", Key Engineering Materials, Vol. 367, pp. 209-214, 2008

Online since:

February 2008




[1] Kudo, H.: Towards net-shape Forming, Journal of Materials processing Technology, 22 (1990), pp.307-342.

DOI: https://doi.org/10.1016/0924-0136(90)90019-q

[2] Lange, K.: Zur Entwicklung des Kaltfliesspresens zu einer High-Tech Praezisionstechnologie, Umformtechnik, 26 (1992), 6, pp.412-418.

[3] Kondo, K: Development of new precision cold forging process, 1 st ICTR, Tokyo 1984, pp.876-88.

[4] Doege, E., Naegele, H.: Simulation of the precision forging process of bevel gears, Annals of the CIRP 01, Vol. 43/1/1994, pp.241-244.

DOI: https://doi.org/10.1016/s0007-8506(07)62204-5

[5] Plancak, M., Bramley, A., Osman, F.: Some observation on contact stress measurement by pin load cell in bulk metal forming, Journal of Materials processing Technology, 60 (1996), pp.339-342.

DOI: https://doi.org/10.1016/0924-0136(96)02351-5

[6] Plancak, M., Kuzman, K., Vilotic, D., Cupkovic, Dj.: Loading of dies in cold extrusion - FE simulation and experimental verification, ESAFORM 2006, Conference Glasgow, pp.491-495.

[7] R. E. Sliwa: Simulation of extrusion process using the ultrasonic vibrations, ESAFORM 2006, Conference Glasgow, pp.499-503.

[8] Tuncer, C., Dean, T.A.: Int. Mach. Tools Manufacturing, 28 (1988), 407.

[9] Plancak, M., Vilotiv, D., Vujovic, V.: One contribution to the investigation of gear extrusion, Advanced Technology of Plasticity 1996, 5 th ICTP, Ohio, Columbus, USA, pp.197-201.

[10] Plancak, M., Vilotic, D., Skakun, P.: A study of radial gear extrusion, Int. Journal of forming processes, Vol. 6, No. 1/2003. pp.71-87.

DOI: https://doi.org/10.3166/ijfp.6.71-86

[11] Plancak, M., Skunca, M., Math, M.: Analysis, FEM simulation and verification of gear cold extrusion, VII Conferencia internacional de forjamento - XXIII Senafor, Porto Alegre, Brazil, 2003. pp.28-39.