Naslov
Experimental modelling of charge welds in extrusion of tubes by means of hollow dies

Autori
Duplančić, Igor ; Marović, Pavao ; Prgin, Jere

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of 2nd ESAFORM Conference on Material Forming / Covas, J. A. - Guimaraes, 1999, 481-484

Skup
2nd ESAFORM Conference on Material Forming

Mjesto i datum
Guimarães, Portugal, 13.04.1999. - 17.04.1999

Vrsta sudjelovanja
Pozvano predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
experimental modelling; charge welds; extrusion of tubes; hollow dies

Sažetak
This paper deals with the analysis of shape of the charge welds in the extrusion of tubes by means of hollow dies (bridge dies) as a function of extrusion parameters, such as temperature, extrusion ratio and height of welding chamber. The experiments were performed by extrusion of Al99.5 tubes in laboratory conditions. The charge welds are graphically modelled by computer. Results of experiments supported by graphical modelling are used for making optimization of the extrusion parameters, taking the minimal length of the charge welds as criteria. The results of optimization have showed that decrease of the length of the charge welds, i.e. better metal flow through hollow dies, can be obtained by increasing the extrusion temperature, reducing extrusion ratio and lowering the height of the welding chamber.

Izvorni jezik
Engleski

Znanstvena područja
Građevinarstvo, Strojarstvo

POVEZANOST RADA