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1.
Pregled in analiza postopkov preoblikovanja pločevine z mediji
Marko Dobnikar, 2012, master's thesis

Abstract: Dandanes so vse večje zahteve po proizvodnji lažjih in okolju prijaznejših izdelkov. Te zahteve silijo predvsem avtomobilsko in letalsko industrijo k razvoju novih preoblikovalnih postopkov. Znanih je kar veliko preoblikovalnih postopkov pločevine, vendar vsi ne zadostijo naštetim zahtevam. Z vlaganjem v razvoj in s posodabljanjem že obstoječih postopkov je prišlo do množične uporabe preoblikovanih postopkov, ki temeljijo na preoblikovanju z uporabo medija. Za medij se lahko uporabijo plin, tekočina, trdi delci ali pa fleksibilno orodje. Z uporabo teh postopkov se drastično zmanjšajo stroški izdelave orodij za preoblikovanje. Kakovost preoblikovanih površin se pa izboljša. To sta tudi glavni prednosti postopkov preoblikovanja z medijem. V tem delu bodo predstavljeni postopki, ki temeljijo na preoblikovanju z uporabo medija. Največji poudarek bo na postopku Hydroformng, saj se v praksi največ uporablja. Omenjen bo tudi postopek globokega vleka z medijem. Predstavljeni bodo tudi novejši postopki, kot je inkrementalno preoblikovanje z vodnim curkom, VPF postopek itd. Opisani bodo tudi stroji in orodja, ki se uporabljajo pri preoblikovanju z medijem. Za vsak postopek bodo podani tudi primeri preoblikovanja iz prakse.
Keywords: preoblikovanje pločevine z medijem, medij, globoki vlek z medijem, Hydroforming, preoblikovanje pločevine
Published: 03.09.2012; Views: 1604; Downloads: 326
.pdf Full text (5,00 MB)

2.
Parameter optimization of tube hydroforming
Edina Karabegović, Miran Brezočnik, 2012, original scientific article

Abstract: Tube hydroforming is mostly applied in automotive industry. In this respect, necessity for the procedure improvement of fluid forming is constant. One of the reasons of its improvement is the procedure performance in optimal conditions. The process parameters have the direct influence on quality and optimal of forming procedure. This paper provides an example of the fluid pressure optimization in T-shape tube hydroforming. Three types of material have been analysed, with three wall thickness and three course levels of axial printers. For the optimization, the evolutional method with applied genetic algorithm (GA) was utilized. The application of GA is significant in solving of many problems in engineering practice. The simplicity and adaptability of the genetic algorithm to the engineering problem results with the increasing volume of applications in a research work. In this paper we investigated interactions of the internal parameters of the T tube hydroforming process, towards achieving the GA model for the optimal internal pressure, necessary for hydroforming.
Keywords: hydroforming, tube, modelling, optimization, parameter, genetic algorithm, T-shape
Published: 10.07.2015; Views: 1000; Downloads: 22
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