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Abstrakty
The theoretical and experimental method of optimization the aluminium billet’s contact surface during extrusion have been presented in this paper. The theoretical assumption, based on welding criteria, have been confirmed by experimental researches. The technique of measurement has been shown as well. Experiments are made using plasticine as a substiute material. Some kind of different variants have been investigated. The theory and experiments have been provided to optimize the modeling shape and may help in design and technology. The theory has been tested experimentally using a plasticine as a substitute material and a plexiglass die such that the velocity fields at the surfaces could be observed and measured during plastic flow, allowing the empirical coefficients in the mathematical formulation to be estimated. On the basis of the theory and experiments an optimal billet’s contact surface was proposed.
Czasopismo
Rocznik
Strony
245--250
Opis fizyczny
Bilbiogr. 15 poz., il., rys.
Twórcy
autor
- Chair of Production Engineering, Technical University of Białystok, Wiejska St. 45C , 15-351 Białystok, Poland
autor
- Chair of Production Engineering, Technical University of Białystok, Wiejska St. 45C , 15-351 Białystok, Poland
autor
- COBRABiD sp. z o.o., 00-842 Warszawa, ul. Łucka 15
Bibliografia
- [1] Akeret, R., „Properties of Pressure Welds in Extruded Aluminium Alloy Sections”, Journal of the Institute of Metals, 10, p. 202, (1972).
- [2] Giljdengorn, M. S. et al., „Pressovanie so svarkoj poljihizdelij iz Aljominievljih splavov” (Extrusion of Hollow Aluminium Sections with Welds), Metalurgija, Moscow, 1975.
- [3] Laue, K. and Stenger, H., „Extrusion”, Aluminium-Verlag GmbH, Dusseldorf, 1976.
- [4] Akeret, R., „Extrusion Welds – Quality Aspects are Now Center Stage”, Proceedings of 5th International Aluminium Extrusion Technology Seminar ET’92, Chicago, Vol. I, p. 319-336, 1992.
- [5] Misiolek, W. Z. and Kelly, R. M., „Dead Metal Zones in Extrusion of Complex Shapes”, Proceedings of 5th International Aluminium Extrusion Technology Seminar ET’92, Chicago, Vol. I, p. 315-318, 1992.
- [6] Valberg, H. and Groenseth R. A., „Deformation and Metal Flow when Extruding Hollow Aluminium Profiles”, Int. J. Mat. & Prod. Techn. Vol. 8, No. 1, 1993.
- [7] Y. Beygelzimer, A. Reshetov, S. Synkov, O. Prokof’eva, R. Kulagin: Kinematics of metal flow during twist extrusion investigated with a new experimental method, Journal of materials processing technology, 209 (2009) 3650–3656.
- [8] C. Karadogan, R. Grueebler, P. Hora: A new cone-friction test for evaluating friction phenomena in extrusion processes, Key Engineering Materials Vol. 424 (2010) pp 161-166.
- [9] G. Hirt, R. Kopp: Thixoforming: Semi-solid Metal Processing, Wiley-VCH, 2009.
- [10] S. Z. Qamar: FEM study of extrusion complexity and dead metal zone, Archives of Materials Science and Engineering Vol. 36, No 2 (2009) 110-117.
- [11] J. Piwnik, A. Patejuk: Energetistic criterion of longitudinal welding in hot extrusion of aluminium alloys, Archives of Foundry, Vol. 6, no. 18 (2006) 161-166 (in Polish).
- [12] J. Piwnik, A. Patejuk: Criterion of transversal welding in hot extrusion of aluminium alloys, Archives of Foundry, - Vol. 6, No. 18 (2006) 155-160 (in Polish).
- [13] J. Piwnik, A. Patejuk: Die-channel Optimization for Tixoforming Tools, Archives of Foundry, Vol. 6, no. 21 (2006) 13-18 (in Polish).
- [14] G. Skorulski, J. Piwnik: Rheological properties of substitute materials in semi-solid extrusion of aluminium alloys: Proceedings of 22nd Symposium on Experimental Mechanics of Solids, Jachranka (2006) 441-446 (in Polish).
- [15] K. P. Sołek, A. Łukaszek-Sołek, R. Kuziak: Rheological properties of alloys near solidus point intended for thixoforming, Archives of Civil and Mechanical Engineering, Vol. IX, No. 1, (2009) 111-117.
Typ dokumentu
Bibliografia
Identyfikator YADDA
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