Numerical modeling of the welding phenomenon in forward aluminium extrusion process

• Autorzy: Piwnik J. , Kuprianowicz J. , Mogielnicki K.
• Języki publikacji: EN

Abstrakty

EN

There is often need to use welding methods in the aluminium alloys extrusion processes. Welding methods while extruding are divided in to transverse and longitudinal one. In paper the energy criterions for transverse and longitudinal joining during extrusion of aluminium alloys in warm conditions are showed. Numerical simulation results for two cylindrical billets transverse joining, during forward extruding with using the flat punch are presented. Irregularity in the billets material flow and presence of a void are proved. In order to equalization the flowing billets volumes streams, the numerical model for forward extrusion of cylindrical billets, with using the punch with a toe and initially formed upper billet is proposed. The application of this method causes both transverse and longitudinal welding schemes appearing. Combination of two welding schemas gives the product, which has a core made of material from the upper billet and external layers of the lower billet.

Słowa kluczowe

EN

plastic treatment; extrusion process; welding; tool design

PL

obróbka plastyczna; proces wyciskania; spawanie; projektowanie narzędzi

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2011
• Tom: Vol. 11, iss. 2 spec.
• Strony: 191--194
• Opis fizyczny: Bibliogr. 9 poz., rys., wykr.

Twórcy

autor

Piwnik J.

• The Department of Production Engineering, Bialystok Technical University Wiejska street 45C, 15-351 Białystok, Poland; Centralny Ośrodek Badawczo-Rozwojowy Aparatury Badawczej i Dydaktycznej COBRABiD, Łucka street 15, 00-842 Warsaw, Poland

autor

Kuprianowicz J.

• The Department of Production Engineering, Bialystok Technical University Wiejska street 45C, 15-351 Białystok, Poland

autor

Mogielnicki K.

• The Department of Production Engineering, Bialystok Technical University Wiejska street 45C, 15-351 Białystok, Poland

Bibliografia

• [1] M. Plata, J. Piwnik: Theoretical and Experimental Analysis of Seam weld Formation in Hot of Aluminium alloys, ET Chicago 2000.
• [2] J. Piwnik, A. Patejuk: Criterion of transversal welding in hot extrusion of aluminium alloys, Arch. of Foundry 6, 1,18, 2006; pp. 155-160.
• [3] J. Piwnik, A. Patejuk: Energetic criterion of longitudinal welding in hot extrusion of aluminium alloys, Arch. of Foundry, 6, 18, 1, 2006; pp. 161-166.
• [4] Q. Li, C. Harris, M. R. Jolly: Finite element modeling simulation of transverse welding phenomenon in aluminium extrusion process, Materials and Design, 24, 2003; pp. 493-496.
• [5] VI. Jonannes, CW. Jowett, RF. Dickson: Temperature distribution in aluminum extrusion billets, Proceedings of the Sixth International Aluminium Extrusion Technology Seminar, vol. 2 Chicago, Illinois, USA, May 1996; pp. 89-94.
• [6] R. Akeret: Properties of Pressure Welds in Extruded Aluminum Alloy Sections, J. Inst. Met., 10, 202, 1972.
• [7] R. Akeret: Extrusion Welds - Quality Aspects are Now Center Stage, Proceeding of 5th International Aluminium Extrusion Technology Seminar ET 92, Chicago, 1, 1992; pp. 319-336.
• [8] J. Piwnik: The mechanics of plastic flow in the metal extrusion problems, Wyższa Szkoła Ekonomiczna, Bialystok, 2010.
• [9] J. Piwnik: Theory and experiment in the analysis of extrusion process, Bialystok Technical University, Bialystok, 2010.