Experimental Analysis of Mechanical Characteristics of KOBO Extrusion Method

• Autorzy: Balawender T. , Zwolak M. , Bąk Ł.

Identyfikatory

DOI

10.24425/amm.2020.132800

• Języki publikacji: EN

Abstrakty

EN

The paper presents selected results of KOBO extrusion process of circular profile φ10 mm from aluminum alloy 2099. The main aim of the performed research was to determine the influence of the oscillation frequency of a die on the magnitude of extrusion force. During the process such parameters, as extrusion force, rate of stem and frequency of die oscillation were recorded; oscillating angle of a die was constant and equal ±8°. The die oscillation frequency was changeable in performed tests in the range of 2÷7 Hz. The obtained results allowed to determine the relation between the maximum extrusion force and the die oscillation frequency during extrusion of aluminum 2099 alloy. The paper focuses on the experimental analysis of mechanical characteristics of the KOBO process. Basing on the recorded force versus stem position, three stages of KOBO extrusion process were determined, i.e. initialization, stabilization and uniform extrusion. Points separating these stages are two inflection points of recorded diagram. The analysis of each stage was made basing on the results of force diagrams and literature data.

Słowa kluczowe

EN

direct extrusion; KOBO extrusion; aluminium alloy 2099

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2020
• Tom: Vol. 65, iss. 2
• Strony: 615--619
• Opis fizyczny: Bibliogr. 10 poz., fot., tab.

Twórcy

autor

Balawender T.

• Rzeszow University of Technology, 8 Powstańców Warszawy Str., 35-959 Rzeszów, Poland

autor

Zwolak M.

• Rzeszow University of Technology, 8 Powstańców Warszawy Str., 35-959 Rzeszów, Poland

autor

Bąk Ł.

• Rzeszow University of Technology, 8 Powstańców Warszawy Str., 35-959 Rzeszów, Poland

Bibliografia

• [1] W. Bochniak, K. Marszowski, A. Korbel, Theoretical and practical aspects of the production of thin-walled tubes by the KOBO metod, J. Mater. Process Tech. 169, 44-53 (2005).
• [2] A. Korbel, W. Bochniak, Method of plastic forming of materials. U.S. patent 5.737.959 (1998), European Patent 0.711.220 (2000).
• [3] K. Pieła, L. Błaż, M. Jaskowski, Effects of extrusion parameters by KoBo method on the mechanical properties and microstructure of aluminum, Arch. Metall. Mater. 58, 3, 683-689 (2013).
• [4] P. Koprowski, M. Bieda, S. Boczkal, A. Jarzębska, P. Ostachowski, J. Kawałko, T. Czeppe, W. Maziarz, M. Łagoda, K. Sztwiertnia, AA6013 aluminium alloy deformed by forward-backward rotating die (KoBo): microstructure and mechanical properties control by changing the die oscillation frequency, J. Mater. Process Tech. 253, 34-42 (2018).
• [5] W. Bochniak., A. Korbel, P. Ostachowski, S. Ziółkiewicz, J. Borowski, Wyciskanie metali i stopów metodą KOBO, Obróbka Plastyczna Metali 24, 2, 83-97 (2013).
• [6] P. Ostachowski, Analiza mechanizmów odkształcenia w procesie wyciskania metalu z cykliczną zmianą drogi deformacji, PhD thesis, AGH, Kraków 2014.
• [7] W. Bochniak, A. Korbel, P. Ostachowski, M. Łagoda, Plastic flow of metals under cyclic change of deformation path conditions, Arch. Civ. Mech. Eng. 18, 679-686 (2018).
• [8] F. Li, G. N. Chu, E. L. Liu, R. Z. Wu, X. L. Zhang, Investigation of metal extrusion forming through steadily rotating container. Proc. I Mech. E Vol. 225 Part C: J. Mech. Eng. Sci. 2927-2937 (2018).
• [9] Extrusion. Second Edition, 2006. ASM International, Materials Park, Ohio, USA. Available online: www.asminternational.org.
• [10] L. Chen, G. Zhao, J. Yu, Effects of ram velocity on pyramid die extrusion of hollow aluminum profile. Int. J. Adv. Manuf. Technol. 79, 2117-2125 (2015).

Uwagi

PL

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).