The wall thickness distributions in longitudinal sections hydromechanically bulged axisymmetric components made from copper and steel tubes

• Autorzy: Miłek T.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The paper presents experimental results that concern hydromechanical bulging of copper and P265TR1 steel axisymmetric component whose relative wall thickness was s0/D=0.04 (where s0 is the wall thickness and D is outer diameter of tube segments). Design/methodology/approach: The basic parameters of the hydromechanical process of bulge forming are: liquid pressure and axial loading. The process is employed while manufacturing pipe connections, including axisymmetric components. Copper pipe connections are used in hydraulic, heating, gas and waste water systems. The technology involves placing a tube segment in a die-cavity, pouring some liquid over it, and sealing the faces. Findings: The experimental investigations, described in the paper, on hydromechanical bulge forming of copper and P265TR1 steel axisymmetric component with the ratio h/d1=0.67 (where h is height and d1 is diameter of spherical cup) aimed to compare the wall thickness distribution in longitudinal sections of axisymmetric components. Besides it, the aim of experimental inwestigations was to compare patterns of pressure changes and force at relative displacement up to ∆l/l0=0.06. Research limitations/implications: The results obtained in the experiment might be used as guidelines to develop a technological process for manufacturing such type of connections with the method of hydromechanical bulge forming. They also could be helpful while applying the method to industrial practice. Originality/value: The experimental investigations, described in the paper aimed to determine the possibility of hydromechanical bulge forming of axisymmetric components made from copper and steel tubes, compare force waveforms at the constant upsetting ratio, compare distribution of wall thickness.

Słowa kluczowe

EN

hydromechanical bulge forming; hydroforming; axisymmetric component; wall thickness distribution

PL

rozpęczanie hydromechaniczne; hydroformowanie; rozkład grubości ścianek

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2014
• Tom: Vol. 65, nr 1
• Strony: 20--25
• Opis fizyczny: Bibliogr. 15 poz., rys., tab.

Twórcy

autor

Miłek T.

• Department of Applied Computer Science and Armament Engineering, Faculty of Mechatronics and Machine Design, Kielce University of Technology, Al. Tysiąclecia Państwa Polskiego 7, 25-314 Kielce, Poland

Bibliografia

• [1] J. Chałupczak, Hydromechanic bulging in the application to the forming of pipe tees and crosses, Kielce University of Technology Scientific Papers. Mechanics 39, Habilitation dissertation, Kielce, 1986 (in Polish).
• [2] J. Chałupczak, A. Długosz, Hydromechanical bulge forming of axisymmetric parts, Mechanics 4 (1986) (in Polish).
• [3] Ch. Hartl, Research and advances in fundamentals and industrial applications of hydroforming, Journal of Materials Processing Technology 167 (2005) 383-392.
• [4] T. Miłek, Determining the parameters of hydro-mechanical bulge forming of axisymmetric components made from copper tubes, Proceedings of the 23rd International Conference “Metallurgy and Materials” Metal 2014, Brno, Czech Republic (CD-ROM).
• [5] T. Miłek, Examination of hydromechanical bulge forming of copper cross-joints, PhD Thesis, Kielce University of Technology, 2004 (in Polish).
• [6] T. Miłek, Experimental research on hydromechanical bulge forming of pipe connections, Proceedings of the Metal Forming Conference 2008, Steel Research International 79/1 (2008) 280-287.
• [7] P. Ray, B.J. Mac Donald, Experimental study and finite element analysis of simple X- and T- branch tube hydroforming processes, International Journal of Mechanical Sciences 47 (2005) 1498-1518.
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• [9] H.K. Zadeh, M.M. Mashhadi, Finite element simulation and experiment in tube hydroforming of unequal T shapes, Journal of Materials Processing Technology 177 (2006) 684-687.
• [10] C.P. Nikhare, M. Weiss, P.D. Hodgson, Experimental and numerical investigation of low pressure tube hydroforming on 409 stainless steel, Proceedings of the Metal Forming Conference 2008, Steel Research International 79/1 (2008) 272-279.
• [11] B-D. Joo, C.H. Jeon, J.H. Jang, Y.H. Moon, Characterization of hydroforming process for flanged automotive parts, Proceedings of the 14th International Conference on Metal Forming, Steel Research International (2012) 659-662.
• [12] T. Maeno, K. Mori, K. Hayashi, M. Loh-Mousavi, Improvement of hydroformability of tube by control of wrinkling, Steel Research International 79/1 (2008) 265-271.
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• [14] H. Sadłowska, Application of modified forming limit diagram for hydroforming of copper tubes, Steel Research International 79/1 (2008) 324-331.
• [15] D. Janecki, K. Stępień, S. Adamczak, Problems of measurement of barrel- and saddle-shaped elements using the radial method, Measurement 43/5 (2010) 659-663.