Lateral extrusion of tailor welded aluminum alloy pipes with a lost core of low temperature melting alloy

• Autorzy: Ohashi T. , Liu G.
• Języki publikacji: EN

Abstrakty

EN

Purpose: In this paper, the authors employ tailor welded aluminum alloy pipes for lateral extrusion process with a lost core to perform a hollow light-weight-part. Design/methodology/approach: The pipe is welded longitudinally by YAG-laser. “The lateral extrusion process with a lost core (LELC)” consists of lateral extrusion of pipes with a soluble solid core, called the “lost core”, which serves as a plastic mandrel. The process proceeds as follows. First, the pipe cavity is filled with the liquid low temperature melting material composing the lost core. The liquid is then solidified to form the soluble core of the pipe. The material is compressed longitudinally as a composite billet as well as forging, and extruded in the lateral direction. After the pipe is deformed, the lost core is melted and removed. s. The bulge by the LELC is carried out by extruding the material for the lateral direction, however the simple bulge by hydro-forming is done by internal pressure. Findings: The LELC process can make a hollow product having uneven wall thickness without the deformation concentrating on a thinner part of the material, because the circumferential deformation of the material will be performed by its meridian strain. Practical implications: The authors have developed LELC process in which the lost core consists of low-temperature melting alloys and have tried to apply the process to perform bulge process with a tailor-welded pipe having two different wall thickness. Originality/value: Optimum volume distribution is important for light-weight-parts, and employment of tailor-welded blanks is effective technique in sheet metal forming. Combination of employment of hollow shape and tailor-welded blanks seems to be hopeful.

Słowa kluczowe

EN

tube forming; tailored blanks; lateral extrusion; bulging; hollow product

PL

kształtowanie rur; tailored blanks; wytłaczanie poprzeczne; wybrzuszanie; produkt wydrążony

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2009
• Tom: Vol. 32, nr 1
• Strony: 61--65
• Opis fizyczny: Bibliogr. 3 poz., rys., tabl.

Twórcy

autor

Ohashi T.

autor

Liu G.

• Department of Mechanical Engineering, School of Science and Engineering, Kokushikan University, 4-28-1 Setagaya, Setagaya-ku, Tokyo, Japan,

Bibliografia

• [1] T. Ohashia, K. Hayashi, Lateral extrusion of A6063 aluminum alloy pipes with a lost core, Journal of Materials Processing Technology 138 (2003) 560-563.
• [2] T. Ohashi, K. Matui, Y. Saotome, The lateral extrusion of copper pipes with a lost core of low tempareture melting alooy, Journal of Materials Processing Technology 113 (2001) 98-102.
• [3] S. Fuchizawa, A. Shirayori, H. Yamamoto, M. Narazaki, Bulge forming of thin copper tube by axial compression and internal pressure, Journal of JSTP 35/398 (1994) 251 (in Japanese).