Paper Title:
Development of the Hot Gas Bulging Process for Aluminium Alloy Tube Using Resistance Heating
  Abstract

A hot gas bulging process of an aluminium alloy tube using resistance heating, set into a forming machine, was developed. The tube was rapidly heated by the electrifying to increase the formability and to decrease the flow stress. The tube was bulged by thermally expanding the air sealed in the tube without control of internal pressure during the forming. Hot gas bulging of an aluminium alloy tube without and with axial feeding was performed. The effects of the initial internal pressure and the current on the expansion ratio of the tube were examined. The decrease in temperature around the contact with the electrode was prevented by inserting a stainless steel ring having low thermal conductivity and high heat generation between the copper electrode and tube, and thus the bulging length was increased. It was found that the hot gas bulging is effective in heightening the formability of the aluminium alloy tubes.

  Info
Periodical
Key Engineering Materials (Volumes 410-411)
Main Theme
Edited by
B. Shirvani, R. Clarke, J. Duflou, M. Merklein, F. Micari and J. Griffiths
Pages
315-323
DOI
10.4028/www.scientific.net/KEM.410-411.315
Citation
T. Maeno, K. Mori, K. Fujimoto, "Development of the Hot Gas Bulging Process for Aluminium Alloy Tube Using Resistance Heating", Key Engineering Materials, Vols. 410-411, pp. 315-323, 2009
Online since
March 2009
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Price
$32.00
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