An Investigation into the Comparison between Hot and Cold Forming of Copper-Aluminum Composite Tubes by utilizing Hydroforming and Gasforming Processes

Shahbazi-Karami, Javad Shahbazi-Karami1; Morad-Sheikhi, Mohamad; Payganeh, Gholamhasan; Malekzadeh, Keramat

Document Type : Research Paper

Authors

¹ Faculty of Mechanical Engineering, Shahid Rajaee Teacher Training University, Tehran, Iran

² Aerospace Research Center, Maleke Ashtar University of Technology, Tehran, Iran

Abstract

Nowadays the formability of multi-layered tubes through different kinds of forming processes has been of interest to researchers due to its vast applications in aerospace, oil and petrochemical industries. This study compares cold forming and hot forming of bi-layered composite tubes via hydroforming and gas blow forming the tubes in geometrical model of a closed die bulge. The effect of these forming processes operational conditions on the bi-layered copper (inside) – aluminum (outside) tubes forming, wrinkling, bursting, buckling and the thickness distribution controlling on the die profile region in various situations were investigated. Hydroforming process was executed at ambient temperature with the maximum pressure of 300 bar. The process of blow gas forming at 550 ° C temperature and 40 bar pressure was implemented. The expansion ratio of the bi-layered tube during the gas blow forming process exceeded 1.35 % in comparison that of hydroforming process. In addition, the die experienced burst before the fitting during the gas blow forming process. The undamaged closed die bulge was formed through 280 bar hydroforming process with the conditions of 6 mm linear loading and 1.65 mm maximum thinning.

Keywords

Main Subjects

Composite structures

References

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Journal of Science and Technology of Composites

An Investigation into the Comparison between Hot and Cold Forming of Copper-Aluminum Composite Tubes by utilizing Hydroforming and Gasforming Processes

References

Volume 4, Issue 2
Summer 2017
September 2017
Pages 205-218

An Investigation into the Comparison between Hot and Cold Forming of Copper-Aluminum Composite Tubes by utilizing Hydroforming and Gasforming Processes

References

Volume 4, Issue 2Summer 2017September 2017Pages 205-218

Volume 4, Issue 2
Summer 2017
September 2017
Pages 205-218