Original scientific paper

The effect of upsetting ratio on mechanical properties for hydromechanically bulged axisymmetric components made from copper tubes

T. Miłek ; Kielce University of Technology, Poland

Abstract

The paper presents experimental results of investigations of hydromechanical bulge forming of copper axisymmetric components whose relative wall thickness was s₀/D = 0,045. The deformation ratio of material in the paper was defined as relative upsetting ratio Dl/l₀ (where Dl – the punch displacement, l₀ – initial length of tube). The investigations produced a liquid pressure and a force profile in hydromechanical bulge forming of copper axisymmetric components with different relative ratios Dl/l₀ = 0,054 ÷ 0,109. The research aimed to determine the impact of upsetting ratio on mechanical properties for hydromechanically bulged axisymmetric components. The tensile strength Rm increased and the percentage reduction of area Z decreased as the upsetting ratio Dl/l₀ increased.

Keywords

hydromechanical bulge forming; upsetting ratio; axisymmetric components; copper tubes; mechanical properties

Hrčak ID:

180983

URI

https://hrcak.srce.hr/180983

Publication date:

1.7.2017.

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