from the conferences organized by TANGER Ltd. provisional website
The paper presents experimental results that concern hydromechanical bulging of copper axisymmetric components whose relative wall thickness was s0 / D = 0.045. The investigations aimed to determine the impact of degree of deformation on wall thickness distribution in longitudinal section of hydromechanically bulged axisymmetric components. The degree of deformation of material was defined as relative upsetting ratio Dl / l0 (where Dl – the punch displacement, l0 – initial length of tube). Changes in the wall thickness distribution in longitudinal sections of hydromechanically bulged copper axisymmetric components with different ratio Dl / l0 = 0.054 ÷ 0.109 were similar in character. The greatest wall thickening occurred on the radii of body transition to the spherical cup. The wall thinning was found to appear in the caps. The wall thickness in the cylindrical part of the axisymmetric components was compared with the initial thickness of the tube s0. The maximum thickening and thinning of the wall were found in the samples with the greatest Dl / l0 = 0.109.Keywords: Hydromechanical bulge forming, hydroforming, upsetting ratio, axisymmetric components, wall thickness distributions
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