EFFECT OF THE UPSETTING RATIO ON WALL THICKNESS DISTRIBUTION IN LONGITUDINAL SECTION OF HYDROMECHANICALLY BULGED AXISYMMETRIC COMPONENTS MADE FROM COPPER TUBES

1 MIŁEK Tomasz
Institution:
1 Kielce University of Technology, Faculty of Mechatronics and Mechanical Engineering, Department of Applied Computer Science and Armament Engineering, al. Tysiąclecia Państwa Polskiego 7, 25-314 Kielce, Poland, tmatm@tu.kielce.pl
Conference:
26th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 24th - 26th 2017
Proceedings:
Proceedings 26th International Conference on Metallurgy and Materials
Pages:
478-483
ISBN:
978-80-87294-79-6
ISSN:
2694-9296
Published:
9th January 2018
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
30 views / 7 downloads
Abstract

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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