| Summary: | 碩士 === 國立中山大學 === 機械與機電工程學系研究所 === 90 ===
The objective of this study is to explore the effects of various process parameters upon the tube formability. In the condition of no axial loads and free bulging, the process parameters that affect tube bulge pressure and formability are die corner radius, tube thickness, bulge length and tube diameter. To proceed the experiments of tube hydro forming, this paper has designed and constructed an experimental system of tube hydroforming comprised of a hard tooling set, hydraulic pressurization circuit, an intensifier and a half ton hoisting device, firstly. In experiments, annealed aluminum alloy tubes are used to carry out the experiments with different tube thickness, bulge length and die corner radius. Furthermore, FEM packages are applied to proceed the analyses of bulge height, forming pressure and tube thickness distribution with forming parameters above. Finally, the comparisons between the analytical and experimental results are discussed to explore the deform action mechanism of tube hydro-forming.
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