Influence of internal pressure on hydroforming of double handles crankshaft

Lin, Jun-feng; Yuan, Shijian

doi:10.1016/j.msea.2007.10.120

Cited by 11 publications

(3 citation statements)

References 2 publications

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“…Recently, a lot of researchers have investigated loading conditions to achieve optimum process conditions. 1,[7][8][9][10][11][12][13] The results and observation from these previous studies imply that the strategic control of the loading path can be used advantageously to enhance tube hydroformability. Before fracture occurs, localized deformation (namely, necking) occurs in a small region of the tube.…”

Section: Introductionmentioning

confidence: 99%

Enhancing hydroformability of nonaxisymmetric part with variable cross section

Kang

Joo

et al. 2015

Advances in Mechanical Engineering

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Methodology to enhance hydroformability of nonaxisymmetric thin-wall tubular component with variable cross sections was investigated in this study. In order to solve punch leakage problem occurred at nonaxisymmetric thin tube, the leakresistive punch was suggested. Attaching lead at contact region of tube and punch was implemented to prevent leakage occurred due to uneven pressure distribution between punch and tube. And lead patch has also been attached at locally strain-concentrated tube surface to retard strain-concentrated necking. To validate the proposed enhancing methodology, nonaxisymmetric thin-wall tubular model part with variable cross sections has been hydroformed. The successful fabrication of model part that had previously failed during conventional hydroforming processing confirms the feasibility of proposed methodology.

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Section: Introductionmentioning

confidence: 99%

Enhancing hydroformability of nonaxisymmetric part with variable cross section

Kang

Joo

et al. 2015

Advances in Mechanical Engineering

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“…The sheet and tube metal hydroforming technique can effectively improve the forming limit of the workpiece. 6,7 Mechanical property parameters of the sheets are commonly obtained by the tensile test, but the test cannot reasonably reflect the stress state of the sheets in a hydraulic environment. 8,9 Applying uniform hydrostatic pressure during the uniaxial tensile process can improve the limit of forming properties to a certain extent.…”

Section: Introductionmentioning

confidence: 99%

Deformation behavior and fracture morphology in the uniaxial tension process of stainless steel sheets under the fluid pressure

Zhang

Yuan

2014

Proceedings of the Institution of Mechanical Engineers, Part B:

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The sheet metal hydroforming technique is easy to achieve lightweight and is widely applied in the aerospace and automotive fields. In order to realize the reliability test for uniaxial tensile forming properties of sheet metals under the condition of three-dimensional stress, experimental apparatus and dedicated fixtures for uniaxial tensile tests of sheet metals under fluid pressure are designed in this article. The stainless steel 304 is employed for this experiment, and commercial finite element software ABAQUS is also adopted to study the deformation behavior of sheet metals under fluid pressure. The results indicate that when the fluid pressure of gauge length reaches a certain value, the specific region will present “double necking” and the peak values of equivalent stress and reduction rate are much lower than that of the conventional ones. When the strain rate is 0.01 s−1, the elongation of the 0.95-mm thickness sheet increases more obviously, reaching 24.1%. With fluid pressure, the fracture morphologies of stainless steel thin sheets and thick sheets are all ridge distributed from both sides to the center of symmetry, and tiny dimples distribute mainly in the rest parts. Based on the results of the experiment and finite element method, the uniaxial tensile forming properties of sheet metals under fluid pressure have been evaluated successfully and easily by this experimental apparatus.

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“…It has to be underlined that the great flexibility offered by such technology can be enhanced if a proper calibration of the typical process parameters is developed [26][27][28]. In tube hydroforming processes the simultaneous actions of a fluid under pressure and a mechanical tool providing material feeding can lead to complex shape components characterised by good mechanical properties.…”

Section: Introductionmentioning

confidence: 99%