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Effects of Loading Paths on hydrodynamic deep drawing with Independent Radial Hydraulic Pressure of Aluminum Alloy Based on Numerical Simulation

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Journal of Materials Science & Technology 2008年第3期24卷 395-399页

作者： Xiaojing LIU Yongchao XU Shijian YUAN School of Materials Science and Engineering Harbin Institute of Technology Harbin 150001 China College of Materials Science and Engineering Harbin University of Science and Technology Harbin 150040 China

In order to meet the forming demands for low plasticity materials and large height-diameter ratio parts, a new process of hydrodynamic deep drawing （HDD） with independent radial hydraulic pressure is proposed. To investigate the effects of loading paths on the HDD with independent radial hydraulic pressure, the forming process of 5A06 aluminum alloy cylindrical cup with a hemispherical bottom was studied by numerical simulation. By employing the dynamic explicit analytical software ETA/Dynaform based on LS-DYNA3D, the effects of loading paths on the sheet-thickness distribution and surface quality were analyzed. The corresponding relations of the radial hydraulic pressure loading paths and the part＇s strain status on the forming limit diagram （FLD） were also discussed. The results indicated that a sound match between liquid chamber pressure and independent radial hydraulic pressure could restrain the serious thinning at the hemisphere bottom and that through adjusting radial hydraulic pressure could reduce the radial tensile strain and change the strain paths. Therefore, the drawing limit of the aluminum cylindrical cup with a hemispherical bottom could be increased significantly.

关键词： hydrodynamic deep drawing Numerical simulation Independent radial hydraulic pressure 5A06 aluminum alloy

Formation of Aluminum-magnesium Alloy Cup by hydrodynamic deep drawing with Twin-loading Paths

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Journal of Wuhan University of Technology(Materials Science) 2009年第2期24卷 193-197页

作者：刘晓晶 School of Materials Science and Engineering Harbin Institute of Technology College of Materials Science & Engineering Harbin University of Science and Technology

In order to overcome the limitation of hydro-rim deep drawing, a new process of hydrodynamic deep drawing （HDD） with independent radial hydraulic pressure was proposed. By employing the dynamic explicit analytical software ETA/DynaformS.5 which is based on LS-DYNA3D, the effects of independent radia! hydraulic pressure on the stress, strain and the sheet-thickness of aluminum-magnesium cylindrical cup with a hemispherical bottom were analyzed by numerical simulation. The feature of stress distribution is that there exists a stress-dividing circle in the flange, and the radius of dividing circle was determined by theoretical analysis and stimulation. The experimental results indicate that the reasonable match of independent radial hydraulic pressure and liquid chamber pressure can effectively reduce the thinning at the bottom of hemisphere, decrease the radial stress-strain, and improve the drawing limit of aiuminum-magnesium alloy cylindrical cup.

关键词： hydrodynamic deep drawing numerical simulation independent radial hydraulic pressure 5A06 aluminum-magnesium alloy

EFFECTS OF SPECIFIED BLANK SIZE ON BODY WRINKLING DURING hydrodynamic deep drawing OF TAPERED RECTANGULAR BOX

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Acta Metallurgica Sinica(English Letters) 2000年第2期13卷 476-480页

作者： L. H. Lang, D. C. Kang, S. H. Zhang, Z. R. Wang, S. J. Yuan, K. B. Nielsen and J. Dancket 1) Department of Materials Engineering, Harbin Institute of Technology, Harbin 150001, China 2) Aalberg University, Denmark

In this paper, the forming features of tapered rectangular box during hydrodynamic deep drawing are studied by means of *** effect rules of square blank corner corner amount on body wrinkling are recognized and corres... 详细信息

关键词： sheet metal forming hydrodynamic deep drawing FEM

Investigation into Influence of Pre-bulging on Subsequent hydrodynamic deep drawing

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Investigation into Influence of Pre-bulging on Subsequent Hy...