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Effects of Loading Paths on Hydrodynamic Deep Drawing with Independent Radial Hydraulic Pressure of Aluminum Alloy Based on Numerical Simulation

Xiaojing LIU

材料科学技术(英文)

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 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 , deep , drawing , Numerical , simu

基于多元统计学的大尹格庄金矿床深部地球化学找矿标志研究

禚传源 , 李洪奎 , 单伟 , 耿科 , 李大鹏 , 伏振坤

黄金 doi:10.11792/hj20140805

在大尹格庄金矿床深部勘查钻孔ZK4孔地球化学测量的基础上,通过应用多元统计学中的相关分析、聚类分析和因子分析,探讨与Au成矿有关的深部地球化学找矿标志。研究结果表明:Hg可做为该矿床与Au成矿有关的通用指示元素;Au和Ag的相关系性最高,Ag可作为矿区内找金的指示元素;因子分析中公因子为典型的热液矿床元素组合;Au-Ag-Bi是该金矿床成矿预测最有效的指示标志。

关键词: 地质统计学 , 地球化学 , 深部 , 找矿标志 , 大尹格庄金矿床

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